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 | |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/rtc.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/mutex.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/mfd/max77686-private.h> |
| 22 | #include <linux/irqdomain.h> |
| 23 | #include <linux/regmap.h> |
| 24 | |
| 25 | /* RTC Control Register */ |
| 26 | #define BCD_EN_SHIFT 0 |
| 27 | #define BCD_EN_MASK (1 << BCD_EN_SHIFT) |
| 28 | #define MODEL24_SHIFT 1 |
| 29 | #define MODEL24_MASK (1 << MODEL24_SHIFT) |
| 30 | /* RTC Update Register1 */ |
| 31 | #define RTC_UDR_SHIFT 0 |
| 32 | #define RTC_UDR_MASK (1 << RTC_UDR_SHIFT) |
| 33 | #define RTC_RBUDR_SHIFT 4 |
| 34 | #define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT) |
| 35 | /* WTSR and SMPL Register */ |
| 36 | #define WTSRT_SHIFT 0 |
| 37 | #define SMPLT_SHIFT 2 |
| 38 | #define WTSR_EN_SHIFT 6 |
| 39 | #define SMPL_EN_SHIFT 7 |
| 40 | #define WTSRT_MASK (3 << WTSRT_SHIFT) |
| 41 | #define SMPLT_MASK (3 << SMPLT_SHIFT) |
| 42 | #define WTSR_EN_MASK (1 << WTSR_EN_SHIFT) |
| 43 | #define SMPL_EN_MASK (1 << SMPL_EN_SHIFT) |
| 44 | /* RTC Hour register */ |
| 45 | #define HOUR_PM_SHIFT 6 |
| 46 | #define HOUR_PM_MASK (1 << HOUR_PM_SHIFT) |
| 47 | /* RTC Alarm Enable */ |
| 48 | #define ALARM_ENABLE_SHIFT 7 |
| 49 | #define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT) |
| 50 | |
| 51 | #define MAX77686_RTC_UPDATE_DELAY 16 |
| 52 | #undef MAX77686_RTC_WTSR_SMPL |
| 53 | |
| 54 | enum { |
| 55 | RTC_SEC = 0, |
| 56 | RTC_MIN, |
| 57 | RTC_HOUR, |
| 58 | RTC_WEEKDAY, |
| 59 | RTC_MONTH, |
| 60 | RTC_YEAR, |
| 61 | RTC_DATE, |
| 62 | RTC_NR_TIME |
| 63 | }; |
| 64 | |
| 65 | struct max77686_rtc_info { |
| 66 | struct device *dev; |
| 67 | struct max77686_dev *max77686; |
| 68 | struct i2c_client *rtc; |
| 69 | struct rtc_device *rtc_dev; |
| 70 | struct mutex lock; |
| 71 | |
| 72 | struct regmap *regmap; |
| 73 | |
| 74 | int virq; |
| 75 | int rtc_24hr_mode; |
| 76 | }; |
| 77 | |
| 78 | enum MAX77686_RTC_OP { |
| 79 | MAX77686_RTC_WRITE, |
| 80 | MAX77686_RTC_READ, |
| 81 | }; |
| 82 | |
| 83 | static inline int max77686_rtc_calculate_wday(u8 shifted) |
| 84 | { |
| 85 | int counter = -1; |
| 86 | while (shifted) { |
| 87 | shifted >>= 1; |
| 88 | counter++; |
| 89 | } |
| 90 | return counter; |
| 91 | } |
| 92 | |
| 93 | static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, |
| 94 | int rtc_24hr_mode) |
| 95 | { |
| 96 | tm->tm_sec = data[RTC_SEC] & 0x7f; |
| 97 | tm->tm_min = data[RTC_MIN] & 0x7f; |
| 98 | if (rtc_24hr_mode) |
| 99 | tm->tm_hour = data[RTC_HOUR] & 0x1f; |
| 100 | else { |
| 101 | tm->tm_hour = data[RTC_HOUR] & 0x0f; |
| 102 | if (data[RTC_HOUR] & HOUR_PM_MASK) |
| 103 | tm->tm_hour += 12; |
| 104 | } |
| 105 | |
| 106 | tm->tm_wday = max77686_rtc_calculate_wday(data[RTC_WEEKDAY] & 0x7f); |
| 107 | tm->tm_mday = data[RTC_DATE] & 0x1f; |
| 108 | tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; |
| 109 | tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100; |
| 110 | tm->tm_yday = 0; |
| 111 | tm->tm_isdst = 0; |
| 112 | } |
| 113 | |
| 114 | static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) |
| 115 | { |
| 116 | data[RTC_SEC] = tm->tm_sec; |
| 117 | data[RTC_MIN] = tm->tm_min; |
| 118 | data[RTC_HOUR] = tm->tm_hour; |
| 119 | data[RTC_WEEKDAY] = 1 << tm->tm_wday; |
| 120 | data[RTC_DATE] = tm->tm_mday; |
| 121 | data[RTC_MONTH] = tm->tm_mon + 1; |
| 122 | data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0 ; |
| 123 | |
| 124 | if (tm->tm_year < 100) { |
| 125 | pr_warn("%s: MAX77686 RTC cannot handle the year %d." |
| 126 | "Assume it's 2000.\n", __func__, 1900 + tm->tm_year); |
| 127 | return -EINVAL; |
| 128 | } |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int max77686_rtc_update(struct max77686_rtc_info *info, |
| 133 | enum MAX77686_RTC_OP op) |
| 134 | { |
| 135 | int ret; |
| 136 | unsigned int data; |
| 137 | |
| 138 | if (op == MAX77686_RTC_WRITE) |
| 139 | data = 1 << RTC_UDR_SHIFT; |
