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Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -07001/* rtc-da9063.c - Real time clock device driver for DA9063
Steve Twissce006ca2015-10-02 11:21:11 +01002 * Copyright (C) 2013-2015 Dialog Semiconductor Ltd.
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -07003 *
Steve Twissce006ca2015-10-02 11:21:11 +01004 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -07008 *
Steve Twissce006ca2015-10-02 11:21:11 +01009 * This program is distributed in the hope that it will be useful,
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Steve Twissce006ca2015-10-02 11:21:11 +010011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070013 */
14
S Twiss80ca3272015-07-21 11:29:07 +010015#include <linux/delay.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070018#include <linux/kernel.h>
19#include <linux/module.h>
S Twiss80ca3272015-07-21 11:29:07 +010020#include <linux/of.h>
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070021#include <linux/platform_device.h>
S Twiss80ca3272015-07-21 11:29:07 +010022#include <linux/regmap.h>
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070023#include <linux/rtc.h>
24#include <linux/slab.h>
S Twiss80ca3272015-07-21 11:29:07 +010025
26#include <linux/mfd/da9062/registers.h>
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070027#include <linux/mfd/da9063/registers.h>
28#include <linux/mfd/da9063/core.h>
29
30#define YEARS_TO_DA9063(year) ((year) - 100)
31#define MONTHS_TO_DA9063(month) ((month) + 1)
32#define YEARS_FROM_DA9063(year) ((year) + 100)
33#define MONTHS_FROM_DA9063(month) ((month) - 1)
34
S Twiss80ca3272015-07-21 11:29:07 +010035enum {
36 RTC_SEC = 0,
37 RTC_MIN = 1,
38 RTC_HOUR = 2,
39 RTC_DAY = 3,
40 RTC_MONTH = 4,
41 RTC_YEAR = 5,
42 RTC_DATA_LEN
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -070043};
44
S Twiss80ca3272015-07-21 11:29:07 +010045struct da9063_compatible_rtc_regmap {
46 /* REGS */
47 int rtc_enable_reg;
48 int rtc_enable_32k_crystal_reg;
49 int rtc_alarm_secs_reg;
50 int rtc_alarm_year_reg;
51 int rtc_count_secs_reg;
52 int rtc_count_year_reg;
53 int rtc_event_reg;
54 /* MASKS */
55 int rtc_enable_mask;
56 int rtc_crystal_mask;
57 int rtc_event_alarm_mask;
58 int rtc_alarm_on_mask;
59 int rtc_alarm_status_mask;
60 int rtc_tick_on_mask;
61 int rtc_ready_to_read_mask;
62 int rtc_count_sec_mask;
63 int rtc_count_min_mask;
64 int rtc_count_hour_mask;
65 int rtc_count_day_mask;
66 int rtc_count_month_mask;
67 int rtc_count_year_mask;
68 /* ALARM CONFIG */
69 int rtc_data_start;
70 int rtc_alarm_len;
71};
72
73struct da9063_compatible_rtc {
74 struct rtc_device *rtc_dev;
75 struct rtc_time alarm_time;
76 struct regmap *regmap;
77 const struct da9063_compatible_rtc_regmap *config;
78 bool rtc_sync;
79};
80
81static const struct da9063_compatible_rtc_regmap da9063_ad_regs = {
82 /* REGS */
83 .rtc_enable_reg = DA9063_REG_CONTROL_E,
84 .rtc_alarm_secs_reg = DA9063_AD_REG_ALARM_MI,
85 .rtc_alarm_year_reg = DA9063_AD_REG_ALARM_Y,
86 .rtc_count_secs_reg = DA9063_REG_COUNT_S,
87 .rtc_count_year_reg = DA9063_REG_COUNT_Y,
88 .rtc_event_reg = DA9063_REG_EVENT_A,
89 /* MASKS */
90 .rtc_enable_mask = DA9063_RTC_EN,
91 .rtc_crystal_mask = DA9063_CRYSTAL,
92 .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K,
93 .rtc_event_alarm_mask = DA9063_E_ALARM,
94 .rtc_alarm_on_mask = DA9063_ALARM_ON,
95 .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM |
96 DA9063_ALARM_STATUS_TICK,
97 .rtc_tick_on_mask = DA9063_TICK_ON,
98 .rtc_ready_to_read_mask = DA9063_RTC_READ,
