--- /dev/null
+Binding for TI bq24257 Li-Ion Charger
+
+Required properties:
+- compatible: Should contain one of the following:
+ * "ti,bq24257"
+- reg: integer, i2c address of the device.
+- ti,battery-regulation-voltage: integer, maximum charging voltage in uV.
+- ti,charge-current: integer, maximum charging current in uA.
+- ti,termination-current: integer, charge will be terminated when current in
+ constant-voltage phase drops below this value (in uA).
+
+Example:
+
+bq24257 {
+ compatible = "ti,bq24257";
+ reg = <0x6a>;
+
+ ti,battery-regulation-voltage = <4200000>;
+ ti,charge-current = <1000000>;
+ ti,termination-current = <50000>;
+};
--- /dev/null
+Binding for TI bq25890 Li-Ion Charger
+
+Required properties:
+- compatible: Should contain one of the following:
+ * "ti,bq25890"
+- reg: integer, i2c address of the device.
+- ti,battery-regulation-voltage: integer, maximum charging voltage (in uV);
+- ti,charge-current: integer, maximum charging current (in uA);
+- ti,termination-current: integer, charge will be terminated when current in
+ constant-voltage phase drops below this value (in uA);
+- ti,precharge-current: integer, maximum charge current during precharge
+ phase (in uA);
+- ti,minimum-sys-voltage: integer, when battery is charging and it is below
+ minimum system voltage, the system will be regulated above
+ minimum-sys-voltage setting (in uV);
+- ti,boost-voltage: integer, VBUS voltage level in boost mode (in uV);
+- ti,boost-max-current: integer, maximum allowed current draw in boost mode
+ (in uA).
+
+Optional properties:
+- ti,boost-low-freq: boolean, if present boost mode frequency will be 500kHz,
+ otherwise 1.5MHz;
+- ti,use-ilim-pin: boolean, if present the ILIM resistor will be used and the
+ input current will be the lower between the resistor setting and the IINLIM
+ register setting;
+- ti,thermal-regulation-threshold: integer, temperature above which the charge
+ current is lowered, to avoid overheating (in degrees Celsius). If omitted,
+ the default setting will be used (120 degrees);
+
+Example:
+
+bq25890 {
+ compatible = "ti,bq25890";
+ reg = <0x6a>;
+
+ ti,battery-regulation-voltage = <4200000>;
+ ti,charge-current = <1000000>;
+ ti,termination-current = <50000>;
+ ti,precharge-current = <128000>;
+ ti,minimum-sys-voltage = <3600000>;
+ ti,boost-voltage = <5000000>;
+ ti,boost-max-current = <1000000>;
+
+ ti,use-ilim-pin;
+ ti,thermal-regulation-threshold = <120>;
+};
--- /dev/null
+Binding for Richtek rt9455 battery charger
+
+Required properties:
+- compatible: it should contain one of the following:
+ "richtek,rt9455".
+- reg: integer, i2c address of the device.
+- interrupt-parent: the phandle for the interrupt controller that
+ services interrupts for this device.
+- interrupts: interrupt mapping for GPIO IRQ, it should be
+ configured with IRQ_TYPE_LEVEL_LOW flag.
+- richtek,output-charge-current: integer, output current from the charger to the
+ battery, in uA.
+- richtek,end-of-charge-percentage: integer, percent of the output charge current.
+ When the current in constant-voltage phase drops
+ below output_charge_current x end-of-charge-percentage,
+ charge is terminated.
+- richtek,battery-regulation-voltage: integer, maximum battery voltage in uV.
+- richtek,boost-output-voltage: integer, maximum voltage provided to consumer
+ devices, when the charger is in boost mode, in uV.
+
+Optional properties:
+- richtek,min-input-voltage-regulation: integer, input voltage level in uV, used to
+ decrease voltage level when the over current
+ of the input power source occurs.
+ This prevents input voltage drop due to insufficient
+ current provided by the power source.
+ Default: 4500000 uV (4.5V)
+- richtek,avg-input-current-regulation: integer, input current value in uA drained by the
+ charger from the power source.
+ Default: 500000 uA (500mA)
+
+Example:
+
+rt9455@22 {
+ compatible = "richtek,rt9455";
+ reg = <0x22>;
+
+ interrupt-parent = <&gpio1>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+
+ richtek,output-charge-current = <500000>;
+ richtek,end-of-charge-percentage = <10>;
+ richtek,battery-regulation-voltage = <4200000>;
+ richtek,boost-output-voltage = <5050000>;
+
+ richtek,min-input-voltage-regulation = <4500000>;
+ richtek,avg-input-current-regulation = <500000>;
+};
(datasheet-recommended value is 10000).
Defining this property enables current-sense functionality.
+Optional threshold properties :
+ If skipped the condition won't be reported.
+ - maxim,cold-temp : Temperature threshold to report battery
+ as cold (in tenths of degree Celsius).
+ - maxim,over-heat-temp : Temperature threshold to report battery
+ as over heated (in tenths of degree Celsius).
+ - maxim,dead-volt : Voltage threshold to report battery
+ as dead (in mV).
+ - maxim,over-volt : Voltage threshold to report battery
+ as over voltage (in mV).
+
Example:
battery-charger@36 {
compatible = "maxim,max17042";
reg = <0x36>;
maxim,rsns-microohm = <10000>;
+ maxim,over-heat-temp = <600>;
+ maxim,over-volt = <4300>;
};
ramtron Ramtron International
realtek Realtek Semiconductor Corp.
renesas Renesas Electronics Corporation
+richtek Richtek Technology Corporation
ricoh Ricoh Co. Ltd.
rockchip Fuzhou Rockchip Electronics Co., Ltd
samsung Samsung Semiconductor
int i;
power_supply_unregister(info->usb);
- free_irq(info->irq[0], info);
for (i = 0; i < info->irq_nums; i++)
free_irq(info->irq[i], info);
return 0;
This driver can also be built as a module. If so, the module will be
called da9150-charger.
+config AXP288_CHARGER
+ tristate "X-Powers AXP288 Charger"
+ depends on MFD_AXP20X && EXTCON_AXP288
+ help
+ Say yes here to have support X-Power AXP288 power management IC (PMIC)
+ integrated charger.
+
config AXP288_FUEL_GAUGE
tristate "X-Powers AXP288 Fuel Gauge"
depends on MFD_AXP20X && IIO
help
Say Y to enable support for the TI BQ24190 battery charger.
+config CHARGER_BQ24257
+ tristate "TI BQ24257 battery charger driver"
+ depends on I2C && GPIOLIB
+ depends on REGMAP_I2C
+ help
+ Say Y to enable support for the TI BQ24257 battery charger.
+
config CHARGER_BQ24735
tristate "TI BQ24735 battery charger support"
depends on I2C && GPIOLIB
help
Say Y to enable support for the TI BQ24735 battery charger.
+config CHARGER_BQ25890
+ tristate "TI BQ25890 battery charger driver"
+ depends on I2C && GPIOLIB
+ select REGMAP_I2C
+ help
+ Say Y to enable support for the TI BQ25890 battery charger.
+
config CHARGER_SMB347
tristate "Summit Microelectronics SMB347 Battery Charger"
depends on I2C
The fuelgauge calculates and determines the battery state of charge
according to battery open circuit voltage.
+config CHARGER_RT9455
+ tristate "Richtek RT9455 battery charger driver"
+ depends on I2C && GPIOLIB
+ select REGMAP_I2C
+ help
+ Say Y to enable support for Richtek RT9455 battery charger.
+
source "drivers/power/reset/Kconfig"
endif # POWER_SUPPLY
obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o
obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
+obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o
obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o
obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
+obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o
obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o
+obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o
obj-$(CONFIG_POWER_AVS) += avs/
obj-$(CONFIG_CHARGER_SMB347) += smb347-charger.o
obj-$(CONFIG_CHARGER_TPS65090) += tps65090-charger.o
obj-$(CONFIG_POWER_RESET) += reset/
obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o
+obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o
--- /dev/null
+/*
+ * axp288_charger.c - X-power AXP288 PMIC Charger driver
+ *
+ * Copyright (C) 2014 Intel Corporation
+ * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/regmap.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/usb/otg.h>
+#include <linux/notifier.h>
+#include <linux/power_supply.h>
+#include <linux/notifier.h>
+#include <linux/property.h>
+#include <linux/mfd/axp20x.h>
+#include <linux/extcon.h>
+
+#define PS_STAT_VBUS_TRIGGER (1 << 0)
+#define PS_STAT_BAT_CHRG_DIR (1 << 2)
+#define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
+#define PS_STAT_VBUS_VALID (1 << 4)
+#define PS_STAT_VBUS_PRESENT (1 << 5)
+
+#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
+#define CHRG_STAT_BAT_VALID (1 << 4)
+#define CHRG_STAT_BAT_PRESENT (1 << 5)
+#define CHRG_STAT_CHARGING (1 << 6)
+#define CHRG_STAT_PMIC_OTP (1 << 7)
+
+#define VBUS_ISPOUT_CUR_LIM_MASK 0x03
+#define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
+#define VBUS_ISPOUT_CUR_LIM_900MA 0x0 /* 900mA */
+#define VBUS_ISPOUT_CUR_LIM_1500MA 0x1 /* 1500mA */
+#define VBUS_ISPOUT_CUR_LIM_2000MA 0x2 /* 2000mA */
+#define VBUS_ISPOUT_CUR_NO_LIM 0x3 /* 2500mA */
+#define VBUS_ISPOUT_VHOLD_SET_MASK 0x31
+#define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
+#define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000 /* 4000mV */
+#define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100 /* 100mV */
+#define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3 /* 4300mV */
+#define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7)
+
+#define CHRG_CCCV_CC_MASK 0xf /* 4 bits */
+#define CHRG_CCCV_CC_BIT_POS 0
+#define CHRG_CCCV_CC_OFFSET 200 /* 200mA */
+#define CHRG_CCCV_CC_LSB_RES 200 /* 200mA */
+#define CHRG_CCCV_ITERM_20P (1 << 4) /* 20% of CC */
+#define CHRG_CCCV_CV_MASK 0x60 /* 2 bits */
+#define CHRG_CCCV_CV_BIT_POS 5
+#define CHRG_CCCV_CV_4100MV 0x0 /* 4.10V */
+#define CHRG_CCCV_CV_4150MV 0x1 /* 4.15V */
+#define CHRG_CCCV_CV_4200MV 0x2 /* 4.20V */
+#define CHRG_CCCV_CV_4350MV 0x3 /* 4.35V */
+#define CHRG_CCCV_CHG_EN (1 << 7)
+
+#define CNTL2_CC_TIMEOUT_MASK 0x3 /* 2 bits */
+#define CNTL2_CC_TIMEOUT_OFFSET 6 /* 6 Hrs */
+#define CNTL2_CC_TIMEOUT_LSB_RES 2 /* 2 Hrs */
+#define CNTL2_CC_TIMEOUT_12HRS 0x3 /* 12 Hrs */
+#define CNTL2_CHGLED_TYPEB (1 << 4)
+#define CNTL2_CHG_OUT_TURNON (1 << 5)
+#define CNTL2_PC_TIMEOUT_MASK 0xC0
+#define CNTL2_PC_TIMEOUT_OFFSET 40 /* 40 mins */
+#define CNTL2_PC_TIMEOUT_LSB_RES 10 /* 10 mins */
+#define CNTL2_PC_TIMEOUT_70MINS 0x3
+
+#define CHRG_ILIM_TEMP_LOOP_EN (1 << 3)
+#define CHRG_VBUS_ILIM_MASK 0xf0
+#define CHRG_VBUS_ILIM_BIT_POS 4
+#define CHRG_VBUS_ILIM_100MA 0x0 /* 100mA */
+#define CHRG_VBUS_ILIM_500MA 0x1 /* 500mA */
+#define CHRG_VBUS_ILIM_900MA 0x2 /* 900mA */
+#define CHRG_VBUS_ILIM_1500MA 0x3 /* 1500mA */
+#define CHRG_VBUS_ILIM_2000MA 0x4 /* 2000mA */
+#define CHRG_VBUS_ILIM_2500MA 0x5 /* 2500mA */
+#define CHRG_VBUS_ILIM_3000MA 0x6 /* 3000mA */
+
+#define CHRG_VLTFC_0C 0xA5 /* 0 DegC */
+#define CHRG_VHTFC_45C 0x1F /* 45 DegC */
+
+#define BAT_IRQ_CFG_CHRG_DONE (1 << 2)
+#define BAT_IRQ_CFG_CHRG_START (1 << 3)
+#define BAT_IRQ_CFG_BAT_SAFE_EXIT (1 << 4)
+#define BAT_IRQ_CFG_BAT_SAFE_ENTER (1 << 5)
+#define BAT_IRQ_CFG_BAT_DISCON (1 << 6)
+#define BAT_IRQ_CFG_BAT_CONN (1 << 7)
+#define BAT_IRQ_CFG_BAT_MASK 0xFC
+
+#define TEMP_IRQ_CFG_QCBTU (1 << 4)
+#define TEMP_IRQ_CFG_CBTU (1 << 5)
+#define TEMP_IRQ_CFG_QCBTO (1 << 6)
+#define TEMP_IRQ_CFG_CBTO (1 << 7)
+#define TEMP_IRQ_CFG_MASK 0xF0
+
+#define FG_CNTL_OCV_ADJ_EN (1 << 3)
+
+#define CV_4100MV 4100 /* 4100mV */
+#define CV_4150MV 4150 /* 4150mV */
+#define CV_4200MV 4200 /* 4200mV */
+#define CV_4350MV 4350 /* 4350mV */
+
+#define CC_200MA 200 /* 200mA */
+#define CC_600MA 600 /* 600mA */
+#define CC_800MA 800 /* 800mA */
+#define CC_1000MA 1000 /* 1000mA */
+#define CC_1600MA 1600 /* 1600mA */
+#define CC_2000MA 2000 /* 2000mA */
+
+#define ILIM_100MA 100 /* 100mA */
+#define ILIM_500MA 500 /* 500mA */
+#define ILIM_900MA 900 /* 900mA */
+#define ILIM_1500MA 1500 /* 1500mA */
+#define ILIM_2000MA 2000 /* 2000mA */
+#define ILIM_2500MA 2500 /* 2500mA */
+#define ILIM_3000MA 3000 /* 3000mA */
+
+#define AXP288_EXTCON_DEV_NAME "axp288_extcon"
+
+#define AXP288_EXTCON_SLOW_CHARGER "SLOW-CHARGER"
+#define AXP288_EXTCON_DOWNSTREAM_CHARGER "CHARGE-DOWNSTREAM"
+#define AXP288_EXTCON_FAST_CHARGER "FAST-CHARGER"
+
+enum {
+ VBUS_OV_IRQ = 0,
+ CHARGE_DONE_IRQ,
+ CHARGE_CHARGING_IRQ,
+ BAT_SAFE_QUIT_IRQ,
+ BAT_SAFE_ENTER_IRQ,
+ QCBTU_IRQ,
+ CBTU_IRQ,
+ QCBTO_IRQ,
+ CBTO_IRQ,
+ CHRG_INTR_END,
+};
+
+struct axp288_chrg_info {
+ struct platform_device *pdev;
+ struct axp20x_chrg_pdata *pdata;
+ struct regmap *regmap;
+ struct regmap_irq_chip_data *regmap_irqc;
+ int irq[CHRG_INTR_END];
+ struct power_supply *psy_usb;
+ struct mutex lock;
+
+ /* OTG/Host mode */
+ struct {
+ struct work_struct work;
+ struct extcon_specific_cable_nb cable;
+ struct notifier_block id_nb;
+ bool id_short;
+ } otg;
+
+ /* SDP/CDP/DCP USB charging cable notifications */
+ struct {
+ struct extcon_dev *edev;
+ bool connected;
+ enum power_supply_type chg_type;
+ struct notifier_block nb;
+ struct work_struct work;
+ } cable;
+
+ int health;
+ int inlmt;
+ int cc;
+ int cv;
+ int max_cc;
+ int max_cv;
+ bool online;
+ bool present;
+ bool enable_charger;
+ bool is_charger_enabled;
+};
+
+static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
+{
+ u8 reg_val;
+ int ret;
+
+ if (cc < CHRG_CCCV_CC_OFFSET)
+ cc = CHRG_CCCV_CC_OFFSET;
+ else if (cc > info->max_cc)
+ cc = info->max_cc;
+
+ reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
+ cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
+ reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
+
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_CHRG_CTRL1,
+ CHRG_CCCV_CC_MASK, reg_val);
+ if (ret >= 0)
+ info->cc = cc;
+
+ return ret;
+}
+
+static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
+{
+ u8 reg_val;
+ int ret;
+
+ if (cv <= CV_4100MV) {
+ reg_val = CHRG_CCCV_CV_4100MV;
+ cv = CV_4100MV;
+ } else if (cv <= CV_4150MV) {
+ reg_val = CHRG_CCCV_CV_4150MV;
+ cv = CV_4150MV;
+ } else if (cv <= CV_4200MV) {
+ reg_val = CHRG_CCCV_CV_4200MV;
+ cv = CV_4200MV;
+ } else {
+ reg_val = CHRG_CCCV_CV_4350MV;
+ cv = CV_4350MV;
+ }
+
+ reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
+
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_CHRG_CTRL1,
+ CHRG_CCCV_CV_MASK, reg_val);
+
+ if (ret >= 0)
+ info->cv = cv;
+
+ return ret;
+}
+
+static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
+ int inlmt)
+{
+ int ret;
+ unsigned int val;
+ u8 reg_val;
+
+ /* Read in limit register */
+ ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
+ if (ret < 0)
+ goto set_inlmt_fail;
+
+ if (inlmt <= ILIM_100MA) {
+ reg_val = CHRG_VBUS_ILIM_100MA;
+ inlmt = ILIM_100MA;
+ } else if (inlmt <= ILIM_500MA) {
+ reg_val = CHRG_VBUS_ILIM_500MA;
+ inlmt = ILIM_500MA;
+ } else if (inlmt <= ILIM_900MA) {
+ reg_val = CHRG_VBUS_ILIM_900MA;
+ inlmt = ILIM_900MA;
+ } else if (inlmt <= ILIM_1500MA) {
+ reg_val = CHRG_VBUS_ILIM_1500MA;
+ inlmt = ILIM_1500MA;
+ } else if (inlmt <= ILIM_2000MA) {
+ reg_val = CHRG_VBUS_ILIM_2000MA;
+ inlmt = ILIM_2000MA;
+ } else if (inlmt <= ILIM_2500MA) {
+ reg_val = CHRG_VBUS_ILIM_2500MA;
+ inlmt = ILIM_2500MA;
+ } else {
+ reg_val = CHRG_VBUS_ILIM_3000MA;
+ inlmt = ILIM_3000MA;
+ }
+
+ reg_val = (val & ~CHRG_VBUS_ILIM_MASK)
+ | (reg_val << CHRG_VBUS_ILIM_BIT_POS);
+ ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val);
+ if (ret >= 0)
+ info->inlmt = inlmt;
+ else
+ dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
+
+
+set_inlmt_fail:
+ return ret;
+}
+
+static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
+ bool enable)
+{
+ int ret;
+
+ if (enable)
+ ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
+ VBUS_ISPOUT_VBUS_PATH_DIS, 0);
+ else
+ ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
+ VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
+
+ if (ret < 0)
+ dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
+
+
+ return ret;
+}
+
+static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
+ bool enable)
+{
+ int ret;
+
+ if (enable)
+ ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
+ CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
+ else
+ ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
+ CHRG_CCCV_CHG_EN, 0);
+ if (ret < 0)
+ dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
+ else
+ info->is_charger_enabled = enable;
+
+ return ret;
+}
+
+static int axp288_charger_is_present(struct axp288_chrg_info *info)
+{
+ int ret, present = 0;
+ unsigned int val;
+
+ ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
+ if (ret < 0)
+ return ret;
+
+ if (val & PS_STAT_VBUS_PRESENT)
+ present = 1;
+ return present;
+}
+
+static int axp288_charger_is_online(struct axp288_chrg_info *info)
+{
+ int ret, online = 0;
+ unsigned int val;
+
+ ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
+ if (ret < 0)
+ return ret;
+
+ if (val & PS_STAT_VBUS_VALID)
+ online = 1;
+ return online;
+}
+
+static int axp288_get_charger_health(struct axp288_chrg_info *info)
+{
+ int ret, pwr_stat, chrg_stat;
+ int health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ unsigned int val;
+
+ ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
+ if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT))
+ goto health_read_fail;
+ else
+ pwr_stat = val;
+
+ ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val);
+ if (ret < 0)
+ goto health_read_fail;
+ else
+ chrg_stat = val;
+
+ if (!(pwr_stat & PS_STAT_VBUS_VALID))
+ health = POWER_SUPPLY_HEALTH_DEAD;
+ else if (chrg_stat & CHRG_STAT_PMIC_OTP)
+ health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE)
+ health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ else
+ health = POWER_SUPPLY_HEALTH_GOOD;
+
+health_read_fail:
+ return health;
+}
+
+static int axp288_charger_usb_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
+ int ret = 0;
+ int scaled_val;
+
+ mutex_lock(&info->lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ scaled_val = min(val->intval, info->max_cc);
+ scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
+ ret = axp288_charger_set_cc(info, scaled_val);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "set charge current failed\n");
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ scaled_val = min(val->intval, info->max_cv);
+ scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
+ ret = axp288_charger_set_cv(info, scaled_val);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "set charge voltage failed\n");
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int axp288_charger_usb_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
+ int ret = 0;
+
+ mutex_lock(&info->lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ /* Check for OTG case first */
+ if (info->otg.id_short) {
+ val->intval = 0;
+ break;
+ }
+ ret = axp288_charger_is_present(info);
+ if (ret < 0)
