Commit | Line | Data |
---|---|---|
9a9a54ad AG |
1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | */ | |
5a418558 | 12 | #include <linux/of.h> |
9a9a54ad AG |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/rtc.h> | |
5d7dc4cf | 16 | #include <linux/platform_device.h> |
9a9a54ad | 17 | #include <linux/pm.h> |
5d7dc4cf | 18 | #include <linux/regmap.h> |
9a9a54ad AG |
19 | #include <linux/slab.h> |
20 | #include <linux/spinlock.h> | |
21 | ||
9a9a54ad AG |
22 | /* RTC Register offsets from RTC CTRL REG */ |
23 | #define PM8XXX_ALARM_CTRL_OFFSET 0x01 | |
24 | #define PM8XXX_RTC_WRITE_OFFSET 0x02 | |
25 | #define PM8XXX_RTC_READ_OFFSET 0x06 | |
26 | #define PM8XXX_ALARM_RW_OFFSET 0x0A | |
27 | ||
28 | /* RTC_CTRL register bit fields */ | |
29 | #define PM8xxx_RTC_ENABLE BIT(7) | |
9a9a54ad AG |
30 | #define PM8xxx_RTC_ALARM_CLEAR BIT(0) |
31 | ||
32 | #define NUM_8_BIT_RTC_REGS 0x4 | |
33 | ||
c8d523a4 SV |
34 | /** |
35 | * struct pm8xxx_rtc_regs - describe RTC registers per PMIC versions | |
36 | * @ctrl: base address of control register | |
37 | * @write: base address of write register | |
38 | * @read: base address of read register | |
39 | * @alarm_ctrl: base address of alarm control register | |
40 | * @alarm_ctrl2: base address of alarm control2 register | |
41 | * @alarm_rw: base address of alarm read-write register | |
42 | * @alarm_en: alarm enable mask | |
43 | */ | |
44 | struct pm8xxx_rtc_regs { | |
45 | unsigned int ctrl; | |
46 | unsigned int write; | |
47 | unsigned int read; | |
48 | unsigned int alarm_ctrl; | |
49 | unsigned int alarm_ctrl2; | |
50 | unsigned int alarm_rw; | |
51 | unsigned int alarm_en; | |
52 | }; | |
53 | ||
9a9a54ad AG |
54 | /** |
55 | * struct pm8xxx_rtc - rtc driver internal structure | |
56 | * @rtc: rtc device for this driver. | |
5d7dc4cf | 57 | * @regmap: regmap used to access RTC registers |
5a418558 | 58 | * @allow_set_time: indicates whether writing to the RTC is allowed |
9a9a54ad | 59 | * @rtc_alarm_irq: rtc alarm irq number. |
9a9a54ad AG |
60 | * @ctrl_reg: rtc control register. |
61 | * @rtc_dev: device structure. | |
62 | * @ctrl_reg_lock: spinlock protecting access to ctrl_reg. | |
63 | */ | |
64 | struct pm8xxx_rtc { | |
65 | struct rtc_device *rtc; | |
5d7dc4cf | 66 | struct regmap *regmap; |
5a418558 | 67 | bool allow_set_time; |
9a9a54ad | 68 | int rtc_alarm_irq; |
c8d523a4 | 69 | const struct pm8xxx_rtc_regs *regs; |
9a9a54ad AG |
70 | struct device *rtc_dev; |
71 | spinlock_t ctrl_reg_lock; | |
72 | }; | |
73 | ||
9a9a54ad AG |
74 | /* |
75 | * Steps to write the RTC registers. | |
76 | * 1. Disable alarm if enabled. | |
83220bf3 MA |
77 | * 2. Disable rtc if enabled. |
78 | * 3. Write 0x00 to LSB. | |
79 | * 4. Write Byte[1], Byte[2], Byte[3] then Byte[0]. | |
80 | * 5. Enable rtc if disabled in step 2. | |
81 | * 6. Enable alarm if disabled in step 1. | |
9a9a54ad AG |
82 | */ |
83 | static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) | |
84 | { | |
85 | int rc, i; | |
86 | unsigned long secs, irq_flags; | |
83220bf3 MA |
87 | u8 value[NUM_8_BIT_RTC_REGS], alarm_enabled = 0, rtc_disabled = 0; |
88 | unsigned int ctrl_reg, rtc_ctrl_reg; | |
9a9a54ad | 89 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
c8d523a4 | 90 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
9a9a54ad | 91 | |
5a418558 JC |
92 | if (!rtc_dd->allow_set_time) |
93 | return -EACCES; | |
94 | ||
9a9a54ad AG |
95 | rtc_tm_to_time(tm, &secs); |