99 .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK,
100 .rtc_count_min_mask = DA9063_COUNT_MIN_MASK,
101 .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK,
102 .rtc_count_day_mask = DA9063_COUNT_DAY_MASK,
103 .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK,
104 .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK,
105 /* ALARM CONFIG */
106 .rtc_data_start = RTC_MIN,
107 .rtc_alarm_len = RTC_DATA_LEN - 1,
108};
109
110static const struct da9063_compatible_rtc_regmap da9063_bb_regs = {
111 /* REGS */
112 .rtc_enable_reg = DA9063_REG_CONTROL_E,
113 .rtc_alarm_secs_reg = DA9063_BB_REG_ALARM_S,
114 .rtc_alarm_year_reg = DA9063_BB_REG_ALARM_Y,
115 .rtc_count_secs_reg = DA9063_REG_COUNT_S,
116 .rtc_count_year_reg = DA9063_REG_COUNT_Y,
117 .rtc_event_reg = DA9063_REG_EVENT_A,
118 /* MASKS */
119 .rtc_enable_mask = DA9063_RTC_EN,
120 .rtc_crystal_mask = DA9063_CRYSTAL,
121 .rtc_enable_32k_crystal_reg = DA9063_REG_EN_32K,
122 .rtc_event_alarm_mask = DA9063_E_ALARM,
123 .rtc_alarm_on_mask = DA9063_ALARM_ON,
124 .rtc_alarm_status_mask = DA9063_ALARM_STATUS_ALARM |
125 DA9063_ALARM_STATUS_TICK,
126 .rtc_tick_on_mask = DA9063_TICK_ON,
127 .rtc_ready_to_read_mask = DA9063_RTC_READ,
128 .rtc_count_sec_mask = DA9063_COUNT_SEC_MASK,
129 .rtc_count_min_mask = DA9063_COUNT_MIN_MASK,
130 .rtc_count_hour_mask = DA9063_COUNT_HOUR_MASK,
131 .rtc_count_day_mask = DA9063_COUNT_DAY_MASK,
132 .rtc_count_month_mask = DA9063_COUNT_MONTH_MASK,
133 .rtc_count_year_mask = DA9063_COUNT_YEAR_MASK,
134 /* ALARM CONFIG */
135 .rtc_data_start = RTC_SEC,
136 .rtc_alarm_len = RTC_DATA_LEN,
137};
138
139static const struct da9063_compatible_rtc_regmap da9062_aa_regs = {
140 /* REGS */
141 .rtc_enable_reg = DA9062AA_CONTROL_E,
142 .rtc_alarm_secs_reg = DA9062AA_ALARM_S,
143 .rtc_alarm_year_reg = DA9062AA_ALARM_Y,
144 .rtc_count_secs_reg = DA9062AA_COUNT_S,
145 .rtc_count_year_reg = DA9062AA_COUNT_Y,
146 .rtc_event_reg = DA9062AA_EVENT_A,
147 /* MASKS */
148 .rtc_enable_mask = DA9062AA_RTC_EN_MASK,
149 .rtc_crystal_mask = DA9062AA_CRYSTAL_MASK,
150 .rtc_enable_32k_crystal_reg = DA9062AA_EN_32K,
151 .rtc_event_alarm_mask = DA9062AA_M_ALARM_MASK,
152 .rtc_alarm_on_mask = DA9062AA_ALARM_ON_MASK,
153 .rtc_alarm_status_mask = (0x02 << 6),
154 .rtc_tick_on_mask = DA9062AA_TICK_ON_MASK,
155 .rtc_ready_to_read_mask = DA9062AA_RTC_READ_MASK,
156 .rtc_count_sec_mask = DA9062AA_COUNT_SEC_MASK,
157 .rtc_count_min_mask = DA9062AA_COUNT_MIN_MASK,
158 .rtc_count_hour_mask = DA9062AA_COUNT_HOUR_MASK,
159 .rtc_count_day_mask = DA9062AA_COUNT_DAY_MASK,
160 .rtc_count_month_mask = DA9062AA_COUNT_MONTH_MASK,
161 .rtc_count_year_mask = DA9062AA_COUNT_YEAR_MASK,
162 /* ALARM CONFIG */
163 .rtc_data_start = RTC_SEC,
164 .rtc_alarm_len = RTC_DATA_LEN,
165};
166
167static const struct of_device_id da9063_compatible_reg_id_table[] = {
168 { .compatible = "dlg,da9063-rtc", .data = &da9063_bb_regs },
169 { .compatible = "dlg,da9062-rtc", .data = &da9062_aa_regs },
170 { },
171};
Javier Martinez Canillas73798d52015-08-27 13:52:02 +0200172MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
S Twiss80ca3272015-07-21 11:29:07 +0100173
174static void da9063_data_to_tm(u8 *data, struct rtc_time *tm,
175 struct da9063_compatible_rtc *rtc)
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700176{
S Twiss80ca3272015-07-21 11:29:07 +0100177 const struct da9063_compatible_rtc_regmap *config = rtc->config;
178
179 tm->tm_sec = data[RTC_SEC] & config->rtc_count_sec_mask;
180 tm->tm_min = data[RTC_MIN] & config->rtc_count_min_mask;