+ goto psy_get_prop_fail;
+ info->present = ret;
+ val->intval = info->present;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ /* Check for OTG case first */
+ if (info->otg.id_short) {
+ val->intval = 0;
+ break;
+ }
+ ret = axp288_charger_is_online(info);
+ if (ret < 0)
+ goto psy_get_prop_fail;
+ info->online = ret;
+ val->intval = info->online;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = axp288_get_charger_health(info);
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ val->intval = info->cc * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = info->max_cc * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ val->intval = info->cv * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = info->max_cv * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
+ val->intval = info->inlmt * 1000;
+ break;
+ default:
+ ret = -EINVAL;
+ goto psy_get_prop_fail;
+ }
+
+psy_get_prop_fail:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int axp288_charger_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ ret = 1;
+ break;
+ default:
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property axp288_usb_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
+};
+
+static const struct power_supply_desc axp288_charger_desc = {
+ .name = "axp288_charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = axp288_usb_props,
+ .num_properties = ARRAY_SIZE(axp288_usb_props),
+ .get_property = axp288_charger_usb_get_property,
+ .set_property = axp288_charger_usb_set_property,
+ .property_is_writeable = axp288_charger_property_is_writeable,
+};
+
+static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
+{
+ struct axp288_chrg_info *info = dev;
+ int i;
+
+ for (i = 0; i < CHRG_INTR_END; i++) {
+ if (info->irq[i] == irq)
+ break;
+ }
+
+ if (i >= CHRG_INTR_END) {
+ dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
+ return IRQ_NONE;
+ }
+
+ switch (i) {
+ case VBUS_OV_IRQ:
+ dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
+ break;
+ case CHARGE_DONE_IRQ:
+ dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
+ break;
+ case CHARGE_CHARGING_IRQ:
+ dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
+ break;
+ case BAT_SAFE_QUIT_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Quit Safe Mode(restart timer) Charging IRQ\n");
+ break;
+ case BAT_SAFE_ENTER_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Enter Safe Mode(timer expire) Charging IRQ\n");
+ break;
+ case QCBTU_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Quit Battery Under Temperature(CHRG) INTR\n");
+ break;
+ case CBTU_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Hit Battery Under Temperature(CHRG) INTR\n");
+ break;
+ case QCBTO_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Quit Battery Over Temperature(CHRG) INTR\n");
+ break;
+ case CBTO_IRQ:
+ dev_dbg(&info->pdev->dev,
+ "Hit Battery Over Temperature(CHRG) INTR\n");
+ break;
+ default:
+ dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
+ goto out;
+ }
+
+ power_supply_changed(info->psy_usb);
+out:
+ return IRQ_HANDLED;
+}
+
+static void axp288_charger_extcon_evt_worker(struct work_struct *work)
+{
+ struct axp288_chrg_info *info =
+ container_of(work, struct axp288_chrg_info, cable.work);
+ int ret, current_limit;
+ bool changed = false;
+ struct extcon_dev *edev = info->cable.edev;
+ bool old_connected = info->cable.connected;
+
+ /* Determine cable/charger type */
+ if (extcon_get_cable_state(edev, AXP288_EXTCON_SLOW_CHARGER) > 0) {
+ dev_dbg(&info->pdev->dev, "USB SDP charger is connected");
+ info->cable.connected = true;
+ info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
+ } else if (extcon_get_cable_state(edev,
+ AXP288_EXTCON_DOWNSTREAM_CHARGER) > 0) {
+ dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
+ info->cable.connected = true;
+ info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
+ } else if (extcon_get_cable_state(edev,
+ AXP288_EXTCON_FAST_CHARGER) > 0) {
+ dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
+ info->cable.connected = true;
+ info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
+ } else {
+ if (old_connected)
+ dev_dbg(&info->pdev->dev, "USB charger disconnected");
+ info->cable.connected = false;
+ info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
+ }
+
+ /* Cable status changed */
+ if (old_connected != info->cable.connected)
+ changed = true;
+
+ if (!changed)
+ return;
+
+ mutex_lock(&info->lock);
+
+ if (info->is_charger_enabled && !info->cable.connected) {
+ info->enable_charger = false;
+ ret = axp288_charger_enable_charger(info, info->enable_charger);
+ if (ret < 0)
+ dev_err(&info->pdev->dev,
+ "cannot disable charger (%d)", ret);
+
+ } else if (!info->is_charger_enabled && info->cable.connected) {
+ switch (info->cable.chg_type) {
+ case POWER_SUPPLY_TYPE_USB:
+ current_limit = ILIM_500MA;
+ break;
+ case POWER_SUPPLY_TYPE_USB_CDP:
+ current_limit = ILIM_1500MA;
+ break;
+ case POWER_SUPPLY_TYPE_USB_DCP:
+ current_limit = ILIM_2000MA;
+ break;
+ default:
+ /* Unknown */
+ current_limit = 0;
+ break;
+ }
+
+ /* Set vbus current limit first, then enable charger */
+ ret = axp288_charger_set_vbus_inlmt(info, current_limit);
+ if (ret < 0) {
+ dev_err(&info->pdev->dev,
+ "error setting current limit (%d)", ret);
+ } else {
+ info->enable_charger = (current_limit > 0);
+ ret = axp288_charger_enable_charger(info,
+ info->enable_charger);
+ if (ret < 0)
+ dev_err(&info->pdev->dev,
+ "cannot enable charger (%d)", ret);
+ }
+ }
+
+ if (changed)
+ info->health = axp288_get_charger_health(info);
+
+ mutex_unlock(&info->lock);
+
+ if (changed)
+ power_supply_changed(info->psy_usb);
+}
+
+static int axp288_charger_handle_cable_evt(struct notifier_block *nb,
+ unsigned long event, void *param)
+{
+ struct axp288_chrg_info *info =
+ container_of(nb, struct axp288_chrg_info, cable.nb);
+
+ schedule_work(&info->cable.work);
+
+ return NOTIFY_OK;
+}
+
+static void axp288_charger_otg_evt_worker(struct work_struct *work)
+{
+ struct axp288_chrg_info *info =
+ container_of(work, struct axp288_chrg_info, otg.work);
+ int ret;
+
+ /* Disable VBUS path before enabling the 5V boost */
+ ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "vbus path disable failed\n");
+}
+
+static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
+ unsigned long event, void *param)
+{
+ struct axp288_chrg_info *info =
+ container_of(nb, struct axp288_chrg_info, otg.id_nb);
+ struct extcon_dev *edev = param;
+ int usb_host = extcon_get_cable_state(edev, "USB-Host");
+
+ dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
+ usb_host ? "attached" : "detached");
+
+ /*
+ * Set usb_id_short flag to avoid running charger detection logic
+ * in case usb host.
+ */
+ info->otg.id_short = usb_host;
+ schedule_work(&info->otg.work);
+
+ return NOTIFY_OK;
+}
+
+static void charger_init_hw_regs(struct axp288_chrg_info *info)
+{
+ int ret, cc, cv;
+ unsigned int val;
+
+ /* Program temperature thresholds */
+ ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_V_LTF_CHRG, ret);
+
+ ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_V_HTF_CHRG, ret);
+
+ /* Do not turn-off charger o/p after charge cycle ends */
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_CHRG_CTRL2,
+ CNTL2_CHG_OUT_TURNON, 1);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_CHRG_CTRL2, ret);
+
+ /* Enable interrupts */
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_IRQ2_EN,
+ BAT_IRQ_CFG_BAT_MASK, 1);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_IRQ2_EN, ret);
+
+ ret = regmap_update_bits(info->regmap, AXP20X_IRQ3_EN,
+ TEMP_IRQ_CFG_MASK, 1);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_IRQ3_EN, ret);
+
+ /* Setup ending condition for charging to be 10% of I(chrg) */
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_CHRG_CTRL1,
+ CHRG_CCCV_ITERM_20P, 0);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_CHRG_CTRL1, ret);
+
+ /* Disable OCV-SOC curve calibration */
+ ret = regmap_update_bits(info->regmap,
+ AXP20X_CC_CTRL,
+ FG_CNTL_OCV_ADJ_EN, 0);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev, "register(%x) write error(%d)\n",
+ AXP20X_CC_CTRL, ret);
+
+ /* Init charging current and voltage */
+ info->max_cc = info->pdata->max_cc;
+ info->max_cv = info->pdata->max_cv;
+
+ /* Read current charge voltage and current limit */
+ ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
+ if (ret < 0) {
+ /* Assume default if cannot read */
+ info->cc = info->pdata->def_cc;
+ info->cv = info->pdata->def_cv;
+ } else {
+ /* Determine charge voltage */
+ cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
+ switch (cv) {
+ case CHRG_CCCV_CV_4100MV:
+ info->cv = CV_4100MV;
+ break;
+ case CHRG_CCCV_CV_4150MV:
+ info->cv = CV_4150MV;
+ break;
+ case CHRG_CCCV_CV_4200MV:
+ info->cv = CV_4200MV;
+ break;
+ case CHRG_CCCV_CV_4350MV:
+ info->cv = CV_4350MV;
+ break;
+ default:
+ info->cv = INT_MAX;
+ break;
+ }
+
+ /* Determine charge current limit */
+ cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
+ cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
+ info->cc = cc;
+
+ /* Program default charging voltage and current */
+ cc = min(info->pdata->def_cc, info->max_cc);
+ cv = min(info->pdata->def_cv, info->max_cv);
+
+ ret = axp288_charger_set_cc(info, cc);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev,
+ "error(%d) in setting CC\n", ret);
+
+ ret = axp288_charger_set_cv(info, cv);
+ if (ret < 0)
+ dev_warn(&info->pdev->dev,
+ "error(%d) in setting CV\n", ret);
+ }
+}
+
+static int axp288_charger_probe(struct platform_device *pdev)
+{
+ int ret, i, pirq;
+ struct axp288_chrg_info *info;
+ struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
+ struct power_supply_config charger_cfg = {};
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->pdev = pdev;
+ info->regmap = axp20x->regmap;
+ info->regmap_irqc = axp20x->regmap_irqc;
+ info->pdata = pdev->dev.platform_data;
+
+ if (!info->pdata) {
+ /* Try ACPI provided pdata via device properties */
+ if (!device_property_present(&pdev->dev,
+ "axp288_charger_data\n"))
+ dev_err(&pdev->dev, "failed to get platform data\n");
+ return -ENODEV;
+ }
+
+ info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
+ if (info->cable.edev == NULL) {
+ dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
+ AXP288_EXTCON_DEV_NAME);
+ return -EPROBE_DEFER;
+ }
+
+ /* Register for extcon notification */
+ INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
+ info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;
+ ret = extcon_register_notifier(info->cable.edev, &info->cable.nb);
+ if (ret) {
+ dev_err(&info->pdev->dev,
+ "failed to register extcon notifier %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->lock);
+
+ /* Register with power supply class */
+ charger_cfg.drv_data = info;
+ info->psy_usb = power_supply_register(&pdev->dev, &axp288_charger_desc,
+ &charger_cfg);
+ if (IS_ERR(info->psy_usb)) {
+ dev_err(&pdev->dev, "failed to register power supply charger\n");
+ ret = PTR_ERR(info->psy_usb);
+ goto psy_reg_failed;
+ }
+
+ /* Register for OTG notification */
+ INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
+ info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
+ ret = extcon_register_interest(&info->otg.cable, NULL, "USB-Host",
+ &info->otg.id_nb);
+ if (ret)
+ dev_warn(&pdev->dev, "failed to register otg notifier\n");
+
+ if (info->otg.cable.edev)
+ info->otg.id_short = extcon_get_cable_state(
+ info->otg.cable.edev, "USB-Host");
+
+ /* Register charger interrupts */
+ for (i = 0; i < CHRG_INTR_END; i++) {
+ pirq = platform_get_irq(info->pdev, i);
+ info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
+ if (info->irq[i] < 0) {
+ dev_warn(&info->pdev->dev,
+ "failed to get virtual interrupt=%d\n", pirq);
+ ret = info->irq[i];
+ goto intr_reg_failed;
+ }
+ ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
+ NULL, axp288_charger_irq_thread_handler,
+ IRQF_ONESHOT, info->pdev->name, info);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request interrupt=%d\n",
+ info->irq[i]);
+ goto intr_reg_failed;
+ }
+ }
+
+ charger_init_hw_regs(info);
+
+ return 0;
+
+intr_reg_failed:
+ if (info->otg.cable.edev)
+ extcon_unregister_interest(&info->otg.cable);
+ power_supply_unregister(info->psy_usb);
+psy_reg_failed:
+ extcon_unregister_notifier(info->cable.edev, &info->cable.nb);
+ return ret;
+}
+
+static int axp288_charger_remove(struct platform_device *pdev)
+{
+ struct axp288_chrg_info *info = dev_get_drvdata(&pdev->dev);
+
+ if (info->otg.cable.edev)
+ extcon_unregister_interest(&info->otg.cable);
+
+ extcon_unregister_notifier(info->cable.edev, &info->cable.nb);
+ power_supply_unregister(info->psy_usb);
+
+ return 0;
+}
+
+static struct platform_driver axp288_charger_driver = {
+ .probe = axp288_charger_probe,
+ .remove = axp288_charger_remove,
+ .driver = {
+ .name = "axp288_charger",
+ },
+};
+
+module_platform_driver(axp288_charger_driver);
+
+MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
+MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
+MODULE_LICENSE("GPL v2");
return ret;
}
-static struct platform_device_id axp288_fg_id_table[] = {
+static const struct platform_device_id axp288_fg_id_table[] = {
{ .name = DEV_NAME },
{},
};
#include <linux/idr.h>
#include <linux/i2c.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
#include <linux/power/bq2415x_charger.h>
int val;
if (bq->init_data.resistor_sense <= 0)
- return -ENOSYS;
+ return -EINVAL;
val = (mA * bq->init_data.resistor_sense - 37400) / 6800;
if (val < 0)
int ret;
if (bq->init_data.resistor_sense <= 0)
- return -ENOSYS;
+ return -EINVAL;
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
BQ2415X_MASK_VI_CHRG, BQ2415X_SHIFT_VI_CHRG);
int val;
if (bq->init_data.resistor_sense <= 0)
- return -ENOSYS;
+ return -EINVAL;
val = (mA * bq->init_data.resistor_sense - 3400) / 3400;
if (val < 0)
int ret;
if (bq->init_data.resistor_sense <= 0)
- return -ENOSYS;
+ return -EINVAL;
ret = bq2415x_i2c_read_mask(bq, BQ2415X_REG_CURRENT,
BQ2415X_MASK_VI_TERM, BQ2415X_SHIFT_VI_TERM);
if (strncmp(buf, "auto", 4) == 0) {
if (bq->automode < 0)
- return -ENOSYS;
+ return -EINVAL;
bq->automode = 1;
mode = bq->reported_mode;
} else if (strncmp(buf, "off", 3) == 0) {
{
int ret;
int num;
- char *name;
+ char *name = NULL;
struct bq2415x_device *bq;
struct device_node *np = client->dev.of_node;
struct bq2415x_platform_data *pdata = client->dev.platform_data;
+ const struct acpi_device_id *acpi_id = NULL;
- if (!np && !pdata) {
- dev_err(&client->dev, "platform data missing\n");
+ if (!np && !pdata && !ACPI_HANDLE(&client->dev)) {
+ dev_err(&client->dev, "Neither devicetree, nor platform data, nor ACPI support\n");
return -ENODEV;
}
if (num < 0)
return num;
- name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
+ if (id) {
+ name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
+ } else if (ACPI_HANDLE(&client->dev)) {
+ acpi_id =
+ acpi_match_device(client->dev.driver->acpi_match_table,
+ &client->dev);
+ name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
+ }
if (!name) {
dev_err(&client->dev, "failed to allocate device name\n");
ret = -ENOMEM;
bq = devm_kzalloc(&client->dev, sizeof(*bq), GFP_KERNEL);
if (!bq) {
- dev_err(&client->dev, "failed to allocate device data\n");
ret = -ENOMEM;
goto error_2;
}
if (np) {
- bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection");
+ bq->notify_psy = power_supply_get_by_phandle(np,
+ "ti,usb-charger-detection");
if (IS_ERR(bq->notify_psy)) {
dev_info(&client->dev,
- "no 'ti,usb-charger-detection' property (err=%ld)\n",
+ "no 'ti,usb-charger-detection' property (err=%ld)\n",
PTR_ERR(bq->notify_psy));
bq->notify_psy = NULL;
} else if (!bq->notify_psy) {
ret = -EPROBE_DEFER;
goto error_2;
}
- }
- else if (pdata->notify_device)
+ } else if (pdata && pdata->notify_device) {
bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
- else
+ } else {
bq->notify_psy = NULL;
+ }
i2c_set_clientdata(client, bq);
bq->id = num;
bq->dev = &client->dev;
- bq->chip = id->driver_data;
+ if (id)
+ bq->chip = id->driver_data;
+ else if (ACPI_HANDLE(bq->dev))
+ bq->chip = acpi_id->driver_data;
bq->name = name;
bq->mode = BQ2415X_MODE_OFF;
bq->reported_mode = BQ2415X_MODE_OFF;
bq->autotimer = 0;
bq->automode = 0;
- if (np) {
- ret = of_property_read_u32(np, "ti,current-limit",
- &bq->init_data.current_limit);
+ if (np || ACPI_HANDLE(bq->dev)) {
+ ret = device_property_read_u32(bq->dev,
+ "ti,current-limit",
+ &bq->init_data.current_limit);
if (ret)
goto error_3;
- ret = of_property_read_u32(np, "ti,weak-battery-voltage",
- &bq->init_data.weak_battery_voltage);
+ ret = device_property_read_u32(bq->dev,
+ "ti,weak-battery-voltage",
+ &bq->init_data.weak_battery_voltage);
if (ret)
goto error_3;
- ret = of_property_read_u32(np, "ti,battery-regulation-voltage",
+ ret = device_property_read_u32(bq->dev,
+ "ti,battery-regulation-voltage",
&bq->init_data.battery_regulation_voltage);
if (ret)
goto error_3;
- ret = of_property_read_u32(np, "ti,charge-current",
- &bq->init_data.charge_current);
+ ret = device_property_read_u32(bq->dev,
+ "ti,charge-current",
+ &bq->init_data.charge_current);
if (ret)
goto error_3;
- ret = of_property_read_u32(np, "ti,termination-current",
+ ret = device_property_read_u32(bq->dev,
+ "ti,termination-current",
&bq->init_data.termination_current);
if (ret)
goto error_3;
- ret = of_property_read_u32(np, "ti,resistor-sense",
- &bq->init_data.resistor_sense);
+ ret = device_property_read_u32(bq->dev,
+ "ti,resistor-sense",
+ &bq->init_data.resistor_sense);
if (ret)
goto error_3;
} else {
}
/* Query for initial reported_mode and set it */
- bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy);
+ bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED,
+ bq->notify_psy);
bq2415x_set_mode(bq, bq->reported_mode);
bq->automode = 1;
};
MODULE_DEVICE_TABLE(i2c, bq2415x_i2c_id_table);
+static const struct acpi_device_id bq2415x_i2c_acpi_match[] = {
+ { "BQ2415X", BQUNKNOWN },
+ { "BQ241500", BQ24150 },
+ { "BQA24150", BQ24150A },
+ { "BQ241510", BQ24151 },
+ { "BQA24151", BQ24151A },
+ { "BQ241520", BQ24152 },
+ { "BQ241530", BQ24153 },
+ { "BQA24153", BQ24153A },
+ { "BQ241550", BQ24155 },
+ { "BQ241560", BQ24156 },
+ { "BQA24156", BQ24156A },
+ { "BQS24157", BQ24157S },
+ { "BQ241580", BQ24158 },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, bq2415x_i2c_acpi_match);
+
static struct i2c_driver bq2415x_driver = {
.driver = {
.name = "bq2415x-charger",
+ .acpi_match_table = ACPI_PTR(bq2415x_i2c_acpi_match),
},
.probe = bq2415x_probe,
.remove = bq2415x_remove,
* register reset so we should ignore that one (the very first
* interrupt received).
