Anirudh Ghayal | 9a9a54a | 2011-07-25 17:13:33 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/rtc.h> |
| 16 | #include <linux/pm.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | |
| 20 | #include <linux/mfd/pm8xxx/core.h> |
| 21 | #include <linux/mfd/pm8xxx/rtc.h> |
| 22 | |
| 23 | |
| 24 | /* RTC Register offsets from RTC CTRL REG */ |
| 25 | #define PM8XXX_ALARM_CTRL_OFFSET 0x01 |
| 26 | #define PM8XXX_RTC_WRITE_OFFSET 0x02 |
| 27 | #define PM8XXX_RTC_READ_OFFSET 0x06 |
| 28 | #define PM8XXX_ALARM_RW_OFFSET 0x0A |
| 29 | |
| 30 | /* RTC_CTRL register bit fields */ |
| 31 | #define PM8xxx_RTC_ENABLE BIT(7) |
| 32 | #define PM8xxx_RTC_ALARM_ENABLE BIT(1) |
| 33 | #define PM8xxx_RTC_ALARM_CLEAR BIT(0) |
| 34 | |
| 35 | #define NUM_8_BIT_RTC_REGS 0x4 |
| 36 | |
| 37 | /** |
| 38 | * struct pm8xxx_rtc - rtc driver internal structure |
| 39 | * @rtc: rtc device for this driver. |
| 40 | * @rtc_alarm_irq: rtc alarm irq number. |
| 41 | * @rtc_base: address of rtc control register. |
| 42 | * @rtc_read_base: base address of read registers. |
| 43 | * @rtc_write_base: base address of write registers. |
| 44 | * @alarm_rw_base: base address of alarm registers. |
| 45 | * @ctrl_reg: rtc control register. |
| 46 | * @rtc_dev: device structure. |
| 47 | * @ctrl_reg_lock: spinlock protecting access to ctrl_reg. |
| 48 | */ |
| 49 | struct pm8xxx_rtc { |
| 50 | struct rtc_device *rtc; |
| 51 | int rtc_alarm_irq; |
| 52 | int rtc_base; |
| 53 | int rtc_read_base; |
| 54 | int rtc_write_base; |
| 55 | int alarm_rw_base; |
| 56 | u8 ctrl_reg; |
| 57 | struct device *rtc_dev; |
| 58 | spinlock_t ctrl_reg_lock; |
| 59 | }; |
| 60 | |
| 61 | /* |
| 62 | * The RTC registers need to be read/written one byte at a time. This is a |
| 63 | * hardware limitation. |
| 64 | */ |
| 65 | static int pm8xxx_read_wrapper(struct pm8xxx_rtc *rtc_dd, u8 *rtc_val, |
| 66 | int base, int count) |
| 67 | { |
| 68 | int i, rc; |
| 69 | struct device *parent = rtc_dd->rtc_dev->parent; |
| 70 | |
| 71 | for (i = 0; i < count; i++) { |
| 72 | rc = pm8xxx_readb(parent, base + i, &rtc_val[i]); |
| 73 | if (rc < 0) { |
| 74 | dev_err(rtc_dd->rtc_dev, "PMIC read failed\n"); |
| 75 | return rc; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static int pm8xxx_write_wrapper(struct pm8xxx_rtc *rtc_dd, u8 *rtc_val, |
| 83 | int base, int count) |
| 84 | { |
| 85 | int i, rc; |
| 86 | struct device *parent = rtc_dd->rtc_dev->parent; |
| 87 | |
| 88 | for (i = 0; i < count; i++) { |
| 89 | rc = pm8xxx_writeb(parent, base + i, rtc_val[i]); |
| 90 | if (rc < 0) { |
| 91 | dev_err(rtc_dd->rtc_dev, "PMIC write failed\n"); |
| 92 | return rc; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Steps to write the RTC registers. |
| 101 | * 1. Disable alarm if enabled. |
| 102 | * 2. Write 0x00 to LSB. |
| 103 | * 3. Write Byte[1], Byte[2], Byte[3] then Byte[0]. |
| 104 | * 4. Enable alarm if disabled in step 1. |
| 105 | */ |