| 140 | else |
| 141 | data = 1 << RTC_RBUDR_SHIFT; |
| 142 | |
| 143 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
| 144 | MAX77686_RTC_UPDATE0, data, data); |
| 145 | if (ret < 0) |
| 146 | dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", |
| 147 | __func__, ret, data); |
| 148 | else { |
| 149 | /* Minimum 16ms delay required before RTC update. */ |
| 150 | msleep(MAX77686_RTC_UPDATE_DELAY); |
| 151 | } |
| 152 | |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 157 | { |
| 158 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 159 | u8 data[RTC_NR_TIME]; |
| 160 | int ret; |
| 161 | |
| 162 | mutex_lock(&info->lock); |
| 163 | |
| 164 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 165 | if (ret < 0) |
| 166 | goto out; |
| 167 | |
| 168 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 169 | MAX77686_RTC_SEC, data, RTC_NR_TIME); |
| 170 | if (ret < 0) { |
| 171 | dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); |
| 172 | goto out; |
| 173 | } |
| 174 | |
| 175 | max77686_rtc_data_to_tm(data, tm, info->rtc_24hr_mode); |
| 176 | |
| 177 | ret = rtc_valid_tm(tm); |
| 178 | |
| 179 | out: |
| 180 | mutex_unlock(&info->lock); |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 185 | { |
| 186 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 187 | u8 data[RTC_NR_TIME]; |
| 188 | int ret; |
| 189 | |
| 190 | ret = max77686_rtc_tm_to_data(tm, data); |
| 191 | if (ret < 0) |
| 192 | return ret; |
| 193 | |
| 194 | mutex_lock(&info->lock); |
| 195 | |
| 196 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 197 | MAX77686_RTC_SEC, data, RTC_NR_TIME); |
| 198 | if (ret < 0) { |
| 199 | dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, |
| 200 | ret); |
| 201 | goto out; |
| 202 | } |
| 203 | |
| 204 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 205 | |
| 206 | out: |
| 207 | mutex_unlock(&info->lock); |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 212 | { |
| 213 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 214 | u8 data[RTC_NR_TIME]; |
| 215 | unsigned int val; |
| 216 | int i, ret; |
| 217 | |
| 218 | mutex_lock(&info->lock); |
| 219 | |
| 220 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 221 | if (ret < 0) |
| 222 | goto out; |
| 223 | |
| 224 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 225 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 226 | if (ret < 0) { |
| 227 | dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", |
| 228 | __func__, __LINE__, ret); |
| 229 | goto out; |
| 230 | } |
| 231 | |
| 232 | max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); |
| 233 | |
| 234 | alrm->enabled = 0; |
| 235 | for (i = 0; i < RTC_NR_TIME; i++) { |
| 236 | if (data[i] & ALARM_ENABLE_MASK) { |
| 237 | alrm->enabled = 1; |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | alrm->pending = 0; |
| 243 | ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS1, &val); |
| 244 | if (ret < 0) { |
| 245 | dev_err(info->dev, "%s:%d fail to read status1 reg(%d)\n", |
| 246 | __func__, __LINE__, ret); |
| 247 | goto out; |
| 248 | } |
| 249 | |
| 250 | if (val & (1 << 4)) /* RTCA1 */ |
| 251 | alrm->pending = 1; |
| 252 | |
| 253 | out: |
| 254 | mutex_unlock(&info->lock); |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) |
| 259 | { |
| 260 | u8 data[RTC_NR_TIME]; |
| 261 | int ret, i; |
| 262 | struct rtc_time tm; |
| 263 | |
| 264 | if (!mutex_is_locked(&info->lock)) |
| 265 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 266 | |
| 267 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 268 | if (ret < 0) |
| 269 | goto out; |
| 270 | |
| 271 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 272 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 273 | if (ret < 0) { |
| 274 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 275 | __func__, ret); |
| 276 | goto out; |
| 277 | } |
| 278 | |
| 279 | max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); |
| 280 | |
| 281 | for (i = 0; i < RTC_NR_TIME; i++) |
