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 | |
| 44 | #define MAX77686_RTC_UPDATE_DELAY 16 |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 45 | |
| 46 | enum { |
| 47 | RTC_SEC = 0, |
| 48 | RTC_MIN, |
| 49 | RTC_HOUR, |
| 50 | RTC_WEEKDAY, |
| 51 | RTC_MONTH, |
| 52 | RTC_YEAR, |
| 53 | RTC_DATE, |
| 54 | RTC_NR_TIME |
| 55 | }; |
| 56 | |
| 57 | struct max77686_rtc_info { |
| 58 | struct device *dev; |
| 59 | struct max77686_dev *max77686; |
| 60 | struct i2c_client *rtc; |
| 61 | struct rtc_device *rtc_dev; |
| 62 | struct mutex lock; |
| 63 | |
| 64 | struct regmap *regmap; |
| 65 | |
| 66 | int virq; |
| 67 | int rtc_24hr_mode; |
| 68 | }; |
| 69 | |
| 70 | enum MAX77686_RTC_OP { |
| 71 | MAX77686_RTC_WRITE, |
| 72 | MAX77686_RTC_READ, |
| 73 | }; |
| 74 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 75 | static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, |
| 76 | int rtc_24hr_mode) |
| 77 | { |
| 78 | tm->tm_sec = data[RTC_SEC] & 0x7f; |
| 79 | tm->tm_min = data[RTC_MIN] & 0x7f; |
| 80 | if (rtc_24hr_mode) |
| 81 | tm->tm_hour = data[RTC_HOUR] & 0x1f; |
| 82 | else { |
| 83 | tm->tm_hour = data[RTC_HOUR] & 0x0f; |
| 84 | if (data[RTC_HOUR] & HOUR_PM_MASK) |
| 85 | tm->tm_hour += 12; |
| 86 | } |
| 87 | |
Javier Martinez Canillas | a20cd88 | 2014-10-13 15:53:03 -0700 | [diff] [blame] | 88 | /* Only a single bit is set in data[], so fls() would be equivalent */ |
| 89 | tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f) - 1; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 90 | tm->tm_mday = data[RTC_DATE] & 0x1f; |
| 91 | tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; |
| 92 | tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100; |
| 93 | tm->tm_yday = 0; |
| 94 | tm->tm_isdst = 0; |
| 95 | } |
| 96 | |
| 97 | static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) |
| 98 | { |
| 99 | data[RTC_SEC] = tm->tm_sec; |
| 100 | data[RTC_MIN] = tm->tm_min; |
| 101 | data[RTC_HOUR] = tm->tm_hour; |
| 102 | data[RTC_WEEKDAY] = 1 << tm->tm_wday; |
| 103 | data[RTC_DATE] = tm->tm_mday; |
| 104 | data[RTC_MONTH] = tm->tm_mon + 1; |
Sachin Kamat | cdf5f4a | 2013-07-03 15:05:55 -0700 | [diff] [blame] | 105 | data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 106 | |
| 107 | if (tm->tm_year < 100) { |
Joe Perches | a737e83 | 2015-04-16 12:46:14 -0700 | [diff] [blame] | 108 | pr_warn("RTC cannot handle the year %d. Assume it's 2000.\n", |
| 109 | 1900 + tm->tm_year); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 110 | return -EINVAL; |
| 111 | } |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static int max77686_rtc_update(struct max77686_rtc_info *info, |
| 116 | enum MAX77686_RTC_OP op) |
| 117 | { |
| 118 | int ret; |
| 119 | unsigned int data; |
| 120 | |
| 121 | if (op == MAX77686_RTC_WRITE) |
| 122 | data = 1 << RTC_UDR_SHIFT; |
| 123 | else |
| 124 | data = 1 << RTC_RBUDR_SHIFT; |
| 125 | |
| 126 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
| 127 | MAX77686_RTC_UPDATE0, data, data); |
| 128 | if (ret < 0) |
| 129 | dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", |
| 130 | __func__, ret, data); |
| 131 | else { |
| 132 | /* Minimum 16ms delay required before RTC update. */ |
| 133 | msleep(MAX77686_RTC_UPDATE_DELAY); |
| 134 | } |
| 135 | |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 140 | { |
| 141 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 142 | u8 data[RTC_NR_TIME]; |
| 143 | int ret; |
| 144 | |
| 145 | mutex_lock(&info->lock); |
| 146 | |
| 147 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 148 | if (ret < 0) |
| 149 | goto out; |
| 150 | |
| 151 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 152 | MAX77686_RTC_SEC, data, RTC_NR_TIME); |
| 153 | if (ret < 0) { |
| 154 | dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); |
| 155 | goto out; |
| 156 | } |
| 157 | |
| 158 | max77686_rtc_data_to_tm(data, tm, info->rtc_24hr_mode); |
| 159 | |
| 160 | ret = rtc_valid_tm(tm); |
| 161 | |
| 162 | out: |
| 163 | mutex_unlock(&info->lock); |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 168 | { |
| 169 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 170 | u8 data[RTC_NR_TIME]; |
| 171 | int ret; |
| 172 | |
| 173 | ret = max77686_rtc_tm_to_data(tm, data); |
| 174 | if (ret < 0) |
| 175 | return ret; |
| 176 | |
