Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1 | /* |
| 2 | * RPR-0521 ROHM Ambient Light and Proximity Sensor |
| 3 | * |
| 4 | * Copyright (c) 2015, Intel Corporation. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of version 2 of |
| 7 | * the GNU General Public License. See the file COPYING in the main |
| 8 | * directory of this archive for more details. |
| 9 | * |
| 10 | * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38). |
| 11 | * |
| 12 | * TODO: illuminance channel, PM support, buffer |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/i2c.h> |
| 18 | #include <linux/regmap.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/acpi.h> |
| 21 | |
| 22 | #include <linux/iio/iio.h> |
| 23 | #include <linux/iio/sysfs.h> |
| 24 | #include <linux/pm_runtime.h> |
| 25 | |
| 26 | #define RPR0521_REG_SYSTEM_CTRL 0x40 |
| 27 | #define RPR0521_REG_MODE_CTRL 0x41 |
| 28 | #define RPR0521_REG_ALS_CTRL 0x42 |
| 29 | #define RPR0521_REG_PXS_CTRL 0x43 |
| 30 | #define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */ |
| 31 | #define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */ |
| 32 | #define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */ |
| 33 | #define RPR0521_REG_ID 0x92 |
| 34 | |
| 35 | #define RPR0521_MODE_ALS_MASK BIT(7) |
| 36 | #define RPR0521_MODE_PXS_MASK BIT(6) |
| 37 | #define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0) |
| 38 | #define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4) |
| 39 | #define RPR0521_ALS_DATA0_GAIN_SHIFT 4 |
| 40 | #define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2) |
| 41 | #define RPR0521_ALS_DATA1_GAIN_SHIFT 2 |
| 42 | #define RPR0521_PXS_GAIN_MASK GENMASK(5, 4) |
| 43 | #define RPR0521_PXS_GAIN_SHIFT 4 |
| 44 | |
| 45 | #define RPR0521_MODE_ALS_ENABLE BIT(7) |
| 46 | #define RPR0521_MODE_ALS_DISABLE 0x00 |
| 47 | #define RPR0521_MODE_PXS_ENABLE BIT(6) |
| 48 | #define RPR0521_MODE_PXS_DISABLE 0x00 |
| 49 | |
| 50 | #define RPR0521_MANUFACT_ID 0xE0 |
| 51 | #define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */ |
| 52 | |
| 53 | #define RPR0521_DRV_NAME "RPR0521" |
| 54 | #define RPR0521_REGMAP_NAME "rpr0521_regmap" |
| 55 | |
| 56 | #define RPR0521_SLEEP_DELAY_MS 2000 |
| 57 | |
| 58 | #define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1" |
| 59 | #define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1" |
| 60 | |
| 61 | struct rpr0521_gain { |
| 62 | int scale; |
| 63 | int uscale; |
| 64 | }; |
| 65 | |
| 66 | static const struct rpr0521_gain rpr0521_als_gain[4] = { |
| 67 | {1, 0}, /* x1 */ |
| 68 | {0, 500000}, /* x2 */ |
| 69 | {0, 15625}, /* x64 */ |
| 70 | {0, 7812}, /* x128 */ |
| 71 | }; |
| 72 | |
| 73 | static const struct rpr0521_gain rpr0521_pxs_gain[3] = { |
| 74 | {1, 0}, /* x1 */ |
| 75 | {0, 500000}, /* x2 */ |
| 76 | {0, 125000}, /* x4 */ |
| 77 | }; |
| 78 | |
| 79 | enum rpr0521_channel { |
| 80 | RPR0521_CHAN_ALS_DATA0, |
| 81 | RPR0521_CHAN_ALS_DATA1, |
| 82 | RPR0521_CHAN_PXS, |
| 83 | }; |
| 84 | |
| 85 | struct rpr0521_reg_desc { |
| 86 | u8 address; |
| 87 | u8 device_mask; |
| 88 | }; |
| 89 | |
| 90 | static const struct rpr0521_reg_desc rpr0521_data_reg[] = { |
| 91 | [RPR0521_CHAN_ALS_DATA0] = { |
| 92 | .address = RPR0521_REG_ALS_DATA0, |
| 93 | .device_mask = RPR0521_MODE_ALS_MASK, |
| 94 | }, |