| 282 | data[i] &= ~ALARM_ENABLE_MASK; |
| 283 | |
| 284 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 285 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 286 | if (ret < 0) { |
| 287 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 288 | __func__, ret); |
| 289 | goto out; |
| 290 | } |
| 291 | |
| 292 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 293 | out: |
| 294 | return ret; |
| 295 | } |
| 296 | |
| 297 | static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) |
| 298 | { |
| 299 | u8 data[RTC_NR_TIME]; |
| 300 | int ret; |
| 301 | struct rtc_time tm; |
| 302 | |
| 303 | if (!mutex_is_locked(&info->lock)) |
| 304 | dev_warn(info->dev, "%s: should have mutex locked\n", __func__); |
| 305 | |
| 306 | ret = max77686_rtc_update(info, MAX77686_RTC_READ); |
| 307 | if (ret < 0) |
| 308 | goto out; |
| 309 | |
| 310 | ret = regmap_bulk_read(info->max77686->rtc_regmap, |
| 311 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 312 | if (ret < 0) { |
| 313 | dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", |
| 314 | __func__, ret); |
| 315 | goto out; |
| 316 | } |
| 317 | |
| 318 | max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); |
| 319 | |
| 320 | data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); |
| 321 | data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); |
| 322 | data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); |
| 323 | data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; |
| 324 | if (data[RTC_MONTH] & 0xf) |
| 325 | data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); |
| 326 | if (data[RTC_YEAR] & 0x7f) |
| 327 | data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); |
| 328 | if (data[RTC_DATE] & 0x1f) |
| 329 | data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); |
| 330 | |
| 331 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 332 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 333 | if (ret < 0) { |
| 334 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 335 | __func__, ret); |
| 336 | goto out; |
| 337 | } |
| 338 | |
| 339 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 340 | out: |
| 341 | return ret; |
| 342 | } |
| 343 | |
| 344 | static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) |
| 345 | { |
| 346 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 347 | u8 data[RTC_NR_TIME]; |
| 348 | int ret; |
| 349 | |
| 350 | ret = max77686_rtc_tm_to_data(&alrm->time, data); |
| 351 | if (ret < 0) |
| 352 | return ret; |
| 353 | |
| 354 | mutex_lock(&info->lock); |
| 355 | |
| 356 | ret = max77686_rtc_stop_alarm(info); |
| 357 | if (ret < 0) |
| 358 | goto out; |
| 359 | |
| 360 | ret = regmap_bulk_write(info->max77686->rtc_regmap, |
| 361 | MAX77686_ALARM1_SEC, data, RTC_NR_TIME); |
| 362 | |
| 363 | if (ret < 0) { |
| 364 | dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", |
| 365 | __func__, ret); |
| 366 | goto out; |
| 367 | } |
| 368 | |
| 369 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 370 | if (ret < 0) |
| 371 | goto out; |
| 372 | |
| 373 | if (alrm->enabled) |
| 374 | ret = max77686_rtc_start_alarm(info); |
| 375 | out: |
| 376 | mutex_unlock(&info->lock); |
| 377 | return ret; |
| 378 | } |
| 379 | |
| 380 | static int max77686_rtc_alarm_irq_enable(struct device *dev, |
| 381 | unsigned int enabled) |
| 382 | { |
| 383 | struct max77686_rtc_info *info = dev_get_drvdata(dev); |
| 384 | int ret; |
| 385 | |
| 386 | mutex_lock(&info->lock); |
| 387 | if (enabled) |
| 388 | ret = max77686_rtc_start_alarm(info); |
| 389 | else |
| 390 | ret = max77686_rtc_stop_alarm(info); |
| 391 | mutex_unlock(&info->lock); |
| 392 | |
| 393 | return ret; |
| 394 | } |
| 395 | |
| 396 | static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) |
| 397 | { |
| 398 | struct max77686_rtc_info *info = data; |
| 399 | |
| 400 | dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); |
| 401 | |
| 402 | rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); |
| 403 | |
| 404 | return IRQ_HANDLED; |
