Parthiban Nallathambi | 5570729 | 2018-11-07 18:08:20 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * VCNL4035 Ambient Light and Proximity Sensor - 7-bit I2C slave address 0x60 |
| 4 | * |
| 5 | * Copyright (c) 2018, DENX Software Engineering GmbH |
| 6 | * Author: Parthiban Nallathambi <pn@denx.de> |
| 7 | * |
| 8 | * TODO: Proximity |
| 9 | */ |
| 10 | #include <linux/bitops.h> |
| 11 | #include <linux/i2c.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/pm_runtime.h> |
| 14 | #include <linux/regmap.h> |
| 15 | |
| 16 | #include <linux/iio/buffer.h> |
| 17 | #include <linux/iio/events.h> |
| 18 | #include <linux/iio/iio.h> |
| 19 | #include <linux/iio/sysfs.h> |
| 20 | #include <linux/iio/trigger.h> |
| 21 | #include <linux/iio/trigger_consumer.h> |
| 22 | #include <linux/iio/triggered_buffer.h> |
| 23 | |
| 24 | #define VCNL4035_DRV_NAME "vcnl4035" |
| 25 | #define VCNL4035_IRQ_NAME "vcnl4035_event" |
| 26 | #define VCNL4035_REGMAP_NAME "vcnl4035_regmap" |
| 27 | |
| 28 | /* Device registers */ |
| 29 | #define VCNL4035_ALS_CONF 0x00 |
| 30 | #define VCNL4035_ALS_THDH 0x01 |
| 31 | #define VCNL4035_ALS_THDL 0x02 |
| 32 | #define VCNL4035_ALS_DATA 0x0B |
| 33 | #define VCNL4035_WHITE_DATA 0x0C |
| 34 | #define VCNL4035_INT_FLAG 0x0D |
| 35 | #define VCNL4035_DEV_ID 0x0E |
| 36 | |
| 37 | /* Register masks */ |
| 38 | #define VCNL4035_MODE_ALS_MASK BIT(0) |
| 39 | #define VCNL4035_MODE_ALS_WHITE_CHAN BIT(8) |
| 40 | #define VCNL4035_MODE_ALS_INT_MASK BIT(1) |
| 41 | #define VCNL4035_ALS_IT_MASK GENMASK(7, 5) |
| 42 | #define VCNL4035_ALS_PERS_MASK GENMASK(3, 2) |
| 43 | #define VCNL4035_INT_ALS_IF_H_MASK BIT(12) |
| 44 | #define VCNL4035_INT_ALS_IF_L_MASK BIT(13) |
| 45 | |
| 46 | /* Default values */ |
| 47 | #define VCNL4035_MODE_ALS_ENABLE BIT(0) |
| 48 | #define VCNL4035_MODE_ALS_DISABLE 0x00 |
| 49 | #define VCNL4035_MODE_ALS_INT_ENABLE BIT(1) |
| 50 | #define VCNL4035_MODE_ALS_INT_DISABLE 0 |
| 51 | #define VCNL4035_DEV_ID_VAL 0x80 |
| 52 | #define VCNL4035_ALS_IT_DEFAULT 0x01 |
| 53 | #define VCNL4035_ALS_PERS_DEFAULT 0x00 |
| 54 | #define VCNL4035_ALS_THDH_DEFAULT 5000 |
| 55 | #define VCNL4035_ALS_THDL_DEFAULT 100 |
| 56 | #define VCNL4035_SLEEP_DELAY_MS 2000 |
| 57 | |
| 58 | struct vcnl4035_data { |
| 59 | struct i2c_client *client; |
| 60 | struct regmap *regmap; |
| 61 | unsigned int als_it_val; |
| 62 | unsigned int als_persistence; |
| 63 | unsigned int als_thresh_low; |
| 64 | unsigned int als_thresh_high; |
| 65 | struct iio_trigger *drdy_trigger0; |
| 66 | }; |
| 67 | |
| 68 | static inline bool vcnl4035_is_triggered(struct vcnl4035_data *data) |
| 69 | { |
| 70 | int ret; |
| 71 | int reg; |
| 72 | |
| 73 | ret = regmap_read(data->regmap, VCNL4035_INT_FLAG, ®); |
| 74 | if (ret < 0) |
| 75 | return false; |
| 76 | |
| 77 | return !!(reg & |
| 78 | (VCNL4035_INT_ALS_IF_H_MASK | VCNL4035_INT_ALS_IF_L_MASK)); |
| 79 | } |
| 80 | |
| 81 | static irqreturn_t vcnl4035_drdy_irq_thread(int irq, void *private) |
| 82 | { |
| 83 | struct iio_dev *indio_dev = private; |
| 84 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 85 | |
| 86 | if (vcnl4035_is_triggered(data)) { |
| 87 | iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_LIGHT, |
| 88 | 0, |
| 89 | IIO_EV_TYPE_THRESH, |
