Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 1 | /* |
| 2 | * RTC driver for Maxim MAX77686 |
| 3 | * |
| 4 | * Copyright (C) 2012 Samsung Electronics Co.Ltd |
| 5 | * |
| 6 | * based on rtc-max8997.c |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | */ |
| 14 | |
Joe Perches | a737e83 | 2015-04-16 12:46:14 -0700 | [diff] [blame] | 15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 16 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 17 | #include <linux/slab.h> |
| 18 | #include <linux/rtc.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/mutex.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/mfd/max77686-private.h> |
| 24 | #include <linux/irqdomain.h> |
| 25 | #include <linux/regmap.h> |
| 26 | |
| 27 | /* RTC Control Register */ |
| 28 | #define BCD_EN_SHIFT 0 |
Jingoo Han | ac60bf3 | 2013-04-29 16:18:31 -0700 | [diff] [blame] | 29 | #define BCD_EN_MASK (1 << BCD_EN_SHIFT) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 30 | #define MODEL24_SHIFT 1 |
| 31 | #define MODEL24_MASK (1 << MODEL24_SHIFT) |
| 32 | /* RTC Update Register1 */ |
| 33 | #define RTC_UDR_SHIFT 0 |
| 34 | #define RTC_UDR_MASK (1 << RTC_UDR_SHIFT) |
| 35 | #define RTC_RBUDR_SHIFT 4 |
| 36 | #define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 37 | /* RTC Hour register */ |
| 38 | #define HOUR_PM_SHIFT 6 |
| 39 | #define HOUR_PM_MASK (1 << HOUR_PM_SHIFT) |
| 40 | /* RTC Alarm Enable */ |
| 41 | #define ALARM_ENABLE_SHIFT 7 |
| 42 | #define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT) |
| 43 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 44 | enum { |
| 45 | RTC_SEC = 0, |
| 46 | RTC_MIN, |
| 47 | RTC_HOUR, |
| 48 | RTC_WEEKDAY, |
| 49 | RTC_MONTH, |
| 50 | RTC_YEAR, |
| 51 | RTC_DATE, |
| 52 | RTC_NR_TIME |
| 53 | }; |
| 54 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 55 | struct max77686_rtc_driver_data { |
| 56 | /* Minimum usecs needed for a RTC update */ |
| 57 | unsigned long delay; |
| 58 | /* Mask used to read RTC registers value */ |
| 59 | u8 mask; |
| 60 | }; |
| 61 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 62 | struct max77686_rtc_info { |
| 63 | struct device *dev; |
| 64 | struct max77686_dev *max77686; |
| 65 | struct i2c_client *rtc; |
| 66 | struct rtc_device *rtc_dev; |
| 67 | struct mutex lock; |
| 68 | |
| 69 | struct regmap *regmap; |
| 70 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 71 | const struct max77686_rtc_driver_data *drv_data; |
| 72 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 73 | int virq; |
| 74 | int rtc_24hr_mode; |
| 75 | }; |
| 76 | |
| 77 | enum MAX77686_RTC_OP { |
| 78 | MAX77686_RTC_WRITE, |
| 79 | MAX77686_RTC_READ, |
| 80 | }; |
| 81 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 82 | static const struct max77686_rtc_driver_data max77686_drv_data = { |
| 83 | .delay = 16000, |
| 84 | .mask = 0x7f, |
| 85 | }; |
| 86 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 87 | static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 88 | struct max77686_rtc_info *info) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 89 | { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 90 | u8 mask = info->drv_data->mask; |
| 91 | |
| 92 | tm->tm_sec = data[RTC_SEC] & mask; |
| 93 | tm->tm_min = data[RTC_MIN] & mask; |
| 94 | if (info->rtc_24hr_mode) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 95 | tm->tm_hour = data[RTC_HOUR] & 0x1f; |
| 96 | else { |
| 97 | tm->tm_hour = data[RTC_HOUR] & 0x0f; |
| 98 | if (data[RTC_HOUR] & HOUR_PM_MASK) |
| 99 | tm->tm_hour += 12; |
| 100 | } |
| 101 | |
Javier Martinez Canillas | a20cd88 | 2014-10-13 15:53:03 -0700 | [diff] [blame] | 102 | /* Only a single bit is set in data[], so fls() would be equivalent */ |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 103 | tm->tm_wday = ffs(data[RTC_WEEKDAY] & mask) - 1; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 104 | tm->tm_mday = data[RTC_DATE] & 0x1f; |
| 105 | tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 106 | tm->tm_year = (data[RTC_YEAR] & mask) + 100; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 107 | tm->tm_yday = 0; |
| 108 | tm->tm_isdst = 0; |
| 109 | } |
| 110 | |
| 111 | static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) |
