4 * Copyright 2011-2012 Texas Instruments Inc.
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/i2c.h>
20 #include <linux/interrupt.h>
21 #include <linux/irq.h>
22 #include <linux/regmap.h>
23 #include <linux/err.h>
24 #include <linux/mfd/core.h>
25 #include <linux/mfd/palmas.h>
26 #include <linux/of_device.h>
28 static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
32 .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
33 PALMAS_PRIMARY_SECONDARY_PAD3),
38 .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,
39 PALMAS_GPADC_SMPS_VSEL_MONITORING),
44 .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,
49 static const struct regmap_irq palmas_irqs[] = {
51 [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {
52 .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,
54 [PALMAS_PWRON_IRQ] = {
55 .mask = PALMAS_INT1_STATUS_PWRON,
57 [PALMAS_LONG_PRESS_KEY_IRQ] = {
58 .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,
60 [PALMAS_RPWRON_IRQ] = {
61 .mask = PALMAS_INT1_STATUS_RPWRON,
63 [PALMAS_PWRDOWN_IRQ] = {
64 .mask = PALMAS_INT1_STATUS_PWRDOWN,
66 [PALMAS_HOTDIE_IRQ] = {
67 .mask = PALMAS_INT1_STATUS_HOTDIE,
69 [PALMAS_VSYS_MON_IRQ] = {
70 .mask = PALMAS_INT1_STATUS_VSYS_MON,
72 [PALMAS_VBAT_MON_IRQ] = {
73 .mask = PALMAS_INT1_STATUS_VBAT_MON,
76 [PALMAS_RTC_ALARM_IRQ] = {
77 .mask = PALMAS_INT2_STATUS_RTC_ALARM,
80 [PALMAS_RTC_TIMER_IRQ] = {
81 .mask = PALMAS_INT2_STATUS_RTC_TIMER,
85 .mask = PALMAS_INT2_STATUS_WDT,
88 [PALMAS_BATREMOVAL_IRQ] = {
89 .mask = PALMAS_INT2_STATUS_BATREMOVAL,
92 [PALMAS_RESET_IN_IRQ] = {
93 .mask = PALMAS_INT2_STATUS_RESET_IN,
96 [PALMAS_FBI_BB_IRQ] = {
97 .mask = PALMAS_INT2_STATUS_FBI_BB,
100 [PALMAS_SHORT_IRQ] = {
101 .mask = PALMAS_INT2_STATUS_SHORT,
104 [PALMAS_VAC_ACOK_IRQ] = {
105 .mask = PALMAS_INT2_STATUS_VAC_ACOK,
109 [PALMAS_GPADC_AUTO_0_IRQ] = {
110 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,
113 [PALMAS_GPADC_AUTO_1_IRQ] = {
114 .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,
117 [PALMAS_GPADC_EOC_SW_IRQ] = {
118 .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,
121 [PALMAS_GPADC_EOC_RT_IRQ] = {
122 .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,
125 [PALMAS_ID_OTG_IRQ] = {
126 .mask = PALMAS_INT3_STATUS_ID_OTG,
130 .mask = PALMAS_INT3_STATUS_ID,
133 [PALMAS_VBUS_OTG_IRQ] = {
134 .mask = PALMAS_INT3_STATUS_VBUS_OTG,
137 [PALMAS_VBUS_IRQ] = {
138 .mask = PALMAS_INT3_STATUS_VBUS,
142 [PALMAS_GPIO_0_IRQ] = {
143 .mask = PALMAS_INT4_STATUS_GPIO_0,
146 [PALMAS_GPIO_1_IRQ] = {
147 .mask = PALMAS_INT4_STATUS_GPIO_1,
150 [PALMAS_GPIO_2_IRQ] = {
151 .mask = PALMAS_INT4_STATUS_GPIO_2,
154 [PALMAS_GPIO_3_IRQ] = {
155 .mask = PALMAS_INT4_STATUS_GPIO_3,
158 [PALMAS_GPIO_4_IRQ] = {
159 .mask = PALMAS_INT4_STATUS_GPIO_4,
162 [PALMAS_GPIO_5_IRQ] = {
163 .mask = PALMAS_INT4_STATUS_GPIO_5,
166 [PALMAS_GPIO_6_IRQ] = {
167 .mask = PALMAS_INT4_STATUS_GPIO_6,
170 [PALMAS_GPIO_7_IRQ] = {
171 .mask = PALMAS_INT4_STATUS_GPIO_7,
176 static struct regmap_irq_chip palmas_irq_chip = {
179 .num_irqs = ARRAY_SIZE(palmas_irqs),
183 .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
185 .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,
189 static int palmas_set_pdata_irq_flag(struct i2c_client *i2c,
190 struct palmas_platform_data *pdata)
192 struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
194 dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
198 pdata->irq_flags = irqd_get_trigger_type(irq_data);
199 dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
203 static void palmas_dt_to_pdata(struct i2c_client *i2c,
204 struct palmas_platform_data *pdata)
206 struct device_node *node = i2c->dev.of_node;
210 ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
212 pdata->mux_from_pdata = 1;
216 ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
218 pdata->mux_from_pdata = 1;
222 /* The default for this register is all masked */
223 ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
225 pdata->power_ctrl = prop;
227 pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
228 PALMAS_POWER_CTRL_ENABLE1_MASK |
229 PALMAS_POWER_CTRL_ENABLE2_MASK;
231 palmas_set_pdata_irq_flag(i2c, pdata);
234 static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
236 static const struct of_device_id of_palmas_match_tbl[] = {
238 .compatible = "ti,palmas",
239 .data = &palmas_features,
244 static int palmas_i2c_probe(struct i2c_client *i2c,
245 const struct i2c_device_id *id)
247 struct palmas *palmas;
248 struct palmas_platform_data *pdata;
249 struct device_node *node = i2c->dev.of_node;
251 unsigned int reg, addr, *features;
253 const struct of_device_id *match;
255 pdata = dev_get_platdata(&i2c->dev);
257 if (node && !pdata) {
258 pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
263 palmas_dt_to_pdata(i2c, pdata);
269 palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);
273 i2c_set_clientdata(i2c, palmas);
274 palmas->dev = &i2c->dev;
275 palmas->irq = i2c->irq;
277 match = of_match_device(of_match_ptr(of_palmas_match_tbl), &i2c->dev);
282 features = (unsigned int *)match->data;