96 | ||
83220bf3 MA |
97 | dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); |
98 | ||
9a9a54ad AG |
99 | for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { |
100 | value[i] = secs & 0xFF; | |
101 | secs >>= 8; | |
102 | } | |
103 | ||
9a9a54ad | 104 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); |
9a9a54ad | 105 | |
83220bf3 | 106 | rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); |
c8d523a4 SV |
107 | if (rc) |
108 | goto rtc_rw_fail; | |
109 | ||
110 | if (ctrl_reg & regs->alarm_en) { | |
9a9a54ad | 111 | alarm_enabled = 1; |
c8d523a4 | 112 | ctrl_reg &= ~regs->alarm_en; |
83220bf3 MA |
113 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); |
114 | if (rc) { | |
115 | dev_err(dev, "Write to RTC Alarm control register failed\n"); | |
116 | goto rtc_rw_fail; | |
117 | } | |
118 | } | |
119 | ||
120 | /* Disable RTC H/w before writing on RTC register */ | |
121 | rc = regmap_read(rtc_dd->regmap, regs->ctrl, &rtc_ctrl_reg); | |
122 | if (rc) | |
123 | goto rtc_rw_fail; | |
124 | ||
125 | if (rtc_ctrl_reg & PM8xxx_RTC_ENABLE) { | |
126 | rtc_disabled = 1; | |
127 | rtc_ctrl_reg &= ~PM8xxx_RTC_ENABLE; | |
128 | rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg); | |
5d7dc4cf | 129 | if (rc) { |
5bed811d | 130 | dev_err(dev, "Write to RTC control register failed\n"); |
9a9a54ad AG |
131 | goto rtc_rw_fail; |
132 | } | |
5bed811d | 133 | } |
9a9a54ad AG |
134 | |
135 | /* Write 0 to Byte[0] */ | |
c8d523a4 | 136 | rc = regmap_write(rtc_dd->regmap, regs->write, 0); |
5d7dc4cf | 137 | if (rc) { |
9a9a54ad AG |
138 | dev_err(dev, "Write to RTC write data register failed\n"); |
139 | goto rtc_rw_fail; | |
140 | } | |
141 | ||
142 | /* Write Byte[1], Byte[2], Byte[3] */ | |
c8d523a4 | 143 | rc = regmap_bulk_write(rtc_dd->regmap, regs->write + 1, |
5d7dc4cf JC |
144 | &value[1], sizeof(value) - 1); |
145 | if (rc) { | |
9a9a54ad AG |
146 | dev_err(dev, "Write to RTC write data register failed\n"); |
147 | goto rtc_rw_fail; | |
148 | } | |
149 | ||
150 | /* Write Byte[0] */ | |
c8d523a4 | 151 | rc = regmap_write(rtc_dd->regmap, regs->write, value[0]); |
5d7dc4cf | 152 | if (rc) { |
9a9a54ad AG |
153 | dev_err(dev, "Write to RTC write data register failed\n"); |
154 | goto rtc_rw_fail; | |
155 | } | |
156 | ||
83220bf3 MA |
157 | /* Enable RTC H/w after writing on RTC register */ |
158 | if (rtc_disabled) { | |
159 | rtc_ctrl_reg |= PM8xxx_RTC_ENABLE; | |
160 | rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg); | |
161 | if (rc) { | |
162 | dev_err(dev, "Write to RTC control register failed\n"); | |
163 | goto rtc_rw_fail; | |
164 | } | |
165 | } | |
166 | ||
9a9a54ad | 167 | if (alarm_enabled) { |
c8d523a4 | 168 | ctrl_reg |= regs->alarm_en; |
83220bf3 | 169 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); |
5d7dc4cf | 170 | if (rc) { |
83220bf3 | 171 | dev_err(dev, "Write to RTC Alarm control register failed\n"); |
9a9a54ad AG |
172 | goto rtc_rw_fail; |
173 | } | |
9a9a54ad AG |
174 | } |
175 | ||
176 | rtc_rw_fail: | |
c8d523a4 | 177 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
9a9a54ad AG |
178 | |
179 | return rc; | |
180 | } | |
181 | ||
182 | static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) | |
183 | { | |
184 | int rc; | |
5d7dc4cf | 185 | u8 value[NUM_8_BIT_RTC_REGS]; |
9a9a54ad | 186 | unsigned long secs; |
5d7dc4cf | 187 | unsigned int reg; |
9a9a54ad | 188 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