| 106 | static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 107 | { |
| 108 | int rc, i; |
| 109 | unsigned long secs, irq_flags; |
| 110 | u8 value[NUM_8_BIT_RTC_REGS], reg = 0, alarm_enabled = 0, ctrl_reg; |
| 111 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 112 | |
| 113 | rtc_tm_to_time(tm, &secs); |
| 114 | |
| 115 | for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { |
| 116 | value[i] = secs & 0xFF; |
| 117 | secs >>= 8; |
| 118 | } |
| 119 | |
| 120 | dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); |
| 121 | |
| 122 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 123 | ctrl_reg = rtc_dd->ctrl_reg; |
| 124 | |
| 125 | if (ctrl_reg & PM8xxx_RTC_ALARM_ENABLE) { |
| 126 | alarm_enabled = 1; |
| 127 | ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; |
| 128 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, |
| 129 | 1); |
| 130 | if (rc < 0) { |
| 131 | dev_err(dev, "Write to RTC control register " |
| 132 | "failed\n"); |
| 133 | goto rtc_rw_fail; |
| 134 | } |
| 135 | rtc_dd->ctrl_reg = ctrl_reg; |
| 136 | } else |
| 137 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 138 | |
| 139 | /* Write 0 to Byte[0] */ |
| 140 | reg = 0; |
| 141 | rc = pm8xxx_write_wrapper(rtc_dd, ®, rtc_dd->rtc_write_base, 1); |
| 142 | if (rc < 0) { |
| 143 | dev_err(dev, "Write to RTC write data register failed\n"); |
| 144 | goto rtc_rw_fail; |
| 145 | } |
| 146 | |
| 147 | /* Write Byte[1], Byte[2], Byte[3] */ |
| 148 | rc = pm8xxx_write_wrapper(rtc_dd, value + 1, |
| 149 | rtc_dd->rtc_write_base + 1, 3); |
| 150 | if (rc < 0) { |
| 151 | dev_err(dev, "Write to RTC write data register failed\n"); |
| 152 | goto rtc_rw_fail; |
| 153 | } |
| 154 | |
| 155 | /* Write Byte[0] */ |
| 156 | rc = pm8xxx_write_wrapper(rtc_dd, value, rtc_dd->rtc_write_base, 1); |
| 157 | if (rc < 0) { |
| 158 | dev_err(dev, "Write to RTC write data register failed\n"); |
| 159 | goto rtc_rw_fail; |
| 160 | } |
| 161 | |
| 162 | if (alarm_enabled) { |
| 163 | ctrl_reg |= PM8xxx_RTC_ALARM_ENABLE; |
| 164 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, |
| 165 | 1); |
| 166 | if (rc < 0) { |
| 167 | dev_err(dev, "Write to RTC control register " |
| 168 | "failed\n"); |
| 169 | goto rtc_rw_fail; |
| 170 | } |
| 171 | rtc_dd->ctrl_reg = ctrl_reg; |
| 172 | } |
| 173 | |
| 174 | rtc_rw_fail: |
| 175 | if (alarm_enabled) |
| 176 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 177 | |
| 178 | return rc; |
| 179 | } |
| 180 | |
| 181 | static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 182 | { |
| 183 | int rc; |
| 184 | u8 value[NUM_8_BIT_RTC_REGS], reg; |
| 185 | unsigned long secs; |
| 186 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 187 | |
| 188 | rc = pm8xxx_read_wrapper(rtc_dd, value, rtc_dd->rtc_read_base, |
| 189 | NUM_8_BIT_RTC_REGS); |
| 190 | if (rc < 0) { |
| 191 | dev_err(dev, "RTC read data register failed\n"); |