181 tm->tm_hour = data[RTC_HOUR] & config->rtc_count_hour_mask;
182 tm->tm_mday = data[RTC_DAY] & config->rtc_count_day_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700183 tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] &
S Twiss80ca3272015-07-21 11:29:07 +0100184 config->rtc_count_month_mask);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700185 tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] &
S Twiss80ca3272015-07-21 11:29:07 +0100186 config->rtc_count_year_mask);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700187}
188
S Twiss80ca3272015-07-21 11:29:07 +0100189static void da9063_tm_to_data(struct rtc_time *tm, u8 *data,
190 struct da9063_compatible_rtc *rtc)
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700191{
S Twiss80ca3272015-07-21 11:29:07 +0100192 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700193
S Twiss80ca3272015-07-21 11:29:07 +0100194 data[RTC_SEC] &= ~config->rtc_count_sec_mask;
195 data[RTC_SEC] |= tm->tm_sec & config->rtc_count_sec_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700196
S Twiss80ca3272015-07-21 11:29:07 +0100197 data[RTC_MIN] &= ~config->rtc_count_min_mask;
198 data[RTC_MIN] |= tm->tm_min & config->rtc_count_min_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700199
S Twiss80ca3272015-07-21 11:29:07 +0100200 data[RTC_HOUR] &= ~config->rtc_count_hour_mask;
201 data[RTC_HOUR] |= tm->tm_hour & config->rtc_count_hour_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700202
S Twiss80ca3272015-07-21 11:29:07 +0100203 data[RTC_DAY] &= ~config->rtc_count_day_mask;
204 data[RTC_DAY] |= tm->tm_mday & config->rtc_count_day_mask;
205
206 data[RTC_MONTH] &= ~config->rtc_count_month_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700207 data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) &
S Twiss80ca3272015-07-21 11:29:07 +0100208 config->rtc_count_month_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700209
S Twiss80ca3272015-07-21 11:29:07 +0100210 data[RTC_YEAR] &= ~config->rtc_count_year_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700211 data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) &
S Twiss80ca3272015-07-21 11:29:07 +0100212 config->rtc_count_year_mask;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700213}
214
215static int da9063_rtc_stop_alarm(struct device *dev)
216{
S Twiss80ca3272015-07-21 11:29:07 +0100217 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
218 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700219
S Twiss80ca3272015-07-21 11:29:07 +0100220 return regmap_update_bits(rtc->regmap,
221 config->rtc_alarm_year_reg,
222 config->rtc_alarm_on_mask,
223 0);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700224}
225
226static int da9063_rtc_start_alarm(struct device *dev)
227{
S Twiss80ca3272015-07-21 11:29:07 +0100228 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
229 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700230
S Twiss80ca3272015-07-21 11:29:07 +0100231 return regmap_update_bits(rtc->regmap,
232 config->rtc_alarm_year_reg,
233 config->rtc_alarm_on_mask,
234 config->rtc_alarm_on_mask);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700235}
236
237static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm)
238{
S Twiss80ca3272015-07-21 11:29:07 +0100239 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
240 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700241 unsigned long tm_secs;
242 unsigned long al_secs;
243 u8 data[RTC_DATA_LEN];
244 int ret;
245
