1 /* 2 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 3 * Author: Beomho Seo <beomho.seo@samsung.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2, as published 7 * by the Free Software Foundation. 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/err.h> 12 #include <linux/i2c.h> 13 #include <linux/mutex.h> 14 #include <linux/module.h> 15 #include <linux/interrupt.h> 16 #include <linux/regulator/consumer.h> 17 #include <linux/iio/iio.h> 18 #include <linux/iio/sysfs.h> 19 #include <linux/iio/events.h> 20 21 /* Slave address 0x19 for PS of 7 bit addressing protocol for I2C */ 22 #define CM36651_I2C_ADDR_PS 0x19 23 /* Alert Response Address */ 24 #define CM36651_ARA 0x0C 25 26 /* Ambient light sensor */ 27 #define CM36651_CS_CONF1 0x00 28 #define CM36651_CS_CONF2 0x01 29 #define CM36651_ALS_WH_M 0x02 30 #define CM36651_ALS_WH_L 0x03 31 #define CM36651_ALS_WL_M 0x04 32 #define CM36651_ALS_WL_L 0x05 33 #define CM36651_CS_CONF3 0x06 34 #define CM36651_CS_CONF_REG_NUM 0x02 35 36 /* Proximity sensor */ 37 #define CM36651_PS_CONF1 0x00 38 #define CM36651_PS_THD 0x01 39 #define CM36651_PS_CANC 0x02 40 #define CM36651_PS_CONF2 0x03 41 #define CM36651_PS_REG_NUM 0x04 42 43 /* CS_CONF1 command code */ 44 #define CM36651_ALS_ENABLE 0x00 45 #define CM36651_ALS_DISABLE 0x01 46 #define CM36651_ALS_INT_EN 0x02 47 #define CM36651_ALS_THRES 0x04 48 49 /* CS_CONF2 command code */ 50 #define CM36651_CS_CONF2_DEFAULT_BIT 0x08 51 52 /* CS_CONF3 channel integration time */ 53 #define CM36651_CS_IT1 0x00 /* Integration time 80 msec */ 54 #define CM36651_CS_IT2 0x40 /* Integration time 160 msec */ 55 #define CM36651_CS_IT3 0x80 /* Integration time 320 msec */ 56 #define CM36651_CS_IT4 0xC0 /* Integration time 640 msec */ 57 58 /* PS_CONF1 command code */ 59 #define CM36651_PS_ENABLE 0x00 60 #define CM36651_PS_DISABLE 0x01 61 #define CM36651_PS_INT_EN 0x02 62 #define CM36651_PS_PERS2 0x04 63 #define CM36651_PS_PERS3 0x08 64 #define CM36651_PS_PERS4 0x0C 65 66 /* PS_CONF1 command code: integration time */ 67 #define CM36651_PS_IT1 0x00 /* Integration time 0.32 msec */ 68 #define CM36651_PS_IT2 0x10 /* Integration time 0.42 msec */ 69 #define CM36651_PS_IT3 0x20 /* Integration time 0.52 msec */ 70 #define CM36651_PS_IT4 0x30 /* Integration time 0.64 msec */ 71 72 /* PS_CONF1 command code: duty ratio */ 73 #define CM36651_PS_DR1 0x00 /* Duty ratio 1/80 */ 74 #define CM36651_PS_DR2 0x40 /* Duty ratio 1/160 */ 75 #define CM36651_PS_DR3 0x80 /* Duty ratio 1/320 */ 76 #define CM36651_PS_DR4 0xC0 /* Duty ratio 1/640 */ 77 78 /* PS_THD command code */ 79 #define CM36651_PS_INITIAL_THD 0x05 80 81 /* PS_CANC command code */ 82 #define CM36651_PS_CANC_DEFAULT 0x00 83 84 /* PS_CONF2 command code */ 85 #define CM36651_PS_HYS1 0x00 86 #define CM36651_PS_HYS2 0x01 87 #define CM36651_PS_SMART_PERS_EN 0x02 88 #define CM36651_PS_DIR_INT 0x04 89 #define CM36651_PS_MS 0x10 90 91 #define CM36651_CS_COLOR_NUM 4 92 93 #define CM36651_CLOSE_PROXIMITY 0x32 94 #define CM36651_FAR_PROXIMITY 0x33 95 96 #define CM36651_CS_INT_TIME_AVAIL "0.08 0.16 0.32 0.64" 