S: Supported
F: fs/reiserfs/
+REGISTER MAP ABSTRACTION
+M: Mark Brown <broonie@opensource.wolfsonmicro.com>
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
+S: Supported
+F: drivers/base/regmap/
+F: include/linux/regmap.h
+
RFKILL
M: Johannes Berg <johannes@sipsolutions.net>
L: linux-wireless@vger.kernel.org
bool
default n
+source "drivers/base/regmap/Kconfig"
+
endmenu
obj-$(CONFIG_MODULES) += module.o
endif
obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o
+obj-$(CONFIG_REGMAP) += regmap/
ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
--- /dev/null
+# Generic register map support. There are no user servicable options here,
+# this is an API intended to be used by other kernel subsystems. These
+# subsystems should select the appropriate symbols.
+
+config REGMAP
+ default y if (REGMAP_I2C || REGMAP_SPI)
+ bool
+
+config REGMAP_I2C
+ tristate
+
+config REGMAP_SPI
+ tristate
--- /dev/null
+obj-$(CONFIG_REGMAP) += regmap.o
+obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o
+obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o
--- /dev/null
+/*
+ * Register map access API - I2C support
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
+ */
+
+#include <linux/regmap.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+static int regmap_i2c_write(struct device *dev, const void *data, size_t count)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_master_send(i2c, data, count);
+ if (ret == count)
+ return 0;
+ else if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
+static int regmap_i2c_gather_write(struct device *dev,
+ const void *reg, size_t reg_size,
+ const void *val, size_t val_size)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct i2c_msg xfer[2];
+ int ret;
+
+ /* If the I2C controller can't do a gather tell the core, it
+ * will substitute in a linear write for us.
+ */
+ if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_PROTOCOL_MANGLING))
+ return -ENOTSUPP;
+
+ xfer[0].addr = i2c->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = reg_size;
+ xfer[0].buf = (void *)reg;
+
+ xfer[1].addr = i2c->addr;
+ xfer[1].flags = I2C_M_NOSTART;
+ xfer[1].len = val_size;
+ xfer[1].buf = (void *)val;
+
+ ret = i2c_transfer(i2c->adapter, xfer, 2);
+ if (ret == 2)
+ return 0;
+ if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
+static int regmap_i2c_read(struct device *dev,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct i2c_msg xfer[2];
+ int ret;
+
+ xfer[0].addr = i2c->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = reg_size;
+ xfer[0].buf = (void *)reg;
+
+ xfer[1].addr = i2c->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = val_size;
+ xfer[1].buf = val;
+
+ ret = i2c_transfer(i2c->adapter, xfer, 2);
+ if (ret == 2)
+ return 0;
+ else if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
+static struct regmap_bus regmap_i2c = {
+ .type = &i2c_bus_type,
+ .write = regmap_i2c_write,
+ .gather_write = regmap_i2c_gather_write,
+ .read = regmap_i2c_read,
+ .owner = THIS_MODULE,
+};
+
+/**
+ * regmap_init_i2c(): Initialise register map
+ *
+ * @i2c: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_i2c(struct i2c_client *i2c,
+ const struct regmap_config *config)
+{
+ return regmap_init(&i2c->dev, ®map_i2c, config);
+}
+EXPORT_SYMBOL_GPL(regmap_init_i2c);
+
--- /dev/null
+/*
+ * Register map access API - SPI support
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
+ */
+
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <linux/init.h>
+
+static int regmap_spi_write(struct device *dev, const void *data, size_t count)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ return spi_write(spi, data, count);
+}
+
+static int regmap_spi_gather_write(struct device *dev,
+ const void *reg, size_t reg_len,