| 177 | mutex_lock(&info->lock); |
| 178 | |
| 179 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 180 | MAX77686_RTC_SEC, data, RTC_NR_TIME); |
| 181 | if (ret < 0) { |
| 182 | dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, |
| 183 | ret); |
| 184 | goto out; |
| 185 | } |
| 186 | |
| 187 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 188 | |
| 189 | out: |
| 190 | mutex_unlock(&info->lock); |
| 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 195 | { |
| 196 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 197 | u8 data[RTC_NR_TIME]; |
| 198 | unsigned int val; |
| 199 | int i, ret; |
| 200 | |
| 201 | mutex_lock(&info->lock); |
| 202 | |
| 203 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 204 | if (ret < 0) |
| 205 | goto out; |
| 206 | |
| 207 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 208 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 209 | if (ret < 0) { |
| 210 | dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", |
| 211 | __func__, __LINE__, ret); |
| 212 | goto out; |
| 213 | } |
| 214 | |
| 215 | max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); |
| 216 | |
| 217 | alrm->enabled = 0; |
| 218 | for (i = 0; i < RTC_NR_TIME; i++) { |
| 219 | if (data[i] & ALARM_ENABLE_MASK) { |
| 220 | alrm->enabled = 1; |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | alrm->pending = 0; |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 226 | ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 227 | if (ret < 0) { |
Sangjung Woo | 1748cbf | 2013-09-11 14:24:21 -0700 | [diff] [blame] | 228 | 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] | 229 | __func__, __LINE__, ret); |
| 230 | goto out; |
| 231 | } |
| 232 | |
| 233 | if (val & (1 << 4)) /* RTCA1 */ |
| 234 | alrm->pending = 1; |
| 235 | |
| 236 | out: |
| 237 | mutex_unlock(&info->lock); |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) |
| 242 | { |
| 243 | u8 data[RTC_NR_TIME]; |
| 244 | int ret, i; |
| 245 | struct rtc_time tm; |
| 246 | |
| 247 | if (!mutex_is_locked(&info->lock)) |
| 248 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 249 | |
| 250 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 251 | if (ret < 0) |
| 252 | goto out; |
| 253 | |
| 254 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 255 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 256 | if (ret < 0) { |
| 257 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 258 | __func__, ret); |
| 259 | goto out; |
| 260 | } |
| 261 | |
| 262 | max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); |
| 263 | |
| 264 | for (i = 0; i < RTC_NR_TIME; i++) |
| 265 | data[i] &= ~ALARM_ENABLE_MASK; |
| 266 | |
| 267 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 268 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 269 | if (ret < 0) { |
| 270 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 271 | __func__, ret); |
| 272 | goto out; |
| 273 | } |
| 274 | |
| 275 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 276 | out: |
| 277 | return ret; |
| 278 | } |
| 279 | |
| 280 | static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) |
| 281 | { |
| 282 | u8 data[RTC_NR_TIME]; |
| 283 | int ret; |
| 284 | struct rtc_time tm; |
| 285 | |
| 286 | if (!mutex_is_locked(&info->lock)) |
| 287 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 288 | |
| 289 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 290 | if (ret < 0) |
| 291 | goto out; |
| 292 | |
| 293 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 294 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 295 | if (ret < 0) { |
| 296 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 297 | __func__, ret); |
| 298 | goto out; |
| 299 | } |
| 300 | |
| 301 | max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); |
| 302 | |
| 303 | data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); |
| 304 | data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); |
| 305 | data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); |
| 306 | data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; |
| 307 | if (data[RTC_MONTH] & 0xf) |
| 308 | data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); |
| 309 | if (data[RTC_YEAR] & 0x7f) |
| 310 | data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); |
| 311 | if (data[RTC_DATE] & 0x1f) |