| 112 | { |
| 113 | data[RTC_SEC] = tm->tm_sec; |
| 114 | data[RTC_MIN] = tm->tm_min; |
| 115 | data[RTC_HOUR] = tm->tm_hour; |
| 116 | data[RTC_WEEKDAY] = 1 << tm->tm_wday; |
| 117 | data[RTC_DATE] = tm->tm_mday; |
| 118 | data[RTC_MONTH] = tm->tm_mon + 1; |
Sachin Kamat | cdf5f4a | 2013-07-03 15:05:55 -0700 | [diff] [blame] | 119 | data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 120 | |
| 121 | if (tm->tm_year < 100) { |
Joe Perches | a737e83 | 2015-04-16 12:46:14 -0700 | [diff] [blame] | 122 | pr_warn("RTC cannot handle the year %d. Assume it's 2000.\n", |
| 123 | 1900 + tm->tm_year); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 124 | return -EINVAL; |
| 125 | } |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int max77686_rtc_update(struct max77686_rtc_info *info, |
| 130 | enum MAX77686_RTC_OP op) |
| 131 | { |
| 132 | int ret; |
| 133 | unsigned int data; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 134 | unsigned long delay = info->drv_data->delay; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 135 | |
| 136 | if (op == MAX77686_RTC_WRITE) |
| 137 | data = 1 << RTC_UDR_SHIFT; |
| 138 | else |
| 139 | data = 1 << RTC_RBUDR_SHIFT; |
| 140 | |
| 141 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
| 142 | MAX77686_RTC_UPDATE0, data, data); |
| 143 | if (ret < 0) |
| 144 | dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", |
| 145 | __func__, ret, data); |
| 146 | else { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 147 | /* Minimum delay required before RTC update. */ |
| 148 | usleep_range(delay, delay * 2); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 155 | { |
| 156 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 157 | u8 data[RTC_NR_TIME]; |
| 158 | int ret; |
| 159 | |
| 160 | mutex_lock(&info->lock); |
| 161 | |
| 162 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 163 | if (ret < 0) |
| 164 | goto out; |
| 165 | |
| 166 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 167 | MAX77686_RTC_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 168 | if (ret < 0) { |
| 169 | dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); |
| 170 | goto out; |
| 171 | } |
| 172 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 173 | max77686_rtc_data_to_tm(data, tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 174 | |
| 175 | ret = rtc_valid_tm(tm); |
| 176 | |
| 177 | out: |
| 178 | mutex_unlock(&info->lock); |
| 179 | return ret; |
| 180 | } |
| 181 | |
| 182 | static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 183 | { |
| 184 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 185 | u8 data[RTC_NR_TIME]; |
| 186 | int ret; |
| 187 | |
| 188 | ret = max77686_rtc_tm_to_data(tm, data); |
| 189 | if (ret < 0) |
| 190 | return ret; |
| 191 | |
| 192 | mutex_lock(&info->lock); |
| 193 | |
| 194 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 195 | MAX77686_RTC_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 196 | if (ret < 0) { |
| 197 | dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, |
| 198 | ret); |
| 199 | goto out; |
| 200 | } |
| 201 | |
| 202 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 203 | |
| 204 | out: |
| 205 | mutex_unlock(&info->lock); |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 210 | { |
| 211 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 212 | u8 data[RTC_NR_TIME]; |
| 213 | unsigned int val; |
| 214 | int i, ret; |
| 215 | |
| 216 | mutex_lock(&info->lock); |
| 217 | |
| 218 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 219 | if (ret < 0) |
| 220 | goto out; |
| 221 | |
| 222 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 223 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 224 | if (ret < 0) { |
| 225 | dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", |
| 226 | __func__, __LINE__, ret); |
| 227 | goto out; |
| 228 | } |
| 229 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 230 | max77686_rtc_data_to_tm(data, &alrm->time, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 231 | |
| 232 | alrm->enabled = 0; |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 233 | for (i = 0; i < ARRAY_SIZE(data); i++) { |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 234 | if (data[i] & ALARM_ENABLE_MASK) { |