| 90 | IIO_EV_DIR_EITHER), |
| 91 | iio_get_time_ns(indio_dev)); |
| 92 | iio_trigger_poll_chained(data->drdy_trigger0); |
| 93 | return IRQ_HANDLED; |
| 94 | } |
| 95 | |
| 96 | return IRQ_NONE; |
| 97 | } |
| 98 | |
| 99 | /* Triggered buffer */ |
| 100 | static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p) |
| 101 | { |
| 102 | struct iio_poll_func *pf = p; |
| 103 | struct iio_dev *indio_dev = pf->indio_dev; |
| 104 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 105 | u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)]; |
| 106 | int ret; |
| 107 | |
| 108 | ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer); |
| 109 | if (ret < 0) { |
| 110 | dev_err(&data->client->dev, |
| 111 | "Trigger consumer can't read from sensor.\n"); |
| 112 | goto fail_read; |
| 113 | } |
| 114 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, |
| 115 | iio_get_time_ns(indio_dev)); |
| 116 | |
| 117 | fail_read: |
| 118 | iio_trigger_notify_done(indio_dev->trig); |
| 119 | |
| 120 | return IRQ_HANDLED; |
| 121 | } |
| 122 | |
| 123 | static int vcnl4035_als_drdy_set_state(struct iio_trigger *trigger, |
| 124 | bool enable_drdy) |
| 125 | { |
| 126 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger); |
| 127 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 128 | int val = enable_drdy ? VCNL4035_MODE_ALS_INT_ENABLE : |
| 129 | VCNL4035_MODE_ALS_INT_DISABLE; |
| 130 | |
| 131 | return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 132 | VCNL4035_MODE_ALS_INT_MASK, |
| 133 | val); |
| 134 | } |
| 135 | |
| 136 | static const struct iio_trigger_ops vcnl4035_trigger_ops = { |
| 137 | .validate_device = iio_trigger_validate_own_device, |
| 138 | .set_trigger_state = vcnl4035_als_drdy_set_state, |
| 139 | }; |
| 140 | |
| 141 | static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on) |
| 142 | { |
| 143 | int ret; |
| 144 | struct device *dev = &data->client->dev; |
| 145 | |
| 146 | if (on) { |
| 147 | ret = pm_runtime_get_sync(dev); |
| 148 | if (ret < 0) |
| 149 | pm_runtime_put_noidle(dev); |
| 150 | } else { |
| 151 | pm_runtime_mark_last_busy(dev); |
| 152 | ret = pm_runtime_put_autosuspend(dev); |
| 153 | } |
| 154 | |
| 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Device IT INT Time (ms) Scale (lux/step) |
| 160 | * 000 50 0.064 |
| 161 | * 001 100 0.032 |
| 162 | * 010 200 0.016 |
| 163 | * 100 400 0.008 |
| 164 | * 101 - 111 800 0.004 |
| 165 | * Values are proportional, so ALS INT is selected for input due to |
| 166 | * simplicity reason. Integration time value and scaling is |
| 167 | * calculated based on device INT value |
| 168 | * |
| 169 | * Raw value needs to be scaled using ALS steps |
| 170 | */ |
| 171 | static int vcnl4035_read_raw(struct iio_dev *indio_dev, |
| 172 | struct iio_chan_spec const *chan, int *val, |
| 173 | int *val2, long mask) |
| 174 | { |
| 175 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 176 | int ret; |
| 177 | int raw_data; |
| 178 | unsigned int reg; |
| 179 | |
| 180 | switch (mask) { |
| 181 | case IIO_CHAN_INFO_RAW: |
| 182 | ret = vcnl4035_set_pm_runtime_state(data, true); |
| 183 | if (ret < 0) |
| 184 | return ret; |
| 185 | |
| 186 | ret = iio_device_claim_direct_mode(indio_dev); |
| 187 | if (!ret) { |