| 95 | [RPR0521_CHAN_ALS_DATA1] = { |
| 96 | .address = RPR0521_REG_ALS_DATA1, |
| 97 | .device_mask = RPR0521_MODE_ALS_MASK, |
| 98 | }, |
| 99 | [RPR0521_CHAN_PXS] = { |
| 100 | .address = RPR0521_REG_PXS_DATA, |
| 101 | .device_mask = RPR0521_MODE_PXS_MASK, |
| 102 | }, |
| 103 | }; |
| 104 | |
| 105 | static const struct rpr0521_gain_info { |
| 106 | u8 reg; |
| 107 | u8 mask; |
| 108 | u8 shift; |
| 109 | const struct rpr0521_gain *gain; |
| 110 | int size; |
| 111 | } rpr0521_gain[] = { |
| 112 | [RPR0521_CHAN_ALS_DATA0] = { |
| 113 | .reg = RPR0521_REG_ALS_CTRL, |
| 114 | .mask = RPR0521_ALS_DATA0_GAIN_MASK, |
| 115 | .shift = RPR0521_ALS_DATA0_GAIN_SHIFT, |
| 116 | .gain = rpr0521_als_gain, |
| 117 | .size = ARRAY_SIZE(rpr0521_als_gain), |
| 118 | }, |
| 119 | [RPR0521_CHAN_ALS_DATA1] = { |
| 120 | .reg = RPR0521_REG_ALS_CTRL, |
| 121 | .mask = RPR0521_ALS_DATA1_GAIN_MASK, |
| 122 | .shift = RPR0521_ALS_DATA1_GAIN_SHIFT, |
| 123 | .gain = rpr0521_als_gain, |
| 124 | .size = ARRAY_SIZE(rpr0521_als_gain), |
| 125 | }, |
| 126 | [RPR0521_CHAN_PXS] = { |
| 127 | .reg = RPR0521_REG_PXS_CTRL, |
| 128 | .mask = RPR0521_PXS_GAIN_MASK, |
| 129 | .shift = RPR0521_PXS_GAIN_SHIFT, |
| 130 | .gain = rpr0521_pxs_gain, |
| 131 | .size = ARRAY_SIZE(rpr0521_pxs_gain), |
| 132 | }, |
| 133 | }; |
| 134 | |
| 135 | struct rpr0521_data { |
| 136 | struct i2c_client *client; |
| 137 | |
| 138 | /* protect device params updates (e.g state, gain) */ |
| 139 | struct mutex lock; |
| 140 | |
| 141 | /* device active status */ |
| 142 | bool als_dev_en; |
| 143 | bool pxs_dev_en; |
| 144 | |
| 145 | /* optimize runtime pm ops - enable device only if needed */ |
| 146 | bool als_ps_need_en; |
| 147 | bool pxs_ps_need_en; |
| 148 | |
| 149 | struct regmap *regmap; |
| 150 | }; |
| 151 | |
| 152 | static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL); |
| 153 | static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL); |
| 154 | |
| 155 | static struct attribute *rpr0521_attributes[] = { |
| 156 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, |
| 157 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, |
| 158 | NULL, |
| 159 | }; |
| 160 | |
| 161 | static const struct attribute_group rpr0521_attribute_group = { |
| 162 | .attrs = rpr0521_attributes, |
| 163 | }; |
| 164 | |
| 165 | static const struct iio_chan_spec rpr0521_channels[] = { |
| 166 | { |
| 167 | .type = IIO_INTENSITY, |
| 168 | .modified = 1, |
| 169 | .address = RPR0521_CHAN_ALS_DATA0, |
| 170 | .channel2 = IIO_MOD_LIGHT_BOTH, |
| 171 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 172 | BIT(IIO_CHAN_INFO_SCALE), |
| 173 | }, |
| 174 | { |
| 175 | .type = IIO_INTENSITY, |
| 176 | .modified = 1, |
| 177 | .address = RPR0521_CHAN_ALS_DATA1, |
| 178 | .channel2 = IIO_MOD_LIGHT_IR, |
| 179 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 180 | BIT(IIO_CHAN_INFO_SCALE), |
| 181 | }, |
| 182 | { |
| 183 | .type = IIO_PROXIMITY, |
| 184 | .address = RPR0521_CHAN_PXS, |
| 185 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 186 | BIT(IIO_CHAN_INFO_SCALE), |
| 187 | } |
| 188 | }; |
| 189 | |
| 190 | static int rpr0521_als_enable(struct rpr0521_data *data, u8 status) |
| 191 | { |
| 192 | int ret; |
| 193 | |
| 194 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 195 | RPR0521_MODE_ALS_MASK, |