*/
- if (alert_userspace && !bdi->first_time) {
- power_supply_changed(bdi->charger);
- power_supply_changed(bdi->battery);
- bdi->first_time = false;
+ if (alert_userspace) {
+ if (!bdi->first_time) {
+ power_supply_changed(bdi->charger);
+ power_supply_changed(bdi->battery);
+ } else {
+ bdi->first_time = false;
+ }
}
out:
--- /dev/null
+/*
+ * TI BQ24257 charger driver
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+
+#include <linux/acpi.h>
+#include <linux/of.h>
+
+#define BQ24257_REG_1 0x00
+#define BQ24257_REG_2 0x01
+#define BQ24257_REG_3 0x02
+#define BQ24257_REG_4 0x03
+#define BQ24257_REG_5 0x04
+#define BQ24257_REG_6 0x05
+#define BQ24257_REG_7 0x06
+
+#define BQ24257_MANUFACTURER "Texas Instruments"
+#define BQ24257_STAT_IRQ "stat"
+#define BQ24257_PG_GPIO "pg"
+
+#define BQ24257_ILIM_SET_DELAY 1000 /* msec */
+
+enum bq24257_fields {
+ F_WD_FAULT, F_WD_EN, F_STAT, F_FAULT, /* REG 1 */
+ F_RESET, F_IILIMIT, F_EN_STAT, F_EN_TERM, F_CE, F_HZ_MODE, /* REG 2 */
+ F_VBAT, F_USB_DET, /* REG 3 */
+ F_ICHG, F_ITERM, /* REG 4 */
+ F_LOOP_STATUS, F_LOW_CHG, F_DPDM_EN, F_CE_STATUS, F_VINDPM, /* REG 5 */
+ F_X2_TMR_EN, F_TMR, F_SYSOFF, F_TS_STAT, /* REG 6 */
+ F_VOVP, F_CLR_VDP, F_FORCE_BATDET, F_FORCE_PTM, /* REG 7 */
+
+ F_MAX_FIELDS
+};
+
+/* initial field values, converted from uV/uA */
+struct bq24257_init_data {
+ u8 ichg; /* charge current */
+ u8 vbat; /* regulation voltage */
+ u8 iterm; /* termination current */
+};
+
+struct bq24257_state {
+ u8 status;
+ u8 fault;
+ bool power_good;
+};
+
+struct bq24257_device {
+ struct i2c_client *client;
+ struct device *dev;
+ struct power_supply *charger;
+
+ struct regmap *rmap;
+ struct regmap_field *rmap_fields[F_MAX_FIELDS];
+
+ struct gpio_desc *pg;
+
+ struct delayed_work iilimit_setup_work;
+
+ struct bq24257_init_data init_data;
+ struct bq24257_state state;
+
+ struct mutex lock; /* protect state data */
+};
+
+static bool bq24257_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case BQ24257_REG_2:
+ case BQ24257_REG_4:
+ return false;
+
+ default:
+ return true;
+ }
+}
+
+static const struct regmap_config bq24257_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = BQ24257_REG_7,
+ .cache_type = REGCACHE_RBTREE,
+
+ .volatile_reg = bq24257_is_volatile_reg,
+};
+
+static const struct reg_field bq24257_reg_fields[] = {
+ /* REG 1 */
+ [F_WD_FAULT] = REG_FIELD(BQ24257_REG_1, 7, 7),
+ [F_WD_EN] = REG_FIELD(BQ24257_REG_1, 6, 6),
+ [F_STAT] = REG_FIELD(BQ24257_REG_1, 4, 5),
+ [F_FAULT] = REG_FIELD(BQ24257_REG_1, 0, 3),
+ /* REG 2 */
+ [F_RESET] = REG_FIELD(BQ24257_REG_2, 7, 7),
+ [F_IILIMIT] = REG_FIELD(BQ24257_REG_2, 4, 6),
+ [F_EN_STAT] = REG_FIELD(BQ24257_REG_2, 3, 3),
+ [F_EN_TERM] = REG_FIELD(BQ24257_REG_2, 2, 2),
+ [F_CE] = REG_FIELD(BQ24257_REG_2, 1, 1),
+ [F_HZ_MODE] = REG_FIELD(BQ24257_REG_2, 0, 0),
+ /* REG 3 */
+ [F_VBAT] = REG_FIELD(BQ24257_REG_3, 2, 7),
+ [F_USB_DET] = REG_FIELD(BQ24257_REG_3, 0, 1),
+ /* REG 4 */
+ [F_ICHG] = REG_FIELD(BQ24257_REG_4, 3, 7),
+ [F_ITERM] = REG_FIELD(BQ24257_REG_4, 0, 2),
+ /* REG 5 */
+ [F_LOOP_STATUS] = REG_FIELD(BQ24257_REG_5, 6, 7),
+ [F_LOW_CHG] = REG_FIELD(BQ24257_REG_5, 5, 5),
+ [F_DPDM_EN] = REG_FIELD(BQ24257_REG_5, 4, 4),
+ [F_CE_STATUS] = REG_FIELD(BQ24257_REG_5, 3, 3),
+ [F_VINDPM] = REG_FIELD(BQ24257_REG_5, 0, 2),
+ /* REG 6 */
+ [F_X2_TMR_EN] = REG_FIELD(BQ24257_REG_6, 7, 7),
+ [F_TMR] = REG_FIELD(BQ24257_REG_6, 5, 6),
+ [F_SYSOFF] = REG_FIELD(BQ24257_REG_6, 4, 4),
+ [F_TS_STAT] = REG_FIELD(BQ24257_REG_6, 0, 2),
+ /* REG 7 */
+ [F_VOVP] = REG_FIELD(BQ24257_REG_7, 5, 7),
+ [F_CLR_VDP] = REG_FIELD(BQ24257_REG_7, 4, 4),
+ [F_FORCE_BATDET] = REG_FIELD(BQ24257_REG_7, 3, 3),
+ [F_FORCE_PTM] = REG_FIELD(BQ24257_REG_7, 2, 2)
+};
+
+static const u32 bq24257_vbat_map[] = {
+ 3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000,
+ 3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000,
+ 3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000,
+ 3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000,
+ 4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000,
+ 4300000, 4320000, 4340000, 4360000, 4380000, 4400000, 4420000, 4440000
+};
+
+#define BQ24257_VBAT_MAP_SIZE ARRAY_SIZE(bq24257_vbat_map)
+
+static const u32 bq24257_ichg_map[] = {
+ 500000, 550000, 600000, 650000, 700000, 750000, 800000, 850000, 900000,
+ 950000, 1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000,
+ 1350000, 1400000, 1450000, 1500000, 1550000, 1600000, 1650000, 1700000,
+ 1750000, 1800000, 1850000, 1900000, 1950000, 2000000
+};
+
+#define BQ24257_ICHG_MAP_SIZE ARRAY_SIZE(bq24257_ichg_map)
+
+static const u32 bq24257_iterm_map[] = {
+ 50000, 75000, 100000, 125000, 150000, 175000, 200000, 225000
+};
+
+#define BQ24257_ITERM_MAP_SIZE ARRAY_SIZE(bq24257_iterm_map)
+
+static int bq24257_field_read(struct bq24257_device *bq,
+ enum bq24257_fields field_id)
+{
+ int ret;
+ int val;
+
+ ret = regmap_field_read(bq->rmap_fields[field_id], &val);
+ if (ret < 0)
+ return ret;
+
+ return val;
+}
+
+static int bq24257_field_write(struct bq24257_device *bq,
+ enum bq24257_fields field_id, u8 val)
+{
+ return regmap_field_write(bq->rmap_fields[field_id], val);
+}
+
+static u8 bq24257_find_idx(u32 value, const u32 *map, u8 map_size)
+{
+ u8 idx;
+
+ for (idx = 1; idx < map_size; idx++)
+ if (value < map[idx])
+ break;
+
+ return idx - 1;
+}
+
+enum bq24257_status {
+ STATUS_READY,
+ STATUS_CHARGE_IN_PROGRESS,
+ STATUS_CHARGE_DONE,
+ STATUS_FAULT,
+};
+
+enum bq24257_fault {
+ FAULT_NORMAL,
+ FAULT_INPUT_OVP,
+ FAULT_INPUT_UVLO,
+ FAULT_SLEEP,
+ FAULT_BAT_TS,
+ FAULT_BAT_OVP,
+ FAULT_TS,
+ FAULT_TIMER,
+ FAULT_NO_BAT,
+ FAULT_ISET,
+ FAULT_INPUT_LDO_LOW,
+};
+
+static int bq24257_power_supply_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct bq24257_device *bq = power_supply_get_drvdata(psy);
+ struct bq24257_state state;
+
+ mutex_lock(&bq->lock);
+ state = bq->state;
+ mutex_unlock(&bq->lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!state.power_good)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (state.status == STATUS_READY)
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ else if (state.status == STATUS_CHARGE_IN_PROGRESS)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (state.status == STATUS_CHARGE_DONE)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = BQ24257_MANUFACTURER;
+ break;
+
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = state.power_good;
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ switch (state.fault) {
+ case FAULT_NORMAL:
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+
+ case FAULT_INPUT_OVP:
+ case FAULT_BAT_OVP:
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+
+ case FAULT_TS:
+ case FAULT_BAT_TS:
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ break;
+
+ case FAULT_TIMER:
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ break;
+
+ default:
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ }
+
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ val->intval = bq24257_ichg_map[bq->init_data.ichg];
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = bq24257_ichg_map[BQ24257_ICHG_MAP_SIZE - 1];
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ val->intval = bq24257_vbat_map[bq->init_data.vbat];
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = bq24257_vbat_map[BQ24257_VBAT_MAP_SIZE - 1];
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ val->intval = bq24257_iterm_map[bq->init_data.iterm];
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int bq24257_get_chip_state(struct bq24257_device *bq,
+ struct bq24257_state *state)
+{
+ int ret;
+
+ ret = bq24257_field_read(bq, F_STAT);
+ if (ret < 0)
+ return ret;
+
+ state->status = ret;
+
+ ret = bq24257_field_read(bq, F_FAULT);
+ if (ret < 0)
+ return ret;
+
+ state->fault = ret;
+
+ state->power_good = !gpiod_get_value_cansleep(bq->pg);
+
+ return 0;
+}
+
+static bool bq24257_state_changed(struct bq24257_device *bq,
+ struct bq24257_state *new_state)
+{
+ int ret;
+
+ mutex_lock(&bq->lock);
+ ret = (bq->state.status != new_state->status ||
+ bq->state.fault != new_state->fault ||
+ bq->state.power_good != new_state->power_good);
+ mutex_unlock(&bq->lock);
+
+ return ret;
+}
+
+enum bq24257_loop_status {
+ LOOP_STATUS_NONE,
+ LOOP_STATUS_IN_DPM,
+ LOOP_STATUS_IN_CURRENT_LIMIT,
+ LOOP_STATUS_THERMAL,
+};
+
+enum bq24257_in_ilimit {
+ IILIMIT_100,
+ IILIMIT_150,
+ IILIMIT_500,
+ IILIMIT_900,
+ IILIMIT_1500,
+ IILIMIT_2000,
+ IILIMIT_EXT,
+ IILIMIT_NONE,
+};
+
+enum bq24257_port_type {
+ PORT_TYPE_DCP, /* Dedicated Charging Port */
+ PORT_TYPE_CDP, /* Charging Downstream Port */
+ PORT_TYPE_SDP, /* Standard Downstream Port */
+ PORT_TYPE_NON_STANDARD,
+};
+
+enum bq24257_safety_timer {
+ SAFETY_TIMER_45,
+ SAFETY_TIMER_360,
+ SAFETY_TIMER_540,
+ SAFETY_TIMER_NONE,
+};
+
+static int bq24257_iilimit_autoset(struct bq24257_device *bq)
+{
+ int loop_status;
+ int iilimit;
+ int port_type;
+ int ret;
+ const u8 new_iilimit[] = {
+ [PORT_TYPE_DCP] = IILIMIT_2000,
+ [PORT_TYPE_CDP] = IILIMIT_2000,
+ [PORT_TYPE_SDP] = IILIMIT_500,
+ [PORT_TYPE_NON_STANDARD] = IILIMIT_500
+ };
+
+ ret = bq24257_field_read(bq, F_LOOP_STATUS);
+ if (ret < 0)
+ goto error;
+
+ loop_status = ret;
+
+ ret = bq24257_field_read(bq, F_IILIMIT);
+ if (ret < 0)
+ goto error;
+
+ iilimit = ret;
+
+ /*
+ * All USB ports should be able to handle 500mA. If not, DPM will lower
+ * the charging current to accommodate the power source. No need to set
+ * a lower IILIMIT value.
+ */
+ if (loop_status == LOOP_STATUS_IN_DPM && iilimit == IILIMIT_500)
+ return 0;
+
+ ret = bq24257_field_read(bq, F_USB_DET);
+ if (ret < 0)
+ goto error;
+
+ port_type = ret;
+
+ ret = bq24257_field_write(bq, F_IILIMIT, new_iilimit[port_type]);
+ if (ret < 0)
+ goto error;
+
+ ret = bq24257_field_write(bq, F_TMR, SAFETY_TIMER_360);
+ if (ret < 0)
+ goto error;
+
+ ret = bq24257_field_write(bq, F_CLR_VDP, 1);
+ if (ret < 0)
+ goto error;
+
+ dev_dbg(bq->dev, "port/loop = %d/%d -> iilimit = %d\n",
+ port_type, loop_status, new_iilimit[port_type]);
+
+ return 0;
+
+error:
+ dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__);
+ return ret;
+}
+
+static void bq24257_iilimit_setup_work(struct work_struct *work)
+{
+ struct bq24257_device *bq = container_of(work, struct bq24257_device,
+ iilimit_setup_work.work);
+
+ bq24257_iilimit_autoset(bq);
+}
+
+static void bq24257_handle_state_change(struct bq24257_device *bq,
+ struct bq24257_state *new_state)
+{
+ int ret;
+ struct bq24257_state old_state;
+ bool reset_iilimit = false;
+ bool config_iilimit = false;
+
+ mutex_lock(&bq->lock);
+ old_state = bq->state;
+ mutex_unlock(&bq->lock);
+
+ if (!new_state->power_good) { /* power removed */
+ cancel_delayed_work_sync(&bq->iilimit_setup_work);
+
+ /* activate D+/D- port detection algorithm */
+ ret = bq24257_field_write(bq, F_DPDM_EN, 1);
+ if (ret < 0)
+ goto error;
+
+ reset_iilimit = true;
+ } else if (!old_state.power_good) { /* power inserted */
+ config_iilimit = true;
+ } else if (new_state->fault == FAULT_NO_BAT) { /* battery removed */
+ cancel_delayed_work_sync(&bq->iilimit_setup_work);
+
+ reset_iilimit = true;
+ } else if (old_state.fault == FAULT_NO_BAT) { /* battery connected */
+ config_iilimit = true;
+ } else if (new_state->fault == FAULT_TIMER) { /* safety timer expired */
+ dev_err(bq->dev, "Safety timer expired! Battery dead?\n");
+ }
+
+ if (reset_iilimit) {
+ ret = bq24257_field_write(bq, F_IILIMIT, IILIMIT_500);
+ if (ret < 0)
+ goto error;
+ } else if (config_iilimit) {
+ schedule_delayed_work(&bq->iilimit_setup_work,
+ msecs_to_jiffies(BQ24257_ILIM_SET_DELAY));
+ }
+
+ return;
+
+error:
+ dev_err(bq->dev, "%s: Error communicating with the chip.\n", __func__);
+}
+
+static irqreturn_t bq24257_irq_handler_thread(int irq, void *private)
+{
+ int ret;
+ struct bq24257_device *bq = private;
+ struct bq24257_state state;
+
+ ret = bq24257_get_chip_state(bq, &state);
+ if (ret < 0)
+ return IRQ_HANDLED;
+
+ if (!bq24257_state_changed(bq, &state))
+ return IRQ_HANDLED;
+
+ dev_dbg(bq->dev, "irq(state changed): status/fault/pg = %d/%d/%d\n",
+ state.status, state.fault, state.power_good);
+
+ bq24257_handle_state_change(bq, &state);
+
+ mutex_lock(&bq->lock);
+ bq->state = state;
+ mutex_unlock(&bq->lock);
+
+ power_supply_changed(bq->charger);
+
+ return IRQ_HANDLED;
+}
+
+static int bq24257_hw_init(struct bq24257_device *bq)
+{
+ int ret;
+ int i;
+ struct bq24257_state state;
+
+ const struct {
+ int field;
+ u32 value;
+ } init_data[] = {
+ {F_ICHG, bq->init_data.ichg},
+ {F_VBAT, bq->init_data.vbat},
+ {F_ITERM, bq->init_data.iterm}
+ };
+
+ /*
+ * Disable the watchdog timer to prevent the IC from going back to
+ * default settings after 50 seconds of I2C inactivity.
+ */
+ ret = bq24257_field_write(bq, F_WD_EN, 0);
+ if (ret < 0)
+ return ret;
+
+ /* configure the charge currents and voltages */
+ for (i = 0; i < ARRAY_SIZE(init_data); i++) {
+ ret = bq24257_field_write(bq, init_data[i].field,
+ init_data[i].value);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = bq24257_get_chip_state(bq, &state);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&bq->lock);
+ bq->state = state;
+ mutex_unlock(&bq->lock);
+
+ if (!state.power_good)
+ /* activate D+/D- detection algorithm */
+ ret = bq24257_field_write(bq, F_DPDM_EN, 1);
+ else if (state.fault != FAULT_NO_BAT)
+ ret = bq24257_iilimit_autoset(bq);
+
+ return ret;
+}
+
+static enum power_supply_property bq24257_power_supply_props[] = {
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+};
+
+static char *bq24257_charger_supplied_to[] = {
+ "main-battery",
+};
+
+static const struct power_supply_desc bq24257_power_supply_desc = {
+ .name = "bq24257-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = bq24257_power_supply_props,
+ .num_properties = ARRAY_SIZE(bq24257_power_supply_props),
+ .get_property = bq24257_power_supply_get_property,
+};
+
+static int bq24257_power_supply_init(struct bq24257_device *bq)
+{
+ struct power_supply_config psy_cfg = { .drv_data = bq, };
+
+ psy_cfg.supplied_to = bq24257_charger_supplied_to;
+ psy_cfg.num_supplicants = ARRAY_SIZE(bq24257_charger_supplied_to);
+
+ bq->charger = power_supply_register(bq->dev, &bq24257_power_supply_desc,
+ &psy_cfg);
+ if (IS_ERR(bq->charger))
+ return PTR_ERR(bq->charger);
+
+ return 0;
+}
+
+static int bq24257_irq_probe(struct bq24257_device *bq)
+{
+ struct gpio_desc *stat_irq;
+
+ stat_irq = devm_gpiod_get_index(bq->dev, BQ24257_STAT_IRQ, 0, GPIOD_IN);
+ if (IS_ERR(stat_irq)) {
+ dev_err(bq->dev, "could not probe stat_irq pin\n");
+ return PTR_ERR(stat_irq);
+ }
+
+ return gpiod_to_irq(stat_irq);
+}
+
+static int bq24257_pg_gpio_probe(struct bq24257_device *bq)
+{
+ bq->pg = devm_gpiod_get_index(bq->dev, BQ24257_PG_GPIO, 0, GPIOD_IN);
+ if (IS_ERR(bq->pg)) {
+ dev_err(bq->dev, "could not probe PG pin\n");
+ return PTR_ERR(bq->pg);
+ }
+
+ return 0;
+}
+
+static int bq24257_fw_probe(struct bq24257_device *bq)
+{
+ int ret;
+ u32 property;
+
+ ret = device_property_read_u32(bq->dev, "ti,charge-current", &property);
+ if (ret < 0)
+ return ret;
+
+ bq->init_data.ichg = bq24257_find_idx(property, bq24257_ichg_map,
+ BQ24257_ICHG_MAP_SIZE);
+
+ ret = device_property_read_u32(bq->dev, "ti,battery-regulation-voltage",
+ &property);
+ if (ret < 0)
+ return ret;
+
+ bq->init_data.vbat = bq24257_find_idx(property, bq24257_vbat_map,
+ BQ24257_VBAT_MAP_SIZE);
+
+ ret = device_property_read_u32(bq->dev, "ti,termination-current",
+ &property);
+ if (ret < 0)
+ return ret;
+
+ bq->init_data.iterm = bq24257_find_idx(property, bq24257_iterm_map,
+ BQ24257_ITERM_MAP_SIZE);
+
+ return 0;
+}
+
+static int bq24257_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct device *dev = &client->dev;
+ struct bq24257_device *bq;
+ int ret;
+ int i;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
+ return -ENODEV;
+ }
+
+ bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
+ if (!bq)
+ return -ENOMEM;
+
+ bq->client = client;
+ bq->dev = dev;
+
+ mutex_init(&bq->lock);
+
+ bq->rmap = devm_regmap_init_i2c(client, &bq24257_regmap_config);
+ if (IS_ERR(bq->rmap)) {
+ dev_err(dev, "failed to allocate register map\n");
+ return PTR_ERR(bq->rmap);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bq24257_reg_fields); i++) {
+ const struct reg_field *reg_fields = bq24257_reg_fields;
+
+ bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
+ reg_fields[i]);
+ if (IS_ERR(bq->rmap_fields[i])) {
+ dev_err(dev, "cannot allocate regmap field\n");
+ return PTR_ERR(bq->rmap_fields[i]);
+ }
+ }
+
+ i2c_set_clientdata(client, bq);
+
+ INIT_DELAYED_WORK(&bq->iilimit_setup_work, bq24257_iilimit_setup_work);
+
+ if (!dev->platform_data) {
+ ret = bq24257_fw_probe(bq);
+ if (ret < 0) {
+ dev_err(dev, "Cannot read device properties.\n");
+ return ret;
+ }
+ } else {
+ return -ENODEV;
+ }
+
+ /* we can only check Power Good status by probing the PG pin */
+ ret = bq24257_pg_gpio_probe(bq);
+ if (ret < 0)
+ return ret;
+
+ /* reset all registers to defaults */
+ ret = bq24257_field_write(bq, F_RESET, 1);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Put the RESET bit back to 0, in cache. For some reason the HW always
+ * returns 1 on this bit, so this is the only way to avoid resetting the
+ * chip every time we update another field in this register.