| 192 | return rc; |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Read the LSB again and check if there has been a carry over. |
| 197 | * If there is, redo the read operation. |
| 198 | */ |
| 199 | rc = pm8xxx_read_wrapper(rtc_dd, ®, rtc_dd->rtc_read_base, 1); |
| 200 | if (rc < 0) { |
| 201 | dev_err(dev, "RTC read data register failed\n"); |
| 202 | return rc; |
| 203 | } |
| 204 | |
| 205 | if (unlikely(reg < value[0])) { |
| 206 | rc = pm8xxx_read_wrapper(rtc_dd, value, |
| 207 | rtc_dd->rtc_read_base, NUM_8_BIT_RTC_REGS); |
| 208 | if (rc < 0) { |
| 209 | dev_err(dev, "RTC read data register failed\n"); |
| 210 | return rc; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); |
| 215 | |
| 216 | rtc_time_to_tm(secs, tm); |
| 217 | |
| 218 | rc = rtc_valid_tm(tm); |
| 219 | if (rc < 0) { |
| 220 | dev_err(dev, "Invalid time read from RTC\n"); |
| 221 | return rc; |
| 222 | } |
| 223 | |
| 224 | dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n", |
| 225 | secs, tm->tm_hour, tm->tm_min, tm->tm_sec, |
| 226 | tm->tm_mday, tm->tm_mon, tm->tm_year); |
| 227 | |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
| 232 | { |
| 233 | int rc, i; |
| 234 | u8 value[NUM_8_BIT_RTC_REGS], ctrl_reg; |
| 235 | unsigned long secs, irq_flags; |
| 236 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 237 | |
| 238 | rtc_tm_to_time(&alarm->time, &secs); |
| 239 | |
| 240 | for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { |
| 241 | value[i] = secs & 0xFF; |
| 242 | secs >>= 8; |
| 243 | } |
| 244 | |
| 245 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 246 | |
| 247 | rc = pm8xxx_write_wrapper(rtc_dd, value, rtc_dd->alarm_rw_base, |
| 248 | NUM_8_BIT_RTC_REGS); |
| 249 | if (rc < 0) { |
| 250 | dev_err(dev, "Write to RTC ALARM register failed\n"); |
| 251 | goto rtc_rw_fail; |
| 252 | } |
| 253 | |
| 254 | ctrl_reg = rtc_dd->ctrl_reg; |
| 255 | ctrl_reg = alarm->enabled ? (ctrl_reg | PM8xxx_RTC_ALARM_ENABLE) : |
| 256 | (ctrl_reg & ~PM8xxx_RTC_ALARM_ENABLE); |
| 257 | |
| 258 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); |
| 259 | if (rc < 0) { |
| 260 | dev_err(dev, "Write to RTC control register failed\n"); |
| 261 | goto rtc_rw_fail; |
| 262 | } |
| 263 | |
| 264 | rtc_dd->ctrl_reg = ctrl_reg; |
| 265 | |
| 266 | dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", |
| 267 | alarm->time.tm_hour, alarm->time.tm_min, |
| 268 | alarm->time.tm_sec, alarm->time.tm_mday, |
| 269 | alarm->time.tm_mon, alarm->time.tm_year); |
| 270 | rtc_rw_fail: |
| 271 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 272 | return rc; |
| 273 | } |
| 274 | |
| 275 | static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
| 276 | { |
| 277 | int rc; |
| 278 | u8 value[NUM_8_BIT_RTC_REGS]; |
| 279 | unsigned long secs; |
| 280 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 281 | |
| 282 | rc = pm8xxx_read_wrapper(rtc_dd, value, rtc_dd->alarm_rw_base, |
| 283 | NUM_8_BIT_RTC_REGS); |
| 284 | if (rc < 0) { |
| 285 | dev_err(dev, "RTC alarm time read failed\n"); |