| 196 | status); |
| 197 | if (ret < 0) |
| 198 | return ret; |
| 199 | |
| 200 | data->als_dev_en = true; |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status) |
| 206 | { |
| 207 | int ret; |
| 208 | |
| 209 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 210 | RPR0521_MODE_PXS_MASK, |
| 211 | status); |
| 212 | if (ret < 0) |
| 213 | return ret; |
| 214 | |
| 215 | data->pxs_dev_en = true; |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * rpr0521_set_power_state - handles runtime PM state and sensors enabled status |
| 222 | * |
| 223 | * @data: rpr0521 device private data |
| 224 | * @on: state to be set for devices in @device_mask |
| 225 | * @device_mask: bitmask specifying for which device we need to update @on state |
| 226 | * |
| 227 | * We rely on rpr0521_runtime_resume to enable our @device_mask devices, but |
| 228 | * if (for example) PXS was enabled (pxs_dev_en = true) by a previous call to |
| 229 | * rpr0521_runtime_resume and we want to enable ALS we MUST set ALS enable |
| 230 | * bit of RPR0521_REG_MODE_CTRL here because rpr0521_runtime_resume will not |
| 231 | * be called twice. |
| 232 | */ |
| 233 | static int rpr0521_set_power_state(struct rpr0521_data *data, bool on, |
| 234 | u8 device_mask) |
| 235 | { |
| 236 | #ifdef CONFIG_PM |
| 237 | int ret; |
| 238 | u8 update_mask = 0; |
| 239 | |
| 240 | if (device_mask & RPR0521_MODE_ALS_MASK) { |
| 241 | if (on && !data->als_ps_need_en && data->pxs_dev_en) |
| 242 | update_mask |= RPR0521_MODE_ALS_MASK; |
| 243 | else |
| 244 | data->als_ps_need_en = on; |
| 245 | } |
| 246 | |
| 247 | if (device_mask & RPR0521_MODE_PXS_MASK) { |
| 248 | if (on && !data->pxs_ps_need_en && data->als_dev_en) |
| 249 | update_mask |= RPR0521_MODE_PXS_MASK; |
| 250 | else |
| 251 | data->pxs_ps_need_en = on; |
| 252 | } |
| 253 | |
| 254 | if (update_mask) { |
| 255 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 256 | update_mask, update_mask); |
| 257 | if (ret < 0) |
| 258 | return ret; |
| 259 | } |
| 260 | |
| 261 | if (on) { |
| 262 | ret = pm_runtime_get_sync(&data->client->dev); |
| 263 | } else { |
| 264 | pm_runtime_mark_last_busy(&data->client->dev); |
| 265 | ret = pm_runtime_put_autosuspend(&data->client->dev); |
| 266 | } |
| 267 | if (ret < 0) { |
| 268 | dev_err(&data->client->dev, |
| 269 | "Failed: rpr0521_set_power_state for %d, ret %d\n", |
| 270 | on, ret); |
| 271 | if (on) |
| 272 | pm_runtime_put_noidle(&data->client->dev); |
| 273 | |
| 274 | return ret; |
| 275 | } |
| 276 | #endif |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static int rpr0521_get_gain(struct rpr0521_data *data, int chan, |
| 281 | int *val, int *val2) |
| 282 | { |
| 283 | int ret, reg, idx; |
| 284 | |
| 285 | ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®); |
| 286 | if (ret < 0) |
| 287 | return ret; |
| 288 | |
| 289 | idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift; |
| 290 | *val = rpr0521_gain[chan].gain[idx].scale; |
| 291 | *val2 = rpr0521_gain[chan].gain[idx].uscale; |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | static int rpr0521_set_gain(struct rpr0521_data *data, int chan, |
| 297 | int val, int val2) |
| 298 | { |
| 299 | int i, idx = -EINVAL; |
| 300 | |
| 301 | /* get gain index */ |
| 302 | for (i = 0; i < rpr0521_gain[chan].size; i++) |
