Commit | Line | Data |
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0f5f7078 | 1 | /* |
63063bfb | 2 | * sec-core.c |
0f5f7078 | 3 | * |
63063bfb | 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd |
0f5f7078 SK |
5 | * http://www.samsung.com |
6 | * | |
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. | |
11 | * | |
12 | */ | |
13 | ||
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> | |
1c5a099b | 20 | #include <linux/of.h> |
26aec009 | 21 | #include <linux/of_irq.h> |
0f5f7078 SK |
22 | #include <linux/interrupt.h> |
23 | #include <linux/pm_runtime.h> | |
24 | #include <linux/mutex.h> | |
25 | #include <linux/mfd/core.h> | |
54227bcf SK |
26 | #include <linux/mfd/samsung/core.h> |
27 | #include <linux/mfd/samsung/irq.h> | |
28 | #include <linux/mfd/samsung/rtc.h> | |
25f311fa MB |
29 | #include <linux/mfd/samsung/s2mps11.h> |
30 | #include <linux/mfd/samsung/s5m8763.h> | |
31 | #include <linux/mfd/samsung/s5m8767.h> | |
0f5f7078 SK |
32 | #include <linux/regmap.h> |
33 | ||
5ac98553 | 34 | static const struct mfd_cell s5m8751_devs[] = { |
88a1cfd6 SK |
35 | { |
36 | .name = "s5m8751-pmic", | |
37 | }, { | |
38 | .name = "s5m-charger", | |
39 | }, { | |
40 | .name = "s5m8751-codec", | |
41 | }, | |
42 | }; | |
43 | ||
5ac98553 | 44 | static const struct mfd_cell s5m8763_devs[] = { |
88a1cfd6 SK |
45 | { |
46 | .name = "s5m8763-pmic", | |
47 | }, { | |
48 | .name = "s5m-rtc", | |
49 | }, { | |
50 | .name = "s5m-charger", | |
51 | }, | |
52 | }; | |
53 | ||
5ac98553 | 54 | static const struct mfd_cell s5m8767_devs[] = { |
0f5f7078 SK |
55 | { |
56 | .name = "s5m8767-pmic", | |
57 | }, { | |
58 | .name = "s5m-rtc", | |
39fed00f TB |
59 | }, { |
60 | .name = "s5m8767-clk", | |
61 | } | |
0f5f7078 SK |
62 | }; |
63 | ||
5ac98553 | 64 | static const struct mfd_cell s2mps11_devs[] = { |
9b6d1343 SK |
65 | { |
66 | .name = "s2mps11-pmic", | |
3134bcae YSB |
67 | }, { |
68 | .name = "s2mps11-clk", | |
69 | } | |
9b6d1343 SK |
70 | }; |
71 | ||
26aec009 ADK |
72 | #ifdef CONFIG_OF |
73 | static struct of_device_id sec_dt_match[] = { | |
74 | { .compatible = "samsung,s5m8767-pmic", | |
75 | .data = (void *)S5M8767X, | |
76 | }, | |
aa32acad YSB |
77 | { .compatible = "samsung,s2mps11-pmic", |
78 | .data = (void *)S2MPS11X, | |
79 | }, | |
26aec009 ADK |
80 | {}, |
81 | }; | |
82 | #endif | |
83 | ||
6b845ba9 MB |
84 | static bool s2mps11_volatile(struct device *dev, unsigned int reg) |
85 | { | |
86 | switch (reg) { | |
87 | case S2MPS11_REG_INT1M: | |
88 | case S2MPS11_REG_INT2M: | |
89 | case S2MPS11_REG_INT3M: | |
90 | return false; | |
91 | default: | |
92 | return true; | |
93 | } | |
94 | } | |
95 | ||
96 | static bool s5m8763_volatile(struct device *dev, unsigned int reg) | |
97 | { | |
98 | switch (reg) { | |
99 | case S5M8763_REG_IRQM1: | |
100 | case S5M8763_REG_IRQM2: | |
101 | case S5M8763_REG_IRQM3: | |
102 | case S5M8763_REG_IRQM4: | |
103 | return false; | |
104 | default: | |
105 | return true; | |
106 | } | |
107 | } | |
108 | ||
a30fffb0 | 109 | static const struct regmap_config sec_regmap_config = { |
0f5f7078 SK |
110 | .reg_bits = 8, |
111 | .val_bits = 8, | |
112 | }; | |
113 | ||
a30fffb0 | 114 | static const struct regmap_config s2mps11_regmap_config = { |
25f311fa MB |
115 | .reg_bits = 8, |
116 | .val_bits = 8, | |
117 | ||
118 | .max_register = S2MPS11_REG_L38CTRL, | |
6b845ba9 MB |
119 | .volatile_reg = s2mps11_volatile, |
120 | .cache_type = REGCACHE_FLAT, | |
25f311fa MB |
121 | }; |
122 | ||