| 312 | data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); |
| 313 | |
| 314 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 315 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 316 | if (ret < 0) { |
| 317 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 318 | __func__, ret); |
| 319 | goto out; |
| 320 | } |
| 321 | |
| 322 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 323 | out: |
| 324 | return ret; |
| 325 | } |
| 326 | |
| 327 | static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 328 | { |
| 329 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 330 | u8 data[RTC_NR_TIME]; |
| 331 | int ret; |
| 332 | |
| 333 | ret = max77686_rtc_tm_to_data(&alrm->time, data); |
| 334 | if (ret < 0) |
| 335 | return ret; |
| 336 | |
| 337 | mutex_lock(&info->lock); |
| 338 | |
| 339 | ret = max77686_rtc_stop_alarm(info); |
| 340 | if (ret < 0) |
| 341 | goto out; |
| 342 | |
| 343 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 344 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 345 | |
| 346 | if (ret < 0) { |
| 347 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 348 | __func__, ret); |
| 349 | goto out; |
| 350 | } |
| 351 | |
| 352 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 353 | if (ret < 0) |
| 354 | goto out; |
| 355 | |
| 356 | if (alrm->enabled) |
| 357 | ret = max77686_rtc_start_alarm(info); |
| 358 | out: |
| 359 | mutex_unlock(&info->lock); |
| 360 | return ret; |
| 361 | } |
| 362 | |
| 363 | static int max77686_rtc_alarm_irq_enable(struct device *dev, |
| 364 | unsigned int enabled) |
| 365 | { |
| 366 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 367 | int ret; |
| 368 | |
| 369 | mutex_lock(&info->lock); |
| 370 | if (enabled) |
| 371 | ret = max77686_rtc_start_alarm(info); |
| 372 | else |
| 373 | ret = max77686_rtc_stop_alarm(info); |
| 374 | mutex_unlock(&info->lock); |
| 375 | |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) |
| 380 | { |
| 381 | struct max77686_rtc_info *info = data; |
| 382 | |
| 383 | dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); |
| 384 | |
| 385 | rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); |
| 386 | |
| 387 | return IRQ_HANDLED; |
| 388 | } |
| 389 | |
| 390 | static const struct rtc_class_ops max77686_rtc_ops = { |
| 391 | .read_time = max77686_rtc_read_time, |
| 392 | .set_time = max77686_rtc_set_time, |
| 393 | .read_alarm = max77686_rtc_read_alarm, |
| 394 | .set_alarm = max77686_rtc_set_alarm, |
| 395 | .alarm_irq_enable = max77686_rtc_alarm_irq_enable, |
| 396 | }; |
| 397 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 398 | static int max77686_rtc_init_reg(struct max77686_rtc_info *info) |
| 399 | { |
| 400 | u8 data[2]; |
| 401 | int ret; |
| 402 | |
| 403 | /* Set RTC control register : Binary mode, 24hour mdoe */ |
| 404 | data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 405 | data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 406 | |
| 407 | info->rtc_24hr_mode = 1; |
| 408 | |
| 409 | ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2); |
| 410 | if (ret < 0) { |
| 411 | dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", |
| 412 | __func__, ret); |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 417 | return ret; |
| 418 | } |
| 419 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 420 | static int max77686_rtc_probe(struct platform_device *pdev) |
| 421 | { |
| 422 | struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); |
| 423 | struct max77686_rtc_info *info; |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 424 | int ret; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 425 | |
Jingoo Han | 3cebeb5 | 2013-02-21 16:45:24 -0800 | [diff] [blame] | 426 | dev_info(&pdev->dev, "%s\n", __func__); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 427 | |
Jingoo Han | 0f64f85 | 2013-04-29 16:18:30 -0700 | [diff] [blame] | 428 | info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info), |
| 429 | GFP_KERNEL); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 430 | if (!info) |
| 431 | return -ENOMEM; |
| 432 | |
| 433 | mutex_init(&info->lock); |
| 434 | info->dev = &pdev->dev; |
| 435 | info->max77686 = max77686; |
| 436 | info->rtc = max77686->rtc; |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 437 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 438 | platform_set_drvdata(pdev, info); |