| 188 | if (chan->channel) |
| 189 | reg = VCNL4035_ALS_DATA; |
| 190 | else |
| 191 | reg = VCNL4035_WHITE_DATA; |
| 192 | ret = regmap_read(data->regmap, reg, &raw_data); |
| 193 | iio_device_release_direct_mode(indio_dev); |
| 194 | if (!ret) { |
| 195 | *val = raw_data; |
| 196 | ret = IIO_VAL_INT; |
| 197 | } |
| 198 | } |
| 199 | vcnl4035_set_pm_runtime_state(data, false); |
| 200 | return ret; |
| 201 | case IIO_CHAN_INFO_INT_TIME: |
| 202 | *val = 50; |
| 203 | if (data->als_it_val) |
| 204 | *val = data->als_it_val * 100; |
| 205 | return IIO_VAL_INT; |
| 206 | case IIO_CHAN_INFO_SCALE: |
| 207 | *val = 64; |
| 208 | if (!data->als_it_val) |
| 209 | *val2 = 1000; |
| 210 | else |
| 211 | *val2 = data->als_it_val * 2 * 1000; |
| 212 | return IIO_VAL_FRACTIONAL; |
| 213 | default: |
| 214 | return -EINVAL; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static int vcnl4035_write_raw(struct iio_dev *indio_dev, |
| 219 | struct iio_chan_spec const *chan, |
| 220 | int val, int val2, long mask) |
| 221 | { |
| 222 | int ret; |
| 223 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 224 | |
| 225 | switch (mask) { |
| 226 | case IIO_CHAN_INFO_INT_TIME: |
| 227 | if (val <= 0 || val > 800) |
| 228 | return -EINVAL; |
| 229 | |
| 230 | ret = vcnl4035_set_pm_runtime_state(data, true); |
| 231 | if (ret < 0) |
| 232 | return ret; |
| 233 | |
| 234 | ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 235 | VCNL4035_ALS_IT_MASK, |
| 236 | val / 100); |
| 237 | if (!ret) |
| 238 | data->als_it_val = val / 100; |
| 239 | |
| 240 | vcnl4035_set_pm_runtime_state(data, false); |
| 241 | return ret; |
| 242 | default: |
| 243 | return -EINVAL; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /* No direct ABI for persistence and threshold, so eventing */ |
| 248 | static int vcnl4035_read_thresh(struct iio_dev *indio_dev, |
| 249 | const struct iio_chan_spec *chan, enum iio_event_type type, |
| 250 | enum iio_event_direction dir, enum iio_event_info info, |
| 251 | int *val, int *val2) |
| 252 | { |
| 253 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 254 | |
| 255 | switch (info) { |
| 256 | case IIO_EV_INFO_VALUE: |
| 257 | switch (dir) { |
| 258 | case IIO_EV_DIR_RISING: |
| 259 | *val = data->als_thresh_high; |
| 260 | return IIO_VAL_INT; |
| 261 | case IIO_EV_DIR_FALLING: |
| 262 | *val = data->als_thresh_low; |
| 263 | return IIO_VAL_INT; |
| 264 | default: |
| 265 | return -EINVAL; |
| 266 | } |
| 267 | break; |
| 268 | case IIO_EV_INFO_PERIOD: |
| 269 | *val = data->als_persistence; |
| 270 | return IIO_VAL_INT; |
| 271 | default: |
| 272 | return -EINVAL; |
| 273 | } |
| 274 | |
| 275 | } |
| 276 | |
| 277 | static int vcnl4035_write_thresh(struct iio_dev *indio_dev, |
| 278 | const struct iio_chan_spec *chan, enum iio_event_type type, |
| 279 | enum iio_event_direction dir, enum iio_event_info info, int val, |
| 280 | int val2) |
| 281 | { |
| 282 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 283 | int ret; |
| 284 | |
| 285 | switch (info) { |
| 286 | case IIO_EV_INFO_VALUE: |
| 287 | /* 16 bit threshold range 0 - 65535 */ |
| 288 | if (val < 0 || val > 65535) |
| 289 | return -EINVAL; |
| 290 | if (dir == IIO_EV_DIR_RISING) { |
| 291 | if (val < data->als_thresh_low) |
