blob: 59860128a221672a2c8c278af8ebdd57a523a2d5 [file] [log] [blame]
Sangbeom Kim5bccae62013-11-12 15:11:04 -08001/*
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -07002 * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd
Sangbeom Kim5bccae62013-11-12 15:11:04 -08003 * http://www.samsung.com
4 *
5 * Copyright (C) 2013 Google, Inc
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/module.h>
19#include <linux/i2c.h>
20#include <linux/slab.h>
21#include <linux/bcd.h>
22#include <linux/bitops.h>
23#include <linux/regmap.h>
24#include <linux/rtc.h>
25#include <linux/delay.h>
26#include <linux/platform_device.h>
27#include <linux/mfd/samsung/core.h>
28#include <linux/mfd/samsung/irq.h>
29#include <linux/mfd/samsung/rtc.h>
30
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080031/*
32 * Maximum number of retries for checking changes in UDR field
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -070033 * of S5M_RTC_UDR_CON register (to limit possible endless loop).
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080034 *
35 * After writing to RTC registers (setting time or alarm) read the UDR field
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -070036 * in S5M_RTC_UDR_CON register. UDR is auto-cleared when data have
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -080037 * been transferred.
38 */
39#define UDR_READ_RETRY_CNT 5
40
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070041/* Registers used by the driver which are different between chipsets. */
42struct s5m_rtc_reg_config {
43 /* Number of registers used for setting time/alarm0/alarm1 */
44 unsigned int regs_count;
45 /* First register for time, seconds */
46 unsigned int time;
47 /* RTC control register */
48 unsigned int ctrl;
49 /* First register for alarm 0, seconds */
50 unsigned int alarm0;
51 /* First register for alarm 1, seconds */
52 unsigned int alarm1;
53 /* SMPL/WTSR register */
54 unsigned int smpl_wtsr;
55 /*
56 * Register for update flag (UDR). Typically setting UDR field to 1
57 * will enable update of time or alarm register. Then it will be
58 * auto-cleared after successful update.
59 */
60 unsigned int rtc_udr_update;
61 /* Mask for UDR field in 'rtc_udr_update' register */
62 unsigned int rtc_udr_mask;
63};
64
65/* Register map for S5M8763 and S5M8767 */
66static const struct s5m_rtc_reg_config s5m_rtc_regs = {
67 .regs_count = 8,
68 .time = S5M_RTC_SEC,
69 .ctrl = S5M_ALARM1_CONF,
70 .alarm0 = S5M_ALARM0_SEC,
71 .alarm1 = S5M_ALARM1_SEC,
72 .smpl_wtsr = S5M_WTSR_SMPL_CNTL,
73 .rtc_udr_update = S5M_RTC_UDR_CON,
74 .rtc_udr_mask = S5M_RTC_UDR_MASK,
75};
76
Sangbeom Kim5bccae62013-11-12 15:11:04 -080077struct s5m_rtc_info {
78 struct device *dev;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +020079 struct i2c_client *i2c;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080080 struct sec_pmic_dev *s5m87xx;
Geert Uytterhoeven5ccb7d72013-12-12 17:12:25 -080081 struct regmap *regmap;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080082 struct rtc_device *rtc_dev;
83 int irq;
84 int device_type;
85 int rtc_24hr_mode;
86 bool wtsr_smpl;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -070087 const struct s5m_rtc_reg_config *regs;
Sangbeom Kim5bccae62013-11-12 15:11:04 -080088};
89
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +020090static const struct regmap_config s5m_rtc_regmap_config = {
91 .reg_bits = 8,
92 .val_bits = 8,
93
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -070094 .max_register = S5M_RTC_REG_MAX,
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +020095};
96
97static const struct regmap_config s2mps14_rtc_regmap_config = {
98 .reg_bits = 8,
99 .val_bits = 8,
100
101 .max_register = S2MPS_RTC_REG_MAX,
102};
103
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800104static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
105 int rtc_24hr_mode)
106{
107 tm->tm_sec = data[RTC_SEC] & 0x7f;
108 tm->tm_min = data[RTC_MIN] & 0x7f;
109 if (rtc_24hr_mode) {
110 tm->tm_hour = data[RTC_HOUR] & 0x1f;
111 } else {
112 tm->tm_hour = data[RTC_HOUR] & 0x0f;
113 if (data[RTC_HOUR] & HOUR_PM_MASK)
114 tm->tm_hour += 12;
115 }
116
117 tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
118 tm->tm_mday = data[RTC_DATE] & 0x1f;
119 tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
120 tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
121 tm->tm_yday = 0;
122 tm->tm_isdst = 0;
123}
124
125static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
126{
127 data[RTC_SEC] = tm->tm_sec;
128 data[RTC_MIN] = tm->tm_min;
129
130 if (tm->tm_hour >= 12)
131 data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
132 else
133 data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
134
135 data[RTC_WEEKDAY] = 1 << tm->tm_wday;
136 data[RTC_DATE] = tm->tm_mday;
137 data[RTC_MONTH] = tm->tm_mon + 1;
138 data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
139
140 if (tm->tm_year < 100) {
141 pr_err("s5m8767 RTC cannot handle the year %d.\n",
142 1900 + tm->tm_year);
143 return -EINVAL;
144 } else {
145 return 0;
146 }
147}
148
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800149/*
150 * Read RTC_UDR_CON register and wait till UDR field is cleared.