| 405 | } |
| 406 | |
| 407 | static const struct rtc_class_ops max77686_rtc_ops = { |
| 408 | .read_time = max77686_rtc_read_time, |
| 409 | .set_time = max77686_rtc_set_time, |
| 410 | .read_alarm = max77686_rtc_read_alarm, |
| 411 | .set_alarm = max77686_rtc_set_alarm, |
| 412 | .alarm_irq_enable = max77686_rtc_alarm_irq_enable, |
| 413 | }; |
| 414 | |
| 415 | #ifdef MAX77686_RTC_WTSR_SMPL |
| 416 | static void max77686_rtc_enable_wtsr(struct max77686_rtc_info *info, bool enable) |
| 417 | { |
| 418 | int ret; |
| 419 | unsigned int val, mask; |
| 420 | |
| 421 | if (enable) |
| 422 | val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT); |
| 423 | else |
| 424 | val = 0; |
| 425 | |
| 426 | mask = WTSR_EN_MASK | WTSRT_MASK; |
| 427 | |
| 428 | dev_info(info->dev, "%s: %s WTSR\n", __func__, |
| 429 | enable ? "enable" : "disable"); |
| 430 | |
| 431 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
| 432 | MAX77686_WTSR_SMPL_CNTL, mask, val); |
| 433 | if (ret < 0) { |
| 434 | dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", |
| 435 | __func__, ret); |
| 436 | return; |
| 437 | } |
| 438 | |
| 439 | max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 440 | } |
| 441 | |
| 442 | static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable) |
| 443 | { |
| 444 | int ret; |
| 445 | unsigned int val, mask; |
| 446 | |
| 447 | if (enable) |
| 448 | val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT); |
| 449 | else |
| 450 | val = 0; |
| 451 | |
| 452 | mask = SMPL_EN_MASK | SMPLT_MASK; |
| 453 | |
| 454 | dev_info(info->dev, "%s: %s SMPL\n", __func__, |
| 455 | enable ? "enable" : "disable"); |
| 456 | |
| 457 | ret = regmap_update_bits(info->max77686->rtc_regmap, |
| 458 | MAX77686_WTSR_SMPL_CNTL, mask, val); |
| 459 | if (ret < 0) { |
| 460 | dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", |
| 461 | __func__, ret); |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 466 | |
| 467 | val = 0; |
| 468 | regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); |
| 469 | pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val); |
| 470 | } |
| 471 | #endif /* MAX77686_RTC_WTSR_SMPL */ |
| 472 | |
| 473 | static int max77686_rtc_init_reg(struct max77686_rtc_info *info) |
| 474 | { |
| 475 | u8 data[2]; |
| 476 | int ret; |
| 477 | |
| 478 | /* Set RTC control register : Binary mode, 24hour mdoe */ |
| 479 | data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 480 | data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); |
| 481 | |
| 482 | info->rtc_24hr_mode = 1; |
| 483 | |
| 484 | ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2); |
| 485 | if (ret < 0) { |
| 486 | dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", |
| 487 | __func__, ret); |
| 488 | return ret; |
| 489 | } |
| 490 | |
| 491 | ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); |
| 492 | return ret; |
| 493 | } |
| 494 | |
| 495 | static struct regmap_config max77686_rtc_regmap_config = { |
| 496 | .reg_bits = 8, |
| 497 | .val_bits = 8, |
| 498 | }; |
| 499 | |
| 500 | static int max77686_rtc_probe(struct platform_device *pdev) |
| 501 | { |
| 502 | struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); |
| 503 | struct max77686_rtc_info *info; |
| 504 | int ret, virq; |
| 505 | |
Jingoo Han | 3cebeb5 | 2013-02-21 16:45:24 -0800 | [diff] [blame] | 506 | dev_info(&pdev->dev, "%s\n", __func__); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 507 | |
Jingoo Han | 0f64f85 | 2013-04-29 16:18:30 -0700 | [diff] [blame^] | 508 | info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info), |
| 509 | GFP_KERNEL); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 510 | if (!info) |
| 511 | return -ENOMEM; |
| 512 | |
| 513 | mutex_init(&info->lock); |
| 514 | info->dev = &pdev->dev; |
| 515 | info->max77686 = max77686; |
| 516 | info->rtc = max77686->rtc; |
| 517 | info->max77686->rtc_regmap = regmap_init_i2c(info->max77686->rtc, |
| 518 | &max77686_rtc_regmap_config); |
