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; |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 60 | /* Registers offset to I2C addresses map */ |
| 61 | const unsigned int *map; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 62 | }; |
| 63 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 64 | struct max77686_rtc_info { |
| 65 | struct device *dev; |
| 66 | struct max77686_dev *max77686; |
| 67 | struct i2c_client *rtc; |
| 68 | struct rtc_device *rtc_dev; |
| 69 | struct mutex lock; |
| 70 | |
| 71 | struct regmap *regmap; |
| 72 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 73 | const struct max77686_rtc_driver_data *drv_data; |
| 74 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 75 | int virq; |
| 76 | int rtc_24hr_mode; |
| 77 | }; |
| 78 | |
| 79 | enum MAX77686_RTC_OP { |
| 80 | MAX77686_RTC_WRITE, |
| 81 | MAX77686_RTC_READ, |
| 82 | }; |
| 83 | |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 84 | /* These are not registers but just offsets that are mapped to addresses */ |
| 85 | enum max77686_rtc_reg_offset { |
| 86 | REG_RTC_CONTROLM = 0, |
| 87 | REG_RTC_CONTROL, |
| 88 | REG_RTC_UPDATE0, |
| 89 | REG_WTSR_SMPL_CNTL, |
| 90 | REG_RTC_SEC, |
| 91 | REG_RTC_MIN, |
| 92 | REG_RTC_HOUR, |
| 93 | REG_RTC_WEEKDAY, |
| 94 | REG_RTC_MONTH, |
| 95 | REG_RTC_YEAR, |
| 96 | REG_RTC_DATE, |
| 97 | REG_ALARM1_SEC, |
| 98 | REG_ALARM1_MIN, |
| 99 | REG_ALARM1_HOUR, |
| 100 | REG_ALARM1_WEEKDAY, |
| 101 | REG_ALARM1_MONTH, |
| 102 | REG_ALARM1_YEAR, |
| 103 | REG_ALARM1_DATE, |
| 104 | REG_ALARM2_SEC, |
| 105 | REG_ALARM2_MIN, |
| 106 | REG_ALARM2_HOUR, |
| 107 | REG_ALARM2_WEEKDAY, |
| 108 | REG_ALARM2_MONTH, |
| 109 | REG_ALARM2_YEAR, |
| 110 | REG_ALARM2_DATE, |
| 111 | REG_RTC_END, |
| 112 | }; |
| 113 | |
| 114 | /* Maps RTC registers offset to the MAX77686 register addresses */ |
| 115 | static const unsigned int max77686_map[REG_RTC_END] = { |
| 116 | [REG_RTC_CONTROLM] = MAX77686_RTC_CONTROLM, |
| 117 | [REG_RTC_CONTROL] = MAX77686_RTC_CONTROL, |
| 118 | [REG_RTC_UPDATE0] = MAX77686_RTC_UPDATE0, |
| 119 | [REG_WTSR_SMPL_CNTL] = MAX77686_WTSR_SMPL_CNTL, |
| 120 | [REG_RTC_SEC] = MAX77686_RTC_SEC, |
| 121 | [REG_RTC_MIN] = MAX77686_RTC_MIN, |
| 122 | [REG_RTC_HOUR] = MAX77686_RTC_HOUR, |
| 123 | [REG_RTC_WEEKDAY] = MAX77686_RTC_WEEKDAY, |
| 124 | [REG_RTC_MONTH] = MAX77686_RTC_MONTH, |
| 125 | [REG_RTC_YEAR] = MAX77686_RTC_YEAR, |
| 126 | [REG_RTC_DATE] = MAX77686_RTC_DATE, |
| 127 | [REG_ALARM1_SEC] = MAX77686_ALARM1_SEC, |
| 128 | [REG_ALARM1_MIN] = MAX77686_ALARM1_MIN, |
| 129 | [REG_ALARM1_HOUR] = MAX77686_ALARM1_HOUR, |
| 130 | [REG_ALARM1_WEEKDAY] = MAX77686_ALARM1_WEEKDAY, |
| 131 | [REG_ALARM1_MONTH] = MAX77686_ALARM1_MONTH, |
| 132 | [REG_ALARM1_YEAR] = MAX77686_ALARM1_YEAR, |
| 133 | [REG_ALARM1_DATE] = MAX77686_ALARM1_DATE, |
| 134 | [REG_ALARM2_SEC] = MAX77686_ALARM2_SEC, |
| 135 | [REG_ALARM2_MIN] = MAX77686_ALARM2_MIN, |
| 136 | [REG_ALARM2_HOUR] = MAX77686_ALARM2_HOUR, |
| 137 | [REG_ALARM2_WEEKDAY] = MAX77686_ALARM2_WEEKDAY, |
| 138 | [REG_ALARM2_MONTH] = MAX77686_ALARM2_MONTH, |
| 139 | [REG_ALARM2_YEAR] = MAX77686_ALARM2_YEAR, |
| 140 | [REG_ALARM2_DATE] = MAX77686_ALARM2_DATE, |
| 141 | }; |
| 142 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 143 | static const struct max77686_rtc_driver_data max77686_drv_data = { |
| 144 | .delay = 16000, |
| 145 | .mask = 0x7f, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 146 | .map = max77686_map, |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 147 | }; |
| 148 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 149 | 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] | 150 | struct max77686_rtc_info *info) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 151 | { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 152 | u8 mask = info->drv_data->mask; |
| 153 | |
| 154 | tm->tm_sec = data[RTC_SEC] & mask; |
| 155 | tm->tm_min = data[RTC_MIN] & mask; |
| 156 | if (info->rtc_24hr_mode) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 157 | tm->tm_hour = data[RTC_HOUR] & 0x1f; |
| 158 | else { |
| 159 | tm->tm_hour = data[RTC_HOUR] & 0x0f; |
| 160 | if (data[RTC_HOUR] & HOUR_PM_MASK) |
| 161 | tm->tm_hour += 12; |
| 162 | } |
| 163 | |
Javier Martinez Canillas | a20cd88 | 2014-10-13 15:53:03 -0700 | [diff] [blame] | 164 | /* 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] | 165 | tm->tm_wday = ffs(data[RTC_WEEKDAY] & mask) - 1; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 166 | tm->tm_mday = data[RTC_DATE] & 0x1f; |