S Twiss80ca3272015-07-21 11:29:07 +0100246 ret = regmap_bulk_read(rtc->regmap,
247 config->rtc_count_secs_reg,
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700248 data, RTC_DATA_LEN);
249 if (ret < 0) {
250 dev_err(dev, "Failed to read RTC time data: %d\n", ret);
251 return ret;
252 }
253
S Twiss80ca3272015-07-21 11:29:07 +0100254 if (!(data[RTC_SEC] & config->rtc_ready_to_read_mask)) {
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700255 dev_dbg(dev, "RTC not yet ready to be read by the host\n");
256 return -EINVAL;
257 }
258
S Twiss80ca3272015-07-21 11:29:07 +0100259 da9063_data_to_tm(data, tm, rtc);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700260
261 rtc_tm_to_time(tm, &tm_secs);
262 rtc_tm_to_time(&rtc->alarm_time, &al_secs);
263
264 /* handle the rtc synchronisation delay */
265 if (rtc->rtc_sync == true && al_secs - tm_secs == 1)
266 memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time));
267 else
268 rtc->rtc_sync = false;
269
270 return rtc_valid_tm(tm);
271}
272
273static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm)
274{
S Twiss80ca3272015-07-21 11:29:07 +0100275 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
276 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700277 u8 data[RTC_DATA_LEN];
278 int ret;
279
S Twiss80ca3272015-07-21 11:29:07 +0100280 da9063_tm_to_data(tm, data, rtc);
281 ret = regmap_bulk_write(rtc->regmap,
282 config->rtc_count_secs_reg,
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700283 data, RTC_DATA_LEN);
284 if (ret < 0)
285 dev_err(dev, "Failed to set RTC time data: %d\n", ret);
286
287 return ret;
288}
289
290static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
291{
S Twiss80ca3272015-07-21 11:29:07 +0100292 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
293 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700294 u8 data[RTC_DATA_LEN];
295 int ret;
296 unsigned int val;
297
Opensource [Steve Twiss]9cb42e22014-07-21 11:39:33 +0100298 data[RTC_SEC] = 0;
S Twiss80ca3272015-07-21 11:29:07 +0100299 ret = regmap_bulk_read(rtc->regmap,
300 config->rtc_alarm_secs_reg,
301 &data[config->rtc_data_start],
302 config->rtc_alarm_len);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700303 if (ret < 0)
304 return ret;
305
S Twiss80ca3272015-07-21 11:29:07 +0100306 da9063_data_to_tm(data, &alrm->time, rtc);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700307
S Twiss80ca3272015-07-21 11:29:07 +0100308 alrm->enabled = !!(data[RTC_YEAR] & config->rtc_alarm_on_mask);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700309
S Twiss80ca3272015-07-21 11:29:07 +0100310 ret = regmap_read(rtc->regmap,
311 config->rtc_event_reg,
312 &val);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700313 if (ret < 0)
314 return ret;
315
S Twiss80ca3272015-07-21 11:29:07 +0100316 if (val & config->rtc_event_alarm_mask)
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700317 alrm->pending = 1;
318 else
319 alrm->pending = 0;
320
321 return 0;
322}
323
324static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
325{
S Twiss80ca3272015-07-21 11:29:07 +0100326 struct da9063_compatible_rtc *rtc = dev_get_drvdata(dev);
327 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700328 u8 data[RTC_DATA_LEN];
329 int ret;
330
S Twiss80ca3272015-07-21 11:29:07 +0100331 da9063_tm_to_data(&alrm->time, data, rtc);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700332
333 ret = da9063_rtc_stop_alarm(dev);
334 if (ret < 0) {
335 dev_err(dev, "Failed to stop alarm: %d\n", ret);
336 return ret;
337 }
338