| 303 | if (val == rpr0521_gain[chan].gain[i].scale && |
| 304 | val2 == rpr0521_gain[chan].gain[i].uscale) { |
| 305 | idx = i; |
| 306 | break; |
| 307 | } |
| 308 | |
| 309 | if (idx < 0) |
| 310 | return idx; |
| 311 | |
| 312 | return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg, |
| 313 | rpr0521_gain[chan].mask, |
| 314 | idx << rpr0521_gain[chan].shift); |
| 315 | } |
| 316 | |
| 317 | static int rpr0521_read_raw(struct iio_dev *indio_dev, |
| 318 | struct iio_chan_spec const *chan, int *val, |
| 319 | int *val2, long mask) |
| 320 | { |
| 321 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 322 | int ret; |
| 323 | u8 device_mask; |
| 324 | __le16 raw_data; |
| 325 | |
| 326 | switch (mask) { |
| 327 | case IIO_CHAN_INFO_RAW: |
| 328 | if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY) |
| 329 | return -EINVAL; |
| 330 | |
| 331 | device_mask = rpr0521_data_reg[chan->address].device_mask; |
| 332 | |
| 333 | mutex_lock(&data->lock); |
| 334 | ret = rpr0521_set_power_state(data, true, device_mask); |
| 335 | if (ret < 0) { |
| 336 | mutex_unlock(&data->lock); |
| 337 | return ret; |
| 338 | } |
| 339 | |
| 340 | ret = regmap_bulk_read(data->regmap, |
| 341 | rpr0521_data_reg[chan->address].address, |
| 342 | &raw_data, 2); |
| 343 | if (ret < 0) { |
| 344 | rpr0521_set_power_state(data, false, device_mask); |
| 345 | mutex_unlock(&data->lock); |
| 346 | return ret; |
| 347 | } |
| 348 | |
| 349 | ret = rpr0521_set_power_state(data, false, device_mask); |
| 350 | mutex_unlock(&data->lock); |
| 351 | if (ret < 0) |
| 352 | return ret; |
| 353 | |
| 354 | *val = le16_to_cpu(raw_data); |
| 355 | |
| 356 | return IIO_VAL_INT; |
| 357 | case IIO_CHAN_INFO_SCALE: |
| 358 | mutex_lock(&data->lock); |
| 359 | ret = rpr0521_get_gain(data, chan->address, val, val2); |
| 360 | mutex_unlock(&data->lock); |
| 361 | if (ret < 0) |
| 362 | return ret; |
| 363 | |
| 364 | return IIO_VAL_INT_PLUS_MICRO; |
| 365 | default: |
| 366 | return -EINVAL; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | static int rpr0521_write_raw(struct iio_dev *indio_dev, |
| 371 | struct iio_chan_spec const *chan, int val, |
| 372 | int val2, long mask) |
| 373 | { |
| 374 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 375 | int ret; |
| 376 | |
| 377 | switch (mask) { |
| 378 | case IIO_CHAN_INFO_SCALE: |
| 379 | mutex_lock(&data->lock); |
| 380 | ret = rpr0521_set_gain(data, chan->address, val, val2); |
| 381 | mutex_unlock(&data->lock); |
| 382 | |
| 383 | return ret; |
| 384 | default: |
| 385 | return -EINVAL; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | static const struct iio_info rpr0521_info = { |
| 390 | .driver_module = THIS_MODULE, |
| 391 | .read_raw = rpr0521_read_raw, |
| 392 | .write_raw = rpr0521_write_raw, |
| 393 | .attrs = &rpr0521_attribute_group, |
| 394 | }; |
| 395 | |
| 396 | static int rpr0521_init(struct rpr0521_data *data) |
| 397 | { |
| 398 | int ret; |
| 399 | int id; |
| 400 | |
| 401 | ret = regmap_read(data->regmap, RPR0521_REG_ID, &id); |
| 402 | if (ret < 0) { |
| 403 | dev_err(&data->client->dev, "Failed to read REG_ID register\n"); |
| 404 | return ret; |
| 405 | } |
| 406 | |
| 407 | if (id != RPR0521_MANUFACT_ID) { |
| 408 | dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", |