| 167 | tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 168 | tm->tm_year = (data[RTC_YEAR] & mask) + 100; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 169 | tm->tm_yday = 0; |
| 170 | tm->tm_isdst = 0; |
| 171 | } |
| 172 | |
| 173 | static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) |
| 174 | { |
| 175 | data[RTC_SEC] = tm->tm_sec; |
| 176 | data[RTC_MIN] = tm->tm_min; |
| 177 | data[RTC_HOUR] = tm->tm_hour; |
| 178 | data[RTC_WEEKDAY] = 1 << tm->tm_wday; |
| 179 | data[RTC_DATE] = tm->tm_mday; |
| 180 | data[RTC_MONTH] = tm->tm_mon + 1; |
Sachin Kamat | cdf5f4a | 2013-07-03 15:05:55 -0700 | [diff] [blame] | 181 | data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 182 | |
| 183 | if (tm->tm_year < 100) { |
Joe Perches | a737e83 | 2015-04-16 12:46:14 -0700 | [diff] [blame] | 184 | pr_warn("RTC cannot handle the year %d. Assume it's 2000.\n", |
| 185 | 1900 + tm->tm_year); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 186 | return -EINVAL; |
| 187 | } |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int max77686_rtc_update(struct max77686_rtc_info *info, |
| 192 | enum MAX77686_RTC_OP op) |
| 193 | { |
| 194 | int ret; |
| 195 | unsigned int data; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 196 | unsigned long delay = info->drv_data->delay; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 197 | |
| 198 | if (op == MAX77686_RTC_WRITE) |
| 199 | data = 1 << RTC_UDR_SHIFT; |
| 200 | else |
| 201 | data = 1 << RTC_RBUDR_SHIFT; |
| 202 | |
| 203 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 204 | info->drv_data->map[REG_RTC_UPDATE0], |
| 205 | data, data); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 206 | if (ret < 0) |
| 207 | dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", |
| 208 | __func__, ret, data); |
| 209 | else { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 210 | /* Minimum delay required before RTC update. */ |
| 211 | usleep_range(delay, delay * 2); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | return ret; |
| 215 | } |
| 216 | |
| 217 | static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 218 | { |
| 219 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 220 | u8 data[RTC_NR_TIME]; |
| 221 | int ret; |
| 222 | |
| 223 | mutex_lock(&info->lock); |
| 224 | |
| 225 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 226 | if (ret < 0) |
| 227 | goto out; |
| 228 | |
| 229 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 230 | info->drv_data->map[REG_RTC_SEC], |
| 231 | data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 232 | if (ret < 0) { |
| 233 | dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); |
| 234 | goto out; |
| 235 | } |
| 236 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 237 | max77686_rtc_data_to_tm(data, tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 238 | |
| 239 | ret = rtc_valid_tm(tm); |
| 240 | |
| 241 | out: |
| 242 | mutex_unlock(&info->lock); |
| 243 | return ret; |
| 244 | } |
| 245 | |
| 246 | static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 247 | { |
| 248 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 249 | u8 data[RTC_NR_TIME]; |
| 250 | int ret; |
| 251 | |
| 252 | ret = max77686_rtc_tm_to_data(tm, data); |
| 253 | if (ret < 0) |
| 254 | return ret; |
| 255 | |
| 256 | mutex_lock(&info->lock); |
| 257 | |
| 258 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 259 | info->drv_data->map[REG_RTC_SEC], |
| 260 | data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 261 | if (ret < 0) { |
| 262 | dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, |
| 263 | ret); |
| 264 | goto out; |
| 265 | } |
| 266 | |
| 267 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 268 | |
| 269 | out: |
| 270 | mutex_unlock(&info->lock); |
| 271 | return ret; |
| 272 | } |
| 273 | |
| 274 | static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 275 | { |
| 276 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 277 | u8 data[RTC_NR_TIME]; |
| 278 | unsigned int val; |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 279 | const unsigned int *map = info->drv_data->map; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 280 | int i, ret; |
| 281 | |
| 282 | mutex_lock(&info->lock); |
| 283 | |
| 284 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 285 | if (ret < 0) |
| 286 | goto out; |
| 287 | |
| 288 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 289 | map[REG_ALARM1_SEC], data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 290 | if (ret < 0) { |
| 291 | dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", |
| 292 | __func__, __LINE__, ret); |