S Twiss80ca3272015-07-21 11:29:07 +0100339 ret = regmap_bulk_write(rtc->regmap,
340 config->rtc_alarm_secs_reg,
341 &data[config->rtc_data_start],
342 config->rtc_alarm_len);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700343 if (ret < 0) {
344 dev_err(dev, "Failed to write alarm: %d\n", ret);
345 return ret;
346 }
347
S Twiss80ca3272015-07-21 11:29:07 +0100348 da9063_data_to_tm(data, &rtc->alarm_time, rtc);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700349
350 if (alrm->enabled) {
351 ret = da9063_rtc_start_alarm(dev);
352 if (ret < 0) {
353 dev_err(dev, "Failed to start alarm: %d\n", ret);
354 return ret;
355 }
356 }
357
358 return ret;
359}
360
S Twiss80ca3272015-07-21 11:29:07 +0100361static int da9063_rtc_alarm_irq_enable(struct device *dev,
362 unsigned int enabled)
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700363{
364 if (enabled)
365 return da9063_rtc_start_alarm(dev);
366 else
367 return da9063_rtc_stop_alarm(dev);
368}
369
370static irqreturn_t da9063_alarm_event(int irq, void *data)
371{
S Twiss80ca3272015-07-21 11:29:07 +0100372 struct da9063_compatible_rtc *rtc = data;
373 const struct da9063_compatible_rtc_regmap *config = rtc->config;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700374
S Twiss80ca3272015-07-21 11:29:07 +0100375 regmap_update_bits(rtc->regmap,
376 config->rtc_alarm_year_reg,
377 config->rtc_alarm_on_mask,
378 0);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700379
380 rtc->rtc_sync = true;
381 rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF);
382
383 return IRQ_HANDLED;
384}
385
386static const struct rtc_class_ops da9063_rtc_ops = {
387 .read_time = da9063_rtc_read_time,
388 .set_time = da9063_rtc_set_time,
389 .read_alarm = da9063_rtc_read_alarm,
390 .set_alarm = da9063_rtc_set_alarm,
391 .alarm_irq_enable = da9063_rtc_alarm_irq_enable,
392};
393
394static int da9063_rtc_probe(struct platform_device *pdev)
395{
S Twiss80ca3272015-07-21 11:29:07 +0100396 struct da9063_compatible_rtc *rtc;
397 const struct da9063_compatible_rtc_regmap *config;
398 const struct of_device_id *match;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700399 int irq_alarm;
400 u8 data[RTC_DATA_LEN];
401 int ret;
402
S Twiss80ca3272015-07-21 11:29:07 +0100403 if (!pdev->dev.of_node)
404 return -ENXIO;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700405
S Twiss80ca3272015-07-21 11:29:07 +0100406 match = of_match_node(da9063_compatible_reg_id_table,
407 pdev->dev.of_node);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700408
Opensource [Steve Twiss]9cb42e22014-07-21 11:39:33 +0100409 rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
410 if (!rtc)
411 return -ENOMEM;
412
S Twiss80ca3272015-07-21 11:29:07 +0100413 rtc->config = match->data;
414 if (of_device_is_compatible(pdev->dev.of_node, "dlg,da9063-rtc")) {
415 struct da9063 *chip = dev_get_drvdata(pdev->dev.parent);
416
417 if (chip->variant_code == PMIC_DA9063_AD)
418 rtc->config = &da9063_ad_regs;
Opensource [Steve Twiss]9cb42e22014-07-21 11:39:33 +0100419 }
420
S Twiss80ca3272015-07-21 11:29:07 +0100421 rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL);
422 if (!rtc->regmap) {
423 dev_warn(&pdev->dev, "Parent regmap unavailable.\n");
424 return -ENXIO;
425 }
426
427 config = rtc->config;
428 ret = regmap_update_bits(rtc->regmap,
429 config->rtc_enable_reg,
430 config->rtc_enable_mask,
431 config->rtc_enable_mask);
432 if (ret < 0) {
433 dev_err(&pdev->dev, "Failed to enable RTC\n");
434 return ret;
435 }
436
437 ret = regmap_update_bits(rtc->regmap,
438 config->rtc_enable_32k_crystal_reg,