a30fffb0 | 123 | static const struct regmap_config s5m8763_regmap_config = { |
25f311fa MB |
124 | .reg_bits = 8, |
125 | .val_bits = 8, | |
126 | ||
127 | .max_register = S5M8763_REG_LBCNFG2, | |
6b845ba9 MB |
128 | .volatile_reg = s5m8763_volatile, |
129 | .cache_type = REGCACHE_FLAT, | |
25f311fa MB |
130 | }; |
131 | ||
a30fffb0 | 132 | static const struct regmap_config s5m8767_regmap_config = { |
25f311fa MB |
133 | .reg_bits = 8, |
134 | .val_bits = 8, | |
135 | ||
136 | .max_register = S5M8767_REG_LDO28CTRL, | |
6b845ba9 MB |
137 | .volatile_reg = s2mps11_volatile, |
138 | .cache_type = REGCACHE_FLAT, | |
25f311fa | 139 | }; |
26aec009 | 140 | |
3e1e4a5f KK |
141 | static const struct regmap_config sec_rtc_regmap_config = { |
142 | .reg_bits = 8, | |
143 | .val_bits = 8, | |
b07e2b70 KK |
144 | |
145 | .max_register = SEC_RTC_REG_MAX, | |
3e1e4a5f KK |
146 | }; |
147 | ||
26aec009 ADK |
148 | #ifdef CONFIG_OF |
149 | /* | |
150 | * Only the common platform data elements for s5m8767 are parsed here from the | |
151 | * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and | |
152 | * others have to parse their own platform data elements from device tree. | |
153 | * | |
154 | * The s5m8767 platform data structure is instantiated here and the drivers for | |
155 | * the sub-modules need not instantiate another instance while parsing their | |
156 | * platform data. | |
157 | */ | |
158 | static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( | |
159 | struct device *dev) | |
160 | { | |
161 | struct sec_platform_data *pd; | |
162 | ||
163 | pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); | |
164 | if (!pd) { | |
165 | dev_err(dev, "could not allocate memory for pdata\n"); | |
166 | return ERR_PTR(-ENOMEM); | |
167 | } | |
168 | ||
169 | /* | |
170 | * ToDo: the 'wakeup' member in the platform data is more of a linux | |
171 | * specfic information. Hence, there is no binding for that yet and | |
172 | * not parsed here. | |
173 | */ | |
174 | ||
175 | return pd; | |
176 | } | |
177 | #else | |
197bf856 | 178 | static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( |
26aec009 ADK |
179 | struct device *dev) |
180 | { | |
005718c0 | 181 | return NULL; |
26aec009 ADK |
182 | } |
183 | #endif | |
184 | ||
185 | static inline int sec_i2c_get_driver_data(struct i2c_client *i2c, | |
186 | const struct i2c_device_id *id) | |
187 | { | |
188 | #ifdef CONFIG_OF | |
189 | if (i2c->dev.of_node) { | |
190 | const struct of_device_id *match; | |
191 | match = of_match_node(sec_dt_match, i2c->dev.of_node); | |
192 | return (int)match->data; | |
193 | } | |
194 | #endif | |
195 | return (int)id->driver_data; | |
196 | } | |
197 | ||
63063bfb | 198 | static int sec_pmic_probe(struct i2c_client *i2c, |
0f5f7078 SK |
199 | const struct i2c_device_id *id) |
200 | { | |
334a41ce | 201 | struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev); |
3e5a45f7 | 202 | const struct regmap_config *regmap, *regmap_rtc; |
63063bfb | 203 | struct sec_pmic_dev *sec_pmic; |
61a2af30 | 204 | int ret; |
0f5f7078 | 205 | |
63063bfb | 206 | sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), |
621210e2 | 207 | GFP_KERNEL); |
63063bfb | 208 | if (sec_pmic == NULL) |
0f5f7078 SK |
209 | return -ENOMEM; |
210 | ||
63063bfb SK |
211 | i2c_set_clientdata(i2c, sec_pmic); |
212 | sec_pmic->dev = &i2c->dev; | |
213 | sec_pmic->i2c = i2c; | |
214 | sec_pmic->irq = i2c->irq; | |
26aec009 ADK |
215 | sec_pmic->type = sec_i2c_get_driver_data(i2c, id); |
216 | ||
217 | if (sec_pmic->dev->of_node) { | |