| 293 | goto out; |
| 294 | } |
| 295 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 296 | max77686_rtc_data_to_tm(data, &alrm->time, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 297 | |
| 298 | alrm->enabled = 0; |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 299 | for (i = 0; i < ARRAY_SIZE(data); i++) { |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 300 | if (data[i] & ALARM_ENABLE_MASK) { |
| 301 | alrm->enabled = 1; |
| 302 | break; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | alrm->pending = 0; |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 307 | ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 308 | if (ret < 0) { |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 309 | 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] | 310 | __func__, __LINE__, ret); |
| 311 | goto out; |
| 312 | } |
| 313 | |
| 314 | if (val & (1 << 4)) /* RTCA1 */ |
| 315 | alrm->pending = 1; |
| 316 | |
| 317 | out: |
| 318 | mutex_unlock(&info->lock); |
Javier Martinez Canillas | 7cdffeb | 2016-01-27 00:36:37 -0300 | [diff] [blame] | 319 | return ret; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) |
| 323 | { |
| 324 | u8 data[RTC_NR_TIME]; |
| 325 | int ret, i; |
| 326 | struct rtc_time tm; |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 327 | const unsigned int *map = info->drv_data->map; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 328 | |
| 329 | if (!mutex_is_locked(&info->lock)) |
| 330 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 331 | |
| 332 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 333 | if (ret < 0) |
| 334 | goto out; |
| 335 | |
| 336 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 337 | map[REG_ALARM1_SEC], data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 338 | if (ret < 0) { |
| 339 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 340 | __func__, ret); |
| 341 | goto out; |
| 342 | } |
| 343 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 344 | max77686_rtc_data_to_tm(data, &tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 345 | |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 346 | for (i = 0; i < ARRAY_SIZE(data); i++) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 347 | data[i] &= ~ALARM_ENABLE_MASK; |
| 348 | |
| 349 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 350 | map[REG_ALARM1_SEC], data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 351 | if (ret < 0) { |
| 352 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 353 | __func__, ret); |
| 354 | goto out; |
| 355 | } |
| 356 | |
| 357 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 358 | out: |
| 359 | return ret; |
| 360 | } |
| 361 | |
| 362 | static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) |
| 363 | { |
| 364 | u8 data[RTC_NR_TIME]; |
| 365 | int ret; |
| 366 | struct rtc_time tm; |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 367 | const unsigned int *map = info->drv_data->map; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 368 | |
| 369 | if (!mutex_is_locked(&info->lock)) |
| 370 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 371 | |
| 372 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 373 | if (ret < 0) |
| 374 | goto out; |
| 375 | |
| 376 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 377 | map[REG_ALARM1_SEC], data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 378 | if (ret < 0) { |
| 379 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 380 | __func__, ret); |
| 381 | goto out; |
| 382 | } |
| 383 | |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 384 | max77686_rtc_data_to_tm(data, &tm, info); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 385 | |
| 386 | data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); |
| 387 | data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); |
| 388 | data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); |
| 389 | data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; |
| 390 | if (data[RTC_MONTH] & 0xf) |
| 391 | data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 392 | if (data[RTC_YEAR] & info->drv_data->mask) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 393 | data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); |
| 394 | if (data[RTC_DATE] & 0x1f) |
| 395 | data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); |
| 396 | |
| 397 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 398 | map[REG_ALARM1_SEC], data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 399 | if (ret < 0) { |