97 #define CM36651_PS_INT_TIME_AVAIL "0.000320 0.000420 0.000520 0.000640" 98 99 enum cm36651_operation_mode { 100 CM36651_LIGHT_EN, 101 CM36651_PROXIMITY_EN, 102 CM36651_PROXIMITY_EV_EN, 103 }; 104 105 enum cm36651_light_channel_idx { 106 CM36651_LIGHT_CHANNEL_IDX_RED, 107 CM36651_LIGHT_CHANNEL_IDX_GREEN, 108 CM36651_LIGHT_CHANNEL_IDX_BLUE, 109 CM36651_LIGHT_CHANNEL_IDX_CLEAR, 110 }; 111 112 enum cm36651_command { 113 CM36651_CMD_READ_RAW_LIGHT, 114 CM36651_CMD_READ_RAW_PROXIMITY, 115 CM36651_CMD_PROX_EV_EN, 116 CM36651_CMD_PROX_EV_DIS, 117 }; 118 119 static const u8 cm36651_cs_reg[CM36651_CS_CONF_REG_NUM] = { 120 CM36651_CS_CONF1, 121 CM36651_CS_CONF2, 122 }; 123 124 static const u8 cm36651_ps_reg[CM36651_PS_REG_NUM] = { 125 CM36651_PS_CONF1, 126 CM36651_PS_THD, 127 CM36651_PS_CANC, 128 CM36651_PS_CONF2, 129 }; 130 131 struct cm36651_data { 132 const struct cm36651_platform_data *pdata; 133 struct i2c_client *client; 134 struct i2c_client *ps_client; 135 struct i2c_client *ara_client; 136 struct mutex lock; 137 struct regulator *vled_reg; 138 unsigned long flags; 139 int cs_int_time[CM36651_CS_COLOR_NUM]; 140 int ps_int_time; 141 u8 cs_ctrl_regs[CM36651_CS_CONF_REG_NUM]; 142 u8 ps_ctrl_regs[CM36651_PS_REG_NUM]; 143 u16 color[CM36651_CS_COLOR_NUM]; 144 }; 145 146 static int cm36651_setup_reg(struct cm36651_data *cm36651) 147 { 148 struct i2c_client *client = cm36651->client; 149 struct i2c_client *ps_client = cm36651->ps_client; 150 int i, ret; 151 152 /* CS initialization */ 153 cm36651->cs_ctrl_regs[CM36651_CS_CONF1] = CM36651_ALS_ENABLE | 154 CM36651_ALS_THRES; 155 cm36651->cs_ctrl_regs[CM36651_CS_CONF2] = CM36651_CS_CONF2_DEFAULT_BIT; 156 157 for (i = 0; i < CM36651_CS_CONF_REG_NUM; i++) { 158 ret = i2c_smbus_write_byte_data(client, cm36651_cs_reg[i], 159 cm36651->cs_ctrl_regs[i]); 160 if (ret < 0) 161 return ret; 162 } 163 164 /* PS initialization */ 165 cm36651->ps_ctrl_regs[CM36651_PS_CONF1] = CM36651_PS_ENABLE | 166 CM36651_PS_IT2; 167 cm36651->ps_ctrl_regs[CM36651_PS_THD] = CM36651_PS_INITIAL_THD; 168 cm36651->ps_ctrl_regs[CM36651_PS_CANC] = CM36651_PS_CANC_DEFAULT; 169 cm36651->ps_ctrl_regs[CM36651_PS_CONF2] = CM36651_PS_HYS2 | 170 CM36651_PS_DIR_INT | CM36651_PS_SMART_PERS_EN; 171 172 for (i = 0; i < CM36651_PS_REG_NUM; i++) { 173 ret = i2c_smbus_write_byte_data(ps_client, cm36651_ps_reg[i], 174 cm36651->ps_ctrl_regs[i]); 175 if (ret < 0) 176 return ret; 177 } 178 179 /* Set shutdown mode */ 180 ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, 181 CM36651_ALS_DISABLE); 182 if (ret < 0) 183 return ret; 184 185 ret = i2c_smbus_write_byte_data(cm36651->ps_client, 186 CM36651_PS_CONF1, CM36651_PS_DISABLE); 187 if (ret < 0) 188 return ret; 189 190 return 0; 191 } 192 193 static int cm36651_read_output(struct cm36651_data *cm36651, 194 struct iio_chan_spec const *chan, int *val) 195 { 196 struct i2c_client *client = cm36651->client; 197 int ret = -EINVAL; 198 199 switch (chan->type) { 200 case IIO_LIGHT: 201 *val = i2c_smbus_read_word_data(client, chan->address); 202 if (*val < 0) 203 return ret; 204 205 ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, 206 CM36651_ALS_DISABLE); 207 if (ret < 0) 208 return ret; 209 210 ret = IIO_VAL_INT; 211 break; 212 case IIO_PROXIMITY: 213 *val = i2c_smbus_read_byte(cm36651->ps_client); 214 if (*val < 0) 215 return ret; 216 217 if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { 218 ret = i2c_smbus_write_byte_data(cm36651->ps_client, 219 CM36651_PS_CONF1, CM36651_PS_DISABLE); 220 if (ret < 0) 221 return ret; 222 } 223 224 ret = IIO_VAL_INT; 225 break; 226 default: 227 break; 228 } 229 230 return ret; 231 } 232 233 static irqreturn_t cm36651_irq_handler(int irq, void *data) 234 { 235 struct iio_dev *indio_dev = data; 236 struct cm36651_data *cm36651 = iio_priv(indio_dev); 237 struct i2c_client *client = cm36651->client; 238 int ev_dir, ret; 239 u64 ev_code; 240 241 /* 242 * The PS INT pin is an active low signal that PS INT move logic low 243 * when the object is detect. Once the MCU host received the PS INT 244 * "LOW" signal, the Host needs to read the data at Alert Response 245 * Address(ARA) to clear the PS INT signal. After clearing the PS 246 * INT pin, the PS INT signal toggles from low to high. 247 */ 248 ret = i2c_smbus_read_byte(cm36651->ara_client); 249 if (ret < 0) { 250 dev_err(&client->dev, 251 "%s: Data read failed: %d\n", __func__, ret); 252 return IRQ_HANDLED; 253 } 254 switch (ret) { 255 case CM36651_CLOSE_PROXIMITY: 256 ev_dir = IIO_EV_DIR_RISING; 257 break; 258 case CM36651_FAR_PROXIMITY: 259 ev_dir = IIO_EV_DIR_FALLING; 260 break; 261 default: 262 dev_err(&client->dev, 263 "%s: Data read wrong: %d\n", __func__, ret); 264 return IRQ_HANDLED; 265 } 266 267 ev_code = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 268 CM36651_CMD_READ_RAW_PROXIMITY, 269 IIO_EV_TYPE_THRESH, ev_dir); 270 271 iio_push_event(indio_dev, ev_code, iio_get_time_ns()); 272 273 return IRQ_HANDLED; 274 } 275 276 static int cm36651_set_operation_mode(struct cm36651_data *cm36651, int cmd) 277 { 278 struct i2c_client *client = cm36651->client; 279 struct i2c_client *ps_client = cm36651->ps_client; 280 int ret = -EINVAL; 281 282 switch (cmd) { 283 case CM36651_CMD_READ_RAW_LIGHT: 284 ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, 285 cm36651->cs_ctrl_regs[CM36651_CS_CONF1]); 286 break; 287 case CM36651_CMD_READ_RAW_PROXIMITY: 288 if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) 289 return CM36651_PROXIMITY_EV_EN; 290 291 ret = i2c_smbus_write_byte_data(ps_client, CM36651_PS_CONF1, 292 cm36651->ps_ctrl_regs[CM36651_PS_CONF1]); 293 break; 294 case CM36651_CMD_PROX_EV_EN: 295 if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { 296 dev_err(&client->dev, 297 "Already proximity event enable state\n"); 298 return ret; 299 } 300 set_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); 301 302 ret = i2c_smbus_write_byte_data(ps_client, 303 cm36651_ps_reg[CM36651_PS_CONF1], 304 CM36651_PS_INT_EN | CM36651_PS_PERS2 | CM36651_PS_IT2); 305 306 if (ret < 0) { 307 dev_err(&client->dev, "Proximity enable event failed\n"); 308 return ret; 309 } 310 break; 311 case