+ const void *val, size_t val_len)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct spi_message m;
+ struct spi_transfer t[2] = { { .tx_buf = reg, .len = reg_len, },
+ { .tx_buf = val, .len = val_len, }, };
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t[0], &m);
+ spi_message_add_tail(&t[1], &m);
+
+ return spi_sync(spi, &m);
+}
+
+static int regmap_spi_read(struct device *dev,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ return spi_write_then_read(spi, reg, reg_size, val, val_size);
+}
+
+static struct regmap_bus regmap_spi = {
+ .type = &spi_bus_type,
+ .write = regmap_spi_write,
+ .gather_write = regmap_spi_gather_write,
+ .read = regmap_spi_read,
+ .owner = THIS_MODULE,
+ .read_flag_mask = 0x80,
+};
+
+/**
+ * regmap_init_spi(): Initialise register map
+ *
+ * @spi: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_spi(struct spi_device *spi,
+ const struct regmap_config *config)
+{
+ return regmap_init(&spi->dev, ®map_spi, config);
+}
+EXPORT_SYMBOL_GPL(regmap_init_spi);
--- /dev/null
+/*
+ * Register map access API
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+
+#include <linux/regmap.h>
+
+struct regmap;
+
+struct regmap_format {
+ size_t buf_size;
+ size_t reg_bytes;
+ size_t val_bytes;
+ void (*format_write)(struct regmap *map,
+ unsigned int reg, unsigned int val);
+ void (*format_reg)(void *buf, unsigned int reg);
+ void (*format_val)(void *buf, unsigned int val);
+ unsigned int (*parse_val)(void *buf);
+};
+
+struct regmap {
+ struct mutex lock;
+
+ struct device *dev; /* Device we do I/O on */
+ void *work_buf; /* Scratch buffer used to format I/O */
+ struct regmap_format format; /* Buffer format */
+ const struct regmap_bus *bus;
+};
+
+static void regmap_format_4_12_write(struct regmap *map,
+ unsigned int reg, unsigned int val)
+{
+ __be16 *out = map->work_buf;
+ *out = cpu_to_be16((reg << 12) | val);
+}
+
+static void regmap_format_7_9_write(struct regmap *map,
+ unsigned int reg, unsigned int val)
+{
+ __be16 *out = map->work_buf;
+ *out = cpu_to_be16((reg << 9) | val);
+}
+
+static void regmap_format_8(void *buf, unsigned int val)
+{
+ u8 *b = buf;
+
+ b[0] = val;
+}
+
+static void regmap_format_16(void *buf, unsigned int val)
+{
+ __be16 *b = buf;
+
+ b[0] = cpu_to_be16(val);
+}
+
+static unsigned int regmap_parse_8(void *buf)
+{
+ u8 *b = buf;
+
+ return b[0];
+}
+
+static unsigned int regmap_parse_16(void *buf)
+{
+ __be16 *b = buf;
+
+ b[0] = be16_to_cpu(b[0]);
+
+ return b[0];
+}
+
+/**
+ * regmap_init(): Initialise register map
+ *
+ * @dev: Device that will be interacted with
+ * @bus: Bus-specific callbacks to use with device
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap. This function should generally not be called
+ * directly, it should be called by bus-specific init functions.
+ */
+struct regmap *regmap_init(struct device *dev,
+ const struct regmap_bus *bus,
+ const struct regmap_config *config)
+{
+ struct regmap *map;
+ int ret = -EINVAL;
+
+ if (!bus || !config)
+ return NULL;
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (map == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ mutex_init(&map->lock);
+ map->format.buf_size = (config->reg_bits + config->val_bits) / 8;
+ map->format.reg_bytes = config->reg_bits / 8;
+ map->format.val_bytes = config->val_bits / 8;
+ map->dev = dev;
+ map->bus = bus;
+
+ switch (config->reg_bits) {
+ case 4:
+ switch (config->val_bits) {
+ case 12:
+ map->format.format_write = regmap_format_4_12_write;
+ break;
+ default:
+ goto err_map;
+ }
+ break;
+
+ case 7:
+ switch (config->val_bits) {
+ case 9:
+ map->format.format_write = regmap_format_7_9_write;
+ break;
+ default:
+ goto err_map;
+ }
+ break;
+
+ case 8:
+ map->format.format_reg = regmap_format_8;
