4 * Copyright (c) 2012 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/err.h>
18 #include <linux/slab.h>
19 #include <linux/i2c.h>
21 #include <linux/of_irq.h>
22 #include <linux/interrupt.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/mutex.h>
25 #include <linux/mfd/core.h>
26 #include <linux/mfd/samsung/core.h>
27 #include <linux/mfd/samsung/irq.h>
28 #include <linux/mfd/samsung/s2mpa01.h>
29 #include <linux/mfd/samsung/s2mps11.h>
30 #include <linux/mfd/samsung/s2mps14.h>
31 #include <linux/mfd/samsung/s5m8763.h>
32 #include <linux/mfd/samsung/s5m8767.h>
33 #include <linux/regmap.h>
35 static const struct mfd_cell s5m8751_devs[] = {
37 .name = "s5m8751-pmic",
39 .name = "s5m-charger",
41 .name = "s5m8751-codec",
45 static const struct mfd_cell s5m8763_devs[] = {
47 .name = "s5m8763-pmic",
51 .name = "s5m-charger",
55 static const struct mfd_cell s5m8767_devs[] = {
57 .name = "s5m8767-pmic",
61 .name = "s5m8767-clk",
62 .of_compatible = "samsung,s5m8767-clk",
66 static const struct mfd_cell s2mps11_devs[] = {
68 .name = "s2mps11-pmic",
70 .name = "s2mps11-clk",
71 .of_compatible = "samsung,s2mps11-clk",
75 static const struct mfd_cell s2mps14_devs[] = {
77 .name = "s2mps14-pmic",
79 .name = "s2mps14-rtc",
81 .name = "s2mps14-clk",
82 .of_compatible = "samsung,s2mps14-clk",
86 static const struct mfd_cell s2mpa01_devs[] = {
88 .name = "s2mpa01-pmic",
93 static const struct of_device_id sec_dt_match[] = {
94 { .compatible = "samsung,s5m8767-pmic",
95 .data = (void *)S5M8767X,
97 .compatible = "samsung,s2mps11-pmic",
98 .data = (void *)S2MPS11X,
100 .compatible = "samsung,s2mps14-pmic",
101 .data = (void *)S2MPS14X,
103 .compatible = "samsung,s2mpa01-pmic",
104 .data = (void *)S2MPA01,
111 static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
114 case S2MPA01_REG_INT1M:
115 case S2MPA01_REG_INT2M:
116 case S2MPA01_REG_INT3M:
123 static bool s2mps11_volatile(struct device *dev, unsigned int reg)
126 case S2MPS11_REG_INT1M:
127 case S2MPS11_REG_INT2M:
128 case S2MPS11_REG_INT3M:
135 static bool s5m8763_volatile(struct device *dev, unsigned int reg)
138 case S5M8763_REG_IRQM1:
139 case S5M8763_REG_IRQM2:
140 case S5M8763_REG_IRQM3:
141 case S5M8763_REG_IRQM4:
148 static const struct regmap_config sec_regmap_config = {
153 static const struct regmap_config s2mpa01_regmap_config = {
157 .max_register = S2MPA01_REG_LDO_OVCB4,
158 .volatile_reg = s2mpa01_volatile,
159 .cache_type = REGCACHE_FLAT,
162 static const struct regmap_config s2mps11_regmap_config = {
166 .max_register = S2MPS11_REG_L38CTRL,
167 .volatile_reg = s2mps11_volatile,
168 .cache_type = REGCACHE_FLAT,
171 static const struct regmap_config s2mps14_regmap_config = {
175 .max_register = S2MPS14_REG_LDODSCH3,
176 .volatile_reg = s2mps11_volatile,
177 .cache_type = REGCACHE_FLAT,
180 static const struct regmap_config s5m8763_regmap_config = {
184 .max_register = S5M8763_REG_LBCNFG2,
185 .volatile_reg = s5m8763_volatile,
186 .cache_type = REGCACHE_FLAT,
189 static const struct regmap_config s5m8767_regmap_config = {
193 .max_register = S5M8767_REG_LDO28CTRL,
194 .volatile_reg = s2mps11_volatile,
195 .cache_type = REGCACHE_FLAT,
200 * Only the common platform data elements for s5m8767 are parsed here from the
201 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
202 * others have to parse their own platform data elements from device tree.