+ */
+ ret = bq24257_field_write(bq, F_RESET, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = bq24257_hw_init(bq);
+ if (ret < 0) {
+ dev_err(dev, "Cannot initialize the chip.\n");
+ return ret;
+ }
+
+ if (client->irq <= 0)
+ client->irq = bq24257_irq_probe(bq);
+
+ if (client->irq < 0) {
+ dev_err(dev, "no irq resource found\n");
+ return client->irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ bq24257_irq_handler_thread,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ BQ24257_STAT_IRQ, bq);
+ if (ret)
+ return ret;
+
+ ret = bq24257_power_supply_init(bq);
+ if (ret < 0)
+ dev_err(dev, "Failed to register power supply\n");
+
+ return ret;
+}
+
+static int bq24257_remove(struct i2c_client *client)
+{
+ struct bq24257_device *bq = i2c_get_clientdata(client);
+
+ cancel_delayed_work_sync(&bq->iilimit_setup_work);
+
+ power_supply_unregister(bq->charger);
+
+ bq24257_field_write(bq, F_RESET, 1); /* reset to defaults */
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bq24257_suspend(struct device *dev)
+{
+ struct bq24257_device *bq = dev_get_drvdata(dev);
+ int ret = 0;
+
+ cancel_delayed_work_sync(&bq->iilimit_setup_work);
+
+ /* reset all registers to default (and activate standalone mode) */
+ ret = bq24257_field_write(bq, F_RESET, 1);
+ if (ret < 0)
+ dev_err(bq->dev, "Cannot reset chip to standalone mode.\n");
+
+ return ret;
+}
+
+static int bq24257_resume(struct device *dev)
+{
+ int ret;
+ struct bq24257_device *bq = dev_get_drvdata(dev);
+
+ ret = regcache_drop_region(bq->rmap, BQ24257_REG_1, BQ24257_REG_7);
+ if (ret < 0)
+ return ret;
+
+ ret = bq24257_field_write(bq, F_RESET, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = bq24257_hw_init(bq);
+ if (ret < 0) {
+ dev_err(bq->dev, "Cannot init chip after resume.\n");
+ return ret;
+ }
+
+ /* signal userspace, maybe state changed while suspended */
+ power_supply_changed(bq->charger);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops bq24257_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(bq24257_suspend, bq24257_resume)
+};
+
+static const struct i2c_device_id bq24257_i2c_ids[] = {
+ { "bq24257", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, bq24257_i2c_ids);
+
+static const struct of_device_id bq24257_of_match[] = {
+ { .compatible = "ti,bq24257", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bq24257_of_match);
+
+static const struct acpi_device_id bq24257_acpi_match[] = {
+ {"BQ242570", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, bq24257_acpi_match);
+
+static struct i2c_driver bq24257_driver = {
+ .driver = {
+ .name = "bq24257-charger",
+ .of_match_table = of_match_ptr(bq24257_of_match),
+ .acpi_match_table = ACPI_PTR(bq24257_acpi_match),
+ .pm = &bq24257_pm,
+ },
+ .probe = bq24257_probe,
+ .remove = bq24257_remove,
+ .id_table = bq24257_i2c_ids,
+};
+module_i2c_driver(bq24257_driver);
+
+MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
+MODULE_DESCRIPTION("bq24257 charger driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * TI BQ25890 charger driver
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/usb/phy.h>
+
+#include <linux/acpi.h>
+#include <linux/of.h>
+
+#define BQ25890_MANUFACTURER "Texas Instruments"
+#define BQ25890_IRQ_PIN "bq25890_irq"
+
+#define BQ25890_ID 3
+
+enum bq25890_fields {
+ F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
+ F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
+ F_CONV_START, F_CONV_RATE, F_BOOSTF, F_ICO_EN,
+ F_HVDCP_EN, F_MAXC_EN, F_FORCE_DPM, F_AUTO_DPDM_EN, /* Reg02 */
+ F_BAT_LOAD_EN, F_WD_RST, F_OTG_CFG, F_CHG_CFG, F_SYSVMIN, /* Reg03 */
+ F_PUMPX_EN, F_ICHG, /* Reg04 */
+ F_IPRECHG, F_ITERM, /* Reg05 */
+ F_VREG, F_BATLOWV, F_VRECHG, /* Reg06 */
+ F_TERM_EN, F_STAT_DIS, F_WD, F_TMR_EN, F_CHG_TMR,
+ F_JEITA_ISET, /* Reg07 */
+ F_BATCMP, F_VCLAMP, F_TREG, /* Reg08 */
+ F_FORCE_ICO, F_TMR2X_EN, F_BATFET_DIS, F_JEITA_VSET,
+ F_BATFET_DLY, F_BATFET_RST_EN, F_PUMPX_UP, F_PUMPX_DN, /* Reg09 */
+ F_BOOSTV, F_BOOSTI, /* Reg0A */
+ F_VBUS_STAT, F_CHG_STAT, F_PG_STAT, F_SDP_STAT, F_VSYS_STAT, /* Reg0B */
+ F_WD_FAULT, F_BOOST_FAULT, F_CHG_FAULT, F_BAT_FAULT,
+ F_NTC_FAULT, /* Reg0C */
+ F_FORCE_VINDPM, F_VINDPM, /* Reg0D */
+ F_THERM_STAT, F_BATV, /* Reg0E */
+ F_SYSV, /* Reg0F */
+ F_TSPCT, /* Reg10 */
+ F_VBUS_GD, F_VBUSV, /* Reg11 */
+ F_ICHGR, /* Reg12 */
+ F_VDPM_STAT, F_IDPM_STAT, F_IDPM_LIM, /* Reg13 */
+ F_REG_RST, F_ICO_OPTIMIZED, F_PN, F_TS_PROFILE, F_DEV_REV, /* Reg14 */
+
+ F_MAX_FIELDS
+};
+
+/* initial field values, converted to register values */
+struct bq25890_init_data {
+ u8 ichg; /* charge current */
+ u8 vreg; /* regulation voltage */
+ u8 iterm; /* termination current */
+ u8 iprechg; /* precharge current */
+ u8 sysvmin; /* minimum system voltage limit */
+ u8 boostv; /* boost regulation voltage */
+ u8 boosti; /* boost current limit */
+ u8 boostf; /* boost frequency */
+ u8 ilim_en; /* enable ILIM pin */
+ u8 treg; /* thermal regulation threshold */
+};
+
+struct bq25890_state {
+ u8 online;
+ u8 chrg_status;
+ u8 chrg_fault;
+ u8 vsys_status;
+ u8 boost_fault;
+ u8 bat_fault;
+};
+
+struct bq25890_device {
+ struct i2c_client *client;
+ struct device *dev;
+ struct power_supply *charger;
+
+ struct usb_phy *usb_phy;
+ struct notifier_block usb_nb;
+ struct work_struct usb_work;
+ unsigned long usb_event;
+
+ struct regmap *rmap;
+ struct regmap_field *rmap_fields[F_MAX_FIELDS];
+
+ int chip_id;
+ struct bq25890_init_data init_data;
+ struct bq25890_state state;
+
+ struct mutex lock; /* protect state data */
+};
+
+static const struct regmap_range bq25890_readonly_reg_ranges[] = {
+ regmap_reg_range(0x0b, 0x0c),
+ regmap_reg_range(0x0e, 0x13),
+};
+
+static const struct regmap_access_table bq25890_writeable_regs = {
+ .no_ranges = bq25890_readonly_reg_ranges,
+ .n_no_ranges = ARRAY_SIZE(bq25890_readonly_reg_ranges),
+};
+
+static const struct regmap_range bq25890_volatile_reg_ranges[] = {
+ regmap_reg_range(0x00, 0x00),
+ regmap_reg_range(0x09, 0x09),
+ regmap_reg_range(0x0b, 0x0c),
+ regmap_reg_range(0x0e, 0x14),
+};
+
+static const struct regmap_access_table bq25890_volatile_regs = {
+ .yes_ranges = bq25890_volatile_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(bq25890_volatile_reg_ranges),
+};
+
+static const struct regmap_config bq25890_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0x14,
+ .cache_type = REGCACHE_RBTREE,
+
+ .wr_table = &bq25890_writeable_regs,
+ .volatile_table = &bq25890_volatile_regs,
+};
+
+static const struct reg_field bq25890_reg_fields[] = {
+ /* REG00 */
+ [F_EN_HIZ] = REG_FIELD(0x00, 7, 7),
+ [F_EN_ILIM] = REG_FIELD(0x00, 6, 6),
+ [F_IILIM] = REG_FIELD(0x00, 0, 5),
+ /* REG01 */
+ [F_BHOT] = REG_FIELD(0x01, 6, 7),
+ [F_BCOLD] = REG_FIELD(0x01, 5, 5),
+ [F_VINDPM_OFS] = REG_FIELD(0x01, 0, 4),
+ /* REG02 */
+ [F_CONV_START] = REG_FIELD(0x02, 7, 7),
+ [F_CONV_RATE] = REG_FIELD(0x02, 6, 6),
+ [F_BOOSTF] = REG_FIELD(0x02, 5, 5),
+ [F_ICO_EN] = REG_FIELD(0x02, 4, 4),
+ [F_HVDCP_EN] = REG_FIELD(0x02, 3, 3),
+ [F_MAXC_EN] = REG_FIELD(0x02, 2, 2),
+ [F_FORCE_DPM] = REG_FIELD(0x02, 1, 1),
+ [F_AUTO_DPDM_EN] = REG_FIELD(0x02, 0, 0),
+ /* REG03 */
+ [F_BAT_LOAD_EN] = REG_FIELD(0x03, 7, 7),
+ [F_WD_RST] = REG_FIELD(0x03, 6, 6),
+ [F_OTG_CFG] = REG_FIELD(0x03, 5, 5),
+ [F_CHG_CFG] = REG_FIELD(0x03, 4, 4),
+ [F_SYSVMIN] = REG_FIELD(0x03, 1, 3),
+ /* REG04 */
+ [F_PUMPX_EN] = REG_FIELD(0x04, 7, 7),
+ [F_ICHG] = REG_FIELD(0x04, 0, 6),
+ /* REG05 */
+ [F_IPRECHG] = REG_FIELD(0x05, 4, 7),
+ [F_ITERM] = REG_FIELD(0x05, 0, 3),
+ /* REG06 */
+ [F_VREG] = REG_FIELD(0x06, 2, 7),
+ [F_BATLOWV] = REG_FIELD(0x06, 1, 1),
+ [F_VRECHG] = REG_FIELD(0x06, 0, 0),
+ /* REG07 */
+ [F_TERM_EN] = REG_FIELD(0x07, 7, 7),
+ [F_STAT_DIS] = REG_FIELD(0x07, 6, 6),
+ [F_WD] = REG_FIELD(0x07, 4, 5),
+ [F_TMR_EN] = REG_FIELD(0x07, 3, 3),
+ [F_CHG_TMR] = REG_FIELD(0x07, 1, 2),
+ [F_JEITA_ISET] = REG_FIELD(0x07, 0, 0),
+ /* REG08 */
+ [F_BATCMP] = REG_FIELD(0x08, 6, 7),
+ [F_VCLAMP] = REG_FIELD(0x08, 2, 4),
+ [F_TREG] = REG_FIELD(0x08, 0, 1),
+ /* REG09 */
+ [F_FORCE_ICO] = REG_FIELD(0x09, 7, 7),
+ [F_TMR2X_EN] = REG_FIELD(0x09, 6, 6),
+ [F_BATFET_DIS] = REG_FIELD(0x09, 5, 5),
+ [F_JEITA_VSET] = REG_FIELD(0x09, 4, 4),
+ [F_BATFET_DLY] = REG_FIELD(0x09, 3, 3),
+ [F_BATFET_RST_EN] = REG_FIELD(0x09, 2, 2),
+ [F_PUMPX_UP] = REG_FIELD(0x09, 1, 1),
+ [F_PUMPX_DN] = REG_FIELD(0x09, 0, 0),
+ /* REG0A */
+ [F_BOOSTV] = REG_FIELD(0x0A, 4, 7),
+ [F_BOOSTI] = REG_FIELD(0x0A, 0, 2),
+ /* REG0B */
+ [F_VBUS_STAT] = REG_FIELD(0x0B, 5, 7),
+ [F_CHG_STAT] = REG_FIELD(0x0B, 3, 4),
+ [F_PG_STAT] = REG_FIELD(0x0B, 2, 2),
+ [F_SDP_STAT] = REG_FIELD(0x0B, 1, 1),
+ [F_VSYS_STAT] = REG_FIELD(0x0B, 0, 0),
+ /* REG0C */
+ [F_WD_FAULT] = REG_FIELD(0x0C, 7, 7),
+ [F_BOOST_FAULT] = REG_FIELD(0x0C, 6, 6),
+ [F_CHG_FAULT] = REG_FIELD(0x0C, 4, 5),
+ [F_BAT_FAULT] = REG_FIELD(0x0C, 3, 3),
+ [F_NTC_FAULT] = REG_FIELD(0x0C, 0, 2),
+ /* REG0D */
+ [F_FORCE_VINDPM] = REG_FIELD(0x0D, 7, 7),
+ [F_VINDPM] = REG_FIELD(0x0D, 0, 6),
+ /* REG0E */
+ [F_THERM_STAT] = REG_FIELD(0x0E, 7, 7),
+ [F_BATV] = REG_FIELD(0x0E, 0, 6),
+ /* REG0F */
+ [F_SYSV] = REG_FIELD(0x0F, 0, 6),
+ /* REG10 */
+ [F_TSPCT] = REG_FIELD(0x10, 0, 6),
+ /* REG11 */
+ [F_VBUS_GD] = REG_FIELD(0x11, 7, 7),
+ [F_VBUSV] = REG_FIELD(0x11, 0, 6),
+ /* REG12 */
+ [F_ICHGR] = REG_FIELD(0x12, 0, 6),
+ /* REG13 */
+ [F_VDPM_STAT] = REG_FIELD(0x13, 7, 7),
+ [F_IDPM_STAT] = REG_FIELD(0x13, 6, 6),
+ [F_IDPM_LIM] = REG_FIELD(0x13, 0, 5),
+ /* REG14 */
+ [F_REG_RST] = REG_FIELD(0x14, 7, 7),
+ [F_ICO_OPTIMIZED] = REG_FIELD(0x14, 6, 6),
+ [F_PN] = REG_FIELD(0x14, 3, 5),
+ [F_TS_PROFILE] = REG_FIELD(0x14, 2, 2),
+ [F_DEV_REV] = REG_FIELD(0x14, 0, 1)
+};
+
+/*
+ * Most of the val -> idx conversions can be computed, given the minimum,
+ * maximum and the step between values. For the rest of conversions, we use
+ * lookup tables.