| 286 | return rc; |
| 287 | } |
| 288 | |
| 289 | secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); |
| 290 | |
| 291 | rtc_time_to_tm(secs, &alarm->time); |
| 292 | |
| 293 | rc = rtc_valid_tm(&alarm->time); |
| 294 | if (rc < 0) { |
| 295 | dev_err(dev, "Invalid alarm time read from RTC\n"); |
| 296 | return rc; |
| 297 | } |
| 298 | |
| 299 | dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", |
| 300 | alarm->time.tm_hour, alarm->time.tm_min, |
| 301 | alarm->time.tm_sec, alarm->time.tm_mday, |
| 302 | alarm->time.tm_mon, alarm->time.tm_year); |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) |
| 308 | { |
| 309 | int rc; |
| 310 | unsigned long irq_flags; |
| 311 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 312 | u8 ctrl_reg; |
| 313 | |
| 314 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 315 | ctrl_reg = rtc_dd->ctrl_reg; |
| 316 | ctrl_reg = (enable) ? (ctrl_reg | PM8xxx_RTC_ALARM_ENABLE) : |
| 317 | (ctrl_reg & ~PM8xxx_RTC_ALARM_ENABLE); |
| 318 | |
| 319 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); |
| 320 | if (rc < 0) { |
| 321 | dev_err(dev, "Write to RTC control register failed\n"); |
| 322 | goto rtc_rw_fail; |
| 323 | } |
| 324 | |
| 325 | rtc_dd->ctrl_reg = ctrl_reg; |
| 326 | |
| 327 | rtc_rw_fail: |
| 328 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 329 | return rc; |
| 330 | } |
| 331 | |
| 332 | static struct rtc_class_ops pm8xxx_rtc_ops = { |
| 333 | .read_time = pm8xxx_rtc_read_time, |
| 334 | .set_alarm = pm8xxx_rtc_set_alarm, |
| 335 | .read_alarm = pm8xxx_rtc_read_alarm, |
| 336 | .alarm_irq_enable = pm8xxx_rtc_alarm_irq_enable, |
| 337 | }; |
| 338 | |
| 339 | static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) |
| 340 | { |
| 341 | struct pm8xxx_rtc *rtc_dd = dev_id; |
| 342 | u8 ctrl_reg; |
| 343 | int rc; |
| 344 | unsigned long irq_flags; |
| 345 | |
| 346 | rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); |
| 347 | |
| 348 | spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 349 | |
| 350 | /* Clear the alarm enable bit */ |
| 351 | ctrl_reg = rtc_dd->ctrl_reg; |
| 352 | ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; |
| 353 | |
| 354 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); |
| 355 | if (rc < 0) { |
| 356 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 357 | dev_err(rtc_dd->rtc_dev, "Write to RTC control register " |
| 358 | "failed\n"); |
| 359 | goto rtc_alarm_handled; |
| 360 | } |
| 361 | |
| 362 | rtc_dd->ctrl_reg = ctrl_reg; |
| 363 | spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); |
| 364 | |
| 365 | /* Clear RTC alarm register */ |
| 366 | rc = pm8xxx_read_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base + |
| 367 | PM8XXX_ALARM_CTRL_OFFSET, 1); |
| 368 | if (rc < 0) { |
| 369 | dev_err(rtc_dd->rtc_dev, "RTC Alarm control register read " |
| 370 | "failed\n"); |
| 371 | goto rtc_alarm_handled; |
| 372 | } |
| 373 | |