| 519 | if (IS_ERR(info->max77686->rtc_regmap)) { |
| 520 | ret = PTR_ERR(info->max77686->rtc_regmap); |
| 521 | dev_err(info->max77686->dev, "Failed to allocate register map: %d\n", |
| 522 | ret); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 523 | return ret; |
| 524 | } |
| 525 | platform_set_drvdata(pdev, info); |
| 526 | |
| 527 | ret = max77686_rtc_init_reg(info); |
| 528 | |
| 529 | if (ret < 0) { |
| 530 | dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); |
| 531 | goto err_rtc; |
| 532 | } |
| 533 | |
| 534 | #ifdef MAX77686_RTC_WTSR_SMPL |
| 535 | max77686_rtc_enable_wtsr(info, true); |
| 536 | max77686_rtc_enable_smpl(info, true); |
| 537 | #endif |
| 538 | |
| 539 | device_init_wakeup(&pdev->dev, 1); |
| 540 | |
| 541 | info->rtc_dev = rtc_device_register("max77686-rtc", &pdev->dev, |
| 542 | &max77686_rtc_ops, THIS_MODULE); |
| 543 | |
| 544 | if (IS_ERR(info->rtc_dev)) { |
Jingoo Han | 3cebeb5 | 2013-02-21 16:45:24 -0800 | [diff] [blame] | 545 | dev_info(&pdev->dev, "%s: fail\n", __func__); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 546 | |
| 547 | ret = PTR_ERR(info->rtc_dev); |
| 548 | dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); |
| 549 | if (ret == 0) |
| 550 | ret = -EINVAL; |
| 551 | goto err_rtc; |
| 552 | } |
| 553 | virq = irq_create_mapping(max77686->irq_domain, MAX77686_RTCIRQ_RTCA1); |
| 554 | if (!virq) |
| 555 | goto err_rtc; |
| 556 | info->virq = virq; |
| 557 | |
| 558 | ret = request_threaded_irq(virq, NULL, max77686_rtc_alarm_irq, 0, |
| 559 | "rtc-alarm0", info); |
| 560 | if (ret < 0) { |
| 561 | dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", |
| 562 | info->virq, ret); |
| 563 | goto err_rtc; |
| 564 | } |
| 565 | |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 566 | err_rtc: |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 567 | return ret; |
| 568 | } |
| 569 | |
| 570 | static int max77686_rtc_remove(struct platform_device *pdev) |
| 571 | { |
| 572 | struct max77686_rtc_info *info = platform_get_drvdata(pdev); |
| 573 | |
| 574 | if (info) { |
| 575 | free_irq(info->virq, info); |
| 576 | rtc_device_unregister(info->rtc_dev); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | static void max77686_rtc_shutdown(struct platform_device *pdev) |
| 583 | { |
| 584 | #ifdef MAX77686_RTC_WTSR_SMPL |
| 585 | struct max77686_rtc_info *info = platform_get_drvdata(pdev); |
| 586 | int i; |
| 587 | u8 val = 0; |
| 588 | |
| 589 | for (i = 0; i < 3; i++) { |
| 590 | max77686_rtc_enable_wtsr(info, false); |
| 591 | regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); |
| 592 | pr_info("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); |
| 593 | if (val & WTSR_EN_MASK) |
| 594 | pr_emerg("%s: fail to disable WTSR\n", __func__); |
| 595 | else { |
| 596 | pr_info("%s: success to disable WTSR\n", __func__); |
| 597 | break; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /* Disable SMPL when power off */ |
| 602 | max77686_rtc_enable_smpl(info, false); |
| 603 | #endif /* MAX77686_RTC_WTSR_SMPL */ |
| 604 | } |
| 605 | |
| 606 | static const struct platform_device_id rtc_id[] = { |
| 607 | { "max77686-rtc", 0 }, |
| 608 | {}, |
| 609 | }; |
| 610 | |
| 611 | static struct platform_driver max77686_rtc_driver = { |
| 612 | .driver = { |
| 613 | .name = "max77686-rtc", |
| 614 | .owner = THIS_MODULE, |
| 615 | }, |
| 616 | .probe = max77686_rtc_probe, |
| 617 | .remove = max77686_rtc_remove, |
| 618 | .shutdown = max77686_rtc_shutdown, |
| 619 | .id_table = rtc_id, |
| 620 | }; |
| 621 | |
Jingoo Han | 0c58ff5 | 2013-04-29 16:18:28 -0700 | [diff] [blame] | 622 | module_platform_driver(max77686_rtc_driver); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 623 | |
| 624 | MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); |
Jingoo Han | f5b1d3c | 2013-04-29 16:18:29 -0700 | [diff] [blame] | 625 | MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>"); |
Jonghwa Lee | fca1dd0 | 2013-02-21 16:44:26 -0800 | [diff] [blame] | 626 | MODULE_LICENSE("GPL"); |