c8d523a4 | 189 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
9a9a54ad | 190 | |
c8d523a4 | 191 | rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, sizeof(value)); |
5d7dc4cf | 192 | if (rc) { |
9a9a54ad AG |
193 | dev_err(dev, "RTC read data register failed\n"); |
194 | return rc; | |
195 | } | |
196 | ||
197 | /* | |
198 | * Read the LSB again and check if there has been a carry over. | |
199 | * If there is, redo the read operation. | |
200 | */ | |
c8d523a4 | 201 | rc = regmap_read(rtc_dd->regmap, regs->read, ®); |
9a9a54ad AG |
202 | if (rc < 0) { |
203 | dev_err(dev, "RTC read data register failed\n"); | |
204 | return rc; | |
205 | } | |
206 | ||
207 | if (unlikely(reg < value[0])) { | |
c8d523a4 | 208 | rc = regmap_bulk_read(rtc_dd->regmap, regs->read, |
5d7dc4cf JC |
209 | value, sizeof(value)); |
210 | if (rc) { | |
9a9a54ad AG |
211 | dev_err(dev, "RTC read data register failed\n"); |
212 | return rc; | |
213 | } | |
214 | } | |
215 | ||
216 | secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); | |
217 | ||
218 | rtc_time_to_tm(secs, tm); | |
219 | ||
9a9a54ad | 220 | dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n", |
5bed811d JC |
221 | secs, tm->tm_hour, tm->tm_min, tm->tm_sec, |
222 | tm->tm_mday, tm->tm_mon, tm->tm_year); | |
9a9a54ad AG |
223 | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
228 | { | |
229 | int rc, i; | |
c8d523a4 SV |
230 | u8 value[NUM_8_BIT_RTC_REGS]; |
231 | unsigned int ctrl_reg; | |
9a9a54ad AG |
232 | unsigned long secs, irq_flags; |
233 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); | |
c8d523a4 | 234 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
9a9a54ad AG |
235 | |
236 | rtc_tm_to_time(&alarm->time, &secs); | |
237 | ||
238 | for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { | |
239 | value[i] = secs & 0xFF; | |
240 | secs >>= 8; | |
241 | } | |
242 | ||
243 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); | |
244 | ||
c8d523a4 | 245 | rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value, |
5d7dc4cf JC |
246 | sizeof(value)); |
247 | if (rc) { | |
9a9a54ad AG |
248 | dev_err(dev, "Write to RTC ALARM register failed\n"); |
249 | goto rtc_rw_fail; | |
250 | } | |
251 | ||
c8d523a4 SV |
252 | rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); |
253 | if (rc) | |
254 | goto rtc_rw_fail; | |
5bed811d JC |
255 | |
256 | if (alarm->enabled) | |
c8d523a4 | 257 | ctrl_reg |= regs->alarm_en; |
5bed811d | 258 | else |
c8d523a4 | 259 | ctrl_reg &= ~regs->alarm_en; |
9a9a54ad | 260 | |
c8d523a4 | 261 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); |
5d7dc4cf | 262 | if (rc) { |
c8d523a4 | 263 | dev_err(dev, "Write to RTC alarm control register failed\n"); |
9a9a54ad AG |
264 | goto rtc_rw_fail; |
265 | } | |
266 | ||
9a9a54ad | 267 | dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", |
5bed811d JC |
268 | alarm->time.tm_hour, alarm->time.tm_min, |
269 | alarm->time.tm_sec, alarm->time.tm_mday, | |
270 | alarm->time.tm_mon, alarm->time.tm_year); | |
9a9a54ad AG |
271 | rtc_rw_fail: |
272 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); | |
273 | return rc; | |
274 | } | |
275 | ||
276 | static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) | |
277 | { | |
278 | int rc; | |
279 | u8 value[NUM_8_BIT_RTC_REGS]; | |
280 | unsigned long secs; | |
281 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); | |
c8d523a4 | 282 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