| 409 | id, RPR0521_MANUFACT_ID); |
| 410 | return -ENODEV; |
| 411 | } |
| 412 | |
| 413 | /* set default measurement time - 100 ms for both ALS and PS */ |
| 414 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 415 | RPR0521_MODE_MEAS_TIME_MASK, |
| 416 | RPR0521_DEFAULT_MEAS_TIME); |
| 417 | if (ret) { |
| 418 | pr_err("regmap_update_bits returned %d\n", ret); |
| 419 | return ret; |
| 420 | } |
| 421 | |
| 422 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
| 423 | if (ret < 0) |
| 424 | return ret; |
| 425 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); |
| 426 | if (ret < 0) |
| 427 | return ret; |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | static int rpr0521_poweroff(struct rpr0521_data *data) |
| 433 | { |
| 434 | int ret; |
| 435 | |
| 436 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 437 | RPR0521_MODE_ALS_MASK | |
| 438 | RPR0521_MODE_PXS_MASK, |
| 439 | RPR0521_MODE_ALS_DISABLE | |
| 440 | RPR0521_MODE_PXS_DISABLE); |
| 441 | if (ret < 0) |
| 442 | return ret; |
| 443 | |
| 444 | data->als_dev_en = false; |
| 445 | data->pxs_dev_en = false; |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg) |
| 451 | { |
| 452 | switch (reg) { |
| 453 | case RPR0521_REG_MODE_CTRL: |
| 454 | case RPR0521_REG_ALS_CTRL: |
| 455 | case RPR0521_REG_PXS_CTRL: |
| 456 | return false; |
| 457 | default: |
| 458 | return true; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | static const struct regmap_config rpr0521_regmap_config = { |
| 463 | .name = RPR0521_REGMAP_NAME, |
| 464 | |
| 465 | .reg_bits = 8, |
| 466 | .val_bits = 8, |
| 467 | |
| 468 | .max_register = RPR0521_REG_ID, |
| 469 | .cache_type = REGCACHE_RBTREE, |
| 470 | .volatile_reg = rpr0521_is_volatile_reg, |
| 471 | }; |
| 472 | |
| 473 | static int rpr0521_probe(struct i2c_client *client, |
| 474 | const struct i2c_device_id *id) |
| 475 | { |
| 476 | struct rpr0521_data *data; |
| 477 | struct iio_dev *indio_dev; |
| 478 | struct regmap *regmap; |
| 479 | int ret; |
| 480 | |
| 481 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 482 | if (!indio_dev) |
| 483 | return -ENOMEM; |
| 484 | |
| 485 | regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config); |
| 486 | if (IS_ERR(regmap)) { |
| 487 | dev_err(&client->dev, "regmap_init failed!\n"); |
| 488 | return PTR_ERR(regmap); |
| 489 | } |
| 490 | |
| 491 | data = iio_priv(indio_dev); |
| 492 | i2c_set_clientdata(client, indio_dev); |
| 493 | data->client = client; |
| 494 | data->regmap = regmap; |
| 495 | |
| 496 | mutex_init(&data->lock); |
| 497 | |
| 498 | indio_dev->dev.parent = &client->dev; |
| 499 | indio_dev->info = &rpr0521_info; |
| 500 | indio_dev->name = RPR0521_DRV_NAME; |
| 501 | indio_dev->channels = rpr0521_channels; |
| 502 | indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels); |
| 503 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 504 | |
| 505 | ret = rpr0521_init(data); |
| 506 | if (ret < 0) { |
| 507 | dev_err(&client->dev, "rpr0521 chip init failed\n"); |
| 508 | return ret; |
| 509 | } |
Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 510 | |
| 511 | ret = pm_runtime_set_active(&client->dev); |
| 512 | if (ret < 0) |
Adriana Reus | 7d0ead5 | 2015-11-05 16:25:29 +0200 | [diff] [blame] | 513 | return ret; |
Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 514 | |