218 | pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); | |
219 | if (IS_ERR(pdata)) { | |
220 | ret = PTR_ERR(pdata); | |
221 | return ret; | |
222 | } | |
223 | pdata->device_type = sec_pmic->type; | |
224 | } | |
0f5f7078 | 225 | if (pdata) { |
63063bfb SK |
226 | sec_pmic->device_type = pdata->device_type; |
227 | sec_pmic->ono = pdata->ono; | |
228 | sec_pmic->irq_base = pdata->irq_base; | |
229 | sec_pmic->wakeup = pdata->wakeup; | |
26aec009 | 230 | sec_pmic->pdata = pdata; |
0f5f7078 SK |
231 | } |
232 | ||
25f311fa MB |
233 | switch (sec_pmic->device_type) { |
234 | case S2MPS11X: | |
235 | regmap = &s2mps11_regmap_config; | |
3e5a45f7 KK |
236 | /* |
237 | * The rtc-s5m driver does not support S2MPS11 and there | |
238 | * is no mfd_cell for S2MPS11 RTC device. | |
239 | * However we must pass something to devm_regmap_init_i2c() | |
240 | * so use S5M-like regmap config even though it wouldn't work. | |
241 | */ | |
242 | regmap_rtc = &sec_rtc_regmap_config; | |
25f311fa MB |
243 | break; |
244 | case S5M8763X: | |
245 | regmap = &s5m8763_regmap_config; | |
3e5a45f7 | 246 | regmap_rtc = &sec_rtc_regmap_config; |
25f311fa MB |
247 | break; |
248 | case S5M8767X: | |
249 | regmap = &s5m8767_regmap_config; | |
3e5a45f7 | 250 | regmap_rtc = &sec_rtc_regmap_config; |
25f311fa MB |
251 | break; |
252 | default: | |
253 | regmap = &sec_regmap_config; | |
3e5a45f7 | 254 | regmap_rtc = &sec_rtc_regmap_config; |
25f311fa MB |
255 | break; |
256 | } | |
257 | ||
3e1e4a5f KK |
258 | sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap); |
259 | if (IS_ERR(sec_pmic->regmap_pmic)) { | |
260 | ret = PTR_ERR(sec_pmic->regmap_pmic); | |
0f5f7078 | 261 | dev_err(&i2c->dev, "Failed to allocate register map: %d\n", |
61a2af30 | 262 | ret); |
1092e1c7 | 263 | return ret; |
0f5f7078 SK |
264 | } |
265 | ||
63063bfb SK |
266 | sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); |
267 | i2c_set_clientdata(sec_pmic->rtc, sec_pmic); | |
0f5f7078 | 268 | |
3e5a45f7 | 269 | sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc); |
3e1e4a5f KK |
270 | if (IS_ERR(sec_pmic->regmap_rtc)) { |
271 | ret = PTR_ERR(sec_pmic->regmap_rtc); | |
272 | dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n", | |
273 | ret); | |
274 | return ret; | |
275 | } | |
276 | ||
c3ebb30a | 277 | if (pdata && pdata->cfg_pmic_irq) |
0f5f7078 SK |
278 | pdata->cfg_pmic_irq(); |
279 | ||
63063bfb | 280 | sec_irq_init(sec_pmic); |
0f5f7078 | 281 | |
63063bfb | 282 | pm_runtime_set_active(sec_pmic->dev); |
0f5f7078 | 283 | |
63063bfb | 284 | switch (sec_pmic->device_type) { |
88a1cfd6 | 285 | case S5M8751X: |
63063bfb | 286 | ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, |
0848c94f | 287 | ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); |
88a1cfd6 SK |
288 | break; |
289 | case S5M8763X: | |
63063bfb | 290 | ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, |
0848c94f | 291 | ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); |
88a1cfd6 SK |
292 | break; |
293 | case S5M8767X: | |
63063bfb | 294 | ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, |
0848c94f | 295 | ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); |
88a1cfd6 | 296 | break; |
9b6d1343 SK |
297 | case S2MPS11X: |
298 | ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, | |
0848c94f | 299 | ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); |
9b6d1343 | 300 | break; |
88a1cfd6 SK |
301 | default: |
302 | /* If this happens the probe function is problem */ | |