CM36651_CMD_PROX_EV_DIS: 312 if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { 313 dev_err(&client->dev, 314 "Already proximity event disable state\n"); 315 return ret; 316 } 317 clear_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); 318 ret = i2c_smbus_write_byte_data(ps_client, 319 CM36651_PS_CONF1, CM36651_PS_DISABLE); 320 break; 321 } 322 323 if (ret < 0) 324 dev_err(&client->dev, "Write register failed\n"); 325 326 return ret; 327 } 328 329 static int cm36651_read_channel(struct cm36651_data *cm36651, 330 struct iio_chan_spec const *chan, int *val) 331 { 332 struct i2c_client *client = cm36651->client; 333 int cmd, ret; 334 335 if (chan->type == IIO_LIGHT) 336 cmd = CM36651_CMD_READ_RAW_LIGHT; 337 else if (chan->type == IIO_PROXIMITY) 338 cmd = CM36651_CMD_READ_RAW_PROXIMITY; 339 else 340 return -EINVAL; 341 342 ret = cm36651_set_operation_mode(cm36651, cmd); 343 if (ret < 0) { 344 dev_err(&client->dev, "CM36651 set operation mode failed\n"); 345 return ret; 346 } 347 /* Delay for work after enable operation */ 348 msleep(50); 349 ret = cm36651_read_output(cm36651, chan, val); 350 if (ret < 0) { 351 dev_err(&client->dev, "CM36651 read output failed\n"); 352 return ret; 353 } 354 355 return ret; 356 } 357 358 static int cm36651_read_int_time(struct cm36651_data *cm36651, 359 struct iio_chan_spec const *chan, int *val2) 360 { 361 switch (chan->type) { 362 case IIO_LIGHT: 363 if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT1) 364 *val2 = 80000; 365 else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT2) 366 *val2 = 160000; 367 else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT3) 368 *val2 = 320000; 369 else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT4) 370 *val2 = 640000; 371 else 372 return -EINVAL; 373 break; 374 case IIO_PROXIMITY: 375 if (cm36651->ps_int_time == CM36651_PS_IT1) 376 *val2 = 320; 377 else if (cm36651->ps_int_time == CM36651_PS_IT2) 378 *val2 = 420; 379 else if (cm36651->ps_int_time == CM36651_PS_IT3) 380 *val2 = 520; 381 else if (cm36651->ps_int_time == CM36651_PS_IT4) 382 *val2 = 640; 383 else 384 return -EINVAL; 385 break; 386 default: 387 return -EINVAL; 388 } 389 390 return IIO_VAL_INT_PLUS_MICRO; 391 } 392 393 static int cm36651_write_int_time(struct cm36651_data *cm36651, 394 struct iio_chan_spec const *chan, int val) 395 { 396 struct i2c_client *client = cm36651->client; 397 struct i2c_client *ps_client = cm36651->ps_client; 398 int int_time, ret; 399 400 switch (chan->type) { 401 case IIO_LIGHT: 402 if (val == 80000) 403 int_time = CM36651_CS_IT1; 404 else if (val == 160000) 405 int_time = CM36651_CS_IT2; 406 else if (val == 320000) 407 int_time = CM36651_CS_IT3; 408 else if (val == 640000) 409 int_time = CM36651_CS_IT4; 410 else 411 return -EINVAL; 412 413 ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF3, 414 int_time >> 2 * (chan->address)); 415 if (ret < 0) { 416 dev_err(&client->dev, "CS integration time write failed\n"); 417 return ret; 418 } 419 cm36651->cs_int_time[chan->address] = int_time; 420 break; 421 case IIO_PROXIMITY: 422 if (val == 