+ break;
+
+ case 16:
+ map->format.format_reg = regmap_format_16;
+ break;
+
+ default:
+ goto err_map;
+ }
+
+ switch (config->val_bits) {
+ case 8:
+ map->format.format_val = regmap_format_8;
+ map->format.parse_val = regmap_parse_8;
+ break;
+ case 16:
+ map->format.format_val = regmap_format_16;
+ map->format.parse_val = regmap_parse_16;
+ break;
+ }
+
+ if (!map->format.format_write &&
+ !(map->format.format_reg && map->format.format_val))
+ goto err_map;
+
+ map->work_buf = kmalloc(map->format.buf_size, GFP_KERNEL);
+ if (map->work_buf == NULL) {
+ ret = -ENOMEM;
+ goto err_bus;
+ }
+
+ return map;
+
+err_bus:
+ module_put(map->bus->owner);
+err_map:
+ kfree(map);
+err:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(regmap_init);
+
+/**
+ * regmap_exit(): Free a previously allocated register map
+ */
+void regmap_exit(struct regmap *map)
+{
+ kfree(map->work_buf);
+ module_put(map->bus->owner);
+ kfree(map);
+}
+EXPORT_SYMBOL_GPL(regmap_exit);
+
+static int _regmap_raw_write(struct regmap *map, unsigned int reg,
+ const void *val, size_t val_len)
+{
+ void *buf;
+ int ret = -ENOTSUPP;
+ size_t len;
+
+ map->format.format_reg(map->work_buf, reg);
+
+ /* Try to do a gather write if we can */
+ if (map->bus->gather_write)
+ ret = map->bus->gather_write(map->dev, map->work_buf,
+ map->format.reg_bytes,
+ val, val_len);
+
+ /* Otherwise fall back on linearising by hand. */
+ if (ret == -ENOTSUPP) {
+ len = map->format.reg_bytes + val_len;
+ buf = kmalloc(len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ memcpy(buf, map->work_buf, map->format.reg_bytes);
+ memcpy(buf + map->format.reg_bytes, val, val_len);
+ ret = map->bus->write(map->dev, buf, len);
+
+ kfree(buf);
+ }
+
+ return ret;
+}
+
+static int _regmap_write(struct regmap *map, unsigned int reg,
+ unsigned int val)
+{
+ BUG_ON(!map->format.format_write && !map->format.format_val);
+
+ if (map->format.format_write) {
+ map->format.format_write(map, reg, val);
+
+ return map->bus->write(map->dev, map->work_buf,
+ map->format.buf_size);
+ } else {
+ map->format.format_val(map->work_buf + map->format.reg_bytes,
+ val);
+ return _regmap_raw_write(map, reg,
+ map->work_buf + map->format.reg_bytes,
+ map->format.val_bytes);
+ }
+}
+
+/**
+ * regmap_write(): Write a value to a single register
+ *
+ * @map: Register map to write to
+ * @reg: Register to write to
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&map->lock);
+
+ ret = _regmap_write(map, reg, val);
+
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_write);
+
+/**
+ * regmap_raw_write(): Write raw values to one or more registers
+ *
+ * @map: Register map to write to
+ * @reg: Initial register to write to
+ * @val: Block of data to be written, laid out for direct transmission to the
+ * device
+ * @val_len: Length of data pointed to by val.
+ *
+ * This function is intended to be used for things like firmware
+ * download where a large block of data needs to be transferred to the
+ * device. No formatting will be done on the data provided.
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_raw_write(struct regmap *map, unsigned int reg,
+ const void *val, size_t val_len)
+{
+ int ret;
+
+ mutex_lock(&map->lock);
+
+ ret = _regmap_raw_write(map, reg, val, val_len);
+
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_raw_write);
+
+static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
+ unsigned int val_len)
+{
+ u8 *u8 = map->work_buf;
+ int ret;
+
+ map->format.format_reg(map->work_buf, reg);
+
+ /*
+ * Some buses flag reads by setting the high bits in the
+ * register addresss; since it's always the high bits for all
+ * current formats we can do this here rather than in
+ * formatting. This may break if we get interesting formats.