151 * This indicates that time/alarm update ended.
152 */
153static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
154{
155 int ret, retry = UDR_READ_RETRY_CNT;
156 unsigned int data;
157
158 do {
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700159 ret = regmap_read(info->regmap, info->regs->rtc_udr_update,
160 &data);
161 } while (--retry && (data & info->regs->rtc_udr_mask) && !ret);
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800162
163 if (!retry)
164 dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
165
166 return ret;
167}
168
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700169static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info,
170 struct rtc_wkalrm *alarm)
171{
172 int ret;
173 unsigned int val;
174
175 switch (info->device_type) {
176 case S5M8767X:
177 case S5M8763X:
178 ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val);
179 val &= S5M_ALARM0_STATUS;
180 break;
181 default:
182 return -EINVAL;
183 }
184 if (ret < 0)
185 return ret;
186
187 if (val)
188 alarm->pending = 1;
189 else
190 alarm->pending = 0;
191
192 return 0;
193}
194
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800195static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
196{
197 int ret;
198 unsigned int data;
199
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700200 ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800201 if (ret < 0) {
202 dev_err(info->dev, "failed to read update reg(%d)\n", ret);
203 return ret;
204 }
205
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700206 data |= S5M_RTC_TIME_EN_MASK;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700207 data |= info->regs->rtc_udr_mask;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800208
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700209 ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800210 if (ret < 0) {
211 dev_err(info->dev, "failed to write update reg(%d)\n", ret);
212 return ret;
213 }
214
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800215 ret = s5m8767_wait_for_udr_update(info);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800216
217 return ret;
218}
219
220static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
221{
222 int ret;
223 unsigned int data;
224
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700225 ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800226 if (ret < 0) {
227 dev_err(info->dev, "%s: fail to read update reg(%d)\n",
228 __func__, ret);
229 return ret;
230 }
231
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700232 data &= ~S5M_RTC_TIME_EN_MASK;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700233 data |= info->regs->rtc_udr_mask;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800234
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700235 ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800236 if (ret < 0) {
237 dev_err(info->dev, "%s: fail to write update reg(%d)\n",
238 __func__, ret);
239 return ret;
240 }
241
Krzysztof Kozlowskid73238d2013-12-12 17:12:28 -0800242 ret = s5m8767_wait_for_udr_update(info);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800243
244 return ret;
245}
246
247static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
248{
249 tm->tm_sec = bcd2bin(data[RTC_SEC]);
250 tm->tm_min = bcd2bin(data[RTC_MIN]);
251
252 if (data[RTC_HOUR] & HOUR_12) {
253 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
254 if (data[RTC_HOUR] & HOUR_PM)
255 tm->tm_hour += 12;
256 } else {
257 tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
258 }
259
260 tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
261 tm->tm_mday = bcd2bin(data[RTC_DATE]);
262 tm->tm_mon = bcd2bin(data[RTC_MONTH]);
263 tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
264 tm->tm_year -= 1900;
265}
266
267static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
268{
269 data[RTC_SEC] = bin2bcd(tm->tm_sec);
270 data[RTC_MIN] = bin2bcd(tm->tm_min);
271 data[RTC_HOUR] = bin2bcd(tm->tm_hour);
272 data[RTC_WEEKDAY] = tm->tm_wday;
273 data[RTC_DATE] = bin2bcd(tm->tm_mday);
274 data[RTC_MONTH] = bin2bcd(tm->tm_mon);
275 data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
276 data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
277}
278
279static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
280{
281 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700282 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800283 int ret;
284
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700285 ret = regmap_bulk_read(info->regmap, info->regs->time, data,
286 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800287 if (ret < 0)
288 return ret;
289
290 switch (info->device_type) {
291 case S5M8763X:
292 s5m8763_data_to_tm(data, tm);
293 break;
294
295 case S5M8767X:
296 s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
297 break;
298
299 default:
300 return -EINVAL;
301 }
302
303 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
304 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
305 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
306
307 return rtc_valid_tm(tm);
308}
309
310static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
311{
312 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700313 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800314 int ret = 0;