439 config->rtc_crystal_mask,
440 config->rtc_crystal_mask);
441 if (ret < 0) {
442 dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n");
443 return ret;
444 }
445
446 ret = regmap_update_bits(rtc->regmap,
447 config->rtc_alarm_secs_reg,
448 config->rtc_alarm_status_mask,
449 0);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700450 if (ret < 0) {
451 dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
S Twiss80ca3272015-07-21 11:29:07 +0100452 return ret;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700453 }
454
S Twiss80ca3272015-07-21 11:29:07 +0100455 ret = regmap_update_bits(rtc->regmap,
456 config->rtc_alarm_secs_reg,
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700457 DA9063_ALARM_STATUS_ALARM,
458 DA9063_ALARM_STATUS_ALARM);
459 if (ret < 0) {
460 dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
S Twiss80ca3272015-07-21 11:29:07 +0100461 return ret;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700462 }
463
S Twiss80ca3272015-07-21 11:29:07 +0100464 ret = regmap_update_bits(rtc->regmap,
465 config->rtc_alarm_year_reg,
466 config->rtc_tick_on_mask,
467 0);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700468 if (ret < 0) {
469 dev_err(&pdev->dev, "Failed to disable TICKs\n");
S Twiss80ca3272015-07-21 11:29:07 +0100470 return ret;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700471 }
472
Opensource [Steve Twiss]9cb42e22014-07-21 11:39:33 +0100473 data[RTC_SEC] = 0;
S Twiss80ca3272015-07-21 11:29:07 +0100474 ret = regmap_bulk_read(rtc->regmap,
475 config->rtc_alarm_secs_reg,
476 &data[config->rtc_data_start],
477 config->rtc_alarm_len);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700478 if (ret < 0) {
479 dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n",
480 ret);
S Twiss80ca3272015-07-21 11:29:07 +0100481 return ret;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700482 }
483
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700484 platform_set_drvdata(pdev, rtc);
485
486 irq_alarm = platform_get_irq_byname(pdev, "ALARM");
487 ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
488 da9063_alarm_event,
489 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
490 "ALARM", rtc);
491 if (ret) {
492 dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n",
493 irq_alarm, ret);
S Twiss80ca3272015-07-21 11:29:07 +0100494 return ret;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700495 }
496
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700497 rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC,
498 &da9063_rtc_ops, THIS_MODULE);
499 if (IS_ERR(rtc->rtc_dev))
500 return PTR_ERR(rtc->rtc_dev);
501
S Twiss80ca3272015-07-21 11:29:07 +0100502 da9063_data_to_tm(data, &rtc->alarm_time, rtc);
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700503 rtc->rtc_sync = false;
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700504 return ret;
505}
506
507static struct platform_driver da9063_rtc_driver = {
508 .probe = da9063_rtc_probe,
509 .driver = {
510 .name = DA9063_DRVNAME_RTC,
S Twiss80ca3272015-07-21 11:29:07 +0100511 .of_match_table = da9063_compatible_reg_id_table,
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700512 },
513};
514
515module_platform_driver(da9063_rtc_driver);
516
517MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
518MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
Steve Twissce006ca2015-10-02 11:21:11 +0100519MODULE_LICENSE("GPL");
Opensource [Steve Twiss]c2a57552014-06-06 14:36:03 -0700520MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);