9a9a54ad | 283 | |
c8d523a4 | 284 | rc = regmap_bulk_read(rtc_dd->regmap, regs->alarm_rw, value, |
5d7dc4cf JC |
285 | sizeof(value)); |
286 | if (rc) { | |
9a9a54ad AG |
287 | dev_err(dev, "RTC alarm time read failed\n"); |
288 | return rc; | |
289 | } | |
290 | ||
291 | secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); | |
292 | ||
293 | rtc_time_to_tm(secs, &alarm->time); | |
294 | ||
295 | rc = rtc_valid_tm(&alarm->time); | |
296 | if (rc < 0) { | |
297 | dev_err(dev, "Invalid alarm time read from RTC\n"); | |
298 | return rc; | |
299 | } | |
300 | ||
301 | dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", | |
5bed811d JC |
302 | alarm->time.tm_hour, alarm->time.tm_min, |
303 | alarm->time.tm_sec, alarm->time.tm_mday, | |
304 | alarm->time.tm_mon, alarm->time.tm_year); | |
9a9a54ad AG |
305 | |
306 | return 0; | |
307 | } | |
308 | ||
309 | static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) | |
310 | { | |
311 | int rc; | |
312 | unsigned long irq_flags; | |
313 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); | |
c8d523a4 SV |
314 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
315 | unsigned int ctrl_reg; | |
9a9a54ad AG |
316 | |
317 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); | |
5bed811d | 318 | |
c8d523a4 SV |
319 | rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); |
320 | if (rc) | |
321 | goto rtc_rw_fail; | |
5bed811d JC |
322 | |
323 | if (enable) | |
c8d523a4 | 324 | ctrl_reg |= regs->alarm_en; |
5bed811d | 325 | else |
c8d523a4 | 326 | ctrl_reg &= ~regs->alarm_en; |
9a9a54ad | 327 | |
c8d523a4 | 328 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); |
5d7dc4cf | 329 | if (rc) { |
9a9a54ad AG |
330 | dev_err(dev, "Write to RTC control register failed\n"); |
331 | goto rtc_rw_fail; | |
332 | } | |
333 | ||
9a9a54ad AG |
334 | rtc_rw_fail: |
335 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); | |
336 | return rc; | |
337 | } | |
338 | ||
5a418558 | 339 | static const struct rtc_class_ops pm8xxx_rtc_ops = { |
9a9a54ad | 340 | .read_time = pm8xxx_rtc_read_time, |
5a418558 | 341 | .set_time = pm8xxx_rtc_set_time, |
9a9a54ad AG |
342 | .set_alarm = pm8xxx_rtc_set_alarm, |
343 | .read_alarm = pm8xxx_rtc_read_alarm, | |
344 | .alarm_irq_enable = pm8xxx_rtc_alarm_irq_enable, | |
345 | }; | |
346 | ||
347 | static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) | |
348 | { | |
349 | struct pm8xxx_rtc *rtc_dd = dev_id; | |
c8d523a4 | 350 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; |
5d7dc4cf | 351 | unsigned int ctrl_reg; |
9a9a54ad AG |
352 | int rc; |
353 | unsigned long irq_flags; | |
354 | ||
355 | rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); | |
356 | ||
357 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); | |
358 | ||
359 | /* Clear the alarm enable bit */ | |
c8d523a4 SV |
360 | rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); |
361 | if (rc) { | |
362 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); | |
363 | goto rtc_alarm_handled; | |
364 | } | |
365 | ||
366 | ctrl_reg &= ~regs->alarm_en; | |
9a9a54ad | 367 | |
c8d523a4 | 368 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); |
5d7dc4cf | 369 | if (rc) { |
9a9a54ad | 370 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
5bed811d | 371 | dev_err(rtc_dd->rtc_dev, |
c8d523a4 | 372 | "Write to alarm control register failed\n"); |
9a9a54ad AG |
373 | goto rtc_alarm_handled; |