+ */
+enum bq25890_table_ids {
+ /* range tables */
+ TBL_ICHG,
+ TBL_ITERM,
+ TBL_IPRECHG,
+ TBL_VREG,
+ TBL_BATCMP,
+ TBL_VCLAMP,
+ TBL_BOOSTV,
+ TBL_SYSVMIN,
+
+ /* lookup tables */
+ TBL_TREG,
+ TBL_BOOSTI,
+};
+
+/* Thermal Regulation Threshold lookup table, in degrees Celsius */
+static const u32 bq25890_treg_tbl[] = { 60, 80, 100, 120 };
+
+#define BQ25890_TREG_TBL_SIZE ARRAY_SIZE(bq25890_treg_tbl)
+
+/* Boost mode current limit lookup table, in uA */
+static const u32 bq25890_boosti_tbl[] = {
+ 500000, 700000, 1100000, 1300000, 1600000, 1800000, 2100000, 2400000
+};
+
+#define BQ25890_BOOSTI_TBL_SIZE ARRAY_SIZE(bq25890_boosti_tbl)
+
+struct bq25890_range {
+ u32 min;
+ u32 max;
+ u32 step;
+};
+
+struct bq25890_lookup {
+ const u32 *tbl;
+ u32 size;
+};
+
+static const union {
+ struct bq25890_range rt;
+ struct bq25890_lookup lt;
+} bq25890_tables[] = {
+ /* range tables */
+ [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */
+ [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */
+ [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
+ [TBL_BATCMP] = { .rt = {0, 140, 20} }, /* mOhm */
+ [TBL_VCLAMP] = { .rt = {0, 224000, 32000} }, /* uV */
+ [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
+ [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
+
+ /* lookup tables */
+ [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
+ [TBL_BOOSTI] = { .lt = {bq25890_boosti_tbl, BQ25890_BOOSTI_TBL_SIZE} }
+};
+
+static int bq25890_field_read(struct bq25890_device *bq,
+ enum bq25890_fields field_id)
+{
+ int ret;
+ int val;
+
+ ret = regmap_field_read(bq->rmap_fields[field_id], &val);
+ if (ret < 0)
+ return ret;
+
+ return val;
+}
+
+static int bq25890_field_write(struct bq25890_device *bq,
+ enum bq25890_fields field_id, u8 val)
+{
+ return regmap_field_write(bq->rmap_fields[field_id], val);
+}
+
+static u8 bq25890_find_idx(u32 value, enum bq25890_table_ids id)
+{
+ u8 idx;
+
+ if (id >= TBL_TREG) {
+ const u32 *tbl = bq25890_tables[id].lt.tbl;
+ u32 tbl_size = bq25890_tables[id].lt.size;
+
+ for (idx = 1; idx < tbl_size && tbl[idx] <= value; idx++)
+ ;
+ } else {
+ const struct bq25890_range *rtbl = &bq25890_tables[id].rt;
+ u8 rtbl_size;
+
+ rtbl_size = (rtbl->max - rtbl->min) / rtbl->step + 1;
+
+ for (idx = 1;
+ idx < rtbl_size && (idx * rtbl->step + rtbl->min <= value);
+ idx++)
+ ;
+ }
+
+ return idx - 1;
+}
+
+static u32 bq25890_find_val(u8 idx, enum bq25890_table_ids id)
+{
+ const struct bq25890_range *rtbl;
+
+ /* lookup table? */
+ if (id >= TBL_TREG)
+ return bq25890_tables[id].lt.tbl[idx];
+
+ /* range table */
+ rtbl = &bq25890_tables[id].rt;
+
+ return (rtbl->min + idx * rtbl->step);
+}
+
+enum bq25890_status {
+ STATUS_NOT_CHARGING,
+ STATUS_PRE_CHARGING,
+ STATUS_FAST_CHARGING,
+ STATUS_TERMINATION_DONE,
+};
+
+enum bq25890_chrg_fault {
+ CHRG_FAULT_NORMAL,
+ CHRG_FAULT_INPUT,
+ CHRG_FAULT_THERMAL_SHUTDOWN,
+ CHRG_FAULT_TIMER_EXPIRED,
+};
+
+static int bq25890_power_supply_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret;
+ struct bq25890_device *bq = power_supply_get_drvdata(psy);
+ struct bq25890_state state;
+
+ mutex_lock(&bq->lock);
+ state = bq->state;
+ mutex_unlock(&bq->lock);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!state.online)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (state.chrg_status == STATUS_NOT_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ else if (state.chrg_status == STATUS_PRE_CHARGING ||
+ state.chrg_status == STATUS_FAST_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (state.chrg_status == STATUS_TERMINATION_DONE)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = BQ25890_MANUFACTURER;
+ break;
+
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = state.online;
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (!state.chrg_fault && !state.bat_fault && !state.boost_fault)
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ else if (state.bat_fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ else if (state.chrg_fault == CHRG_FAULT_TIMER_EXPIRED)
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ else if (state.chrg_fault == CHRG_FAULT_THERMAL_SHUTDOWN)
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ else
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ ret = bq25890_field_read(bq, F_ICHGR); /* read measured value */
+ if (ret < 0)
+ return ret;
+
+ /* converted_val = ADC_val * 50mA (table 10.3.19) */
+ val->intval = ret * 50000;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = bq25890_tables[TBL_ICHG].rt.max;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ if (!state.online) {
+ val->intval = 0;
+ break;
+ }
+
+ ret = bq25890_field_read(bq, F_BATV); /* read measured value */
+ if (ret < 0)
+ return ret;
+
+ /* converted_val = 2.304V + ADC_val * 20mV (table 10.3.15) */
+ val->intval = 2304000 + ret * 20000;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = bq25890_tables[TBL_VREG].rt.max;
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ val->intval = bq25890_find_val(bq->init_data.iterm, TBL_ITERM);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int bq25890_get_chip_state(struct bq25890_device *bq,
+ struct bq25890_state *state)
+{
+ int i, ret;
+
+ struct {
+ enum bq25890_fields id;
+ u8 *data;
+ } state_fields[] = {
+ {F_CHG_STAT, &state->chrg_status},
+ {F_PG_STAT, &state->online},
+ {F_VSYS_STAT, &state->vsys_status},
+ {F_BOOST_FAULT, &state->boost_fault},
+ {F_BAT_FAULT, &state->bat_fault},
+ {F_CHG_FAULT, &state->chrg_fault}
+ };
+
+ for (i = 0; i < ARRAY_SIZE(state_fields); i++) {
+ ret = bq25890_field_read(bq, state_fields[i].id);
+ if (ret < 0)
+ return ret;
+
+ *state_fields[i].data = ret;
+ }
+
+ dev_dbg(bq->dev, "S:CHG/PG/VSYS=%d/%d/%d, F:CHG/BOOST/BAT=%d/%d/%d\n",
+ state->chrg_status, state->online, state->vsys_status,
+ state->chrg_fault, state->boost_fault, state->bat_fault);
+
+ return 0;
+}
+
+static bool bq25890_state_changed(struct bq25890_device *bq,
+ struct bq25890_state *new_state)
+{
+ struct bq25890_state old_state;
+
+ mutex_lock(&bq->lock);
+ old_state = bq->state;
+ mutex_unlock(&bq->lock);
+
+ return (old_state.chrg_status != new_state->chrg_status ||
+ old_state.chrg_fault != new_state->chrg_fault ||
+ old_state.online != new_state->online ||
+ old_state.bat_fault != new_state->bat_fault ||
+ old_state.boost_fault != new_state->boost_fault ||
+ old_state.vsys_status != new_state->vsys_status);
+}
+
+static void bq25890_handle_state_change(struct bq25890_device *bq,
+ struct bq25890_state *new_state)
+{
+ int ret;
+ struct bq25890_state old_state;
+
+ mutex_lock(&bq->lock);
+ old_state = bq->state;
+ mutex_unlock(&bq->lock);
+
+ if (!new_state->online) { /* power removed */
+ /* disable ADC */
+ ret = bq25890_field_write(bq, F_CONV_START, 0);
+ if (ret < 0)
+ goto error;
+ } else if (!old_state.online) { /* power inserted */
+ /* enable ADC, to have control of charge current/voltage */
+ ret = bq25890_field_write(bq, F_CONV_START, 1);
+ if (ret < 0)
+ goto error;
+ }
+
+ return;
+
+error:
+ dev_err(bq->dev, "Error communicating with the chip.\n");
+}
+
+static irqreturn_t bq25890_irq_handler_thread(int irq, void *private)
+{
+ struct bq25890_device *bq = private;
+ int ret;
+ struct bq25890_state state;
+
+ ret = bq25890_get_chip_state(bq, &state);
+ if (ret < 0)
+ goto handled;
+
+ if (!bq25890_state_changed(bq, &state))
+ goto handled;
+
+ bq25890_handle_state_change(bq, &state);
+
+ mutex_lock(&bq->lock);
+ bq->state = state;
+ mutex_unlock(&bq->lock);
+
+ power_supply_changed(bq->charger);
+
+handled:
+ return IRQ_HANDLED;
+}
+
+static int bq25890_chip_reset(struct bq25890_device *bq)
+{
+ int ret;
+ int rst_check_counter = 10;
+
+ ret = bq25890_field_write(bq, F_REG_RST, 1);
+ if (ret < 0)
+ return ret;
+
+ do {
+ ret = bq25890_field_read(bq, F_REG_RST);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(5, 10);
+ } while (ret == 1 && --rst_check_counter);
+
+ if (!rst_check_counter)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static int bq25890_hw_init(struct bq25890_device *bq)
+{
+ int ret;
+ int i;
+ struct bq25890_state state;
+
+ const struct {
+ enum bq25890_fields id;
+ u32 value;
+ } init_data[] = {
+ {F_ICHG, bq->init_data.ichg},
+ {F_VREG, bq->init_data.vreg},
+ {F_ITERM, bq->init_data.iterm},
+ {F_IPRECHG, bq->init_data.iprechg},
+ {F_SYSVMIN, bq->init_data.sysvmin},
+ {F_BOOSTV, bq->init_data.boostv},
+ {F_BOOSTI, bq->init_data.boosti},
+ {F_BOOSTF, bq->init_data.boostf},
+ {F_EN_ILIM, bq->init_data.ilim_en},
+ {F_TREG, bq->init_data.treg}
+ };
+
+ ret = bq25890_chip_reset(bq);
+ if (ret < 0)
+ return ret;
+
+ /* disable watchdog */
+ ret = bq25890_field_write(bq, F_WD, 0);
+ if (ret < 0)
+ return ret;
+
+ /* initialize currents/voltages and other parameters */
+ for (i = 0; i < ARRAY_SIZE(init_data); i++) {
+ ret = bq25890_field_write(bq, init_data[i].id,
+ init_data[i].value);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Configure ADC for continuous conversions. This does not enable it. */
+ ret = bq25890_field_write(bq, F_CONV_RATE, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = bq25890_get_chip_state(bq, &state);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&bq->lock);
+ bq->state = state;
+ mutex_unlock(&bq->lock);
+
+ return 0;
+}
+
+static enum power_supply_property bq25890_power_supply_props[] = {
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+};
+
+static char *bq25890_charger_supplied_to[] = {
+ "main-battery",
+};
+
+static const struct power_supply_desc bq25890_power_supply_desc = {
+ .name = "bq25890-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = bq25890_power_supply_props,
+ .num_properties = ARRAY_SIZE(bq25890_power_supply_props),
+ .get_property = bq25890_power_supply_get_property,
+};
+
+static int bq25890_power_supply_init(struct bq25890_device *bq)
+{
+ struct power_supply_config psy_cfg = { .drv_data = bq, };
+
+ psy_cfg.supplied_to = bq25890_charger_supplied_to;
+ psy_cfg.num_supplicants = ARRAY_SIZE(bq25890_charger_supplied_to);
+
+ bq->charger = power_supply_register(bq->dev, &bq25890_power_supply_desc,
+ &psy_cfg);
+
+ return PTR_ERR_OR_ZERO(bq->charger);
+}
+
+static void bq25890_usb_work(struct work_struct *data)
+{
+ int ret;
+ struct bq25890_device *bq =
+ container_of(data, struct bq25890_device, usb_work);
+
+ switch (bq->usb_event) {
+ case USB_EVENT_ID:
+ /* Enable boost mode */
+ ret = bq25890_field_write(bq, F_OTG_CFG, 1);
+ if (ret < 0)
+ goto error;
+ break;
+
+ case USB_EVENT_NONE:
+ /* Disable boost mode */
+ ret = bq25890_field_write(bq, F_OTG_CFG, 0);
+ if (ret < 0)
+ goto error;
+
+ power_supply_changed(bq->charger);
+ break;
+ }
+
+ return;
+
+error:
+ dev_err(bq->dev, "Error switching to boost/charger mode.\n");
+}
+
+static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
+ void *priv)
+{
+ struct bq25890_device *bq =
+ container_of(nb, struct bq25890_device, usb_nb);
+
+ bq->usb_event = val;
+ queue_work(system_power_efficient_wq, &bq->usb_work);
+
+ return NOTIFY_OK;
+}
+
+static int bq25890_irq_probe(struct bq25890_device *bq)
+{
+ struct gpio_desc *irq;
+
+ irq = devm_gpiod_get_index(bq->dev, BQ25890_IRQ_PIN, 0, GPIOD_IN);
+ if (IS_ERR(irq)) {
+ dev_err(bq->dev, "Could not probe irq pin.\n");
+ return PTR_ERR(irq);
+ }
+
+ return gpiod_to_irq(irq);
+}
+
+static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
+{
+ int ret;
+ u32 property;
+ int i;
+ struct bq25890_init_data *init = &bq->init_data;
+ struct {
+ char *name;
+ bool optional;
+ enum bq25890_table_ids tbl_id;
+ u8 *conv_data; /* holds converted value from given property */
+ } props[] = {
+ /* required properties */
+ {"ti,charge-current", false, TBL_ICHG, &init->ichg},
+ {"ti,battery-regulation-voltage", false, TBL_VREG, &init->vreg},
+ {"ti,termination-current", false, TBL_ITERM, &init->iterm},
+ {"ti,precharge-current", false, TBL_ITERM, &init->iprechg},
+ {"ti,minimum-sys-voltage", false, TBL_SYSVMIN, &init->sysvmin},
+ {"ti,boost-voltage", false, TBL_BOOSTV, &init->boostv},
+ {"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
+
+ /* optional properties */
+ {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
+ };
+
+ /* initialize data for optional properties */
+ init->treg = 3; /* 120 degrees Celsius */
+
+ for (i = 0; i < ARRAY_SIZE(props); i++) {
+ ret = device_property_read_u32(bq->dev, props[i].name,
+ &property);
+ if (ret < 0) {
+ if (props[i].optional)
+ continue;
+
+ return ret;
+ }
+
+ *props[i].conv_data = bq25890_find_idx(property,
+ props[i].tbl_id);
+ }
+
+ return 0;
+}
+
+static int bq25890_fw_probe(struct bq25890_device *bq)
+{
+ int ret;
+ struct bq25890_init_data *init = &bq->init_data;
+
+ ret = bq25890_fw_read_u32_props(bq);
+ if (ret < 0)
+ return ret;
+
+ init->ilim_en = device_property_read_bool(bq->dev, "ti,use-ilim-pin");
+ init->boostf = device_property_read_bool(bq->dev, "ti,boost-low-freq");
+
+ return 0;
+}
+
+static int bq25890_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct device *dev = &client->dev;
+ struct bq25890_device *bq;
+ int ret;
+ int i;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
+ return -ENODEV;
+ }
+
+ bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
+ if (!bq)
+ return -ENOMEM;
+
+ bq->client = client;
+ bq->dev = dev;
+
+ mutex_init(&bq->lock);
+
+ bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config);
+ if (IS_ERR(bq->rmap)) {
+ dev_err(dev, "failed to allocate register map\n");
+ return PTR_ERR(bq->rmap);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bq25890_reg_fields); i++) {
+ const struct reg_field *reg_fields = bq25890_reg_fields;
+
+ bq->rmap_fields[i] = devm_regmap_field_alloc(dev, bq->rmap,
+ reg_fields[i]);
+ if (IS_ERR(bq->rmap_fields[i])) {
+ dev_err(dev, "cannot allocate regmap field\n");
+ return PTR_ERR(bq->rmap_fields[i]);
+ }
+ }
+
+ i2c_set_clientdata(client, bq);
+
+ bq->chip_id = bq25890_field_read(bq, F_PN);
+ if (bq->chip_id < 0) {
+ dev_err(dev, "Cannot read chip ID.\n");
+ return bq->chip_id;
+ }
+
+ if (bq->chip_id != BQ25890_ID) {
+ dev_err(dev, "Chip with ID=%d, not supported!\n", bq->chip_id);
+ return -ENODEV;
+ }
+
+ if (!dev->platform_data) {
+ ret = bq25890_fw_probe(bq);
+ if (ret < 0) {
+ dev_err(dev, "Cannot read device properties.\n");
+ return ret;
+ }
+ } else {
+ return -ENODEV;
+ }
+
+ ret = bq25890_hw_init(bq);
+ if (ret < 0) {
+ dev_err(dev, "Cannot initialize the chip.\n");
+ return ret;
+ }
+
+ if (client->irq <= 0)
+ client->irq = bq25890_irq_probe(bq);
+
+ if (client->irq < 0) {
+ dev_err(dev, "No irq resource found.\n");
+ return client->irq;
+ }
+
+ /* OTG reporting */
+ bq->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+ if (!IS_ERR_OR_NULL(bq->usb_phy)) {
+ INIT_WORK(&bq->usb_work, bq25890_usb_work);
+ bq->usb_nb.notifier_call = bq25890_usb_notifier;
+ usb_register_notifier(bq->usb_phy, &bq->usb_nb);
+ }
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ bq25890_irq_handler_thread,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ BQ25890_IRQ_PIN, bq);
+ if (ret)
+ goto irq_fail;
+
+ ret = bq25890_power_supply_init(bq);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register power supply\n");
+ goto irq_fail;
+ }
+
+ return 0;
+
+irq_fail:
+ if (!IS_ERR_OR_NULL(bq->usb_phy))
+ usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
+
+ return ret;
+}
+
+static int bq25890_remove(struct i2c_client *client)
+{
+ struct bq25890_device *bq = i2c_get_clientdata(client);
+
+ power_supply_unregister(bq->charger);
+
+ if (!IS_ERR_OR_NULL(bq->usb_phy))
+ usb_unregister_notifier(bq->usb_phy, &bq->usb_nb);
+
+ /* reset all registers to default values */
+ bq25890_chip_reset(bq);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bq25890_suspend(struct device *dev)
+{
+ struct bq25890_device *bq = dev_get_drvdata(dev);
+
+ /*
+ * If charger is removed, while in suspend, make sure ADC is diabled
+ * since it consumes slightly more power.
+ */
+ return bq25890_field_write(bq, F_CONV_START, 0);
+}
+
+static int bq25890_resume(struct device *dev)
+{
+ int ret;
+ struct bq25890_state state;
+ struct bq25890_device *bq = dev_get_drvdata(dev);
+
+ ret = bq25890_get_chip_state(bq, &state);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&bq->lock);
+ bq->state = state;
+ mutex_unlock(&bq->lock);
+
+ /* Re-enable ADC only if charger is plugged in. */
+ if (state.online) {
+ ret = bq25890_field_write(bq, F_CONV_START, 1);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* signal userspace, maybe state changed while suspended */
+ power_supply_changed(bq->charger);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops bq25890_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(bq25890_suspend, bq25890_resume)
+};
+
+static const struct i2c_device_id bq25890_i2c_ids[] = {
+ { "bq25890", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, bq25890_i2c_ids);
+
+static const struct of_device_id bq25890_of_match[] = {
+ { .compatible = "ti,bq25890", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bq25890_of_match);
+
+static const struct acpi_device_id bq25890_acpi_match[] = {
+ {"BQ258900", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, bq25890_acpi_match);
+
+static struct i2c_driver bq25890_driver = {
+ .driver = {
+ .name = "bq25890-charger",
+ .of_match_table = of_match_ptr(bq25890_of_match),
+ .acpi_match_table = ACPI_PTR(bq25890_acpi_match),
+ .pm = &bq25890_pm,
+ },
+ .probe = bq25890_probe,
+ .remove = bq25890_remove,
+ .id_table = bq25890_i2c_ids,
+};
+module_i2c_driver(bq25890_driver);
+
+MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@intel.com>");
+MODULE_DESCRIPTION("bq25890 charger driver");
+MODULE_LICENSE("GPL");
INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
- cm->charger_psy = power_supply_register(NULL, &cm->charger_psy_desc,
+ cm->charger_psy = power_supply_register(&pdev->dev,
+ &cm->charger_psy_desc,
&psy_cfg);
if (IS_ERR(cm->charger_psy)) {
dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n",
#define dP_ACC_100 0x1900
#define dP_ACC_200 0x3200
+#define MAX17042_VMAX_TOLERANCE 50 /* 50 mV */
+
struct max17042_chip {
struct i2c_client *client;
struct regmap *regmap;
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
+ POWER_SUPPLY_PROP_TEMP_MIN,
+ POWER_SUPPLY_PROP_TEMP_MAX,
+ POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
};
+static int max17042_get_temperature(struct max17042_chip *chip, int *temp)
+{
+ int ret;
+ u32 data;
+ struct regmap *map = chip->regmap;
+
+ ret = regmap_read(map, MAX17042_TEMP, &data);
+ if (ret < 0)
+ return ret;
+
+ *temp = data;
+ /* The value is signed. */
+ if (*temp & 0x8000) {
+ *temp = (0x7fff & ~*temp) + 1;
+ *temp *= -1;
+ }
+
+ /* The value is converted into deci-centigrade scale */
+ /* Units of LSB = 1 / 256 degree Celsius */
+ *temp = *temp * 10 / 256;
+ return 0;
+}
+
+static int max17042_get_battery_health(struct max17042_chip *chip, int *health)
+{
+ int temp, vavg, vbatt, ret;
+ u32 val;
+
+ ret = regmap_read(chip->regmap, MAX17042_AvgVCELL, &val);
+ if (ret < 0)
+ goto health_error;
+
+ /* bits [0-3] unused */
+ vavg = val * 625 / 8;
+ /* Convert to millivolts */
+ vavg /= 1000;
+
+ ret = regmap_read(chip->regmap, MAX17042_VCELL, &val);
+ if (ret < 0)
+ goto health_error;
+
+ /* bits [0-3] unused */
+ vbatt = val * 625 / 8;
+ /* Convert to millivolts */
+ vbatt /= 1000;
+
+ if (vavg < chip->pdata->vmin) {
+ *health = POWER_SUPPLY_HEALTH_DEAD;
+ goto out;
+ }
+
+ if (vbatt > chip->pdata->vmax + MAX17042_VMAX_TOLERANCE) {
+ *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ goto out;
+ }
+
+ ret = max17042_get_temperature(chip, &temp);
+ if (ret < 0)
+ goto health_error;
+
+ if (temp <= chip->pdata->temp_min) {
+ *health = POWER_SUPPLY_HEALTH_COLD;
+ goto out;
+ }
+
+ if (temp >= chip->pdata->temp_max) {
+ *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ goto out;
+ }
+
+ *health = POWER_SUPPLY_HEALTH_GOOD;
+
+out:
+ return 0;
+
+health_error:
+ return ret;
+}
+
static int max17042_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
val->intval = data * 1000 / 2;
break;
case POWER_SUPPLY_PROP_TEMP:
- ret = regmap_read(map, MAX17042_TEMP, &data);
+ ret = max17042_get_temperature(chip, &val->intval);
+ if (ret < 0)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+ /* LSB is Alert Minimum. In deci-centigrade */
+ val->intval = (data & 0xff) * 10;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+ /* MSB is Alert Maximum. In deci-centigrade */
+ val->intval = (data >> 8) * 10;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MIN:
+ val->intval = chip->pdata->temp_min;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MAX:
+ val->intval = chip->pdata->temp_max;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = max17042_get_battery_health(chip, &val->intval);
if (ret < 0)
return ret;
-
- val->intval = data;
- /* The value is signed. */
- if (val->intval & 0x8000) {
- val->intval = (0x7fff & ~val->intval) + 1;
- val->intval *= -1;
- }
- /* The value is converted into deci-centigrade scale */
- /* Units of LSB = 1 / 256 degree Celsius */
- val->intval = val->intval * 10 / 256;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (chip->pdata->enable_current_sense) {
return 0;
}
+static int max17042_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct max17042_chip *chip = power_supply_get_drvdata(psy);
+ struct regmap *map = chip->regmap;
+ int ret = 0;
+ u32 data;
+ int8_t temp;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+
+ /* Input in deci-centigrade, convert to centigrade */
+ temp = val->intval / 10;
+ /* force min < max */
+ if (temp >= (int8_t)(data >> 8))
+ temp = (int8_t)(data >> 8) - 1;
+ /* Write both MAX and MIN ALERT */
+ data = (data & 0xff00) + temp;
+ ret = regmap_write(map, MAX17042_TALRT_Th, data);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+
+ /* Input in Deci-Centigrade, convert to centigrade */
+ temp = val->intval / 10;
+ /* force max > min */
+ if (temp <= (int8_t)(data & 0xff))
+ temp = (int8_t)(data & 0xff) + 1;
+ /* Write both MAX and MIN ALERT */
+ data = (data & 0xff) + (temp << 8);
+ ret = regmap_write(map, MAX17042_TALRT_Th, data);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int max17042_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = 1;
+ break;
+ default:
+ ret = 0;
+ }
+
+ return ret;
+}
+
static int max17042_write_verify_reg(struct regmap *map, u8 reg, u32 value)
{
int retries = 8;
pdata->enable_current_sense = true;
}
+ if (of_property_read_s32(np, "maxim,cold-temp", &pdata->temp_min))
+ pdata->temp_min = INT_MIN;
+ if (of_property_read_s32(np, "maxim,over-heat-temp", &pdata->temp_max))
+ pdata->temp_max = INT_MAX;
+ if (of_property_read_s32(np, "maxim,dead-volt", &pdata->vmin))
+ pdata->vmin = INT_MIN;
+ if (of_property_read_s32(np, "maxim,over-volt", &pdata->vmax))
+ pdata->vmax = INT_MAX;
+
return pdata;
}
#else
.name = "max170xx_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max17042_get_property,
+ .set_property = max17042_set_property,
+ .property_is_writeable = max17042_property_is_writeable,
.properties = max17042_battery_props,
.num_properties = ARRAY_SIZE(max17042_battery_props),
};
.name = "max170xx_battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = max17042_get_property,
+ .set_property = max17042_set_property,
+ .property_is_writeable = max17042_property_is_writeable,
.properties = max17042_battery_props,
.num_properties = ARRAY_SIZE(max17042_battery_props) - 2,
};
static struct device_type power_supply_dev_type;
+#define POWER_SUPPLY_DEFERRED_REGISTER_TIME msecs_to_jiffies(10)
+
static bool __power_supply_is_supplied_by(struct power_supply *supplier,
struct power_supply *supply)
{
}
EXPORT_SYMBOL_GPL(power_supply_changed);
+/*
+ * Notify that power supply was registered after parent finished the probing.