204 * The s5m8767 platform data structure is instantiated here and the drivers for
205 * the sub-modules need not instantiate another instance while parsing their
208 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
211 struct sec_platform_data *pd;
213 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
215 dev_err(dev, "could not allocate memory for pdata\n");
216 return ERR_PTR(-ENOMEM);
220 * ToDo: the 'wakeup' member in the platform data is more of a linux
221 * specfic information. Hence, there is no binding for that yet and
228 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
235 static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
236 const struct i2c_device_id *id)
239 if (i2c->dev.of_node) {
240 const struct of_device_id *match;
241 match = of_match_node(sec_dt_match, i2c->dev.of_node);
242 return (unsigned long)match->data;
245 return id->driver_data;
248 static int sec_pmic_probe(struct i2c_client *i2c,
249 const struct i2c_device_id *id)
251 struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
252 const struct regmap_config *regmap;
253 struct sec_pmic_dev *sec_pmic;
254 unsigned long device_type;
257 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
259 if (sec_pmic == NULL)
262 i2c_set_clientdata(i2c, sec_pmic);
263 sec_pmic->dev = &i2c->dev;
265 sec_pmic->irq = i2c->irq;
266 device_type = sec_i2c_get_driver_data(i2c, id);
268 if (sec_pmic->dev->of_node) {
269 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
271 ret = PTR_ERR(pdata);
274 pdata->device_type = device_type;
277 sec_pmic->device_type = pdata->device_type;
278 sec_pmic->ono = pdata->ono;
279 sec_pmic->irq_base = pdata->irq_base;
280 sec_pmic->wakeup = pdata->wakeup;
281 sec_pmic->pdata = pdata;
284 switch (sec_pmic->device_type) {
286 regmap = &s2mpa01_regmap_config;
289 regmap = &s2mps11_regmap_config;
292 regmap = &s2mps14_regmap_config;
295 regmap = &s5m8763_regmap_config;
298 regmap = &s5m8767_regmap_config;
301 regmap = &sec_regmap_config;
305 sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
306 if (IS_ERR(sec_pmic->regmap_pmic)) {
307 ret = PTR_ERR(sec_pmic->regmap_pmic);
308 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
313 if (pdata && pdata->cfg_pmic_irq)
314 pdata->cfg_pmic_irq();
316 sec_irq_init(sec_pmic);
318 pm_runtime_set_active(sec_pmic->dev);
320 switch (sec_pmic->device_type) {
322 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
323 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
326 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
327 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
330 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
331 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
334 ret = mfd_add_devices(sec_pmic->dev, -1, s2mpa01_devs,
335 ARRAY_SIZE(s2mpa01_devs), NULL, 0, NULL);
338 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
339 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
342 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps14_devs,
343 ARRAY_SIZE(s2mps14_devs), NULL, 0, NULL);
346 /* If this happens the probe function is problem */
353 device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
358 sec_irq_exit(sec_pmic);
362 static int sec_pmic_remove(struct i2c_client *i2c)
364 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
366 mfd_remove_devices(sec_pmic->dev);
367 sec_irq_exit(sec_pmic);
371 #ifdef CONFIG_PM_SLEEP
372 static int sec_pmic_suspend(struct device *dev)
374 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
375 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
377 if (device_may_wakeup(dev))
378 enable_irq_wake(sec_pmic->irq);
380 * PMIC IRQ must be disabled during suspend for RTC alarm
382 * When device is woken up from suspend, an
383 * interrupt occurs before resuming I2C bus controller.
384 * The interrupt is handled by regmap_irq_thread which tries
385 * to read RTC registers. This read fails (I2C is still
386 * suspended) and RTC Alarm interrupt is disabled.
388 disable_irq(sec_pmic->irq);
393 static int sec_pmic_resume(struct device *dev)
395 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
396 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
398 if (device_may_wakeup(dev))
399 disable_irq_wake(sec_pmic->irq);
400 enable_irq(sec_pmic->irq);
404 #endif /* CONFIG_PM_SLEEP */
406 static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
408 static const struct i2c_device_id sec_pmic_id[] = {
412 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
414 static struct i2c_driver sec_pmic_driver = {
417 .owner = THIS_MODULE,
418 .pm = &sec_pmic_pm_ops,
419 .of_match_table = of_match_ptr(sec_dt_match),
421 .probe = sec_pmic_probe,
422 .remove = sec_pmic_remove,
423 .id_table = sec_pmic_id,
426 static int __init sec_pmic_init(void)
428 return i2c_add_driver(&sec_pmic_driver);
431 subsys_initcall(sec_pmic_init);
433 static void __exit sec_pmic_exit(void)
435 i2c_del_driver(&sec_pmic_driver);
437 module_exit(sec_pmic_exit);
439 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
440 MODULE_DESCRIPTION("Core support for the S5M MFD");
441 MODULE_LICENSE("GPL");