315
316 switch (info->device_type) {
317 case S5M8763X:
318 s5m8763_tm_to_data(tm, data);
319 break;
320 case S5M8767X:
321 ret = s5m8767_tm_to_data(tm, data);
322 break;
323 default:
324 return -EINVAL;
325 }
326
327 if (ret < 0)
328 return ret;
329
330 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
331 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
332 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
333
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700334 ret = regmap_raw_write(info->regmap, info->regs->time, data,
335 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800336 if (ret < 0)
337 return ret;
338
339 ret = s5m8767_rtc_set_time_reg(info);
340
341 return ret;
342}
343
344static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
345{
346 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700347 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800348 unsigned int val;
349 int ret, i;
350
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700351 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
352 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800353 if (ret < 0)
354 return ret;
355
356 switch (info->device_type) {
357 case S5M8763X:
358 s5m8763_data_to_tm(data, &alrm->time);
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700359 ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800360 if (ret < 0)
361 return ret;
362
363 alrm->enabled = !!val;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800364 break;
365
366 case S5M8767X:
367 s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800368 alrm->enabled = 0;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700369 for (i = 0; i < info->regs->regs_count; i++) {
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800370 if (data[i] & ALARM_ENABLE_MASK) {
371 alrm->enabled = 1;
372 break;
373 }
374 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800375 break;
376
377 default:
378 return -EINVAL;
379 }
380
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700381 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
382 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
383 alrm->time.tm_mday, alrm->time.tm_hour,
384 alrm->time.tm_min, alrm->time.tm_sec,
385 alrm->time.tm_wday);
386
387 ret = s5m_check_peding_alarm_interrupt(info, alrm);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800388
389 return 0;
390}
391
392static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
393{
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700394 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800395 int ret, i;
396 struct rtc_time tm;
397
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700398 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
399 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800400 if (ret < 0)
401 return ret;
402
403 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
404 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
405 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
406 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
407
408 switch (info->device_type) {
409 case S5M8763X:
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700410 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800411 break;
412
413 case S5M8767X:
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700414 for (i = 0; i < info->regs->regs_count; i++)
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800415 data[i] &= ~ALARM_ENABLE_MASK;
416
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700417 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
418 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800419 if (ret < 0)
420 return ret;
421
422 ret = s5m8767_rtc_set_alarm_reg(info);
423
424 break;
425
426 default:
427 return -EINVAL;
428 }
429
430 return ret;
431}
432
433static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
434{
435 int ret;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700436 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800437 u8 alarm0_conf;
438 struct rtc_time tm;
439
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700440 ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data,
441 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800442 if (ret < 0)
443 return ret;
444
445 s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
446 dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
447 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
448 tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
449
450 switch (info->device_type) {
451 case S5M8763X:
452 alarm0_conf = 0x77;
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700453 ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800454 break;
455
456 case S5M8767X:
457 data[RTC_SEC] |= ALARM_ENABLE_MASK;
458 data[RTC_MIN] |= ALARM_ENABLE_MASK;
459 data[RTC_HOUR] |= ALARM_ENABLE_MASK;
460 data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
461 if (data[RTC_DATE] & 0x1f)
462 data[RTC_DATE] |= ALARM_ENABLE_MASK;
463 if (data[RTC_MONTH] & 0xf)
464 data[RTC_MONTH] |= ALARM_ENABLE_MASK;
465 if (data[RTC_YEAR1] & 0x7f)
466 data[RTC_YEAR1] |= ALARM_ENABLE_MASK;
467
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700468 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