| 400 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 401 | __func__, ret); |
| 402 | goto out; |
| 403 | } |
| 404 | |
| 405 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 406 | out: |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 411 | { |
| 412 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 413 | u8 data[RTC_NR_TIME]; |
| 414 | int ret; |
| 415 | |
| 416 | ret = max77686_rtc_tm_to_data(&alrm->time, data); |
| 417 | if (ret < 0) |
| 418 | return ret; |
| 419 | |
| 420 | mutex_lock(&info->lock); |
| 421 | |
| 422 | ret = max77686_rtc_stop_alarm(info); |
| 423 | if (ret < 0) |
| 424 | goto out; |
| 425 | |
| 426 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 427 | info->drv_data->map[REG_ALARM1_SEC], |
| 428 | data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 429 | |
| 430 | if (ret < 0) { |
| 431 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 432 | __func__, ret); |
| 433 | goto out; |
| 434 | } |
| 435 | |
| 436 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 437 | if (ret < 0) |
| 438 | goto out; |
| 439 | |
| 440 | if (alrm->enabled) |
| 441 | ret = max77686_rtc_start_alarm(info); |
| 442 | out: |
| 443 | mutex_unlock(&info->lock); |
| 444 | return ret; |
| 445 | } |
| 446 | |
| 447 | static int max77686_rtc_alarm_irq_enable(struct device *dev, |
| 448 | unsigned int enabled) |
| 449 | { |
| 450 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 451 | int ret; |
| 452 | |
| 453 | mutex_lock(&info->lock); |
| 454 | if (enabled) |
| 455 | ret = max77686_rtc_start_alarm(info); |
| 456 | else |
| 457 | ret = max77686_rtc_stop_alarm(info); |
| 458 | mutex_unlock(&info->lock); |
| 459 | |
| 460 | return ret; |
| 461 | } |
| 462 | |
| 463 | static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) |
| 464 | { |
| 465 | struct max77686_rtc_info *info = data; |
| 466 | |
| 467 | dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); |
| 468 | |
| 469 | rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); |
| 470 | |
| 471 | return IRQ_HANDLED; |
| 472 | } |
| 473 | |
| 474 | static const struct rtc_class_ops max77686_rtc_ops = { |
| 475 | .read_time = max77686_rtc_read_time, |
| 476 | .set_time = max77686_rtc_set_time, |
| 477 | .read_alarm = max77686_rtc_read_alarm, |
| 478 | .set_alarm = max77686_rtc_set_alarm, |
| 479 | .alarm_irq_enable = max77686_rtc_alarm_irq_enable, |
| 480 | }; |
| 481 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 482 | static int max77686_rtc_init_reg(struct max77686_rtc_info *info) |
| 483 | { |
| 484 | u8 data[2]; |
| 485 | int ret; |
| 486 | |
| 487 | /* Set RTC control register : Binary mode, 24hour mdoe */ |
| 488 | data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 489 | data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 490 | |
| 491 | info->rtc_24hr_mode = 1; |
| 492 | |
Javier Martinez Canillas | 862f945 | 2016-01-27 00:36:38 -0300 | [diff] [blame] | 493 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
Javier Martinez Canillas | 90a5698 | 2016-01-27 00:36:41 -0300 | [diff] [blame^] | 494 | info->drv_data->map[REG_RTC_CONTROLM], |
| 495 | data, ARRAY_SIZE(data)); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 496 | if (ret < 0) { |
| 497 | dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", |
| 498 | __func__, ret); |
| 499 | return ret; |
| 500 | } |
| 501 | |
| 502 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 503 | return ret; |
| 504 | } |
| 505 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 506 | static int max77686_rtc_probe(struct platform_device *pdev) |
| 507 | { |
| 508 | struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); |
| 509 | struct max77686_rtc_info *info; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 510 | const struct platform_device_id *id = platform_get_device_id(pdev); |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 511 | int ret; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 512 | |
Jingoo Han | 3cebeb5 | 2013-02-21 16:45:24 -0800 | [diff] [blame] | 513 | dev_info(&pdev->dev, "%s\n", __func__); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 514 | |
Jingoo Han | 0f64f85 | 2013-04-29 16:18:30 -0700 | [diff] [blame] | 515 | info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info), |
| 516 | GFP_KERNEL); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 517 | if (!info) |
| 518 | return -ENOMEM; |
| 519 | |
| 520 | mutex_init(&info->lock); |
| 521 | info->dev = &pdev->dev; |
| 522 | info->max77686 = max77686; |
| 523 | info->rtc = max77686->rtc; |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 524 | info->drv_data = (const struct max77686_rtc_driver_data *) |