+ *
+ * Often power supply is registered from driver's probe function. However
+ * calling power_supply_changed() directly from power_supply_register()
+ * would lead to execution of get_property() function provided by the driver
+ * too early - before the probe ends.
+ *
+ * Avoid that by waiting on parent's mutex.
+ */
+static void power_supply_deferred_register_work(struct work_struct *work)
+{
+ struct power_supply *psy = container_of(work, struct power_supply,
+ deferred_register_work.work);
+
+ if (psy->dev.parent)
+ mutex_lock(&psy->dev.parent->mutex);
+
+ power_supply_changed(psy);
+
+ if (psy->dev.parent)
+ mutex_unlock(&psy->dev.parent->mutex);
+}
+
#ifdef CONFIG_OF
#include <linux/of.h>
return psy;
}
EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
+
+static void devm_power_supply_put(struct device *dev, void *res)
+{
+ struct power_supply **psy = res;
+
+ power_supply_put(*psy);
+}
+
+/**
+ * devm_power_supply_get_by_phandle() - Resource managed version of
+ * power_supply_get_by_phandle()
+ * @dev: Pointer to device holding phandle property
+ * @phandle_name: Name of property holding a power supply phandle
+ *
+ * Return: On success returns a reference to a power supply with
+ * matching name equals to value under @property, NULL or ERR_PTR otherwise.
+ */
+struct power_supply *devm_power_supply_get_by_phandle(struct device *dev,
+ const char *property)
+{
+ struct power_supply **ptr, *psy;
+
+ if (!dev->of_node)
+ return ERR_PTR(-ENODEV);
+
+ ptr = devres_alloc(devm_power_supply_put, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ psy = power_supply_get_by_phandle(dev->of_node, property);
+ if (IS_ERR_OR_NULL(psy)) {
+ devres_free(ptr);
+ } else {
+ *ptr = psy;
+ devres_add(dev, ptr);
+ }
+ return psy;
+}
+EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle);
#endif /* CONFIG_OF */
int power_supply_get_property(struct power_supply *psy,
struct power_supply *psy;
int rc;
+ if (!parent)
+ pr_warn("%s: Expected proper parent device for '%s'\n",
+ __func__, desc->name);
+
psy = kzalloc(sizeof(*psy), GFP_KERNEL);
if (!psy)
return ERR_PTR(-ENOMEM);
dev->release = power_supply_dev_release;
dev_set_drvdata(dev, psy);
psy->desc = desc;
- atomic_inc(&psy->use_cnt);
if (cfg) {
psy->drv_data = cfg->drv_data;
psy->of_node = cfg->of_node;
goto dev_set_name_failed;
INIT_WORK(&psy->changed_work, power_supply_changed_work);
+ INIT_DELAYED_WORK(&psy->deferred_register_work,
+ power_supply_deferred_register_work);
rc = power_supply_check_supplies(psy);
if (rc) {
if (rc)
goto create_triggers_failed;
- power_supply_changed(psy);
+ /*
+ * Update use_cnt after any uevents (most notably from device_add()).
+ * We are here still during driver's probe but
+ * the power_supply_uevent() calls back driver's get_property
+ * method so:
+ * 1. Driver did not assigned the returned struct power_supply,
+ * 2. Driver could not finish initialization (anything in its probe
+ * after calling power_supply_register()).
+ */
+ atomic_inc(&psy->use_cnt);
+
+ queue_delayed_work(system_power_efficient_wq,
+ &psy->deferred_register_work,
+ POWER_SUPPLY_DEFERRED_REGISTER_TIME);
return psy;
/**
* power_supply_register() - Register new power supply
- * @parent: Device to be a parent of power supply's device
+ * @parent: Device to be a parent of power supply's device, usually
+ * the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
EXPORT_SYMBOL_GPL(power_supply_register);
/**
- * power_supply_register() - Register new non-waking-source power supply
- * @parent: Device to be a parent of power supply's device
+ * power_supply_register_no_ws() - Register new non-waking-source power supply
+ * @parent: Device to be a parent of power supply's device, usually
+ * the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
}
/**
- * power_supply_register() - Register managed power supply
- * @parent: Device to be a parent of power supply's device
+ * devm_power_supply_register() - Register managed power supply
+ * @parent: Device to be a parent of power supply's device, usually
+ * the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
EXPORT_SYMBOL_GPL(devm_power_supply_register);
/**
- * power_supply_register() - Register managed non-waking-source power supply
- * @parent: Device to be a parent of power supply's device
+ * devm_power_supply_register_no_ws() - Register managed non-waking-source power supply
+ * @parent: Device to be a parent of power supply's device, usually
+ * the device which probe function calls this
* @desc: Description of power supply, must be valid through whole
* lifetime of this power supply
* @cfg: Run-time specific configuration accessed during registering,
{
WARN_ON(atomic_dec_return(&psy->use_cnt));
cancel_work_sync(&psy->changed_work);
+ cancel_delayed_work_sync(&psy->deferred_register_work);
sysfs_remove_link(&psy->dev.kobj, "powers");
power_supply_remove_triggers(psy);
psy_unregister_cooler(psy);
unsigned long delay_on = 0;
unsigned long delay_off = 0;
- if (psy->desc->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
+ if (power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
return;
dev_dbg(&psy->dev, "%s %d\n", __func__, status.intval);
{
union power_supply_propval online;
- if (psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
+ if (power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
return;
dev_dbg(&psy->dev, "%s %d\n", __func__, online.intval);
value.intval = long_val;
- ret = psy->desc->set_property(psy, off, &value);
+ ret = power_supply_set_property(psy, off, &value);
if (ret < 0)
return ret;
if (property == attrno) {
if (psy->desc->property_is_writeable &&
- power_supply_property_is_writeable(psy, property) > 0)
+ psy->desc->property_is_writeable(psy, property) > 0)
mode |= S_IWUSR;
return mode;
return 0;
}
-static struct platform_device_id at91_reset_plat_match[] = {
+static const struct platform_device_id at91_reset_plat_match[] = {
{ "at91-sam9260-reset", (unsigned long)at91sam9260_restart },
{ "at91-sam9g45-reset", (unsigned long)at91sam9g45_restart },
{ /* sentinel */ }
static int gpio_poweroff_probe(struct platform_device *pdev)
{
bool input = false;
+ enum gpiod_flags flags;
/* If a pm_power_off function has already been added, leave it alone */
if (pm_power_off != NULL) {
return -EBUSY;
}
- reset_gpio = devm_gpiod_get(&pdev->dev, NULL);
- if (IS_ERR(reset_gpio))
- return PTR_ERR(reset_gpio);
-
input = of_property_read_bool(pdev->dev.of_node, "input");
+ if (input)
+ flags = GPIOD_IN;
+ else
+ flags = GPIOD_OUT_LOW;
- if (input) {
- if (gpiod_direction_input(reset_gpio)) {
- dev_err(&pdev->dev,
- "Could not set direction of reset GPIO to input\n");
- return -ENODEV;
- }
- } else {
- if (gpiod_direction_output(reset_gpio, 0)) {
- dev_err(&pdev->dev,
- "Could not set direction of reset GPIO\n");
- return -ENODEV;
- }
- }
+ reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
+ if (IS_ERR(reset_gpio))
+ return PTR_ERR(reset_gpio);
pm_power_off = &gpio_poweroff_do_poweroff;
return 0;
}
gpio_restart->restart_handler.notifier_call = gpio_restart_notify;
- gpio_restart->restart_handler.priority = 128;
+ gpio_restart->restart_handler.priority = 129;
gpio_restart->active_delay_ms = 100;
gpio_restart->inactive_delay_ms = 100;
gpio_restart->wait_delay_ms = 3000;
return ret;
}
- data->gpio_trigger = devm_gpiod_get(&pdev->dev, "trigger", GPIOD_IN);
+ data->gpio_trigger = devm_gpiod_get_optional(&pdev->dev, "trigger",
+ GPIOD_IN);
if (IS_ERR(data->gpio_trigger)) {
/*
* It's not a problem if the trigger gpio isn't available, but
* it is worth a warning if its use was defined in the device
* tree.
*/
- if (PTR_ERR(data->gpio_trigger) != -ENOENT)
- dev_err(&pdev->dev,
- "unable to claim gpio \"trigger\"\n");
+ dev_err(&pdev->dev, "unable to claim gpio \"trigger\"\n");
data->gpio_trigger = NULL;
}
--- /dev/null
+/*
+ * Driver for Richtek RT9455WSC battery charger.
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/of_irq.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/power_supply.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/usb/phy.h>
+#include <linux/regmap.h>
+
+#define RT9455_MANUFACTURER "Richtek"
+#define RT9455_MODEL_NAME "RT9455"
+#define RT9455_DRIVER_NAME "rt9455-charger"
+
+#define RT9455_IRQ_NAME "interrupt"
+
+#define RT9455_PWR_RDY_DELAY 1 /* 1 second */
+#define RT9455_MAX_CHARGING_TIME 21600 /* 6 hrs */
+#define RT9455_BATT_PRESENCE_DELAY 60 /* 60 seconds */
+
+#define RT9455_CHARGE_MODE 0x00
+#define RT9455_BOOST_MODE 0x01
+
+#define RT9455_FAULT 0x03
+
+#define RT9455_IAICR_100MA 0x00
+#define RT9455_IAICR_500MA 0x01
+#define RT9455_IAICR_NO_LIMIT 0x03
+
+#define RT9455_CHARGE_DISABLE 0x00
+#define RT9455_CHARGE_ENABLE 0x01
+
+#define RT9455_PWR_FAULT 0x00
+#define RT9455_PWR_GOOD 0x01
+
+#define RT9455_REG_CTRL1 0x00 /* CTRL1 reg address */
+#define RT9455_REG_CTRL2 0x01 /* CTRL2 reg address */
+#define RT9455_REG_CTRL3 0x02 /* CTRL3 reg address */
+#define RT9455_REG_DEV_ID 0x03 /* DEV_ID reg address */
+#define RT9455_REG_CTRL4 0x04 /* CTRL4 reg address */
+#define RT9455_REG_CTRL5 0x05 /* CTRL5 reg address */
+#define RT9455_REG_CTRL6 0x06 /* CTRL6 reg address */
+#define RT9455_REG_CTRL7 0x07 /* CTRL7 reg address */
+#define RT9455_REG_IRQ1 0x08 /* IRQ1 reg address */
+#define RT9455_REG_IRQ2 0x09 /* IRQ2 reg address */
+#define RT9455_REG_IRQ3 0x0A /* IRQ3 reg address */
+#define RT9455_REG_MASK1 0x0B /* MASK1 reg address */
+#define RT9455_REG_MASK2 0x0C /* MASK2 reg address */
+#define RT9455_REG_MASK3 0x0D /* MASK3 reg address */
+
+enum rt9455_fields {
+ F_STAT, F_BOOST, F_PWR_RDY, F_OTG_PIN_POLARITY, /* CTRL1 reg fields */
+
+ F_IAICR, F_TE_SHDN_EN, F_HIGHER_OCP, F_TE, F_IAICR_INT, F_HIZ,
+ F_OPA_MODE, /* CTRL2 reg fields */
+
+ F_VOREG, F_OTG_PL, F_OTG_EN, /* CTRL3 reg fields */
+
+ F_VENDOR_ID, F_CHIP_REV, /* DEV_ID reg fields */
+
+ F_RST, /* CTRL4 reg fields */
+
+ F_TMR_EN, F_MIVR, F_IPREC, F_IEOC_PERCENTAGE, /* CTRL5 reg fields*/
+
+ F_IAICR_SEL, F_ICHRG, F_VPREC, /* CTRL6 reg fields */
+
+ F_BATD_EN, F_CHG_EN, F_VMREG, /* CTRL7 reg fields */
+
+ F_TSDI, F_VINOVPI, F_BATAB, /* IRQ1 reg fields */
+
+ F_CHRVPI, F_CHBATOVI, F_CHTERMI, F_CHRCHGI, F_CH32MI, F_CHTREGI,
+ F_CHMIVRI, /* IRQ2 reg fields */
+
+ F_BSTBUSOVI, F_BSTOLI, F_BSTLOWVI, F_BST32SI, /* IRQ3 reg fields */
+
+ F_TSDM, F_VINOVPIM, F_BATABM, /* MASK1 reg fields */
+
+ F_CHRVPIM, F_CHBATOVIM, F_CHTERMIM, F_CHRCHGIM, F_CH32MIM, F_CHTREGIM,
+ F_CHMIVRIM, /* MASK2 reg fields */
+
+ F_BSTVINOVIM, F_BSTOLIM, F_BSTLOWVIM, F_BST32SIM, /* MASK3 reg fields */
+
+ F_MAX_FIELDS
+};
+
+static const struct reg_field rt9455_reg_fields[] = {
+ [F_STAT] = REG_FIELD(RT9455_REG_CTRL1, 4, 5),
+ [F_BOOST] = REG_FIELD(RT9455_REG_CTRL1, 3, 3),
+ [F_PWR_RDY] = REG_FIELD(RT9455_REG_CTRL1, 2, 2),
+ [F_OTG_PIN_POLARITY] = REG_FIELD(RT9455_REG_CTRL1, 1, 1),
+
+ [F_IAICR] = REG_FIELD(RT9455_REG_CTRL2, 6, 7),
+ [F_TE_SHDN_EN] = REG_FIELD(RT9455_REG_CTRL2, 5, 5),
+ [F_HIGHER_OCP] = REG_FIELD(RT9455_REG_CTRL2, 4, 4),
+ [F_TE] = REG_FIELD(RT9455_REG_CTRL2, 3, 3),
+ [F_IAICR_INT] = REG_FIELD(RT9455_REG_CTRL2, 2, 2),
+ [F_HIZ] = REG_FIELD(RT9455_REG_CTRL2, 1, 1),
+ [F_OPA_MODE] = REG_FIELD(RT9455_REG_CTRL2, 0, 0),
+
+ [F_VOREG] = REG_FIELD(RT9455_REG_CTRL3, 2, 7),
+ [F_OTG_PL] = REG_FIELD(RT9455_REG_CTRL3, 1, 1),
+ [F_OTG_EN] = REG_FIELD(RT9455_REG_CTRL3, 0, 0),
+
+ [F_VENDOR_ID] = REG_FIELD(RT9455_REG_DEV_ID, 4, 7),
+ [F_CHIP_REV] = REG_FIELD(RT9455_REG_DEV_ID, 0, 3),
+
+ [F_RST] = REG_FIELD(RT9455_REG_CTRL4, 7, 7),
+
+ [F_TMR_EN] = REG_FIELD(RT9455_REG_CTRL5, 7, 7),
+ [F_MIVR] = REG_FIELD(RT9455_REG_CTRL5, 4, 5),
+ [F_IPREC] = REG_FIELD(RT9455_REG_CTRL5, 2, 3),
+ [F_IEOC_PERCENTAGE] = REG_FIELD(RT9455_REG_CTRL5, 0, 1),
+
+ [F_IAICR_SEL] = REG_FIELD(RT9455_REG_CTRL6, 7, 7),
+ [F_ICHRG] = REG_FIELD(RT9455_REG_CTRL6, 4, 6),
+ [F_VPREC] = REG_FIELD(RT9455_REG_CTRL6, 0, 2),
+
+ [F_BATD_EN] = REG_FIELD(RT9455_REG_CTRL7, 6, 6),
+ [F_CHG_EN] = REG_FIELD(RT9455_REG_CTRL7, 4, 4),
+ [F_VMREG] = REG_FIELD(RT9455_REG_CTRL7, 0, 3),
+
+ [F_TSDI] = REG_FIELD(RT9455_REG_IRQ1, 7, 7),
+ [F_VINOVPI] = REG_FIELD(RT9455_REG_IRQ1, 6, 6),
+ [F_BATAB] = REG_FIELD(RT9455_REG_IRQ1, 0, 0),
+
+ [F_CHRVPI] = REG_FIELD(RT9455_REG_IRQ2, 7, 7),
+ [F_CHBATOVI] = REG_FIELD(RT9455_REG_IRQ2, 5, 5),
+ [F_CHTERMI] = REG_FIELD(RT9455_REG_IRQ2, 4, 4),
+ [F_CHRCHGI] = REG_FIELD(RT9455_REG_IRQ2, 3, 3),
+ [F_CH32MI] = REG_FIELD(RT9455_REG_IRQ2, 2, 2),
+ [F_CHTREGI] = REG_FIELD(RT9455_REG_IRQ2, 1, 1),
+ [F_CHMIVRI] = REG_FIELD(RT9455_REG_IRQ2, 0, 0),
+
+ [F_BSTBUSOVI] = REG_FIELD(RT9455_REG_IRQ3, 7, 7),
+ [F_BSTOLI] = REG_FIELD(RT9455_REG_IRQ3, 6, 6),
+ [F_BSTLOWVI] = REG_FIELD(RT9455_REG_IRQ3, 5, 5),
+ [F_BST32SI] = REG_FIELD(RT9455_REG_IRQ3, 3, 3),
+
+ [F_TSDM] = REG_FIELD(RT9455_REG_MASK1, 7, 7),
+ [F_VINOVPIM] = REG_FIELD(RT9455_REG_MASK1, 6, 6),
+ [F_BATABM] = REG_FIELD(RT9455_REG_MASK1, 0, 0),
+
+ [F_CHRVPIM] = REG_FIELD(RT9455_REG_MASK2, 7, 7),
+ [F_CHBATOVIM] = REG_FIELD(RT9455_REG_MASK2, 5, 5),
+ [F_CHTERMIM] = REG_FIELD(RT9455_REG_MASK2, 4, 4),
+ [F_CHRCHGIM] = REG_FIELD(RT9455_REG_MASK2, 3, 3),
+ [F_CH32MIM] = REG_FIELD(RT9455_REG_MASK2, 2, 2),
+ [F_CHTREGIM] = REG_FIELD(RT9455_REG_MASK2, 1, 1),
+ [F_CHMIVRIM] = REG_FIELD(RT9455_REG_MASK2, 0, 0),
+
+ [F_BSTVINOVIM] = REG_FIELD(RT9455_REG_MASK3, 7, 7),
+ [F_BSTOLIM] = REG_FIELD(RT9455_REG_MASK3, 6, 6),
+ [F_BSTLOWVIM] = REG_FIELD(RT9455_REG_MASK3, 5, 5),
+ [F_BST32SIM] = REG_FIELD(RT9455_REG_MASK3, 3, 3),
+};
+
+#define GET_MASK(fid) (BIT(rt9455_reg_fields[fid].msb + 1) - \
+ BIT(rt9455_reg_fields[fid].lsb))
+
+/*
+ * Each array initialised below shows the possible real-world values for a
+ * group of bits belonging to RT9455 registers. The arrays are sorted in
+ * ascending order. The index of each real-world value represents the value
+ * that is encoded in the group of bits belonging to RT9455 registers.
+ */
+/* REG06[6:4] (ICHRG) in uAh */
+static const int rt9455_ichrg_values[] = {
+ 500000, 650000, 800000, 950000, 1100000, 1250000, 1400000, 1550000
+};
+
+/*
+ * When the charger is in charge mode, REG02[7:2] represent battery regulation
+ * voltage.
+ */
+/* REG02[7:2] (VOREG) in uV */
+static const int rt9455_voreg_values[] = {
+ 3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000,
+ 3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000,
+ 3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000,
+ 3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000,
+ 4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000,
+ 4300000, 4330000, 4350000, 4370000, 4390000, 4410000, 4430000, 4450000,
+ 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000,
+ 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000
+};
+
+/*
+ * When the charger is in boost mode, REG02[7:2] represent boost output
+ * voltage.