+ */
+ if (map->bus->read_flag_mask)
+ u8[0] |= map->bus->read_flag_mask;
+
+ ret = map->bus->read(map->dev, map->work_buf, map->format.reg_bytes,
+ val, map->format.val_bytes);
+ if (ret != 0)
+ return ret;
+
+ return 0;
+}
+
+static int _regmap_read(struct regmap *map, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+
+ if (!map->format.parse_val)
+ return -EINVAL;
+
+ ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes);
+ if (ret == 0)
+ *val = map->format.parse_val(map->work_buf);
+
+ return ret;
+}
+
+/**
+ * regmap_read(): Read a value from a single register
+ *
+ * @map: Register map to write to
+ * @reg: Register to be read from
+ * @val: Pointer to store read value
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
+{
+ int ret;
+
+ mutex_lock(&map->lock);
+
+ ret = _regmap_read(map, reg, val);
+
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_read);
+
+/**
+ * regmap_raw_read(): Read raw data from the device
+ *
+ * @map: Register map to write to
+ * @reg: First register to be read from
+ * @val: Pointer to store read value
+ * @val_len: Size of data to read
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
+ size_t val_len)
+{
+ int ret;
+
+ mutex_lock(&map->lock);
+
+ ret = _regmap_raw_read(map, reg, val, val_len);
+
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_raw_read);
+
+/**
+ * regmap_bulk_read(): Read multiple registers from the device
+ *
+ * @map: Register map to write to
+ * @reg: First register to be read from
+ * @val: Pointer to store read value, in native register size for device
+ * @val_count: Number of registers to read
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
+ size_t val_count)
+{
+ int ret, i;
+ size_t val_bytes = map->format.val_bytes;
+
+ if (!map->format.parse_val)
+ return -EINVAL;
+
+ ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
+ if (ret != 0)
+ return ret;
+
+ for (i = 0; i < val_count * val_bytes; i += val_bytes)
+ map->format.parse_val(val + i);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(regmap_bulk_read);
+
+/**
+ * remap_update_bits: Perform a read/modify/write cycle on the register map
+ *
+ * @map: Register map to update
+ * @reg: Register to update
+ * @mask: Bitmask to change
+ * @val: New value for bitmask
+ *
+ * Returns zero for success, a negative number on error.
+ */
+int regmap_update_bits(struct regmap *map, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+ unsigned int tmp;
+
+ mutex_lock(&map->lock);
+
+ ret = _regmap_read(map, reg, &tmp);
+ if (ret != 0)
+ goto out;
+
+ tmp &= ~mask;
+ tmp |= val & mask;
+
+ ret = _regmap_write(map, reg, tmp);
+
+out:
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits);
config REGULATOR_TPS65023
tristate "TI TPS65023 Power regulators"
depends on I2C
+ select REGMAP_I2C
help
This driver supports TPS65023 voltage regulator chips. TPS65023 provides
three step-down converters and two general-purpose LDO voltage regulators.
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
+#include <linux/regmap.h>
/* Register definitions */
#define TPS65023_REG_VERSION 0
struct i2c_client *client;
struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
const struct tps_info *info[TPS65023_NUM_REGULATOR];
- struct mutex io_lock;
+ struct regmap *regmap;
};
-static inline int tps_65023_read(struct tps_pmic *tps, u8 reg)
-{
- return i2c_smbus_read_byte_data(tps->client, reg);
-}
-
-static inline int tps_65023_write(struct tps_pmic *tps, u8 reg, u8 val)
-{
- return i2c_smbus_write_byte_data(tps->client, reg, val);
-}
-
static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
{
- int err, data;
-
- mutex_lock(&tps->io_lock);
-
- data = tps_65023_read(tps, reg);
- if (data < 0) {
- dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
- err = data;
- goto out;
- }
-
- data |= mask;
- err = tps_65023_write(tps, reg, data);
- if (err)
- dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
-
-out:
- mutex_unlock(&tps->io_lock);
- return err;
+ return regmap_update_bits(tps->regmap, reg, mask, mask);
}
static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
{
- int err, data;
-
- mutex_lock(&tps->io_lock);
-
- data = tps_65023_read(tps, reg);
- if (data < 0) {
- dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
- err = data;
- goto out;
- }
-
- data &= ~mask;
-
- err = tps_65023_write(tps, reg, data);
- if (err)
- dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
-
-out:
- mutex_unlock(&tps->io_lock);
- return err;
-
+ return regmap_update_bits(tps->regmap, reg, mask, 0);
}
static int tps_65023_reg_read(struct tps_pmic *tps, u8 reg)
{
- int data;
+ unsigned int val;
+ int ret;
- mutex_lock(&tps->io_lock);
+ ret = regmap_read(tps->regmap, reg, &val);
- data = tps_65023_read(tps, reg);
- if (data < 0)
- dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
-
- mutex_unlock(&tps->io_lock);
- return data;
+ if (ret != 0)
+ return ret;
+ else
+ return val;
}
static int tps_65023_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
{
- int err;
-
- mutex_lock(&tps->io_lock);
-
- err = tps_65023_write(tps, reg, val);
- if (err < 0)
- dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
-
- mutex_unlock(&tps->io_lock);
- return err;
+ return regmap_write(tps->regmap, reg, val);
}
static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
.list_voltage = tps65023_ldo_list_voltage,
};
+static struct regmap_config tps65023_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
static int __devinit tps_65023_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
if (!tps)
return -ENOMEM;
- mutex_init(&tps->io_lock);
+ tps->regmap = regmap_init_i2c(client, &tps65023_regmap_config);
+ if (IS_ERR(tps->regmap)) {
+ error = PTR_ERR(tps->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ error);
+ goto fail_alloc;
+ }
/* common for all regulators */
tps->client = client;
while (--i >= 0)
regulator_unregister(tps->rdev[i]);
+ regmap_exit(tps->regmap);
+ fail_alloc:
kfree(tps);
return error;
}
for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
regulator_unregister(tps->rdev[i]);
+ regmap_exit(tps->regmap);
kfree(tps);
return 0;
--- /dev/null
+#ifndef __LINUX_REGMAP_H
+#define __LINUX_REGMAP_H
+
+/*
+ * Register map access API
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+struct i2c_client;
+struct spi_device;
+
+struct regmap_config {
+ int reg_bits;
+ int val_bits;
+};
+
+typedef int (*regmap_hw_write)(struct device *dev, const void *data,
+ size_t count);
+typedef int (*regmap_hw_gather_write)(struct device *dev,
+ const void *reg, size_t reg_len,
+ const void *val, size_t val_len);
+typedef int (*regmap_hw_read)(struct device *dev,
+ const void *reg_buf, size_t reg_size,
+ void *val_buf, size_t val_size);
+
+/**
+ * Description of a hardware bus for the register map infrastructure.
+ *
+ * @list: Internal use.
+ * @type: Bus type, used to identify bus to be used for a device.
+ * @write: Write operation.
+ * @gather_write: Write operation with split register/value, return -ENOTSUPP
+ * if not implemented on a given device.
+ * @read: Read operation. Data is returned in the buffer used to transmit
+ * data.
+ * @owner: Module with the bus implementation, used to pin the implementation
+ * in memory.
+ * @read_flag_mask: Mask to be set in the top byte of the register when doing
+ * a read.
+ */
+struct regmap_bus {
+ struct list_head list;
+ struct bus_type *type;
+ regmap_hw_write write;
+ regmap_hw_gather_write gather_write;
+ regmap_hw_read read;
+ struct module *owner;
+ u8 read_flag_mask;
+};
+
+struct regmap *regmap_init(struct device *dev,
+ const struct regmap_bus *bus,
+ const struct regmap_config *config);
+struct regmap *regmap_init_i2c(struct i2c_client *i2c,
+ const struct regmap_config *config);
+struct regmap *regmap_init_spi(struct spi_device *dev,
+ const struct regmap_config *config);
+
+void regmap_exit(struct regmap *map);
+int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
+int regmap_raw_write(struct regmap *map, unsigned int reg,
+ const void *val, size_t val_len);
+int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
+int regmap_raw_read(struct regmap *map, unsigned int reg,
+ void *val, size_t val_len);
+int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
+ size_t val_count);
+int regmap_update_bits(struct regmap *map, unsigned int reg,
+ unsigned int mask, unsigned int val);
+
+#endif
git.openpandora.org / pandora-kernel.git / commitdiff