| 525 | id->driver_data; |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 526 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 527 | platform_set_drvdata(pdev, info); |
| 528 | |
| 529 | ret = max77686_rtc_init_reg(info); |
| 530 | |
| 531 | if (ret < 0) { |
| 532 | dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); |
| 533 | goto err_rtc; |
| 534 | } |
| 535 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 536 | device_init_wakeup(&pdev->dev, 1); |
| 537 | |
Jingoo Han | f56950e | 2013-04-29 16:19:05 -0700 | [diff] [blame] | 538 | info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc", |
| 539 | &max77686_rtc_ops, THIS_MODULE); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 540 | |
| 541 | if (IS_ERR(info->rtc_dev)) { |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 542 | ret = PTR_ERR(info->rtc_dev); |
| 543 | dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); |
| 544 | if (ret == 0) |
| 545 | ret = -EINVAL; |
| 546 | goto err_rtc; |
| 547 | } |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 548 | |
Javier Martinez Canillas | 1745d6d | 2014-10-13 15:52:59 -0700 | [diff] [blame] | 549 | if (!max77686->rtc_irq_data) { |
| 550 | ret = -EINVAL; |
| 551 | dev_err(&pdev->dev, "%s: no RTC regmap IRQ chip\n", __func__); |
| 552 | goto err_rtc; |
| 553 | } |
| 554 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 555 | info->virq = regmap_irq_get_virq(max77686->rtc_irq_data, |
| 556 | MAX77686_RTCIRQ_RTCA1); |
| 557 | if (!info->virq) { |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 558 | ret = -ENXIO; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 559 | goto err_rtc; |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 560 | } |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 561 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 562 | ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL, |
| 563 | max77686_rtc_alarm_irq, 0, "rtc-alarm1", info); |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 564 | if (ret < 0) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 565 | dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", |
| 566 | info->virq, ret); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 567 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 568 | err_rtc: |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 569 | return ret; |
| 570 | } |
| 571 | |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 572 | #ifdef CONFIG_PM_SLEEP |
| 573 | static int max77686_rtc_suspend(struct device *dev) |
| 574 | { |
| 575 | if (device_may_wakeup(dev)) { |
| 576 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 577 | |
| 578 | return enable_irq_wake(info->virq); |
| 579 | } |
| 580 | |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static int max77686_rtc_resume(struct device *dev) |
| 585 | { |
| 586 | if (device_may_wakeup(dev)) { |
| 587 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 588 | |
| 589 | return disable_irq_wake(info->virq); |
| 590 | } |
| 591 | |
| 592 | return 0; |
| 593 | } |
| 594 | #endif |
| 595 | |
| 596 | static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops, |
| 597 | max77686_rtc_suspend, max77686_rtc_resume); |
| 598 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 599 | static const struct platform_device_id rtc_id[] = { |
Javier Martinez Canillas | 01ea01b | 2016-01-27 00:36:40 -0300 | [diff] [blame] | 600 | { "max77686-rtc", .driver_data = (kernel_ulong_t)&max77686_drv_data, }, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 601 | {}, |
| 602 | }; |
Javier Martinez Canillas | 2d0cca0 | 2015-05-13 17:18:01 +0200 | [diff] [blame] | 603 | MODULE_DEVICE_TABLE(platform, rtc_id); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 604 | |
| 605 | static struct platform_driver max77686_rtc_driver = { |
| 606 | .driver = { |
| 607 | .name = "max77686-rtc", |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 608 | .pm = &max77686_rtc_pm_ops, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 609 | }, |
| 610 | .probe = max77686_rtc_probe, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 611 | .id_table = rtc_id, |
| 612 | }; |
| 613 | |
Jingoo Han | 0c58ff5 | 2013-04-29 16:18:28 -0700 | [diff] [blame] | 614 | module_platform_driver(max77686_rtc_driver); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 615 | |
| 616 | MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); |
Jingoo Han | f5b1d3c | 2013-04-29 16:18:29 -0700 | [diff] [blame] | 617 | MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 618 | MODULE_LICENSE("GPL"); |