| 515 | pm_runtime_enable(&client->dev); |
| 516 | pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS); |
| 517 | pm_runtime_use_autosuspend(&client->dev); |
| 518 | |
Adriana Reus | 7d0ead5 | 2015-11-05 16:25:29 +0200 | [diff] [blame] | 519 | return iio_device_register(indio_dev); |
Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | static int rpr0521_remove(struct i2c_client *client) |
| 523 | { |
| 524 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 525 | |
Adriana Reus | 7d0ead5 | 2015-11-05 16:25:29 +0200 | [diff] [blame] | 526 | iio_device_unregister(indio_dev); |
| 527 | |
Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 528 | pm_runtime_disable(&client->dev); |
| 529 | pm_runtime_set_suspended(&client->dev); |
| 530 | pm_runtime_put_noidle(&client->dev); |
| 531 | |
Daniel Baluta | efa86e9 | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 532 | rpr0521_poweroff(iio_priv(indio_dev)); |
| 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | #ifdef CONFIG_PM |
| 538 | static int rpr0521_runtime_suspend(struct device *dev) |
| 539 | { |
| 540 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 541 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 542 | int ret; |
| 543 | |
| 544 | /* disable channels and sets {als,pxs}_dev_en to false */ |
| 545 | mutex_lock(&data->lock); |
| 546 | ret = rpr0521_poweroff(data); |
| 547 | mutex_unlock(&data->lock); |
| 548 | |
| 549 | return ret; |
| 550 | } |
| 551 | |
| 552 | static int rpr0521_runtime_resume(struct device *dev) |
| 553 | { |
| 554 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 555 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 556 | int ret; |
| 557 | |
| 558 | if (data->als_ps_need_en) { |
| 559 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
| 560 | if (ret < 0) |
| 561 | return ret; |
| 562 | data->als_ps_need_en = false; |
| 563 | } |
| 564 | |
| 565 | if (data->pxs_ps_need_en) { |
| 566 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); |
| 567 | if (ret < 0) |
| 568 | return ret; |
| 569 | data->pxs_ps_need_en = false; |
| 570 | } |
| 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | #endif |
| 575 | |
| 576 | static const struct dev_pm_ops rpr0521_pm_ops = { |
| 577 | SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend, |
| 578 | rpr0521_runtime_resume, NULL) |
| 579 | }; |
| 580 | |
| 581 | static const struct acpi_device_id rpr0521_acpi_match[] = { |
| 582 | {"RPR0521", 0}, |
| 583 | { } |
| 584 | }; |
| 585 | MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match); |
| 586 | |
| 587 | static const struct i2c_device_id rpr0521_id[] = { |
| 588 | {"rpr0521", 0}, |
| 589 | { } |
| 590 | }; |
| 591 | |
| 592 | MODULE_DEVICE_TABLE(i2c, rpr0521_id); |
| 593 | |
| 594 | static struct i2c_driver rpr0521_driver = { |
| 595 | .driver = { |
| 596 | .name = RPR0521_DRV_NAME, |
| 597 | .pm = &rpr0521_pm_ops, |
| 598 | .acpi_match_table = ACPI_PTR(rpr0521_acpi_match), |
| 599 | }, |
| 600 | .probe = rpr0521_probe, |
| 601 | .remove = rpr0521_remove, |
| 602 | .id_table = rpr0521_id, |
| 603 | }; |
| 604 | |
| 605 | module_i2c_driver(rpr0521_driver); |
| 606 | |
| 607 | MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); |
| 608 | MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver"); |
| 609 | MODULE_LICENSE("GPL v2"); |