| 235 | alrm->enabled = 1; |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | alrm->pending = 0; |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 241 | ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 242 | if (ret < 0) { |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 243 | dev_err(info->dev, "%s:%d fail to read status2 reg(%d)\n", |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 244 | __func__, __LINE__, ret); |
| 245 | goto out; |
| 246 | } |
| 247 | |
| 248 | if (val & (1 << 4)) /* RTCA1 */ |
| 249 | alrm->pending = 1; |
| 250 | |
| 251 | out: |
| 252 | mutex_unlock(&info->lock); |
Javier Martinez Canillas | 7cdffeb | 2016-01-27 00:36:37 -0300 | [diff] [blame] | 253 | return ret; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) |
| 257 | { |
| 258 | u8 data[RTC_NR_TIME]; |
| 259 | int ret, i; |
| 260 | struct rtc_time tm; |
| 261 | |
| 262 | if (!mutex_is_locked(&info->lock)) |
| 263 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 264 | |
| 265 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 266 | if (ret < 0) |
| 267 | goto out; |
| 268 | |
| 269 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 270 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 271 | if (ret < 0) { |
| 272 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 273 | __func__, ret); |
| 274 | goto out; |
| 275 | } |
| 276 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 277 | max77686_rtc_data_to_tm(data, &tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 278 | |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 279 | for (i = 0; i < ARRAY_SIZE(data); i++) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 280 | data[i] &= ~ALARM_ENABLE_MASK; |
| 281 | |
| 282 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 283 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 284 | if (ret < 0) { |
| 285 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 286 | __func__, ret); |
| 287 | goto out; |
| 288 | } |
| 289 | |
| 290 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 291 | out: |
| 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) |
| 296 | { |
| 297 | u8 data[RTC_NR_TIME]; |
| 298 | int ret; |
| 299 | struct rtc_time tm; |
| 300 | |
| 301 | if (!mutex_is_locked(&info->lock)) |
| 302 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 303 | |
| 304 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 305 | if (ret < 0) |
| 306 | goto out; |
| 307 | |
| 308 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 309 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 310 | if (ret < 0) { |
| 311 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 312 | __func__, ret); |
| 313 | goto out; |
| 314 | } |
| 315 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 316 | max77686_rtc_data_to_tm(data, &tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 317 | |
| 318 | data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); |
| 319 | data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); |
| 320 | data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); |
| 321 | data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; |
| 322 | if (data[RTC_MONTH] & 0xf) |
| 323 | data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 324 | if (data[RTC_YEAR] & info->drv_data->mask) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 325 | data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); |
| 326 | if (data[RTC_DATE] & 0x1f) |
| 327 | data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); |
| 328 | |
| 329 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 330 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 331 | if (ret < 0) { |
| 332 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 333 | __func__, ret); |
| 334 | goto out; |
| 335 | } |
| 336 | |
| 337 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 338 | out: |
| 339 | return ret; |
| 340 | } |
| 341 | |
| 342 | static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 343 | { |
| 344 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 345 | u8 data[RTC_NR_TIME]; |
| 346 | int ret; |
| 347 | |
| 348 | ret = max77686_rtc_tm_to_data(&alrm->time, data); |
| 349 | if (ret < 0) |
| 350 | return ret; |
| 351 | |