+ */
+/* REG02[7:2] (Boost output voltage) in uV */
+static const int rt9455_boost_voltage_values[] = {
+ 4425000, 4450000, 4475000, 4500000, 4525000, 4550000, 4575000, 4600000,
+ 4625000, 4650000, 4675000, 4700000, 4725000, 4750000, 4775000, 4800000,
+ 4825000, 4850000, 4875000, 4900000, 4925000, 4950000, 4975000, 5000000,
+ 5025000, 5050000, 5075000, 5100000, 5125000, 5150000, 5175000, 5200000,
+ 5225000, 5250000, 5275000, 5300000, 5325000, 5350000, 5375000, 5400000,
+ 5425000, 5450000, 5475000, 5500000, 5525000, 5550000, 5575000, 5600000,
+ 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000,
+ 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000, 5600000,
+};
+
+/* REG07[3:0] (VMREG) in uV */
+static const int rt9455_vmreg_values[] = {
+ 4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4320000, 4340000,
+ 4360000, 4380000, 4400000, 4430000, 4450000, 4450000, 4450000, 4450000
+};
+
+/* REG05[5:4] (IEOC_PERCENTAGE) */
+static const int rt9455_ieoc_percentage_values[] = {
+ 10, 30, 20, 30
+};
+
+/* REG05[1:0] (MIVR) in uV */
+static const int rt9455_mivr_values[] = {
+ 4000000, 4250000, 4500000, 5000000
+};
+
+/* REG05[1:0] (IAICR) in uA */
+static const int rt9455_iaicr_values[] = {
+ 100000, 500000, 1000000, 2000000
+};
+
+struct rt9455_info {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct regmap_field *regmap_fields[F_MAX_FIELDS];
+ struct power_supply *charger;
+#if IS_ENABLED(CONFIG_USB_PHY)
+ struct usb_phy *usb_phy;
+ struct notifier_block nb;
+#endif
+ struct delayed_work pwr_rdy_work;
+ struct delayed_work max_charging_time_work;
+ struct delayed_work batt_presence_work;
+ u32 voreg;
+ u32 boost_voltage;
+};
+
+/*
+ * Iterate through each element of the 'tbl' array until an element whose value
+ * is greater than v is found. Return the index of the respective element,
+ * or the index of the last element in the array, if no such element is found.
+ */
+static unsigned int rt9455_find_idx(const int tbl[], int tbl_size, int v)
+{
+ int i;
+
+ /*
+ * No need to iterate until the last index in the table because
+ * if no element greater than v is found in the table,
+ * or if only the last element is greater than v,
+ * function returns the index of the last element.
+ */
+ for (i = 0; i < tbl_size - 1; i++)
+ if (v <= tbl[i])
+ return i;
+
+ return (tbl_size - 1);
+}
+
+static int rt9455_get_field_val(struct rt9455_info *info,
+ enum rt9455_fields field,
+ const int tbl[], int tbl_size, int *val)
+{
+ unsigned int v;
+ int ret;
+
+ ret = regmap_field_read(info->regmap_fields[field], &v);
+ if (ret)
+ return ret;
+
+ v = (v >= tbl_size) ? (tbl_size - 1) : v;
+ *val = tbl[v];
+
+ return 0;
+}
+
+static int rt9455_set_field_val(struct rt9455_info *info,
+ enum rt9455_fields field,
+ const int tbl[], int tbl_size, int val)
+{
+ unsigned int idx = rt9455_find_idx(tbl, tbl_size, val);
+
+ return regmap_field_write(info->regmap_fields[field], idx);
+}
+
+static int rt9455_register_reset(struct rt9455_info *info)
+{
+ struct device *dev = &info->client->dev;
+ unsigned int v;
+ int ret, limit = 100;
+
+ ret = regmap_field_write(info->regmap_fields[F_RST], 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set RST bit\n");
+ return ret;
+ }
+
+ /*
+ * To make sure that reset operation has finished, loop until RST bit
+ * is set to 0.
+ */
+ do {
+ ret = regmap_field_read(info->regmap_fields[F_RST], &v);
+ if (ret) {
+ dev_err(dev, "Failed to read RST bit\n");
+ return ret;
+ }
+
+ if (!v)
+ break;
+
+ usleep_range(10, 100);
+ } while (--limit);
+
+ if (!limit)
+ return -EIO;
+
+ return 0;
+}
+
+/* Charger power supply property routines */
+static enum power_supply_property rt9455_charger_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_SCOPE,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static char *rt9455_charger_supplied_to[] = {
+ "main-battery",
+};
+
+static int rt9455_charger_get_status(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ unsigned int v, pwr_rdy;
+ int ret;
+
+ ret = regmap_field_read(info->regmap_fields[F_PWR_RDY],
+ &pwr_rdy);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n");
+ return ret;
+ }
+
+ /*
+ * If PWR_RDY bit is unset, the battery is discharging. Otherwise,
+ * STAT bits value must be checked.
+ */
+ if (!pwr_rdy) {
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ return 0;
+ }
+
+ ret = regmap_field_read(info->regmap_fields[F_STAT], &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read STAT bits\n");
+ return ret;
+ }
+
+ switch (v) {
+ case 0:
+ /*
+ * If PWR_RDY bit is set, but STAT bits value is 0, the charger
+ * may be in one of the following cases:
+ * 1. CHG_EN bit is 0.
+ * 2. CHG_EN bit is 1 but the battery is not connected.
+ * In any of these cases, POWER_SUPPLY_STATUS_NOT_CHARGING is
+ * returned.
+ */
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ return 0;
+ case 1:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ return 0;
+ case 2:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ return 0;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ return 0;
+ }
+}
+
+static int rt9455_charger_get_health(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ struct device *dev = &info->client->dev;
+ unsigned int v;
+ int ret;
+
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return ret;
+ }
+
+ if (v & GET_MASK(F_TSDI)) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ return 0;
+ }
+ if (v & GET_MASK(F_VINOVPI)) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ }
+ if (v & GET_MASK(F_BATAB)) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ2 register\n");
+ return ret;
+ }
+
+ if (v & GET_MASK(F_CHBATOVI)) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & GET_MASK(F_CH32MI)) {
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ return 0;
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ3 register\n");
+ return ret;
+ }
+
+ if (v & GET_MASK(F_BSTBUSOVI)) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & GET_MASK(F_BSTOLI)) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ }
+ if (v & GET_MASK(F_BSTLOWVI)) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & GET_MASK(F_BST32SI)) {
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ return 0;
+ }
+
+ ret = regmap_field_read(info->regmap_fields[F_STAT], &v);
+ if (ret) {
+ dev_err(dev, "Failed to read STAT bits\n");
+ return ret;
+ }
+
+ if (v == RT9455_FAULT) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int rt9455_charger_get_battery_presence(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ unsigned int v;
+ int ret;
+
+ ret = regmap_field_read(info->regmap_fields[F_BATAB], &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read BATAB bit\n");
+ return ret;
+ }
+
+ /*
+ * Since BATAB is 1 when battery is NOT present and 0 otherwise,
+ * !BATAB is returned.
+ */
+ val->intval = !v;
+
+ return 0;
+}
+
+static int rt9455_charger_get_online(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ unsigned int v;
+ int ret;
+
+ ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n");
+ return ret;
+ }
+
+ val->intval = (int)v;
+
+ return 0;
+}
+
+static int rt9455_charger_get_current(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int curr;
+ int ret;
+
+ ret = rt9455_get_field_val(info, F_ICHRG,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values),
+ &curr);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read ICHRG value\n");
+ return ret;
+ }
+
+ val->intval = curr;
+
+ return 0;
+}
+
+static int rt9455_charger_get_current_max(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int idx = ARRAY_SIZE(rt9455_ichrg_values) - 1;
+
+ val->intval = rt9455_ichrg_values[idx];
+
+ return 0;
+}
+
+static int rt9455_charger_get_voltage(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int voltage;
+ int ret;
+
+ ret = rt9455_get_field_val(info, F_VOREG,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ &voltage);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read VOREG value\n");
+ return ret;
+ }
+
+ val->intval = voltage;
+
+ return 0;
+}
+
+static int rt9455_charger_get_voltage_max(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int idx = ARRAY_SIZE(rt9455_vmreg_values) - 1;
+
+ val->intval = rt9455_vmreg_values[idx];
+
+ return 0;
+}
+
+static int rt9455_charger_get_term_current(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ struct device *dev = &info->client->dev;
+ int ichrg, ieoc_percentage, ret;
+
+ ret = rt9455_get_field_val(info, F_ICHRG,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values),
+ &ichrg);
+ if (ret) {
+ dev_err(dev, "Failed to read ICHRG value\n");
+ return ret;
+ }
+
+ ret = rt9455_get_field_val(info, F_IEOC_PERCENTAGE,
+ rt9455_ieoc_percentage_values,
+ ARRAY_SIZE(rt9455_ieoc_percentage_values),
+ &ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Failed to read IEOC value\n");
+ return ret;
+ }
+
+ val->intval = ichrg * ieoc_percentage / 100;
+
+ return 0;
+}
+
+static int rt9455_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rt9455_info *info = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ return rt9455_charger_get_status(info, val);
+ case POWER_SUPPLY_PROP_HEALTH:
+ return rt9455_charger_get_health(info, val);
+ case POWER_SUPPLY_PROP_PRESENT:
+ return rt9455_charger_get_battery_presence(info, val);
+ case POWER_SUPPLY_PROP_ONLINE:
+ return rt9455_charger_get_online(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return rt9455_charger_get_current(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return rt9455_charger_get_current_max(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return rt9455_charger_get_voltage(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return rt9455_charger_get_voltage_max(info, val);
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return rt9455_charger_get_term_current(info, val);
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = RT9455_MODEL_NAME;
+ return 0;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = RT9455_MANUFACTURER;
+ return 0;
+ default:
+ return -ENODATA;
+ }
+}
+
+static int rt9455_hw_init(struct rt9455_info *info, u32 ichrg,
+ u32 ieoc_percentage,
+ u32 mivr, u32 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int idx, ret;
+
+ ret = rt9455_register_reset(info);
+ if (ret) {
+ dev_err(dev, "Power On Reset failed\n");
+ return ret;
+ }
+
+ /* Set TE bit in order to enable end of charge detection */
+ ret = regmap_field_write(info->regmap_fields[F_TE], 1);
+ if (ret) {
+ dev_err(dev, "Failed to set TE bit\n");
+ return ret;
+ }
+
+ /* Set TE_SHDN_EN bit in order to enable end of charge detection */
+ ret = regmap_field_write(info->regmap_fields[F_TE_SHDN_EN], 1);
+ if (ret) {
+ dev_err(dev, "Failed to set TE_SHDN_EN bit\n");
+ return ret;
+ }
+
+ /*
+ * Set BATD_EN bit in order to enable battery detection
+ * when charging is done
+ */
+ ret = regmap_field_write(info->regmap_fields[F_BATD_EN], 1);
+ if (ret) {
+ dev_err(dev, "Failed to set BATD_EN bit\n");
+ return ret;
+ }
+
+ /*
+ * Disable Safety Timer. In charge mode, this timer terminates charging
+ * if no read or write via I2C is done within 32 minutes. This timer
+ * avoids overcharging the baterry when the OS is not loaded and the
+ * charger is connected to a power source.
+ * In boost mode, this timer triggers BST32SI interrupt if no read or
+ * write via I2C is done within 32 seconds.
+ * When the OS is loaded and the charger driver is inserted, it is used
+ * delayed_work, named max_charging_time_work, to avoid overcharging
+ * the battery.
+ */
+ ret = regmap_field_write(info->regmap_fields[F_TMR_EN], 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to disable Safety Timer\n");
+ return ret;
+ }
+
+ /* Set ICHRG to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, F_ICHRG,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values), ichrg);
+ if (ret) {
+ dev_err(dev, "Failed to set ICHRG value\n");
+ return ret;
+ }
+
+ /* Set IEOC Percentage to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, F_IEOC_PERCENTAGE,
+ rt9455_ieoc_percentage_values,
+ ARRAY_SIZE(rt9455_ieoc_percentage_values),
+ ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Failed to set IEOC Percentage value\n");
+ return ret;
+ }
+
+ /* Set VOREG to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, F_VOREG,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ info->voreg);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG value\n");
+ return ret;
+ }
+
+ /* Set VMREG value to maximum (4.45V). */
+ idx = ARRAY_SIZE(rt9455_vmreg_values) - 1;
+ ret = rt9455_set_field_val(info, F_VMREG,
+ rt9455_vmreg_values,
+ ARRAY_SIZE(rt9455_vmreg_values),
+ rt9455_vmreg_values[idx]);
+ if (ret) {
+ dev_err(dev, "Failed to set VMREG value\n");
+ return ret;
+ }
+
+ /*
+ * Set MIVR to value retrieved from device-specific data.
+ * If no value is specified, default value for MIVR is 4.5V.
+ */
+ if (mivr == -1)
+ mivr = 4500000;
+
+ ret = rt9455_set_field_val(info, F_MIVR,
+ rt9455_mivr_values,
+ ARRAY_SIZE(rt9455_mivr_values), mivr);
+ if (ret) {
+ dev_err(dev, "Failed to set MIVR value\n");
+ return ret;
+ }
+
+ /*
+ * Set IAICR to value retrieved from device-specific data.
+ * If no value is specified, default value for IAICR is 500 mA.
+ */
+ if (iaicr == -1)
+ iaicr = 500000;
+
+ ret = rt9455_set_field_val(info, F_IAICR,
+ rt9455_iaicr_values,
+ ARRAY_SIZE(rt9455_iaicr_values), iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return ret;
+ }
+
+ /*
+ * Set IAICR_INT bit so that IAICR value is determined by IAICR bits
+ * and not by OTG pin.
+ */
+ ret = regmap_field_write(info->regmap_fields[F_IAICR_INT], 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR_INT bit\n");
+ return ret;
+ }
+
+ /*
+ * Disable CHMIVRI interrupt. Because the driver sets MIVR value,
+ * CHMIVRI is triggered, but there is no action to be taken by the
+ * driver when CHMIVRI is triggered.
+ */
+ ret = regmap_field_write(info->regmap_fields[F_CHMIVRIM], 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask CHMIVRI interrupt\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+/*
+ * Before setting the charger into boost mode, boost output voltage is
+ * set. This is needed because boost output voltage may differ from battery
+ * regulation voltage. F_VOREG bits represent either battery regulation voltage
+ * or boost output voltage, depending on the mode the charger is. Both battery
+ * regulation voltage and boost output voltage are read from DT/ACPI during
+ * probe.
+ */
+static int rt9455_set_boost_voltage_before_boost_mode(struct rt9455_info *info)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ ret = rt9455_set_field_val(info, F_VOREG,
+ rt9455_boost_voltage_values,
+ ARRAY_SIZE(rt9455_boost_voltage_values),
+ info->boost_voltage);
+ if (ret) {
+ dev_err(dev, "Failed to set boost output voltage value\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+/*
+ * Before setting the charger into charge mode, battery regulation voltage is
+ * set. This is needed because boost output voltage may differ from battery
+ * regulation voltage. F_VOREG bits represent either battery regulation voltage
+ * or boost output voltage, depending on the mode the charger is. Both battery
+ * regulation voltage and boost output voltage are read from DT/ACPI during
+ * probe.
+ */
+static int rt9455_set_voreg_before_charge_mode(struct rt9455_info *info)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ ret = rt9455_set_field_val(info, F_VOREG,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ info->voreg);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG value\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq1_register(struct rt9455_info *info,
+ bool *_is_battery_absent,
+ bool *_alert_userspace)
+{
+ unsigned int irq1, mask1, mask2;
+ struct device *dev = &info->client->dev;
+ bool is_battery_absent = false;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return ret;
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK1 register\n");
+ return ret;
+ }
+
+ if (irq1 & GET_MASK(F_TSDI)) {
+ dev_err(dev, "Thermal shutdown fault occurred\n");
+ alert_userspace = true;
+ }
+
+ if (irq1 & GET_MASK(F_VINOVPI)) {
+ dev_err(dev, "Overvoltage input occurred\n");
+ alert_userspace = true;
+ }
+
+ if (irq1 & GET_MASK(F_BATAB)) {
+ dev_err(dev, "Battery absence occurred\n");
+ is_battery_absent = true;
+ alert_userspace = true;
+
+ if ((mask1 & GET_MASK(F_BATABM)) == 0) {
+ ret = regmap_field_write(info->regmap_fields[F_BATABM],
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask BATAB interrupt\n");
+ return ret;
+ }
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK2 register\n");
+ return ret;
+ }
+
+ if (mask2 & GET_MASK(F_CHTERMIM)) {
+ ret = regmap_field_write(
+ info->regmap_fields[F_CHTERMIM], 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHTERMI interrupt\n");
+ return ret;
+ }
+ }
+
+ if (mask2 & GET_MASK(F_CHRCHGIM)) {
+ ret = regmap_field_write(
+ info->regmap_fields[F_CHRCHGIM], 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHRCHGI interrupt\n");
+ return ret;
+ }
+ }
+
+ /*
+ * When the battery is absent, max_charging_time_work is
+ * cancelled, since no charging is done.
+ */
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ /*
+ * Since no interrupt is triggered when the battery is
+ * reconnected, max_charging_time_work is not rescheduled.
+ * Therefore, batt_presence_work is scheduled to check whether
+ * the battery is still absent or not.
+ */
+ queue_delayed_work(system_power_efficient_wq,
+ &info->batt_presence_work,
+ RT9455_BATT_PRESENCE_DELAY * HZ);
+ }
+
+ *_is_battery_absent = is_battery_absent;
+
+ if (alert_userspace)
+ *_alert_userspace = alert_userspace;
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq2_register(struct rt9455_info *info,
+ bool is_battery_absent,
+ bool *_alert_userspace)
+{
+ unsigned int irq2, mask2;
+ struct device *dev = &info->client->dev;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ2, &irq2);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ2 register\n");
+ return ret;
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_MASK2, &mask2);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK2 register\n");
+ return ret;
+ }
+
+ if (irq2 & GET_MASK(F_CHRVPI)) {
+ dev_dbg(dev, "Charger fault occurred\n");
+ alert_userspace = true;
+ /*
+ * CHRVPI bit is set in 2 cases:
+ * 1. when the power source is connected to the charger.
+ * 2. when the power source is disconnected from the charger.
+ * To identify the case, PWR_RDY bit is checked. Because
+ * PWR_RDY bit is set / cleared after CHRVPI interrupt is
+ * triggered, it is used delayed_work to later read PWR_RDY bit.
+ */
+ queue_delayed_work(system_power_efficient_wq,
+ &info->pwr_rdy_work,
+ RT9455_PWR_RDY_DELAY * HZ);
+ }
+ if (irq2 & GET_MASK(F_CHBATOVI)) {
+ dev_err(dev, "Battery OVP occurred\n");
+ alert_userspace = true;
+ }
+ if (irq2 & GET_MASK(F_CHTERMI)) {
+ dev_dbg(dev, "Charge terminated\n");
+ if (!is_battery_absent) {
+ if ((mask2 & GET_MASK(F_CHTERMIM)) == 0) {
+ ret = regmap_field_write(
+ info->regmap_fields[F_CHTERMIM], 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask CHTERMI interrupt\n");
+ return ret;
+ }
+ /*
+ * Update MASK2 value, since CHTERMIM bit is
+ * set.
+ */
+ mask2 = mask2 | GET_MASK(F_CHTERMIM);
+ }
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ alert_userspace = true;
+ }
+ }
+ if (irq2 & GET_MASK(F_CHRCHGI)) {
+ dev_dbg(dev, "Recharge request\n");
+ ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
+ RT9455_CHARGE_ENABLE);
+ if (ret) {
+ dev_err(dev, "Failed to enable charging\n");
+ return ret;
+ }
+ if (mask2 & GET_MASK(F_CHTERMIM)) {
+ ret = regmap_field_write(
+ info->regmap_fields[F_CHTERMIM], 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHTERMI interrupt\n");
+ return ret;
+ }
+ /* Update MASK2 value, since CHTERMIM bit is cleared. */
+ mask2 = mask2 & ~GET_MASK(F_CHTERMIM);
+ }
+ if (!is_battery_absent) {
+ /*
+ * No need to check whether the charger is connected to
+ * power source when CHRCHGI is received, since CHRCHGI
+ * is not triggered if the charger is not connected to
+ * the power source.
