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/rtc.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",
65 static const struct mfd_cell s2mps11_devs
[] = {
67 .name
= "s2mps11-pmic",
69 .name
= "s2mps11-clk",
73 static const struct mfd_cell s2mps14_devs
[] = {
75 .name
= "s2mps14-pmic",
77 .name
= "s2mps14-rtc",
79 .name
= "s2mps14-clk",
84 static struct of_device_id sec_dt_match
[] = {
85 { .compatible
= "samsung,s5m8767-pmic",
86 .data
= (void *)S5M8767X
,
88 { .compatible
= "samsung,s2mps11-pmic",
89 .data
= (void *)S2MPS11X
,
91 { .compatible
= "samsung,s2mps14-pmic",
92 .data
= (void *)S2MPS14X
,
98 static bool s2mps11_volatile(struct device
*dev
, unsigned int reg
)
101 case S2MPS11_REG_INT1M
:
102 case S2MPS11_REG_INT2M
:
103 case S2MPS11_REG_INT3M
:
110 static bool s5m8763_volatile(struct device
*dev
, unsigned int reg
)
113 case S5M8763_REG_IRQM1
:
114 case S5M8763_REG_IRQM2
:
115 case S5M8763_REG_IRQM3
:
116 case S5M8763_REG_IRQM4
:
123 static const struct regmap_config sec_regmap_config
= {
128 static const struct regmap_config s2mps11_regmap_config
= {
132 .max_register
= S2MPS11_REG_L38CTRL
,
133 .volatile_reg
= s2mps11_volatile
,
134 .cache_type
= REGCACHE_FLAT
,
137 static const struct regmap_config s2mps14_regmap_config
= {
141 .max_register
= S2MPS14_REG_LDODSCH3
,
142 .volatile_reg
= s2mps11_volatile
,
143 .cache_type
= REGCACHE_FLAT
,
146 static const struct regmap_config s5m8763_regmap_config
= {
150 .max_register
= S5M8763_REG_LBCNFG2
,
151 .volatile_reg
= s5m8763_volatile
,
152 .cache_type
= REGCACHE_FLAT
,
155 static const struct regmap_config s5m8767_regmap_config
= {
159 .max_register
= S5M8767_REG_LDO28CTRL
,
160 .volatile_reg
= s2mps11_volatile
,
161 .cache_type
= REGCACHE_FLAT
,
164 static const struct regmap_config s5m_rtc_regmap_config
= {
168 .max_register
= SEC_RTC_REG_MAX
,
171 static const struct regmap_config s2mps14_rtc_regmap_config
= {
175 .max_register
= S2MPS_RTC_REG_MAX
,
180 * Only the common platform data elements for s5m8767 are parsed here from the
181 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
182 * others have to parse their own platform data elements from device tree.
184 * The s5m8767 platform data structure is instantiated here and the drivers for
185 * the sub-modules need not instantiate another instance while parsing their
188 static struct sec_platform_data
*sec_pmic_i2c_parse_dt_pdata(
191 struct sec_platform_data
*pd
;
193 pd
= devm_kzalloc(dev
, sizeof(*pd
), GFP_KERNEL
);
195 dev_err(dev
, "could not allocate memory for pdata\n");
196 return ERR_PTR(-ENOMEM
);
200 * ToDo: the 'wakeup' member in the platform data is more of a linux
201 * specfic information. Hence, there is no binding for that yet and
208 static struct sec_platform_data
*sec_pmic_i2c_parse_dt_pdata(
215 static inline int sec_i2c_get_driver_data(struct i2c_client
*i2c
,
216 const struct i2c_device_id
*id
)
219 if (i2c
->dev
.of_node
) {
220 const struct of_device_id
*match
;
221 match
= of_match_node(sec_dt_match
, i2c
->dev
.of_node
);
222 return (int)match
->data
;
225 return (int)id
->driver_data
;
228 static int sec_pmic_probe(struct i2c_client
*i2c
,
229 const struct i2c_device_id
*id
)
231 struct sec_platform_data
*pdata
= dev_get_platdata(&i2c
->dev
);
232 const struct regmap_config
*regmap
, *regmap_rtc
;
233 struct sec_pmic_dev
*sec_pmic
;
236 sec_pmic
= devm_kzalloc(&i2c
->dev
, sizeof(struct sec_pmic_dev
),
238 if (sec_pmic
== NULL
)
241 i2c_set_clientdata(i2c
, sec_pmic
);
242 sec_pmic
->dev
= &i2c
->dev
;
244 sec_pmic
->irq
= i2c
->irq
;
245 sec_pmic
->type
= sec_i2c_get_driver_data(i2c
, id
);
247 if (sec_pmic
->dev
->of_node
) {
248 pdata
= sec_pmic_i2c_parse_dt_pdata(sec_pmic
->dev
);
250 ret
= PTR_ERR(pdata
);
253 pdata
->device_type
= sec_pmic
->type
;
256 sec_pmic
->device_type
= pdata
->device_type
;
257 sec_pmic
->ono
= pdata
->ono
;
258 sec_pmic
->irq_base
= pdata
->irq_base
;
259 sec_pmic
->wakeup
= pdata
->wakeup
;
260 sec_pmic
->pdata
= pdata
;
263 switch (sec_pmic
->device_type
) {
265 regmap
= &s2mps11_regmap_config
;
267 * The rtc-s5m driver does not support S2MPS11 and there
268 * is no mfd_cell for S2MPS11 RTC device.
269 * However we must pass something to devm_regmap_init_i2c()
270 * so use S5M-like regmap config even though it wouldn't work.