| 292 | return -EINVAL; |
| 293 | ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, |
| 294 | val); |
| 295 | if (ret) |
| 296 | return ret; |
| 297 | data->als_thresh_high = val; |
| 298 | } else { |
| 299 | if (val > data->als_thresh_high) |
| 300 | return -EINVAL; |
| 301 | ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, |
| 302 | val); |
| 303 | if (ret) |
| 304 | return ret; |
| 305 | data->als_thresh_low = val; |
| 306 | } |
| 307 | return ret; |
| 308 | case IIO_EV_INFO_PERIOD: |
| 309 | /* allow only 1 2 4 8 as persistence value */ |
| 310 | if (val < 0 || val > 8 || hweight8(val) != 1) |
| 311 | return -EINVAL; |
| 312 | ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 313 | VCNL4035_ALS_PERS_MASK, val); |
| 314 | if (!ret) |
| 315 | data->als_persistence = val; |
| 316 | return ret; |
| 317 | default: |
| 318 | return -EINVAL; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | static IIO_CONST_ATTR_INT_TIME_AVAIL("50 100 200 400 800"); |
| 323 | |
| 324 | static struct attribute *vcnl4035_attributes[] = { |
| 325 | &iio_const_attr_integration_time_available.dev_attr.attr, |
| 326 | NULL, |
| 327 | }; |
| 328 | |
| 329 | static const struct attribute_group vcnl4035_attribute_group = { |
| 330 | .attrs = vcnl4035_attributes, |
| 331 | }; |
| 332 | |
| 333 | static const struct iio_info vcnl4035_info = { |
| 334 | .read_raw = vcnl4035_read_raw, |
| 335 | .write_raw = vcnl4035_write_raw, |
| 336 | .read_event_value = vcnl4035_read_thresh, |
| 337 | .write_event_value = vcnl4035_write_thresh, |
| 338 | .attrs = &vcnl4035_attribute_group, |
| 339 | }; |
| 340 | |
| 341 | static const struct iio_event_spec vcnl4035_event_spec[] = { |
| 342 | { |
| 343 | .type = IIO_EV_TYPE_THRESH, |
| 344 | .dir = IIO_EV_DIR_RISING, |
| 345 | .mask_separate = BIT(IIO_EV_INFO_VALUE), |
| 346 | }, { |
| 347 | .type = IIO_EV_TYPE_THRESH, |
| 348 | .dir = IIO_EV_DIR_FALLING, |
| 349 | .mask_separate = BIT(IIO_EV_INFO_VALUE), |
| 350 | }, { |
| 351 | .type = IIO_EV_TYPE_THRESH, |
| 352 | .dir = IIO_EV_DIR_EITHER, |
| 353 | .mask_separate = BIT(IIO_EV_INFO_PERIOD), |
| 354 | }, |
| 355 | }; |
| 356 | |
| 357 | enum vcnl4035_scan_index_order { |
| 358 | VCNL4035_CHAN_INDEX_LIGHT, |
| 359 | VCNL4035_CHAN_INDEX_WHITE_LED, |
| 360 | }; |
| 361 | |
| 362 | static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { |
| 363 | .validate_scan_mask = &iio_validate_scan_mask_onehot, |
| 364 | }; |
| 365 | |
| 366 | static const struct iio_chan_spec vcnl4035_channels[] = { |
| 367 | { |
| 368 | .type = IIO_LIGHT, |
| 369 | .channel = 0, |
| 370 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 371 | BIT(IIO_CHAN_INFO_INT_TIME) | |
| 372 | BIT(IIO_CHAN_INFO_SCALE), |
| 373 | .event_spec = vcnl4035_event_spec, |
| 374 | .num_event_specs = ARRAY_SIZE(vcnl4035_event_spec), |
| 375 | .scan_index = VCNL4035_CHAN_INDEX_LIGHT, |
| 376 | .scan_type = { |
| 377 | .sign = 'u', |
| 378 | .realbits = 16, |
| 379 | .storagebits = 16, |
| 380 | .endianness = IIO_LE, |
| 381 | }, |
| 382 | }, |
| 383 | { |
| 384 | .type = IIO_INTENSITY, |
| 385 | .channel = 1, |
| 386 | .modified = 1, |
| 387 | .channel2 = IIO_MOD_LIGHT_BOTH, |
| 388 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| 389 | .scan_index = VCNL4035_CHAN_INDEX_WHITE_LED, |