+ */
+ queue_delayed_work(system_power_efficient_wq,
+ &info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+ alert_userspace = true;
+ }
+ }
+ if (irq2 & GET_MASK(F_CH32MI)) {
+ dev_err(dev, "Charger fault. 32 mins timeout occurred\n");
+ alert_userspace = true;
+ }
+ if (irq2 & GET_MASK(F_CHTREGI)) {
+ dev_warn(dev,
+ "Charger warning. Thermal regulation loop active\n");
+ alert_userspace = true;
+ }
+ if (irq2 & GET_MASK(F_CHMIVRI)) {
+ dev_dbg(dev,
+ "Charger warning. Input voltage MIVR loop active\n");
+ }
+
+ if (alert_userspace)
+ *_alert_userspace = alert_userspace;
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq3_register(struct rt9455_info *info,
+ bool *_alert_userspace)
+{
+ unsigned int irq3, mask3;
+ struct device *dev = &info->client->dev;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ3, &irq3);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ3 register\n");
+ return ret;
+ }
+
+ ret = regmap_read(info->regmap, RT9455_REG_MASK3, &mask3);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK3 register\n");
+ return ret;
+ }
+
+ if (irq3 & GET_MASK(F_BSTBUSOVI)) {
+ dev_err(dev, "Boost fault. Overvoltage input occurred\n");
+ alert_userspace = true;
+ }
+ if (irq3 & GET_MASK(F_BSTOLI)) {
+ dev_err(dev, "Boost fault. Overload\n");
+ alert_userspace = true;
+ }
+ if (irq3 & GET_MASK(F_BSTLOWVI)) {
+ dev_err(dev, "Boost fault. Battery voltage too low\n");
+ alert_userspace = true;
+ }
+ if (irq3 & GET_MASK(F_BST32SI)) {
+ dev_err(dev, "Boost fault. 32 seconds timeout occurred.\n");
+ alert_userspace = true;
+ }
+
+ if (alert_userspace) {
+ dev_info(dev, "Boost fault occurred, therefore the charger goes into charge mode\n");
+ ret = rt9455_set_voreg_before_charge_mode(info);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG before entering charge mode\n");
+ return ret;
+ }
+ ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return ret;
+ }
+ *_alert_userspace = alert_userspace;
+ }
+
+ return 0;
+}
+
+static irqreturn_t rt9455_irq_handler_thread(int irq, void *data)
+{
+ struct rt9455_info *info = data;
+ struct device *dev;
+ bool alert_userspace = false;
+ bool is_battery_absent = false;
+ unsigned int status;
+ int ret;
+
+ if (!info)
+ return IRQ_NONE;
+
+ dev = &info->client->dev;
+
+ if (irq != info->client->irq) {
+ dev_err(dev, "Interrupt is not for RT9455 charger\n");
+ return IRQ_NONE;
+ }
+
+ ret = regmap_field_read(info->regmap_fields[F_STAT], &status);
+ if (ret) {
+ dev_err(dev, "Failed to read STAT bits\n");
+ return IRQ_HANDLED;
+ }
+ dev_dbg(dev, "Charger status is %d\n", status);
+
+ /*
+ * Each function that processes an IRQ register receives as output
+ * parameter alert_userspace pointer. alert_userspace is set to true
+ * in such a function only if an interrupt has occurred in the
+ * respective interrupt register. This way, it is avoided the following
+ * case: interrupt occurs only in IRQ1 register,
+ * rt9455_irq_handler_check_irq1_register() function sets to true
+ * alert_userspace, but rt9455_irq_handler_check_irq2_register()
+ * and rt9455_irq_handler_check_irq3_register() functions set to false
+ * alert_userspace and power_supply_changed() is never called.
+ */
+ ret = rt9455_irq_handler_check_irq1_register(info, &is_battery_absent,
+ &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ1 register\n");
+ return IRQ_HANDLED;
+ }
+
+ ret = rt9455_irq_handler_check_irq2_register(info, is_battery_absent,
+ &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ2 register\n");
+ return IRQ_HANDLED;
+ }
+
+ ret = rt9455_irq_handler_check_irq3_register(info, &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ3 register\n");
+ return IRQ_HANDLED;
+ }
+
+ if (alert_userspace) {
+ /*
+ * Sometimes, an interrupt occurs while rt9455_probe() function
+ * is executing and power_supply_register() is not yet called.
+ * Do not call power_supply_charged() in this case.
+ */
+ if (info->charger)
+ power_supply_changed(info->charger);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int rt9455_discover_charger(struct rt9455_info *info, u32 *ichrg,
+ u32 *ieoc_percentage,
+ u32 *mivr, u32 *iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (!dev->of_node && !ACPI_HANDLE(dev)) {
+ dev_err(dev, "No support for either device tree or ACPI\n");
+ return -EINVAL;
+ }
+ /*
+ * ICHRG, IEOC_PERCENTAGE, VOREG and boost output voltage are mandatory
+ * parameters.
+ */
+ ret = device_property_read_u32(dev, "richtek,output-charge-current",
+ ichrg);
+ if (ret) {
+ dev_err(dev, "Error: missing \"output-charge-current\" property\n");
+ return ret;
+ }
+
+ ret = device_property_read_u32(dev, "richtek,end-of-charge-percentage",
+ ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Error: missing \"end-of-charge-percentage\" property\n");
+ return ret;
+ }
+
+ ret = device_property_read_u32(dev,
+ "richtek,battery-regulation-voltage",
+ &info->voreg);
+ if (ret) {
+ dev_err(dev, "Error: missing \"battery-regulation-voltage\" property\n");
+ return ret;
+ }
+
+ ret = device_property_read_u32(dev, "richtek,boost-output-voltage",
+ &info->boost_voltage);
+ if (ret) {
+ dev_err(dev, "Error: missing \"boost-output-voltage\" property\n");
+ return ret;
+ }
+
+ /*
+ * MIVR and IAICR are optional parameters. Do not return error if one of
+ * them is not present in ACPI table or device tree specification.
+ */
+ device_property_read_u32(dev, "richtek,min-input-voltage-regulation",
+ mivr);
+ device_property_read_u32(dev, "richtek,avg-input-current-regulation",
+ iaicr);
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+static int rt9455_usb_event_none(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ ret = rt9455_set_voreg_before_charge_mode(info);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG before entering charge mode\n");
+ return ret;
+ }
+ /*
+ * If the charger is in boost mode, and it has received
+ * USB_EVENT_NONE, this means the consumer device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_NONE received, therefore the charger goes into charge mode\n");
+ ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_NONE received, therefore IAICR is set to its minimum value\n");
+ if (iaicr != RT9455_IAICR_100MA) {
+ ret = regmap_field_write(info->regmap_fields[F_IAICR],
+ RT9455_IAICR_100MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_vbus(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ ret = rt9455_set_voreg_before_charge_mode(info);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG before entering charge mode\n");
+ return ret;
+ }
+ /*
+ * If the charger is in boost mode, and it has received
+ * USB_EVENT_VBUS, this means the consumer device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_VBUS received, therefore the charger goes into charge mode\n");
+ ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_VBUS received, therefore IAICR is set to 500 mA\n");
+ if (iaicr != RT9455_IAICR_500MA) {
+ ret = regmap_field_write(info->regmap_fields[F_IAICR],
+ RT9455_IAICR_500MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_id(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_CHARGE_MODE) {
+ ret = rt9455_set_boost_voltage_before_boost_mode(info);
+ if (ret) {
+ dev_err(dev, "Failed to set boost output voltage before entering boost mode\n");
+ return ret;
+ }
+ /*
+ * If the charger is in charge mode, and it has received
+ * USB_EVENT_ID, this means a consumer device is connected and
+ * it should be powered by the charger.
+ * In this case, the charger goes into boost mode.
+ */
+ dev_dbg(dev, "USB_EVENT_ID received, therefore the charger goes into boost mode\n");
+ ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
+ RT9455_BOOST_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in boost mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_ID received, therefore IAICR is set to its minimum value\n");
+ if (iaicr != RT9455_IAICR_100MA) {
+ ret = regmap_field_write(info->regmap_fields[F_IAICR],
+ RT9455_IAICR_100MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_charger(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ ret = rt9455_set_voreg_before_charge_mode(info);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG before entering charge mode\n");
+ return ret;
+ }
+ /*
+ * If the charger is in boost mode, and it has received
+ * USB_EVENT_CHARGER, this means the consumer device powered by
+ * the charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_CHARGER received, therefore the charger goes into charge mode\n");
+ ret = regmap_field_write(info->regmap_fields[F_OPA_MODE],
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_CHARGER received, therefore IAICR is set to no current limit\n");
+ if (iaicr != RT9455_IAICR_NO_LIMIT) {
+ ret = regmap_field_write(info->regmap_fields[F_IAICR],
+ RT9455_IAICR_NO_LIMIT);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event(struct notifier_block *nb,
+ unsigned long event, void *power)
+{
+ struct rt9455_info *info = container_of(nb, struct rt9455_info, nb);
+ struct device *dev = &info->client->dev;
+ unsigned int opa_mode, iaicr;
+ int ret;
+
+ /*
+ * Determine whether the charger is in charge mode
+ * or in boost mode.
+ */
+ ret = regmap_field_read(info->regmap_fields[F_OPA_MODE],
+ &opa_mode);
+ if (ret) {
+ dev_err(dev, "Failed to read OPA_MODE value\n");
+ return NOTIFY_DONE;
+ }
+
+ ret = regmap_field_read(info->regmap_fields[F_IAICR],
+ &iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to read IAICR value\n");
+ return NOTIFY_DONE;
+ }
+
+ dev_dbg(dev, "Received USB event %lu\n", event);
+ switch (event) {
+ case USB_EVENT_NONE:
+ return rt9455_usb_event_none(info, opa_mode, iaicr);
+ case USB_EVENT_VBUS:
+ return rt9455_usb_event_vbus(info, opa_mode, iaicr);
+ case USB_EVENT_ID:
+ return rt9455_usb_event_id(info, opa_mode, iaicr);
+ case USB_EVENT_CHARGER:
+ return rt9455_usb_event_charger(info, opa_mode, iaicr);
+ default:
+ dev_err(dev, "Unknown USB event\n");
+ }
+ return NOTIFY_DONE;
+}
+#endif
+
+static void rt9455_pwr_rdy_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ pwr_rdy_work.work);
+ struct device *dev = &info->client->dev;
+ unsigned int pwr_rdy;
+ int ret;
+
+ ret = regmap_field_read(info->regmap_fields[F_PWR_RDY], &pwr_rdy);
+ if (ret) {
+ dev_err(dev, "Failed to read PWR_RDY bit\n");
+ return;
+ }
+ switch (pwr_rdy) {
+ case RT9455_PWR_FAULT:
+ dev_dbg(dev, "Charger disconnected from power source\n");
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ break;
+ case RT9455_PWR_GOOD:
+ dev_dbg(dev, "Charger connected to power source\n");
+ ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
+ RT9455_CHARGE_ENABLE);
+ if (ret) {
+ dev_err(dev, "Failed to enable charging\n");
+ return;
+ }
+ queue_delayed_work(system_power_efficient_wq,
+ &info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+ break;
+ }
+}
+
+static void rt9455_max_charging_time_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ max_charging_time_work.work);
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ dev_err(dev, "Battery has been charging for at least 6 hours and is not yet fully charged. Battery is dead, therefore charging is disabled.\n");
+ ret = regmap_field_write(info->regmap_fields[F_CHG_EN],
+ RT9455_CHARGE_DISABLE);
+ if (ret)
+ dev_err(dev, "Failed to disable charging\n");
+}
+
+static void rt9455_batt_presence_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ batt_presence_work.work);
+ struct device *dev = &info->client->dev;
+ unsigned int irq1, mask1;
+ int ret;
+
+ ret = regmap_read(info->regmap, RT9455_REG_IRQ1, &irq1);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return;
+ }
+
+ /*
+ * If the battery is still absent, batt_presence_work is rescheduled.
+ * Otherwise, max_charging_time is scheduled.
+ */
+ if (irq1 & GET_MASK(F_BATAB)) {
+ queue_delayed_work(system_power_efficient_wq,
+ &info->batt_presence_work,
+ RT9455_BATT_PRESENCE_DELAY * HZ);
+ } else {
+ queue_delayed_work(system_power_efficient_wq,
+ &info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+
+ ret = regmap_read(info->regmap, RT9455_REG_MASK1, &mask1);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK1 register\n");
+ return;
+ }
+
+ if (mask1 & GET_MASK(F_BATABM)) {
+ ret = regmap_field_write(info->regmap_fields[F_BATABM],
+ 0x00);
+ if (ret)
+ dev_err(dev, "Failed to unmask BATAB interrupt\n");
+ }
+ }
+}
+
+static const struct power_supply_desc rt9455_charger_desc = {
+ .name = RT9455_DRIVER_NAME,
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = rt9455_charger_properties,
+ .num_properties = ARRAY_SIZE(rt9455_charger_properties),
+ .get_property = rt9455_charger_get_property,
+};
+
+static bool rt9455_is_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RT9455_REG_DEV_ID:
+ case RT9455_REG_IRQ1:
+ case RT9455_REG_IRQ2:
+ case RT9455_REG_IRQ3:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static bool rt9455_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RT9455_REG_DEV_ID:
+ case RT9455_REG_CTRL5:
+ case RT9455_REG_CTRL6:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static const struct regmap_config rt9455_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = rt9455_is_writeable_reg,
+ .volatile_reg = rt9455_is_volatile_reg,
+ .max_register = RT9455_REG_MASK3,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int rt9455_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct device *dev = &client->dev;
+ struct rt9455_info *info;
+ struct power_supply_config rt9455_charger_config = {};
+ /*
+ * Mandatory device-specific data values. Also, VOREG and boost output
+ * voltage are mandatory values, but they are stored in rt9455_info
+ * structure.
+ */
+ u32 ichrg, ieoc_percentage;
+ /* Optional device-specific data values. */
+ u32 mivr = -1, iaicr = -1;
+ int i, ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
+ return -ENODEV;
+ }
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->client = client;
+ i2c_set_clientdata(client, info);
+
+ info->regmap = devm_regmap_init_i2c(client,
+ &rt9455_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ dev_err(dev, "Failed to initialize register map\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < F_MAX_FIELDS; i++) {
+ info->regmap_fields[i] =
+ devm_regmap_field_alloc(dev, info->regmap,
+ rt9455_reg_fields[i]);
+ if (IS_ERR(info->regmap_fields[i])) {
+ dev_err(dev,
+ "Failed to allocate regmap field = %d\n", i);
+ return PTR_ERR(info->regmap_fields[i]);
+ }
+ }
+
+ ret = rt9455_discover_charger(info, &ichrg, &ieoc_percentage,
+ &mivr, &iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to discover charger\n");
+ return ret;
+ }
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+ info->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(info->usb_phy)) {
+ dev_err(dev, "Failed to get USB transceiver\n");
+ } else {
+ info->nb.notifier_call = rt9455_usb_event;
+ ret = usb_register_notifier(info->usb_phy, &info->nb);
+ if (ret) {
+ dev_err(dev, "Failed to register USB notifier\n");
+ /*
+ * If usb_register_notifier() fails, set notifier_call
+ * to NULL, to avoid calling usb_unregister_notifier().
+ */
+ info->nb.notifier_call = NULL;
+ }
+ }
+#endif
+
+ INIT_DEFERRABLE_WORK(&info->pwr_rdy_work, rt9455_pwr_rdy_work_callback);
+ INIT_DEFERRABLE_WORK(&info->max_charging_time_work,
+ rt9455_max_charging_time_work_callback);
+ INIT_DEFERRABLE_WORK(&info->batt_presence_work,
+ rt9455_batt_presence_work_callback);
+
+ rt9455_charger_config.of_node = dev->of_node;
+ rt9455_charger_config.drv_data = info;
+ rt9455_charger_config.supplied_to = rt9455_charger_supplied_to;
+ rt9455_charger_config.num_supplicants =
+ ARRAY_SIZE(rt9455_charger_supplied_to);
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ rt9455_irq_handler_thread,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ RT9455_DRIVER_NAME, info);
+ if (ret) {
+ dev_err(dev, "Failed to register IRQ handler\n");
+ goto put_usb_notifier;
+ }
+
+ ret = rt9455_hw_init(info, ichrg, ieoc_percentage, mivr, iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to set charger to its default values\n");
+ goto put_usb_notifier;
+ }
+
+ info->charger = devm_power_supply_register(dev, &rt9455_charger_desc,
+ &rt9455_charger_config);
+ if (IS_ERR(info->charger)) {
+ dev_err(dev, "Failed to register charger\n");
+ ret = PTR_ERR(info->charger);
+ goto put_usb_notifier;
+ }
+
+ return 0;
+
+put_usb_notifier:
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (info->nb.notifier_call) {
+ usb_unregister_notifier(info->usb_phy, &info->nb);
+ info->nb.notifier_call = NULL;
+ }
+#endif
+ return ret;
+}
+
+static int rt9455_remove(struct i2c_client *client)
+{
+ int ret;
+ struct rt9455_info *info = i2c_get_clientdata(client);
+
+ ret = rt9455_register_reset(info);
+ if (ret)
+ dev_err(&info->client->dev, "Failed to set charger to its default values\n");
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (info->nb.notifier_call)
+ usb_unregister_notifier(info->usb_phy, &info->nb);
+#endif
+
+ cancel_delayed_work_sync(&info->pwr_rdy_work);
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ cancel_delayed_work_sync(&info->batt_presence_work);
+
+ return ret;
+}
+
+static const struct i2c_device_id rt9455_i2c_id_table[] = {
+ { RT9455_DRIVER_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, rt9455_i2c_id_table);
+
+static const struct of_device_id rt9455_of_match[] = {
+ { .compatible = "richtek,rt9455", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rt9455_of_match);
+
+static const struct acpi_device_id rt9455_i2c_acpi_match[] = {
+ { "RT945500", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, rt9455_i2c_acpi_match);
+
+static struct i2c_driver rt9455_driver = {
+ .probe = rt9455_probe,
+ .remove = rt9455_remove,
+ .id_table = rt9455_i2c_id_table,
+ .driver = {
+ .name = RT9455_DRIVER_NAME,
+ .of_match_table = of_match_ptr(rt9455_of_match),
+ .acpi_match_table = ACPI_PTR(rt9455_i2c_acpi_match),
+ },
+};
+module_i2c_driver(rt9455_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Anda-Maria Nicolae <anda-maria.nicolae@intel.com>");
+MODULE_ALIAS("i2c:rt9455-charger");
+MODULE_DESCRIPTION("Richtek RT9455 Charger Driver");
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/of.h>
+#include <linux/stat.h>
#include <linux/power/sbs-battery.h>
static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1];
+static bool force_load;
static int sbs_read_word_data(struct i2c_client *client, u8 address)
{
skip_gpio:
/*
- * Before we register, we need to make sure we can actually talk
+ * Before we register, we might need to make sure we can actually talk
* to the battery.
*/
- rc = sbs_read_word_data(client, sbs_data[REG_STATUS].addr);
- if (rc < 0) {
- dev_err(&client->dev, "%s: Failed to get device status\n",
- __func__);
- goto exit_psupply;
+ if (!force_load) {
+ rc = sbs_read_word_data(client, sbs_data[REG_STATUS].addr);
+
+ if (rc < 0) {
+ dev_err(&client->dev, "%s: Failed to get device status\n",
+ __func__);
+ goto exit_psupply;
+ }
}
chip->power_supply = power_supply_register(&client->dev, sbs_desc,
MODULE_DESCRIPTION("SBS battery monitor driver");
MODULE_LICENSE("GPL");
+
+module_param(force_load, bool, S_IRUSR | S_IRGRP | S_IROTH);
+MODULE_PARM_DESC(force_load,
+ "Attempt to load the driver even if no battery is connected");
return ret;
err_bat_irq:
+ --i;
for (; i >= 0; i--) {
irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
free_irq(irq, power);
int thermistor_curve[MAX_THERM_CURVE_SIZE][2];
};
+struct axp20x_chrg_pdata {
+ int max_cc;
+ int max_cv;
+ int def_cc;
+ int def_cv;
+};
+
#endif /* __LINUX_MFD_AXP20X_H */
* the datasheet although it can be changed by board designers.
*/
unsigned int r_sns;
+ int vmin; /* in millivolts */
+ int vmax; /* in millivolts */
+ int temp_min; /* in tenths of degree Celsius */
+ int temp_max; /* in tenths of degree Celsius */
};
#endif /* __MAX17042_BATTERY_H_ */
int (*set_property)(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val);
+ /*
+ * property_is_writeable() will be called during registration
+ * of power supply. If this happens during device probe then it must
+ * not access internal data of device (because probe did not end).
+ */
int (*property_is_writeable)(struct power_supply *psy,
enum power_supply_property psp);
void (*external_power_changed)(struct power_supply *psy);
/* private */
struct device dev;
struct work_struct changed_work;
+ struct delayed_work deferred_register_work;
spinlock_t changed_lock;
bool changed;
atomic_t use_cnt;
#ifdef CONFIG_OF
extern struct power_supply *power_supply_get_by_phandle(struct device_node *np,
const char *property);
+extern struct power_supply *devm_power_supply_get_by_phandle(
+ struct device *dev, const char *property);
#else /* !CONFIG_OF */
static inline struct power_supply *
power_supply_get_by_phandle(struct device_node *np, const char *property)
{ return NULL; }
+static inline struct power_supply *
+devm_power_supply_get_by_phandle(struct device *dev, const char *property)
+{ return NULL; }
#endif /* CONFIG_OF */
extern void power_supply_changed(struct power_supply *psy);
extern int power_supply_am_i_supplied(struct power_supply *psy);
git.openpandora.org / pandora-kernel.git / commitdiff