374 | } | |
375 | ||
9a9a54ad AG |
376 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
377 | ||
378 | /* Clear RTC alarm register */ | |
c8d523a4 | 379 | rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl2, &ctrl_reg); |
5d7dc4cf | 380 | if (rc) { |
5bed811d | 381 | dev_err(rtc_dd->rtc_dev, |
c8d523a4 | 382 | "RTC Alarm control2 register read failed\n"); |
9a9a54ad AG |
383 | goto rtc_alarm_handled; |
384 | } | |
385 | ||
c8d523a4 SV |
386 | ctrl_reg |= PM8xxx_RTC_ALARM_CLEAR; |
387 | rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl2, ctrl_reg); | |
5d7dc4cf | 388 | if (rc) |
5bed811d | 389 | dev_err(rtc_dd->rtc_dev, |
c8d523a4 | 390 | "Write to RTC Alarm control2 register failed\n"); |
9a9a54ad AG |
391 | |
392 | rtc_alarm_handled: | |
393 | return IRQ_HANDLED; | |
394 | } | |
395 | ||
c8d523a4 SV |
396 | static int pm8xxx_rtc_enable(struct pm8xxx_rtc *rtc_dd) |
397 | { | |
398 | const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; | |
399 | unsigned int ctrl_reg; | |
400 | int rc; | |
401 | ||
402 | /* Check if the RTC is on, else turn it on */ | |
403 | rc = regmap_read(rtc_dd->regmap, regs->ctrl, &ctrl_reg); | |
404 | if (rc) | |
405 | return rc; | |
406 | ||
407 | if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) { | |
408 | ctrl_reg |= PM8xxx_RTC_ENABLE; | |
409 | rc = regmap_write(rtc_dd->regmap, regs->ctrl, ctrl_reg); | |
410 | if (rc) | |
411 | return rc; | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | static const struct pm8xxx_rtc_regs pm8921_regs = { | |
418 | .ctrl = 0x11d, | |
419 | .write = 0x11f, | |
420 | .read = 0x123, | |
421 | .alarm_rw = 0x127, | |
422 | .alarm_ctrl = 0x11d, | |
423 | .alarm_ctrl2 = 0x11e, | |
424 | .alarm_en = BIT(1), | |
425 | }; | |
426 | ||
427 | static const struct pm8xxx_rtc_regs pm8058_regs = { | |
428 | .ctrl = 0x1e8, | |
429 | .write = 0x1ea, | |
430 | .read = 0x1ee, | |
431 | .alarm_rw = 0x1f2, | |
432 | .alarm_ctrl = 0x1e8, | |
433 | .alarm_ctrl2 = 0x1e9, | |
434 | .alarm_en = BIT(1), | |
435 | }; | |
436 | ||
437 | static const struct pm8xxx_rtc_regs pm8941_regs = { | |
438 | .ctrl = 0x6046, | |
439 | .write = 0x6040, | |
440 | .read = 0x6048, | |
441 | .alarm_rw = 0x6140, | |
442 | .alarm_ctrl = 0x6146, | |
443 | .alarm_ctrl2 = 0x6148, | |
444 | .alarm_en = BIT(7), | |
445 | }; | |
446 | ||
5a418558 JC |
447 | /* |
448 | * Hardcoded RTC bases until IORESOURCE_REG mapping is figured out | |
449 | */ | |
450 | static const struct of_device_id pm8xxx_id_table[] = { | |
c8d523a4 | 451 | { .compatible = "qcom,pm8921-rtc", .data = &pm8921_regs }, |
08655bca | 452 | { .compatible = "qcom,pm8018-rtc", .data = &pm8921_regs }, |
c8d523a4 SV |
453 | { .compatible = "qcom,pm8058-rtc", .data = &pm8058_regs }, |
454 | { .compatible = "qcom,pm8941-rtc", .data = &pm8941_regs }, | |
5a418558 JC |
455 | { }, |
456 | }; | |
457 | MODULE_DEVICE_TABLE(of, pm8xxx_id_table); | |
458 | ||
5a167f45 | 459 | static int pm8xxx_rtc_probe(struct platform_device *pdev) |
9a9a54ad AG |
460 | { |
461 | int rc; | |
9a9a54ad | 462 | struct pm8xxx_rtc *rtc_dd; |
5a418558 | 463 | const struct of_device_id *match; |
9a9a54ad | 464 | |
5a418558 JC |
465 | match = of_match_node(pm8xxx_id_table, pdev->dev.of_node); |
466 | if (!match) | |
467 | return -ENXIO; | |
9a9a54ad | 468 | |
c417299c | 469 | rtc_dd = devm_kzalloc(&pdev->dev, sizeof(*rtc_dd), GFP_KERNEL); |
49ae425b | 470 | if (rtc_dd == NULL) |
9a9a54ad | 471 | return -ENOMEM; |
9a9a54ad AG |