469 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800470 if (ret < 0)
471 return ret;
472 ret = s5m8767_rtc_set_alarm_reg(info);
473
474 break;
475
476 default:
477 return -EINVAL;
478 }
479
480 return ret;
481}
482
483static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
484{
485 struct s5m_rtc_info *info = dev_get_drvdata(dev);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700486 u8 data[info->regs->regs_count];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800487 int ret;
488
489 switch (info->device_type) {
490 case S5M8763X:
491 s5m8763_tm_to_data(&alrm->time, data);
492 break;
493
494 case S5M8767X:
495 s5m8767_tm_to_data(&alrm->time, data);
496 break;
497
498 default:
499 return -EINVAL;
500 }
501
502 dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
503 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
504 alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
505 alrm->time.tm_sec, alrm->time.tm_wday);
506
507 ret = s5m_rtc_stop_alarm(info);
508 if (ret < 0)
509 return ret;
510
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700511 ret = regmap_raw_write(info->regmap, info->regs->alarm0, data,
512 info->regs->regs_count);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800513 if (ret < 0)
514 return ret;
515
516 ret = s5m8767_rtc_set_alarm_reg(info);
517 if (ret < 0)
518 return ret;
519
520 if (alrm->enabled)
521 ret = s5m_rtc_start_alarm(info);
522
523 return ret;
524}
525
526static int s5m_rtc_alarm_irq_enable(struct device *dev,
527 unsigned int enabled)
528{
529 struct s5m_rtc_info *info = dev_get_drvdata(dev);
530
531 if (enabled)
532 return s5m_rtc_start_alarm(info);
533 else
534 return s5m_rtc_stop_alarm(info);
535}
536
537static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
538{
539 struct s5m_rtc_info *info = data;
540
541 rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
542
543 return IRQ_HANDLED;
544}
545
546static const struct rtc_class_ops s5m_rtc_ops = {
547 .read_time = s5m_rtc_read_time,
548 .set_time = s5m_rtc_set_time,
549 .read_alarm = s5m_rtc_read_alarm,
550 .set_alarm = s5m_rtc_set_alarm,
551 .alarm_irq_enable = s5m_rtc_alarm_irq_enable,
552};
553
554static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
555{
556 int ret;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700557 ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800558 WTSR_ENABLE_MASK,
559 enable ? WTSR_ENABLE_MASK : 0);
560 if (ret < 0)
561 dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
562 __func__, ret);
563}
564
565static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
566{
567 int ret;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700568 ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800569 SMPL_ENABLE_MASK,
570 enable ? SMPL_ENABLE_MASK : 0);
571 if (ret < 0)
572 dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
573 __func__, ret);
574}
575
576static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
577{
578 u8 data[2];
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800579 int ret;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800580
Krzysztof Kozlowski0c5f5d92014-06-10 15:18:43 -0700581 /* UDR update time. Default of 7.32 ms is too long. */
582 ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON,
583 S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US);
584 if (ret < 0)
585 dev_err(info->dev, "%s: fail to change UDR time: %d\n",
586 __func__, ret);
587
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800588 /* Set RTC control register : Binary mode, 24hour mode */
589 data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
590 data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
591
592 info->rtc_24hr_mode = 1;
Krzysztof Kozlowski602cb5b2014-06-10 15:18:40 -0700593 ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800594 if (ret < 0) {
595 dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
596 __func__, ret);
597 return ret;
598 }
599
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800600 return ret;
601}
602
603static int s5m_rtc_probe(struct platform_device *pdev)
604{
605 struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
606 struct sec_platform_data *pdata = s5m87xx->pdata;
607 struct s5m_rtc_info *info;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200608 const struct regmap_config *regmap_cfg;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800609 int ret;
610
611 if (!pdata) {
612 dev_err(pdev->dev.parent, "Platform data not supplied\n");
613 return -ENODEV;
614 }
615
616 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
617 if (!info)
618 return -ENOMEM;
619
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200620 switch (pdata->device_type) {
621 case S2MPS14X:
622 regmap_cfg = &s2mps14_rtc_regmap_config;
623 break;
624 case S5M8763X:
625 regmap_cfg = &s5m_rtc_regmap_config;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700626 info->regs = &s5m_rtc_regs;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200627 break;
628 case S5M8767X:
629 regmap_cfg = &s5m_rtc_regmap_config;
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700630 info->regs = &s5m_rtc_regs;
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200631 break;
632 default:
633 dev_err(&pdev->dev, "Device type is not supported by RTC driver\n");