283 palmas->features = *features;
285 for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {
287 palmas->i2c_clients[i] = i2c;
289 palmas->i2c_clients[i] =
290 i2c_new_dummy(i2c->adapter,
292 if (!palmas->i2c_clients[i]) {
294 "can't attach client %d\n", i);
298 palmas->i2c_clients[i]->dev.of_node = of_node_get(node);
300 palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],
301 &palmas_regmap_config[i]);
302 if (IS_ERR(palmas->regmap[i])) {
303 ret = PTR_ERR(palmas->regmap[i]);
305 "Failed to allocate regmap %d, err: %d\n",
312 dev_warn(palmas->dev, "IRQ missing: skipping irq request\n");
316 /* Change interrupt line output polarity */
317 if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
318 reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
321 ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
322 PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY,
325 dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret);
329 /* Change IRQ into clear on read mode for efficiency */
330 slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
331 addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
332 reg = PALMAS_INT_CTRL_INT_CLEAR;
334 regmap_write(palmas->regmap[slave], addr, reg);
336 ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
337 IRQF_ONESHOT | pdata->irq_flags, 0, &palmas_irq_chip,
343 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
344 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
345 PALMAS_PRIMARY_SECONDARY_PAD1);
347 if (pdata->mux_from_pdata) {
349 ret = regmap_write(palmas->regmap[slave], addr, reg);
353 ret = regmap_read(palmas->regmap[slave], addr, ®);
358 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))
359 palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;
360 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))
361 palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;
362 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
363 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
364 palmas->led_muxed |= PALMAS_LED1_MUXED;
365 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==
366 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))
367 palmas->pwm_muxed |= PALMAS_PWM1_MUXED;
368 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))
369 palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;
370 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
371 (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
372 palmas->led_muxed |= PALMAS_LED2_MUXED;
373 else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==
374 (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))
375 palmas->pwm_muxed |= PALMAS_PWM2_MUXED;
376 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))
377 palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;
379 addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
380 PALMAS_PRIMARY_SECONDARY_PAD2);
382 if (pdata->mux_from_pdata) {
384 ret = regmap_write(palmas->regmap[slave], addr, reg);
388 ret = regmap_read(palmas->regmap[slave], addr, ®);
393 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))
394 palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;
395 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))
396 palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;
397 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))
398 palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;
399 if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))
400 palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;
402 dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",
403 palmas->gpio_muxed, palmas->pwm_muxed,
406 reg = pdata->power_ctrl;
408 slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
409 addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);
411 ret = regmap_write(palmas->regmap[slave], addr, reg);
416 * If we are probing with DT do this the DT way and return here
417 * otherwise continue and add devices using mfd helpers.
420 ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
430 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
435 static int palmas_i2c_remove(struct i2c_client *i2c)
437 struct palmas *palmas = i2c_get_clientdata(i2c);
439 mfd_remove_devices(palmas->dev);
440 regmap_del_irq_chip(palmas->irq, palmas->irq_data);
445 static const struct i2c_device_id palmas_i2c_id[] = {
452 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);
454 static struct i2c_driver palmas_i2c_driver = {
457 .of_match_table = of_palmas_match_tbl,
458 .owner = THIS_MODULE,
460 .probe = palmas_i2c_probe,
461 .remove = palmas_i2c_remove,
462 .id_table = palmas_i2c_id,
465 static int __init palmas_i2c_init(void)
467 return i2c_add_driver(&palmas_i2c_driver);
469 /* init early so consumer devices can complete system boot */
470 subsys_initcall(palmas_i2c_init);
472 static void __exit palmas_i2c_exit(void)
474 i2c_del_driver(&palmas_i2c_driver);
476 module_exit(palmas_i2c_exit);
478 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
479 MODULE_DESCRIPTION("Palmas chip family multi-function driver");
480 MODULE_LICENSE("GPL");