| 390 | .scan_type = { |
| 391 | .sign = 'u', |
| 392 | .realbits = 16, |
| 393 | .storagebits = 16, |
| 394 | .endianness = IIO_LE, |
| 395 | }, |
| 396 | }, |
| 397 | }; |
| 398 | |
| 399 | static int vcnl4035_set_als_power_state(struct vcnl4035_data *data, u8 status) |
| 400 | { |
| 401 | return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 402 | VCNL4035_MODE_ALS_MASK, |
| 403 | status); |
| 404 | } |
| 405 | |
| 406 | static int vcnl4035_init(struct vcnl4035_data *data) |
| 407 | { |
| 408 | int ret; |
| 409 | int id; |
| 410 | |
| 411 | ret = regmap_read(data->regmap, VCNL4035_DEV_ID, &id); |
| 412 | if (ret < 0) { |
| 413 | dev_err(&data->client->dev, "Failed to read DEV_ID register\n"); |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | if (id != VCNL4035_DEV_ID_VAL) { |
| 418 | dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", |
| 419 | id, VCNL4035_DEV_ID_VAL); |
| 420 | return -ENODEV; |
| 421 | } |
| 422 | |
| 423 | ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); |
| 424 | if (ret < 0) |
| 425 | return ret; |
| 426 | |
| 427 | /* ALS white channel enable */ |
| 428 | ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 429 | VCNL4035_MODE_ALS_WHITE_CHAN, |
| 430 | 1); |
| 431 | if (ret) { |
| 432 | dev_err(&data->client->dev, "set white channel enable %d\n", |
| 433 | ret); |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | /* set default integration time - 100 ms for ALS */ |
| 438 | ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 439 | VCNL4035_ALS_IT_MASK, |
| 440 | VCNL4035_ALS_IT_DEFAULT); |
| 441 | if (ret) { |
| 442 | dev_err(&data->client->dev, "set default ALS IT returned %d\n", |
| 443 | ret); |
| 444 | return ret; |
| 445 | } |
| 446 | data->als_it_val = VCNL4035_ALS_IT_DEFAULT; |
| 447 | |
| 448 | /* set default persistence time - 1 for ALS */ |
| 449 | ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, |
| 450 | VCNL4035_ALS_PERS_MASK, |
| 451 | VCNL4035_ALS_PERS_DEFAULT); |
| 452 | if (ret) { |
| 453 | dev_err(&data->client->dev, "set default PERS returned %d\n", |
| 454 | ret); |
| 455 | return ret; |
| 456 | } |
| 457 | data->als_persistence = VCNL4035_ALS_PERS_DEFAULT; |
| 458 | |
| 459 | /* set default HIGH threshold for ALS */ |
| 460 | ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, |
| 461 | VCNL4035_ALS_THDH_DEFAULT); |
| 462 | if (ret) { |
| 463 | dev_err(&data->client->dev, "set default THDH returned %d\n", |
| 464 | ret); |
| 465 | return ret; |
| 466 | } |
| 467 | data->als_thresh_high = VCNL4035_ALS_THDH_DEFAULT; |
| 468 | |
| 469 | /* set default LOW threshold for ALS */ |
| 470 | ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, |
| 471 | VCNL4035_ALS_THDL_DEFAULT); |
| 472 | if (ret) { |
| 473 | dev_err(&data->client->dev, "set default THDL returned %d\n", |
| 474 | ret); |
| 475 | return ret; |
| 476 | } |
| 477 | data->als_thresh_low = VCNL4035_ALS_THDL_DEFAULT; |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | static bool vcnl4035_is_volatile_reg(struct device *dev, unsigned int reg) |
| 483 | { |
| 484 | switch (reg) { |
| 485 | case VCNL4035_ALS_CONF: |
| 486 | case VCNL4035_DEV_ID: |
| 487 | return false; |
| 488 | default: |