| 374 | ctrl_reg &= ~PM8xxx_RTC_ALARM_CLEAR; |
| 375 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base + |
| 376 | PM8XXX_ALARM_CTRL_OFFSET, 1); |
| 377 | if (rc < 0) |
| 378 | dev_err(rtc_dd->rtc_dev, "Write to RTC Alarm control register" |
| 379 | " failed\n"); |
| 380 | |
| 381 | rtc_alarm_handled: |
| 382 | return IRQ_HANDLED; |
| 383 | } |
| 384 | |
| 385 | static int __devinit pm8xxx_rtc_probe(struct platform_device *pdev) |
| 386 | { |
| 387 | int rc; |
| 388 | u8 ctrl_reg; |
| 389 | bool rtc_write_enable = false; |
| 390 | struct pm8xxx_rtc *rtc_dd; |
| 391 | struct resource *rtc_resource; |
| 392 | const struct pm8xxx_rtc_platform_data *pdata = |
| 393 | dev_get_platdata(&pdev->dev); |
| 394 | |
| 395 | if (pdata != NULL) |
| 396 | rtc_write_enable = pdata->rtc_write_enable; |
| 397 | |
| 398 | rtc_dd = kzalloc(sizeof(*rtc_dd), GFP_KERNEL); |
| 399 | if (rtc_dd == NULL) { |
| 400 | dev_err(&pdev->dev, "Unable to allocate memory!\n"); |
| 401 | return -ENOMEM; |
| 402 | } |
| 403 | |
| 404 | /* Initialise spinlock to protect RTC control register */ |
| 405 | spin_lock_init(&rtc_dd->ctrl_reg_lock); |
| 406 | |
| 407 | rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0); |
| 408 | if (rtc_dd->rtc_alarm_irq < 0) { |
| 409 | dev_err(&pdev->dev, "Alarm IRQ resource absent!\n"); |
| 410 | rc = -ENXIO; |
| 411 | goto fail_rtc_enable; |
| 412 | } |
| 413 | |
| 414 | rtc_resource = platform_get_resource_byname(pdev, IORESOURCE_IO, |
| 415 | "pmic_rtc_base"); |
| 416 | if (!(rtc_resource && rtc_resource->start)) { |
| 417 | dev_err(&pdev->dev, "RTC IO resource absent!\n"); |
| 418 | rc = -ENXIO; |
| 419 | goto fail_rtc_enable; |
| 420 | } |
| 421 | |
| 422 | rtc_dd->rtc_base = rtc_resource->start; |
| 423 | |
| 424 | /* Setup RTC register addresses */ |
| 425 | rtc_dd->rtc_write_base = rtc_dd->rtc_base + PM8XXX_RTC_WRITE_OFFSET; |
| 426 | rtc_dd->rtc_read_base = rtc_dd->rtc_base + PM8XXX_RTC_READ_OFFSET; |
| 427 | rtc_dd->alarm_rw_base = rtc_dd->rtc_base + PM8XXX_ALARM_RW_OFFSET; |
| 428 | |
| 429 | rtc_dd->rtc_dev = &pdev->dev; |
| 430 | |
| 431 | /* Check if the RTC is on, else turn it on */ |
| 432 | rc = pm8xxx_read_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); |
| 433 | if (rc < 0) { |
| 434 | dev_err(&pdev->dev, "RTC control register read failed!\n"); |
| 435 | goto fail_rtc_enable; |
| 436 | } |
| 437 | |
| 438 | if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) { |
| 439 | ctrl_reg |= PM8xxx_RTC_ENABLE; |
| 440 | rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, |
| 441 | 1); |
| 442 | if (rc < 0) { |
| 443 | dev_err(&pdev->dev, "Write to RTC control register " |
| 444 | "failed\n"); |
| 445 | goto fail_rtc_enable; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | rtc_dd->ctrl_reg = ctrl_reg; |
| 450 | if (rtc_write_enable == true) |
| 451 | pm8xxx_rtc_ops.set_time = pm8xxx_rtc_set_time; |
| 452 | |
| 453 | platform_set_drvdata(pdev, rtc_dd); |
| 454 | |