320) 423 int_time = CM36651_PS_IT1; 424 else if (val == 420) 425 int_time = CM36651_PS_IT2; 426 else if (val == 520) 427 int_time = CM36651_PS_IT3; 428 else if (val == 640) 429 int_time = CM36651_PS_IT4; 430 else 431 return -EINVAL; 432 433 ret = i2c_smbus_write_byte_data(ps_client, 434 CM36651_PS_CONF1, int_time); 435 if (ret < 0) { 436 dev_err(&client->dev, "PS integration time write failed\n"); 437 return ret; 438 } 439 cm36651->ps_int_time = int_time; 440 break; 441 default: 442 return -EINVAL; 443 } 444 445 return ret; 446 } 447 448 static int cm36651_read_raw(struct iio_dev *indio_dev, 449 struct iio_chan_spec const *chan, 450 int *val, int *val2, long mask) 451 { 452 struct cm36651_data *cm36651 = iio_priv(indio_dev); 453 int ret; 454 455 mutex_lock(&cm36651->lock); 456 457 switch (mask) { 458 case IIO_CHAN_INFO_RAW: 459 ret = cm36651_read_channel(cm36651, chan, val); 460 break; 461 case IIO_CHAN_INFO_INT_TIME: 462 *val = 0; 463 ret = cm36651_read_int_time(cm36651, chan, val2); 464 break; 465 default: 466 ret = -EINVAL; 467 } 468 469 mutex_unlock(&cm36651->lock); 470 471 return ret; 472 } 473 474 static int cm36651_write_raw(struct iio_dev *indio_dev, 475 struct iio_chan_spec const *chan, 476 int val, int val2, long mask) 477 { 478 struct cm36651_data *cm36651 = iio_priv(indio_dev); 479 struct i2c_client *client = cm36651->client; 480 int ret = -EINVAL; 481 482 if (mask == IIO_CHAN_INFO_INT_TIME) { 483 ret = cm36651_write_int_time(cm36651, chan, val2); 484 if (ret < 0) 485 dev_err(&client->dev, "Integration time write failed\n"); 486 } 487 488 return ret; 489 } 490 491 static int cm36651_read_prox_thresh(struct iio_dev *indio_dev, 492 const struct iio_chan_spec *chan, 493 enum iio_event_type type, 494 enum iio_event_direction dir, 495 enum iio_event_info info, 496 int *val, int *val2) 497 { 498 struct cm36651_data *cm36651 = iio_priv(indio_dev); 499 500 *val = cm36651->ps_ctrl_regs[CM36651_PS_THD]; 501 502 return 0; 503 } 504 505 static int cm36651_write_prox_thresh(struct iio_dev *indio_dev, 506 const struct iio_chan_spec *chan, 507 enum iio_event_type type, 508 enum iio_event_direction dir, 509 enum iio_event_info info, 510 int val, int val2) 511 { 512 struct cm36651_data *cm36651 = iio_priv(indio_dev); 513 struct i2c_client *client = cm36651->client; 514 int ret; 515 516 if (val < 3 || val > 255) 517 return -EINVAL; 518 519 cm36651->ps_ctrl_regs[CM36651_PS_THD] = val; 520 ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_THD, 521 cm36651->ps_ctrl_regs[CM36651_PS_THD]); 522 523 if (ret < 0) { 524 dev_err(&client->dev, "PS threshold write failed: %d\n", ret); 525 return ret; 526 } 527 528 return 0; 529 } 530 531 static int cm36651_write_prox_event_config(struct iio_dev *indio_dev, 532 const struct iio_chan_spec *chan, 533 enum iio_event_type type, 534 enum iio_event_direction dir, 535 int state) 536 { 537 struct cm36651_data *cm36651 = iio_priv(indio_dev); 538 int cmd, ret = -EINVAL; 539 540 mutex_lock(&cm36651->lock); 541 542 cmd = state ? CM36651_CMD_PROX_EV_EN : CM36651_CMD_PROX_EV_DIS; 543 ret = cm36651_set_operation_mode(cm36651, cmd); 544 545 mutex_unlock(&cm36651->lock); 546 547 return ret; 548 } 549 550 static int cm36651_read_prox_event_config(struct iio_dev *indio_dev, 551 const struct iio_chan_spec *chan, 552 enum iio_event_type type, 553 enum iio_event_direction dir) 554 { 555 struct cm36651_data *cm36651 = iio_priv(indio_dev); 556 int event_en; 557 558 mutex_lock(&cm36651->lock); 559 560 event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); 561 562 mutex_unlock(&cm36651->lock); 563 564 return event_en; 565 } 566 567 #define CM36651_LIGHT_CHANNEL(_color, _idx) { \ 568 .type = IIO_LIGHT, \ 569 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 570 BIT(IIO_CHAN_INFO_INT_TIME), \ 571 .address = _idx, \ 572 .modified = 1, \ 573 .channel2 = IIO_MOD_LIGHT_##_color, \ 574 } \ 575 576 static const struct iio_event_spec cm36651_event_spec[] = { 577 { 578 .type = IIO_EV_TYPE_THRESH, 579 .dir = IIO_EV_DIR_EITHER, 580 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 581 BIT(IIO_EV_INFO_ENABLE), 582 } 583 }; 584 585 static const struct iio_chan_spec cm36651_channels[] = { 586 { 587 .type = IIO_PROXIMITY, 588 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 589 BIT(IIO_CHAN_INFO_INT_TIME), 590 .event_spec = cm36651_event_spec, 591 .num_event_specs = ARRAY_SIZE(cm36651_event_spec), 592 }, 593 CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED), 594 CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN), 595 CM36651_LIGHT_CHANNEL(BLUE, CM36651_LIGHT_CHANNEL_IDX_BLUE), 596 CM36651_LIGHT_CHANNEL(CLEAR, CM36651_LIGHT_CHANNEL_IDX_CLEAR), 597 }; 598 599 static IIO_CONST_ATTR(in_illuminance_integration_time_available, 600 CM36651_CS_INT_TIME_AVAIL); 601 static IIO_CONST_ATTR(in_proximity_integration_time_available, 602 CM36651_PS_INT_TIME_AVAIL); 603 604 static struct attribute *cm36651_attributes[] = { 605 &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, 606 &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, 607 NULL, 608 }; 609 610 static const struct attribute_group cm36651_attribute_group = { 611 .attrs = cm36651_attributes 612 }; 613 614 static const struct iio_info cm36651_info = { 615 .driver_module = THIS_MODULE, 616 .read_raw = &cm36651_read_raw, 617 .write_raw = &cm36651_write_raw, 618 .read_event_value = &cm36651_read_prox_thresh, 619 .write_event_value = &cm36651_write_prox_thresh, 620 .read_event_config = &cm36651_read_prox_event_config, 621 .write_event_config = &cm36651_write_prox_event_config, 622 .attrs = &cm36651_attribute_group, 623 }; 624 625 static int cm36651_probe(struct i2c_client *client, 626 const struct i2c_device_id *id) 627 { 628 struct cm36651_data *cm36651; 629 struct iio_dev *indio_dev; 630 int ret; 631 632 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm36651)); 633 if (!indio_dev) 634 return -ENOMEM; 635 636 cm36651 = iio_priv(indio_dev); 637 638 cm36651->vled_reg = devm_regulator_get(&client->dev, "vled"); 639 if (IS_ERR(cm36651->vled_reg)) { 640 dev_err(&client->dev, "get regulator vled failed\n"); 641 return PTR_ERR(cm36651->vled_reg); 642 } 643 