634 return -ENODEV;
635 }
636
637 info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
638 if (!info->i2c) {
639 dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
640 return -ENODEV;
641 }
642
643 info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
644 if (IS_ERR(info->regmap)) {
645 ret = PTR_ERR(info->regmap);
646 dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
647 ret);
648 goto err;
649 }
650
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800651 info->dev = &pdev->dev;
652 info->s5m87xx = s5m87xx;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800653 info->device_type = s5m87xx->device_type;
654 info->wtsr_smpl = s5m87xx->wtsr_smpl;
655
656 switch (pdata->device_type) {
657 case S5M8763X:
Krzysztof Kozlowski7b003be2013-12-12 17:12:26 -0800658 info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
659 S5M8763_IRQ_ALARM0);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800660 break;
661
662 case S5M8767X:
Krzysztof Kozlowski7b003be2013-12-12 17:12:26 -0800663 info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
664 S5M8767_IRQ_RTCA1);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800665 break;
666
667 default:
668 ret = -EINVAL;
669 dev_err(&pdev->dev, "Unsupported device type: %d\n", ret);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200670 goto err;
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800671 }
672
673 platform_set_drvdata(pdev, info);
674
675 ret = s5m8767_rtc_init_reg(info);
676
677 if (info->wtsr_smpl) {
678 s5m_rtc_enable_wtsr(info, true);
679 s5m_rtc_enable_smpl(info, true);
680 }
681
682 device_init_wakeup(&pdev->dev, 1);
683
684 info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
685 &s5m_rtc_ops, THIS_MODULE);
686
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200687 if (IS_ERR(info->rtc_dev)) {
688 ret = PTR_ERR(info->rtc_dev);
689 goto err;
690 }
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800691
692 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
693 s5m_rtc_alarm_irq, 0, "rtc-alarm0",
694 info);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200695 if (ret < 0) {
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800696 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
697 info->irq, ret);
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200698 goto err;
699 }
700
701 return 0;
702
703err:
704 i2c_unregister_device(info->i2c);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800705
706 return ret;
707}
708
709static void s5m_rtc_shutdown(struct platform_device *pdev)
710{
711 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
712 int i;
713 unsigned int val = 0;
714 if (info->wtsr_smpl) {
715 for (i = 0; i < 3; i++) {
716 s5m_rtc_enable_wtsr(info, false);
Krzysztof Kozlowskif8b23bb2014-06-10 15:18:44 -0700717 regmap_read(info->regmap, info->regs->smpl_wtsr, &val);
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800718 pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
719 if (val & WTSR_ENABLE_MASK)
720 pr_emerg("%s: fail to disable WTSR\n",
721 __func__);
722 else {
723 pr_info("%s: success to disable WTSR\n",
724 __func__);
725 break;
726 }
727 }
728 }
729 /* Disable SMPL when power off */
730 s5m_rtc_enable_smpl(info, false);
731}
732
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200733static int s5m_rtc_remove(struct platform_device *pdev)
734{
735 struct s5m_rtc_info *info = platform_get_drvdata(pdev);
736
737 /* Perform also all shutdown steps when removing */
738 s5m_rtc_shutdown(pdev);
739 i2c_unregister_device(info->i2c);
740
741 return 0;
742}
743
Geert Uytterhoeven11ba5a12014-01-23 15:55:19 -0800744#ifdef CONFIG_PM_SLEEP
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800745static int s5m_rtc_resume(struct device *dev)
746{
747 struct s5m_rtc_info *info = dev_get_drvdata(dev);
748 int ret = 0;
749
750 if (device_may_wakeup(dev))
751 ret = disable_irq_wake(info->irq);
752
753 return ret;
754}
755
756static int s5m_rtc_suspend(struct device *dev)
757{
758 struct s5m_rtc_info *info = dev_get_drvdata(dev);
759 int ret = 0;
760
761 if (device_may_wakeup(dev))
762 ret = enable_irq_wake(info->irq);
763
764 return ret;
765}
Geert Uytterhoeven11ba5a12014-01-23 15:55:19 -0800766#endif /* CONFIG_PM_SLEEP */
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800767
768static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
769
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800770static const struct platform_device_id s5m_rtc_id[] = {
771 { "s5m-rtc", 0 },
772};
773
774static struct platform_driver s5m_rtc_driver = {
775 .driver = {
776 .name = "s5m-rtc",
777 .owner = THIS_MODULE,
Krzysztof Kozlowski222ead72013-12-12 17:12:30 -0800778 .pm = &s5m_rtc_pm_ops,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800779 },
780 .probe = s5m_rtc_probe,
Krzysztof Kozlowskie349c912014-04-14 09:40:45 +0200781 .remove = s5m_rtc_remove,
Sangbeom Kim5bccae62013-11-12 15:11:04 -0800782 .shutdown = s5m_rtc_shutdown,
783 .id_table = s5m_rtc_id,
784};
785
786module_platform_driver(s5m_rtc_driver);
787
788/* Module information */
789MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
790MODULE_DESCRIPTION("Samsung S5M RTC driver");
791MODULE_LICENSE("GPL");
792MODULE_ALIAS("platform:s5m-rtc");