| 455 | /* Register the RTC device */ |
| 456 | rtc_dd->rtc = rtc_device_register("pm8xxx_rtc", &pdev->dev, |
| 457 | &pm8xxx_rtc_ops, THIS_MODULE); |
| 458 | if (IS_ERR(rtc_dd->rtc)) { |
| 459 | dev_err(&pdev->dev, "%s: RTC registration failed (%ld)\n", |
| 460 | __func__, PTR_ERR(rtc_dd->rtc)); |
| 461 | rc = PTR_ERR(rtc_dd->rtc); |
| 462 | goto fail_rtc_enable; |
| 463 | } |
| 464 | |
| 465 | /* Request the alarm IRQ */ |
| 466 | rc = request_any_context_irq(rtc_dd->rtc_alarm_irq, |
| 467 | pm8xxx_alarm_trigger, IRQF_TRIGGER_RISING, |
| 468 | "pm8xxx_rtc_alarm", rtc_dd); |
| 469 | if (rc < 0) { |
| 470 | dev_err(&pdev->dev, "Request IRQ failed (%d)\n", rc); |
| 471 | goto fail_req_irq; |
| 472 | } |
| 473 | |
| 474 | device_init_wakeup(&pdev->dev, 1); |
| 475 | |
| 476 | dev_dbg(&pdev->dev, "Probe success !!\n"); |
| 477 | |
| 478 | return 0; |
| 479 | |
| 480 | fail_req_irq: |
| 481 | rtc_device_unregister(rtc_dd->rtc); |
| 482 | fail_rtc_enable: |
| 483 | platform_set_drvdata(pdev, NULL); |
| 484 | kfree(rtc_dd); |
| 485 | return rc; |
| 486 | } |
| 487 | |
| 488 | static int __devexit pm8xxx_rtc_remove(struct platform_device *pdev) |
| 489 | { |
| 490 | struct pm8xxx_rtc *rtc_dd = platform_get_drvdata(pdev); |
| 491 | |
| 492 | device_init_wakeup(&pdev->dev, 0); |
| 493 | free_irq(rtc_dd->rtc_alarm_irq, rtc_dd); |
| 494 | rtc_device_unregister(rtc_dd->rtc); |
| 495 | platform_set_drvdata(pdev, NULL); |
| 496 | kfree(rtc_dd); |
| 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | #ifdef CONFIG_PM_SLEEP |
| 502 | static int pm8xxx_rtc_resume(struct device *dev) |
| 503 | { |
| 504 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 505 | |
| 506 | if (device_may_wakeup(dev)) |
| 507 | disable_irq_wake(rtc_dd->rtc_alarm_irq); |
| 508 | |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | static int pm8xxx_rtc_suspend(struct device *dev) |
| 513 | { |
| 514 | struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); |
| 515 | |
| 516 | if (device_may_wakeup(dev)) |
| 517 | enable_irq_wake(rtc_dd->rtc_alarm_irq); |
| 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | #endif |
| 522 | |
| 523 | SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, pm8xxx_rtc_suspend, pm8xxx_rtc_resume); |
| 524 | |
| 525 | static struct platform_driver pm8xxx_rtc_driver = { |
| 526 | .probe = pm8xxx_rtc_probe, |
| 527 | .remove = __devexit_p(pm8xxx_rtc_remove), |
| 528 | .driver = { |
| 529 | .name = PM8XXX_RTC_DEV_NAME, |
| 530 | .owner = THIS_MODULE, |
| 531 | .pm = &pm8xxx_rtc_pm_ops, |
| 532 | }, |
| 533 | }; |
| 534 | |
Axel Lin | 0c4eae6 | 2012-01-10 15:10:48 -0800 | [diff] [blame^] | 535 | module_platform_driver(pm8xxx_rtc_driver); |
Anirudh Ghayal | 9a9a54a | 2011-07-25 17:13:33 -0700 | [diff] [blame] | 536 | |
| 537 | MODULE_ALIAS("platform:rtc-pm8xxx"); |
| 538 | MODULE_DESCRIPTION("PMIC8xxx RTC driver"); |
| 539 | MODULE_LICENSE("GPL v2"); |
| 540 | MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>"); |