| 489 | return true; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | static const struct regmap_config vcnl4035_regmap_config = { |
| 494 | .name = VCNL4035_REGMAP_NAME, |
| 495 | .reg_bits = 8, |
| 496 | .val_bits = 16, |
| 497 | .max_register = VCNL4035_DEV_ID, |
| 498 | .cache_type = REGCACHE_RBTREE, |
| 499 | .volatile_reg = vcnl4035_is_volatile_reg, |
| 500 | .val_format_endian = REGMAP_ENDIAN_LITTLE, |
| 501 | }; |
| 502 | |
| 503 | static int vcnl4035_probe_trigger(struct iio_dev *indio_dev) |
| 504 | { |
| 505 | int ret; |
| 506 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 507 | |
| 508 | data->drdy_trigger0 = devm_iio_trigger_alloc( |
| 509 | indio_dev->dev.parent, |
| 510 | "%s-dev%d", indio_dev->name, indio_dev->id); |
| 511 | if (!data->drdy_trigger0) |
| 512 | return -ENOMEM; |
| 513 | |
| 514 | data->drdy_trigger0->dev.parent = indio_dev->dev.parent; |
| 515 | data->drdy_trigger0->ops = &vcnl4035_trigger_ops; |
| 516 | iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev); |
| 517 | ret = devm_iio_trigger_register(indio_dev->dev.parent, |
| 518 | data->drdy_trigger0); |
| 519 | if (ret) { |
| 520 | dev_err(&data->client->dev, "iio trigger register failed\n"); |
| 521 | return ret; |
| 522 | } |
| 523 | |
| 524 | /* Trigger setup */ |
| 525 | ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev, |
| 526 | NULL, vcnl4035_trigger_consumer_handler, |
| 527 | &iio_triggered_buffer_setup_ops); |
| 528 | if (ret < 0) { |
| 529 | dev_err(&data->client->dev, "iio triggered buffer setup failed\n"); |
| 530 | return ret; |
| 531 | } |
| 532 | |
| 533 | /* IRQ to trigger mapping */ |
| 534 | ret = devm_request_threaded_irq(&data->client->dev, data->client->irq, |
| 535 | NULL, vcnl4035_drdy_irq_thread, |
| 536 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, |
| 537 | VCNL4035_IRQ_NAME, indio_dev); |
| 538 | if (ret < 0) |
| 539 | dev_err(&data->client->dev, "request irq %d for trigger0 failed\n", |
| 540 | data->client->irq); |
| 541 | return ret; |
| 542 | } |
| 543 | |
| 544 | static int vcnl4035_probe(struct i2c_client *client, |
| 545 | const struct i2c_device_id *id) |
| 546 | { |
| 547 | struct vcnl4035_data *data; |
| 548 | struct iio_dev *indio_dev; |
| 549 | struct regmap *regmap; |
| 550 | int ret; |
| 551 | |
| 552 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 553 | if (!indio_dev) |
| 554 | return -ENOMEM; |
| 555 | |
| 556 | regmap = devm_regmap_init_i2c(client, &vcnl4035_regmap_config); |
| 557 | if (IS_ERR(regmap)) { |
| 558 | dev_err(&client->dev, "regmap_init failed!\n"); |
| 559 | return PTR_ERR(regmap); |
| 560 | } |
| 561 | |
| 562 | data = iio_priv(indio_dev); |
| 563 | i2c_set_clientdata(client, indio_dev); |
| 564 | data->client = client; |
| 565 | data->regmap = regmap; |
| 566 | |
| 567 | indio_dev->dev.parent = &client->dev; |
| 568 | indio_dev->info = &vcnl4035_info; |
| 569 | indio_dev->name = VCNL4035_DRV_NAME; |
| 570 | indio_dev->channels = vcnl4035_channels; |
| 571 | indio_dev->num_channels = ARRAY_SIZE(vcnl4035_channels); |
| 572 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 573 | |
| 574 | ret = vcnl4035_init(data); |
| 575 | if (ret < 0) { |
| 576 | dev_err(&client->dev, "vcnl4035 chip init failed\n"); |
| 577 | return ret; |
| 578 | } |
| 579 | |