| 352 | mutex_lock(&info->lock); |
| 353 | |
| 354 | ret = max77686_rtc_stop_alarm(info); |
| 355 | if (ret < 0) |
| 356 | goto out; |
| 357 | |
| 358 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 359 | MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 360 | |
| 361 | if (ret < 0) { |
| 362 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 363 | __func__, ret); |
| 364 | goto out; |
| 365 | } |
| 366 | |
| 367 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 368 | if (ret < 0) |
| 369 | goto out; |
| 370 | |
| 371 | if (alrm->enabled) |
| 372 | ret = max77686_rtc_start_alarm(info); |
| 373 | out: |
| 374 | mutex_unlock(&info->lock); |
| 375 | return ret; |
| 376 | } |
| 377 | |
| 378 | static int max77686_rtc_alarm_irq_enable(struct device *dev, |
| 379 | unsigned int enabled) |
| 380 | { |
| 381 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 382 | int ret; |
| 383 | |
| 384 | mutex_lock(&info->lock); |
| 385 | if (enabled) |
| 386 | ret = max77686_rtc_start_alarm(info); |
| 387 | else |
| 388 | ret = max77686_rtc_stop_alarm(info); |
| 389 | mutex_unlock(&info->lock); |
| 390 | |
| 391 | return ret; |
| 392 | } |
| 393 | |
| 394 | static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) |
| 395 | { |
| 396 | struct max77686_rtc_info *info = data; |
| 397 | |
| 398 | dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); |
| 399 | |
| 400 | rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); |
| 401 | |
| 402 | return IRQ_HANDLED; |
| 403 | } |
| 404 | |
| 405 | static const struct rtc_class_ops max77686_rtc_ops = { |
| 406 | .read_time = max77686_rtc_read_time, |
| 407 | .set_time = max77686_rtc_set_time, |
| 408 | .read_alarm = max77686_rtc_read_alarm, |
| 409 | .set_alarm = max77686_rtc_set_alarm, |
| 410 | .alarm_irq_enable = max77686_rtc_alarm_irq_enable, |
| 411 | }; |
| 412 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 413 | static int max77686_rtc_init_reg(struct max77686_rtc_info *info) |
| 414 | { |
| 415 | u8 data[2]; |
| 416 | int ret; |
| 417 | |
| 418 | /* Set RTC control register : Binary mode, 24hour mdoe */ |
| 419 | data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 420 | data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 421 | |
| 422 | info->rtc_24hr_mode = 1; |
| 423 | |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 424 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 425 | MAX77686_RTC_CONTROLM, data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 426 | if (ret < 0) { |
| 427 | dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", |
| 428 | __func__, ret); |
| 429 | return ret; |
| 430 | } |
| 431 | |
| 432 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 433 | return ret; |
| 434 | } |
| 435 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 436 | static int max77686_rtc_probe(struct platform_device *pdev) |
| 437 | { |
| 438 | struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); |
| 439 | struct max77686_rtc_info *info; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 440 | const struct platform_device_id *id = platform_get_device_id(pdev); |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 441 | int ret; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 442 | |
Jingoo Han | 3cebeb5 | 2013-02-21 16:45:24 -0800 | [diff] [blame] | 443 | dev_info(&pdev->dev, "%s\n", __func__); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 444 | |
Jingoo Han | 0f64f85 | 2013-04-29 16:18:30 -0700 | [diff] [blame] | 445 | info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info), |
| 446 | GFP_KERNEL); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 447 | if (!info) |
| 448 | return -ENOMEM; |
| 449 | |
| 450 | mutex_init(&info->lock); |
| 451 | info->dev = &pdev->dev; |
| 452 | info->max77686 = max77686; |
| 453 | info->rtc = max77686->rtc; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 454 | info->drv_data = (const struct max77686_rtc_driver_data *) |
| 455 | id->driver_data; |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 456 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 457 | platform_set_drvdata(pdev, info); |
| 458 | |
| 459 | ret = max77686_rtc_init_reg(info); |
| 460 | |
| 461 | if (ret < 0) { |