| 439 | |
| 440 | ret = max77686_rtc_init_reg(info); |
| 441 | |
| 442 | if (ret < 0) { |
| 443 | dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); |
| 444 | goto err_rtc; |
| 445 | } |
| 446 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 447 | device_init_wakeup(&pdev->dev, 1); |
| 448 | |
Jingoo Han | f56950e | 2013-04-29 16:19:05 -0700 | [diff] [blame] | 449 | info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc", |
| 450 | &max77686_rtc_ops, THIS_MODULE); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 451 | |
| 452 | if (IS_ERR(info->rtc_dev)) { |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 453 | ret = PTR_ERR(info->rtc_dev); |
| 454 | dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); |
| 455 | if (ret == 0) |
| 456 | ret = -EINVAL; |
| 457 | goto err_rtc; |
| 458 | } |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 459 | |
Javier Martinez Canillas | 1745d6d | 2014-10-13 15:52:59 -0700 | [diff] [blame] | 460 | if (!max77686->rtc_irq_data) { |
| 461 | ret = -EINVAL; |
| 462 | dev_err(&pdev->dev, "%s: no RTC regmap IRQ chip\n", __func__); |
| 463 | goto err_rtc; |
| 464 | } |
| 465 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 466 | info->virq = regmap_irq_get_virq(max77686->rtc_irq_data, |
| 467 | MAX77686_RTCIRQ_RTCA1); |
| 468 | if (!info->virq) { |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 469 | ret = -ENXIO; |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 470 | goto err_rtc; |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 471 | } |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 472 | |
Javier Martinez Canillas | 6f1c1e7 | 2014-07-04 22:24:04 +0200 | [diff] [blame] | 473 | ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL, |
| 474 | max77686_rtc_alarm_irq, 0, "rtc-alarm1", info); |
Sachin Kamat | ad81903 | 2013-04-29 16:20:12 -0700 | [diff] [blame] | 475 | if (ret < 0) |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 476 | dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", |
| 477 | info->virq, ret); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 478 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 479 | err_rtc: |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 480 | return ret; |
| 481 | } |
| 482 | |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 483 | #ifdef CONFIG_PM_SLEEP |
| 484 | static int max77686_rtc_suspend(struct device *dev) |
| 485 | { |
| 486 | if (device_may_wakeup(dev)) { |
| 487 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 488 | |
| 489 | return enable_irq_wake(info->virq); |
| 490 | } |
| 491 | |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | static int max77686_rtc_resume(struct device *dev) |
| 496 | { |
| 497 | if (device_may_wakeup(dev)) { |
| 498 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 499 | |
| 500 | return disable_irq_wake(info->virq); |
| 501 | } |
| 502 | |
| 503 | return 0; |
| 504 | } |
| 505 | #endif |
| 506 | |
| 507 | static SIMPLE_DEV_PM_OPS(max77686_rtc_pm_ops, |
| 508 | max77686_rtc_suspend, max77686_rtc_resume); |
| 509 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 510 | static const struct platform_device_id rtc_id[] = { |
| 511 | { "max77686-rtc", 0 }, |
| 512 | {}, |
| 513 | }; |
Javier Martinez Canillas | 2d0cca0 | 2015-05-13 17:18:01 +0200 | [diff] [blame] | 514 | MODULE_DEVICE_TABLE(platform, rtc_id); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 515 | |
| 516 | static struct platform_driver max77686_rtc_driver = { |
| 517 | .driver = { |
| 518 | .name = "max77686-rtc", |
Doug Anderson | e7f7fc7 | 2014-10-13 15:52:55 -0700 | [diff] [blame] | 519 | .pm = &max77686_rtc_pm_ops, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 520 | }, |
| 521 | .probe = max77686_rtc_probe, |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 522 | .id_table = rtc_id, |
| 523 | }; |
| 524 | |
Jingoo Han | 0c58ff5 | 2013-04-29 16:18:28 -0700 | [diff] [blame] | 525 | module_platform_driver(max77686_rtc_driver); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 526 | |
| 527 | MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); |
Jingoo Han | f5b1d3c | 2013-04-29 16:18:29 -0700 | [diff] [blame] | 528 | MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 529 | MODULE_LICENSE("GPL"); |