303 | BUG(); | |
304 | } | |
0f5f7078 | 305 | |
15447a46 | 306 | if (ret) |
0f5f7078 SK |
307 | goto err; |
308 | ||
f6d6daaf KK |
309 | device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); |
310 | ||
0f5f7078 SK |
311 | return ret; |
312 | ||
313 | err: | |
63063bfb SK |
314 | sec_irq_exit(sec_pmic); |
315 | i2c_unregister_device(sec_pmic->rtc); | |
0f5f7078 SK |
316 | return ret; |
317 | } | |
318 | ||
63063bfb | 319 | static int sec_pmic_remove(struct i2c_client *i2c) |
0f5f7078 | 320 | { |
63063bfb | 321 | struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); |
0f5f7078 | 322 | |
63063bfb SK |
323 | mfd_remove_devices(sec_pmic->dev); |
324 | sec_irq_exit(sec_pmic); | |
325 | i2c_unregister_device(sec_pmic->rtc); | |
0f5f7078 SK |
326 | return 0; |
327 | } | |
328 | ||
8321bbf8 | 329 | #ifdef CONFIG_PM_SLEEP |
f6d6daaf KK |
330 | static int sec_pmic_suspend(struct device *dev) |
331 | { | |
332 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
333 | struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); | |
334 | ||
335 | if (device_may_wakeup(dev)) { | |
336 | enable_irq_wake(sec_pmic->irq); | |
337 | /* | |
338 | * PMIC IRQ must be disabled during suspend for RTC alarm | |
339 | * to work properly. | |
340 | * When device is woken up from suspend by RTC Alarm, an | |
341 | * interrupt occurs before resuming I2C bus controller. | |
342 | * The interrupt is handled by regmap_irq_thread which tries | |
343 | * to read RTC registers. This read fails (I2C is still | |
344 | * suspended) and RTC Alarm interrupt is disabled. | |
345 | */ | |
346 | disable_irq(sec_pmic->irq); | |
347 | } | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | static int sec_pmic_resume(struct device *dev) | |
353 | { | |
354 | struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); | |
355 | struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); | |
356 | ||
357 | if (device_may_wakeup(dev)) { | |
358 | disable_irq_wake(sec_pmic->irq); | |
359 | enable_irq(sec_pmic->irq); | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
8321bbf8 | 364 | #endif /* CONFIG_PM_SLEEP */ |
f6d6daaf KK |
365 | |
366 | static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume); | |
367 | ||
63063bfb SK |
368 | static const struct i2c_device_id sec_pmic_id[] = { |
369 | { "sec_pmic", 0 }, | |
0f5f7078 SK |
370 | { } |
371 | }; | |
63063bfb | 372 | MODULE_DEVICE_TABLE(i2c, sec_pmic_id); |
0f5f7078 | 373 | |
63063bfb | 374 | static struct i2c_driver sec_pmic_driver = { |
0f5f7078 | 375 | .driver = { |
63063bfb | 376 | .name = "sec_pmic", |
0f5f7078 | 377 | .owner = THIS_MODULE, |
f6d6daaf | 378 | .pm = &sec_pmic_pm_ops, |
26aec009 | 379 | .of_match_table = of_match_ptr(sec_dt_match), |
0f5f7078 | 380 | }, |
63063bfb SK |
381 | .probe = sec_pmic_probe, |
382 | .remove = sec_pmic_remove, | |
383 | .id_table = sec_pmic_id, | |
0f5f7078 SK |
384 | }; |
385 | ||
63063bfb | 386 | static int __init sec_pmic_init(void) |
0f5f7078 | 387 | { |
63063bfb | 388 | return i2c_add_driver(&sec_pmic_driver); |
0f5f7078 SK |
389 | } |
390 | ||
63063bfb | 391 | subsys_initcall(sec_pmic_init); |
0f5f7078 | 392 | |
63063bfb | 393 | static void __exit sec_pmic_exit(void) |
0f5f7078 | 394 | { |
63063bfb | 395 | i2c_del_driver(&sec_pmic_driver); |
0f5f7078 | 396 | } |
63063bfb | 397 | module_exit(sec_pmic_exit); |
0f5f7078 SK |
398 | |
399 | MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); | |
400 | MODULE_DESCRIPTION("Core support for the S5M MFD"); | |
401 | MODULE_LICENSE("GPL"); |