| 462 | dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); |
| 463 | goto err_rtc; |
| 464 | } |
| 465 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 466 | device_init_wakeup(&pdev->dev, 1); |
| 467 | |
Jingoo Han | f56950e | 2013-04-29 16:19:05 -0700 | [diff] [blame] | 468 | info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc", |
| 469 | &max77686_rtc_ops, THIS_MODULE); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 470 | |
| 471 | if (IS_ERR(info->rtc_dev)) { |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 472 | ret = PTR_ERR(info->rtc_dev); |
| 473 | dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); |
| 474 | if (ret == 0) |
| 475 | ret = -EINVAL; |
| 476 | goto err_rtc; |
| 477 | } |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 478 | |
Javier Martinez Canillas | 1745d6d | 2014-10-13 15:52:59 -0700 | [diff] [blame] | 479 | if (!max77686->rtc_irq_data) { |
| 480 | ret = -EINVAL; |
| 481 | dev_err(&pdev->dev, "%s: no RTC regmap IRQ chip\n", __func__); |
| 482 | goto err_rtc; |
| 483 | } |
| 484 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 485 | info->virq = regmap_irq_get_virq(max77686->rtc_irq_data, |
| 486 | MAX77686_RTCIRQ_RTCA1); |
| 487 | if (!info->virq) { |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 488 | ret = -ENXIO; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 489 | goto err_rtc; |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 490 | } |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 491 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 492 | ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL, |
| 493 | max77686_rtc_alarm_irq, 0, "rtc-alarm1", info); |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 494 | if (ret < 0) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 495 | dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", |
| 496 | info->virq, ret); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 497 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 498 | err_rtc: |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 499 | return ret; |
| 500 | } |
| 501 | |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 502 | #ifdef CONFIG_PM_SLEEP |
| 503 | static int max77686_rtc_suspend(struct device *dev) |
| 504 | { |
| 505 | if (device_may_wakeup(dev)) { |
| 506 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 507 | |
| 508 | return enable_irq_wake(info->virq); |
| 509 | } |
| 510 | |
| 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | static int max77686_rtc_resume(struct device *dev) |
| 515 | { |
| 516 | if (device_may_wakeup(dev)) { |
| 517 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 518 | |
| 519 | return disable_irq_wake(info->virq); |
| 520 | } |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | #endif |
| 525 | |
| 526 | static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops, |
| 527 | max77686_rtc_suspend, max77686_rtc_resume); |
| 528 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 529 | static const struct platform_device_id rtc_id[] = { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame^] | 530 | { "max77686-rtc", .driver_data = (kernel_ulong_t)&max77686_drv_data, }, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 531 | {}, |
| 532 | }; |
Javier Martinez Canillas | 2d0cca0 | 2015-05-13 17:18:01 +0200 | [diff] [blame] | 533 | MODULE_DEVICE_TABLE(platform, rtc_id); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 534 | |
| 535 | static struct platform_driver max77686_rtc_driver = { |
| 536 | .driver = { |
| 537 | .name = "max77686-rtc", |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 538 | .pm = &max77686_rtc_pm_ops, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 539 | }, |
| 540 | .probe = max77686_rtc_probe, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 541 | .id_table = rtc_id, |
| 542 | }; |
| 543 | |
Jingoo Han | 0c58ff5 | 2013-04-29 16:18:28 -0700 | [diff] [blame] | 544 | module_platform_driver(max77686_rtc_driver); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 545 | |
| 546 | MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); |
Jingoo Han | f5b1d3c | 2013-04-29 16:18:29 -0700 | [diff] [blame] | 547 | MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 548 | MODULE_LICENSE("GPL"); |