272 regmap_rtc
= &s5m_rtc_regmap_config
;
275 regmap
= &s2mps14_regmap_config
;
276 regmap_rtc
= &s2mps14_rtc_regmap_config
;
279 regmap
= &s5m8763_regmap_config
;
280 regmap_rtc
= &s5m_rtc_regmap_config
;
283 regmap
= &s5m8767_regmap_config
;
284 regmap_rtc
= &s5m_rtc_regmap_config
;
287 regmap
= &sec_regmap_config
;
288 regmap_rtc
= &s5m_rtc_regmap_config
;
292 sec_pmic
->regmap_pmic
= devm_regmap_init_i2c(i2c
, regmap
);
293 if (IS_ERR(sec_pmic
->regmap_pmic
)) {
294 ret
= PTR_ERR(sec_pmic
->regmap_pmic
);
295 dev_err(&i2c
->dev
, "Failed to allocate register map: %d\n",
300 sec_pmic
->rtc
= i2c_new_dummy(i2c
->adapter
, RTC_I2C_ADDR
);
301 i2c_set_clientdata(sec_pmic
->rtc
, sec_pmic
);
303 sec_pmic
->regmap_rtc
= devm_regmap_init_i2c(sec_pmic
->rtc
, regmap_rtc
);
304 if (IS_ERR(sec_pmic
->regmap_rtc
)) {
305 ret
= PTR_ERR(sec_pmic
->regmap_rtc
);
306 dev_err(&i2c
->dev
, "Failed to allocate RTC register map: %d\n",
311 if (pdata
&& pdata
->cfg_pmic_irq
)
312 pdata
->cfg_pmic_irq();
314 sec_irq_init(sec_pmic
);
316 pm_runtime_set_active(sec_pmic
->dev
);
318 switch (sec_pmic
->device_type
) {
320 ret
= mfd_add_devices(sec_pmic
->dev
, -1, s5m8751_devs
,
321 ARRAY_SIZE(s5m8751_devs
), NULL
, 0, NULL
);
324 ret
= mfd_add_devices(sec_pmic
->dev
, -1, s5m8763_devs
,
325 ARRAY_SIZE(s5m8763_devs
), NULL
, 0, NULL
);
328 ret
= mfd_add_devices(sec_pmic
->dev
, -1, s5m8767_devs
,
329 ARRAY_SIZE(s5m8767_devs
), NULL
, 0, NULL
);
332 ret
= mfd_add_devices(sec_pmic
->dev
, -1, s2mps11_devs
,
333 ARRAY_SIZE(s2mps11_devs
), NULL
, 0, NULL
);
336 ret
= mfd_add_devices(sec_pmic
->dev
, -1, s2mps14_devs
,
337 ARRAY_SIZE(s2mps14_devs
), NULL
, 0, NULL
);
340 /* If this happens the probe function is problem */
347 device_init_wakeup(sec_pmic
->dev
, sec_pmic
->wakeup
);
352 sec_irq_exit(sec_pmic
);
353 i2c_unregister_device(sec_pmic
->rtc
);
357 static int sec_pmic_remove(struct i2c_client
*i2c
)
359 struct sec_pmic_dev
*sec_pmic
= i2c_get_clientdata(i2c
);
361 mfd_remove_devices(sec_pmic
->dev
);
362 sec_irq_exit(sec_pmic
);
363 i2c_unregister_device(sec_pmic
->rtc
);
367 #ifdef CONFIG_PM_SLEEP
368 static int sec_pmic_suspend(struct device
*dev
)
370 struct i2c_client
*i2c
= container_of(dev
, struct i2c_client
, dev
);
371 struct sec_pmic_dev
*sec_pmic
= i2c_get_clientdata(i2c
);
373 if (device_may_wakeup(dev
)) {
374 enable_irq_wake(sec_pmic
->irq
);
376 * PMIC IRQ must be disabled during suspend for RTC alarm
378 * When device is woken up from suspend by RTC Alarm, an
379 * interrupt occurs before resuming I2C bus controller.
380 * The interrupt is handled by regmap_irq_thread which tries
381 * to read RTC registers. This read fails (I2C is still
382 * suspended) and RTC Alarm interrupt is disabled.
384 disable_irq(sec_pmic
->irq
);
390 static int sec_pmic_resume(struct device
*dev
)
392 struct i2c_client
*i2c
= container_of(dev
, struct i2c_client
, dev
);
393 struct sec_pmic_dev
*sec_pmic
= i2c_get_clientdata(i2c
);
395 if (device_may_wakeup(dev
)) {
396 disable_irq_wake(sec_pmic
->irq
);
397 enable_irq(sec_pmic
->irq
);
402 #endif /* CONFIG_PM_SLEEP */
404 static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops
, sec_pmic_suspend
, sec_pmic_resume
);
406 static const struct i2c_device_id sec_pmic_id
[] = {
410 MODULE_DEVICE_TABLE(i2c
, sec_pmic_id
);
412 static struct i2c_driver sec_pmic_driver
= {
415 .owner
= THIS_MODULE
,
416 .pm
= &sec_pmic_pm_ops
,
417 .of_match_table
= of_match_ptr(sec_dt_match
),
419 .probe
= sec_pmic_probe
,
420 .remove
= sec_pmic_remove
,
421 .id_table
= sec_pmic_id
,
424 static int __init
sec_pmic_init(void)
426 return i2c_add_driver(&sec_pmic_driver
);
429 subsys_initcall(sec_pmic_init
);
431 static void __exit
sec_pmic_exit(void)
433 i2c_del_driver(&sec_pmic_driver
);
435 module_exit(sec_pmic_exit
);
437 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
438 MODULE_DESCRIPTION("Core support for the S5M MFD");
439 MODULE_LICENSE("GPL");