644 ret = regulator_enable(cm36651->vled_reg); 645 if (ret) { 646 dev_err(&client->dev, "enable regulator vled failed\n"); 647 return ret; 648 } 649 650 i2c_set_clientdata(client, indio_dev); 651 652 cm36651->client = client; 653 cm36651->ps_client = i2c_new_dummy(client->adapter, 654 CM36651_I2C_ADDR_PS); 655 if (!cm36651->ps_client) { 656 dev_err(&client->dev, "%s: new i2c device failed\n", __func__); 657 ret = -ENODEV; 658 goto error_disable_reg; 659 } 660 661 cm36651->ara_client = i2c_new_dummy(client->adapter, CM36651_ARA); 662 if (!cm36651->ara_client) { 663 dev_err(&client->dev, "%s: new i2c device failed\n", __func__); 664 ret = -ENODEV; 665 goto error_i2c_unregister_ps; 666 } 667 668 mutex_init(&cm36651->lock); 669 indio_dev->dev.parent = &client->dev; 670 indio_dev->channels = cm36651_channels; 671 indio_dev->num_channels = ARRAY_SIZE(cm36651_channels); 672 indio_dev->info = &cm36651_info; 673 indio_dev->name = id->name; 674 indio_dev->modes = INDIO_DIRECT_MODE; 675 676 ret = cm36651_setup_reg(cm36651); 677 if (ret) { 678 dev_err(&client->dev, "%s: register setup failed\n", __func__); 679 goto error_i2c_unregister_ara; 680 } 681 682 ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler, 683 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 684 "cm36651", indio_dev); 685 if (ret) { 686 dev_err(&client->dev, "%s: request irq failed\n", __func__); 687 goto error_i2c_unregister_ara; 688 } 689 690 ret = iio_device_register(indio_dev); 691 if (ret) { 692 dev_err(&client->dev, "%s: regist device failed\n", __func__); 693 goto error_free_irq; 694 } 695 696 return 0; 697 698 error_free_irq: 699 free_irq(client->irq, indio_dev); 700 error_i2c_unregister_ara: 701 i2c_unregister_device(cm36651->ara_client); 702 error_i2c_unregister_ps: 703 i2c_unregister_device(cm36651->ps_client); 704 error_disable_reg: 705 regulator_disable(cm36651->vled_reg); 706 return ret; 707 } 708 709 static int cm36651_remove(struct i2c_client *client) 710 { 711 struct iio_dev *indio_dev = i2c_get_clientdata(client); 712 struct cm36651_data *cm36651 = iio_priv(indio_dev); 713 714 iio_device_unregister(indio_dev); 715 regulator_disable(cm36651->vled_reg); 716 free_irq(client->irq, indio_dev); 717 i2c_unregister_device(cm36651->ps_client); 718 i2c_unregister_device(cm36651->ara_client); 719 720 return 0; 721 } 722 723 static const struct i2c_device_id cm36651_id[] = { 724 { "cm36651", 0 }, 725 { } 726 }; 727 728 MODULE_DEVICE_TABLE(i2c, cm36651_id); 729 730 static const struct of_device_id cm36651_of_match[] = { 731 { .compatible = "capella,cm36651" }, 732 { } 733 }; 734 MODULE_DEVICE_TABLE(of, cm36651_of_match); 735 736 static struct i2c_driver cm36651_driver = { 737 .driver = { 738 .name = "cm36651", 739 .of_match_table = cm36651_of_match, 740 }, 741 .probe = cm36651_probe, 742 .remove = cm36651_remove, 743 .id_table = cm36651_id, 744 }; 745 746 module_i2c_driver(cm36651_driver); 747 748 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); 749 MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver"); 750 MODULE_LICENSE("GPL v2"); 751