| 580 | if (client->irq > 0) { |
| 581 | ret = vcnl4035_probe_trigger(indio_dev); |
| 582 | if (ret < 0) { |
| 583 | dev_err(&client->dev, "vcnl4035 unable init trigger\n"); |
| 584 | goto fail_poweroff; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | ret = pm_runtime_set_active(&client->dev); |
| 589 | if (ret < 0) |
| 590 | goto fail_poweroff; |
| 591 | |
| 592 | ret = iio_device_register(indio_dev); |
| 593 | if (ret < 0) |
| 594 | goto fail_poweroff; |
| 595 | |
| 596 | pm_runtime_enable(&client->dev); |
| 597 | pm_runtime_set_autosuspend_delay(&client->dev, VCNL4035_SLEEP_DELAY_MS); |
| 598 | pm_runtime_use_autosuspend(&client->dev); |
| 599 | |
| 600 | return 0; |
| 601 | |
| 602 | fail_poweroff: |
| 603 | vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); |
| 604 | return ret; |
| 605 | } |
| 606 | |
| 607 | static int vcnl4035_remove(struct i2c_client *client) |
| 608 | { |
| 609 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 610 | |
| 611 | pm_runtime_dont_use_autosuspend(&client->dev); |
| 612 | pm_runtime_disable(&client->dev); |
| 613 | iio_device_unregister(indio_dev); |
| 614 | pm_runtime_set_suspended(&client->dev); |
| 615 | |
| 616 | return vcnl4035_set_als_power_state(iio_priv(indio_dev), |
| 617 | VCNL4035_MODE_ALS_DISABLE); |
| 618 | } |
| 619 | |
| 620 | static int __maybe_unused vcnl4035_runtime_suspend(struct device *dev) |
| 621 | { |
| 622 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 623 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 624 | int ret; |
| 625 | |
| 626 | ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); |
| 627 | regcache_mark_dirty(data->regmap); |
| 628 | |
| 629 | return ret; |
| 630 | } |
| 631 | |
| 632 | static int __maybe_unused vcnl4035_runtime_resume(struct device *dev) |
| 633 | { |
| 634 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 635 | struct vcnl4035_data *data = iio_priv(indio_dev); |
| 636 | int ret; |
| 637 | |
| 638 | regcache_sync(data->regmap); |
| 639 | ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); |
| 640 | if (ret < 0) |
| 641 | return ret; |
| 642 | |
| 643 | /* wait for 1 ALS integration cycle */ |
| 644 | msleep(data->als_it_val * 100); |
| 645 | |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | static const struct dev_pm_ops vcnl4035_pm_ops = { |
| 650 | SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
| 651 | pm_runtime_force_resume) |
| 652 | SET_RUNTIME_PM_OPS(vcnl4035_runtime_suspend, |
| 653 | vcnl4035_runtime_resume, NULL) |
| 654 | }; |
| 655 | |
| 656 | static const struct of_device_id vcnl4035_of_match[] = { |
| 657 | { .compatible = "vishay,vcnl4035", }, |
| 658 | { } |
| 659 | }; |
| 660 | MODULE_DEVICE_TABLE(of, vcnl4035_of_match); |
| 661 | |
| 662 | static struct i2c_driver vcnl4035_driver = { |
| 663 | .driver = { |
| 664 | .name = VCNL4035_DRV_NAME, |
| 665 | .pm = &vcnl4035_pm_ops, |
| 666 | .of_match_table = vcnl4035_of_match, |
| 667 | }, |
| 668 | .probe = vcnl4035_probe, |
| 669 | .remove = vcnl4035_remove, |
| 670 | }; |
| 671 | |
| 672 | module_i2c_driver(vcnl4035_driver); |
| 673 | |
| 674 | MODULE_AUTHOR("Parthiban Nallathambi <pn@denx.de>"); |
| 675 | MODULE_DESCRIPTION("VCNL4035 Ambient Light Sensor driver"); |
| 676 | MODULE_LICENSE("GPL v2"); |