472 | |
473 | /* Initialise spinlock to protect RTC control register */ | |
474 | spin_lock_init(&rtc_dd->ctrl_reg_lock); | |
475 | ||
5d7dc4cf JC |
476 | rtc_dd->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
477 | if (!rtc_dd->regmap) { | |
478 | dev_err(&pdev->dev, "Parent regmap unavailable.\n"); | |
479 | return -ENXIO; | |
480 | } | |
481 | ||
9a9a54ad AG |
482 | rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0); |
483 | if (rtc_dd->rtc_alarm_irq < 0) { | |
484 | dev_err(&pdev->dev, "Alarm IRQ resource absent!\n"); | |
c417299c | 485 | return -ENXIO; |
9a9a54ad AG |
486 | } |
487 | ||
5a418558 JC |
488 | rtc_dd->allow_set_time = of_property_read_bool(pdev->dev.of_node, |
489 | "allow-set-time"); | |
9a9a54ad | 490 | |
c8d523a4 | 491 | rtc_dd->regs = match->data; |
9a9a54ad AG |
492 | rtc_dd->rtc_dev = &pdev->dev; |
493 | ||
c8d523a4 SV |
494 | rc = pm8xxx_rtc_enable(rtc_dd); |
495 | if (rc) | |
c417299c | 496 | return rc; |
9a9a54ad AG |
497 | |
498 | platform_set_drvdata(pdev, rtc_dd); | |
499 | ||
fda9909d JC |
500 | device_init_wakeup(&pdev->dev, 1); |
501 | ||
9a9a54ad | 502 | /* Register the RTC device */ |
c417299c | 503 | rtc_dd->rtc = devm_rtc_device_register(&pdev->dev, "pm8xxx_rtc", |
5bed811d | 504 | &pm8xxx_rtc_ops, THIS_MODULE); |
9a9a54ad AG |
505 | if (IS_ERR(rtc_dd->rtc)) { |
506 | dev_err(&pdev->dev, "%s: RTC registration failed (%ld)\n", | |
5bed811d | 507 | __func__, PTR_ERR(rtc_dd->rtc)); |
c417299c | 508 | return PTR_ERR(rtc_dd->rtc); |
9a9a54ad AG |
509 | } |
510 | ||
511 | /* Request the alarm IRQ */ | |
bffcbc08 JC |
512 | rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->rtc_alarm_irq, |
513 | pm8xxx_alarm_trigger, | |
514 | IRQF_TRIGGER_RISING, | |
515 | "pm8xxx_rtc_alarm", rtc_dd); | |
9a9a54ad AG |
516 | if (rc < 0) { |
517 | dev_err(&pdev->dev, "Request IRQ failed (%d)\n", rc); | |
c417299c | 518 | return rc; |
9a9a54ad AG |
519 | } |
520 | ||
9a9a54ad AG |
521 | dev_dbg(&pdev->dev, "Probe success !!\n"); |
522 | ||
523 | return 0; | |
9a9a54ad AG |
524 | } |
525 | ||
9a9a54ad AG |
526 | #ifdef CONFIG_PM_SLEEP |
527 | static int pm8xxx_rtc_resume(struct device *dev) | |
528 | { | |
529 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); | |
530 | ||
531 | if (device_may_wakeup(dev)) | |
532 | disable_irq_wake(rtc_dd->rtc_alarm_irq); | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static int pm8xxx_rtc_suspend(struct device *dev) | |
538 | { | |
539 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); | |
540 | ||
541 | if (device_may_wakeup(dev)) | |
542 | enable_irq_wake(rtc_dd->rtc_alarm_irq); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | #endif | |
547 | ||
5bed811d JC |
548 | static SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, |
549 | pm8xxx_rtc_suspend, | |
550 | pm8xxx_rtc_resume); | |
9a9a54ad AG |
551 | |
552 | static struct platform_driver pm8xxx_rtc_driver = { | |
553 | .probe = pm8xxx_rtc_probe, | |
9a9a54ad | 554 | .driver = { |
5a418558 | 555 | .name = "rtc-pm8xxx", |
5a418558 JC |
556 | .pm = &pm8xxx_rtc_pm_ops, |
557 | .of_match_table = pm8xxx_id_table, | |
9a9a54ad AG |
558 | }, |
559 | }; | |
560 | ||
0c4eae66 | 561 | module_platform_driver(pm8xxx_rtc_driver); |
9a9a54ad AG |
562 | |
563 | MODULE_ALIAS("platform:rtc-pm8xxx"); | |
564 | MODULE_DESCRIPTION("PMIC8xxx RTC driver"); | |
565 | MODULE_LICENSE("GPL v2"); | |
566 | MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>"); |