1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * DRV260X haptics driver family 4 * 5 * Author: Dan Murphy <dmurphy@ti.com> 6 * 7 * Copyright: (C) 2014 Texas Instruments, Inc. 8 */ 9 10#include <linux/i2c.h> 11#include <linux/input.h> 12#include <linux/module.h> 13#include <linux/regmap.h> 14#include <linux/slab.h> 15#include <linux/delay.h> 16#include <linux/gpio/consumer.h> 17#include <linux/regulator/consumer.h> 18 19#include <dt-bindings/input/ti-drv260x.h> 20 21#define DRV260X_STATUS 0x0 22#define DRV260X_MODE 0x1 23#define DRV260X_RT_PB_IN 0x2 24#define DRV260X_LIB_SEL 0x3 25#define DRV260X_WV_SEQ_1 0x4 26#define DRV260X_WV_SEQ_2 0x5 27#define DRV260X_WV_SEQ_3 0x6 28#define DRV260X_WV_SEQ_4 0x7 29#define DRV260X_WV_SEQ_5 0x8 30#define DRV260X_WV_SEQ_6 0x9 31#define DRV260X_WV_SEQ_7 0xa 32#define DRV260X_WV_SEQ_8 0xb 33#define DRV260X_GO 0xc 34#define DRV260X_OVERDRIVE_OFF 0xd 35#define DRV260X_SUSTAIN_P_OFF 0xe 36#define DRV260X_SUSTAIN_N_OFF 0xf 37#define DRV260X_BRAKE_OFF 0x10 38#define DRV260X_A_TO_V_CTRL 0x11 39#define DRV260X_A_TO_V_MIN_INPUT 0x12 40#define DRV260X_A_TO_V_MAX_INPUT 0x13 41#define DRV260X_A_TO_V_MIN_OUT 0x14 42#define DRV260X_A_TO_V_MAX_OUT 0x15 43#define DRV260X_RATED_VOLT 0x16 44#define DRV260X_OD_CLAMP_VOLT 0x17 45#define DRV260X_CAL_COMP 0x18 46#define DRV260X_CAL_BACK_EMF 0x19 47#define DRV260X_FEEDBACK_CTRL 0x1a 48#define DRV260X_CTRL1 0x1b 49#define DRV260X_CTRL2 0x1c 50#define DRV260X_CTRL3 0x1d 51#define DRV260X_CTRL4 0x1e 52#define DRV260X_CTRL5 0x1f 53#define DRV260X_LRA_LOOP_PERIOD 0x20 54#define DRV260X_VBAT_MON 0x21 55#define DRV260X_LRA_RES_PERIOD 0x22 56#define DRV260X_MAX_REG 0x23 57 58#define DRV260X_GO_BIT 0x01 59 60/* Library Selection */ 61#define DRV260X_LIB_SEL_MASK 0x07 62#define DRV260X_LIB_SEL_RAM 0x0 63#define DRV260X_LIB_SEL_OD 0x1 64#define DRV260X_LIB_SEL_40_60 0x2 65#define DRV260X_LIB_SEL_60_80 0x3 66#define DRV260X_LIB_SEL_100_140 0x4 67#define DRV260X_LIB_SEL_140_PLUS 0x5 68 69#define DRV260X_LIB_SEL_HIZ_MASK 0x10 70#define DRV260X_LIB_SEL_HIZ_EN 0x01 71#define DRV260X_LIB_SEL_HIZ_DIS 0 72 73/* Mode register */ 74#define DRV260X_STANDBY (1 << 6) 75#define DRV260X_STANDBY_MASK 0x40 76#define DRV260X_INTERNAL_TRIGGER 0x00 77#define DRV260X_EXT_TRIGGER_EDGE 0x01 78#define DRV260X_EXT_TRIGGER_LEVEL 0x02 79#define DRV260X_PWM_ANALOG_IN 0x03 80#define DRV260X_AUDIOHAPTIC 0x04 81#define DRV260X_RT_PLAYBACK 0x05 82#define DRV260X_DIAGNOSTICS 0x06 83#define DRV260X_AUTO_CAL 0x07 84 85/* Audio to Haptics Control */ 86#define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2) 87#define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2) 88#define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2) 89#define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2) 90 91#define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00 92#define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01 93#define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02 94#define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03 95 96/* Min/Max Input/Output Voltages */ 97#define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19 98#define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64 99#define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19 100#define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF 101 102/* Feedback register */ 103#define DRV260X_FB_REG_ERM_MODE 0x7f 104#define DRV260X_FB_REG_LRA_MODE (1 << 7) 105 106#define DRV260X_BRAKE_FACTOR_MASK 0x1f 107#define DRV260X_BRAKE_FACTOR_2X (1 << 0) 108#define DRV260X_BRAKE_FACTOR_3X (2 << 4) 109#define DRV260X_BRAKE_FACTOR_4X (3 << 4) 110#define DRV260X_BRAKE_FACTOR_6X (4 << 4) 111#define DRV260X_BRAKE_FACTOR_8X (5 << 4) 112#define DRV260X_BRAKE_FACTOR_16 (6 << 4) 113#define DRV260X_BRAKE_FACTOR_DIS (7 << 4) 114 115#define DRV260X_LOOP_GAIN_LOW 0xf3 116#define DRV260X_LOOP_GAIN_MED (1 << 2) 117#define DRV260X_LOOP_GAIN_HIGH (2 << 2) 118#define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2) 119 120#define DRV260X_BEMF_GAIN_0 0xfc 121#define DRV260X_BEMF_GAIN_1 (1 << 0) 122#define DRV260X_BEMF_GAIN_2 (2 << 0) 123#define DRV260X_BEMF_GAIN_3 (3 << 0) 124 125/* Control 1 register */ 126#define DRV260X_AC_CPLE_EN (1 << 5) 127#define DRV260X_STARTUP_BOOST (1 << 7) 128 129/* Control 2 register */ 130 131#define DRV260X_IDISS_TIME_45 0 132#define DRV260X_IDISS_TIME_75 (1 << 0) 133#define DRV260X_IDISS_TIME_150 (1 << 1) 134#define DRV260X_IDISS_TIME_225 0x03 135 136#define DRV260X_BLANK_TIME_45 (0 << 2) 137#define DRV260X_BLANK_TIME_75 (1 << 2) 138#define DRV260X_BLANK_TIME_150 (2 << 2) 139#define DRV260X_BLANK_TIME_225 (3 << 2) 140 141#define DRV260X_SAMP_TIME_150 (0 << 4) 142#define DRV260X_SAMP_TIME_200 (1 << 4) 143#define DRV260X_SAMP_TIME_250 (2 << 4) 144#define DRV260X_SAMP_TIME_300 (3 << 4) 145 146#define DRV260X_BRAKE_STABILIZER (1 << 6) 147#define DRV260X_UNIDIR_IN (0 << 7) 148#define DRV260X_BIDIR_IN (1 << 7) 149 150/* Control 3 Register */ 151#define DRV260X_LRA_OPEN_LOOP (1 << 0) 152#define DRV260X_ANALOG_IN (1 << 1) 153#define DRV260X_LRA_DRV_MODE (1 << 2) 154#define DRV260X_RTP_UNSIGNED_DATA (1 << 3) 155#define DRV260X_SUPPLY_COMP_DIS (1 << 4) 156#define DRV260X_ERM_OPEN_LOOP (1 << 5) 157#define DRV260X_NG_THRESH_0 (0 << 6) 158#define DRV260X_NG_THRESH_2 (1 << 6) 159#define DRV260X_NG_THRESH_4 (2 << 6) 160#define DRV260X_NG_THRESH_8 (3 << 6) 161 162/* Control 4 Register */ 163#define DRV260X_AUTOCAL_TIME_150MS (0 << 4) 164#define DRV260X_AUTOCAL_TIME_250MS (1 << 4) 165#define DRV260X_AUTOCAL_TIME_500MS (2 << 4) 166#define DRV260X_AUTOCAL_TIME_1000MS (3 << 4) 167 168/** 169 * struct drv260x_data - 170 * @input_dev: Pointer to the input device 171 * @client: Pointer to the I2C client 172 * @regmap: Register map of the device 173 * @work: Work item used to off load the enable/disable of the vibration 174 * @enable_gpio: Pointer to the gpio used for enable/disabling 175 * @regulator: Pointer to the regulator for the IC 176 * @magnitude: Magnitude of the vibration event 177 * @mode: The operating mode of the IC (LRA_NO_CAL, ERM or LRA) 178 * @library: The vibration library to be used 179 * @rated_voltage: The rated_voltage of the actuator 180 * @overdrive_voltage: The over drive voltage of the actuator 181**/ 182struct drv260x_data { 183 struct input_dev *input_dev; 184 struct i2c_client *client; 185 struct regmap *regmap; 186 struct work_struct work; 187 struct gpio_desc *enable_gpio; 188 struct regulator *regulator; 189 u8 magnitude; 190 u32 mode; 191 u32 library; 192 int rated_voltage; 193 int overdrive_voltage; 194}; 195 196#define DRV260X_DEF_RATED_VOLT 0x90 197#define DRV260X_DEF_OD_CLAMP_VOLT 0x90 198 199/* 200 * Rated and Overdriver Voltages: 201 * Calculated using the formula r = v * 255 / 5.6 202 * where r is what will be written to the register 203 * and v is the rated or overdriver voltage of the actuator 204 */ 205static int drv260x_calculate_voltage(unsigned int voltage) 206{ 207 return (voltage * 255 / 5600); 208} 209 210static void drv260x_worker(struct work_struct *work) 211{ 212 struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); 213 int error; 214 215 gpiod_set_value(haptics->enable_gpio, 1); 216 /* Data sheet says to wait 250us before trying to communicate */ 217 udelay(250); 218 219 error = regmap_write(haptics->regmap, 220 DRV260X_MODE, DRV260X_RT_PLAYBACK); 221 if (error) { 222 dev_err(&haptics->client->dev, 223 "Failed to write set mode: %d\n", error); 224 } else { 225 error = regmap_write(haptics->regmap, 226 DRV260X_RT_PB_IN, haptics->magnitude); 227 if (error) 228 dev_err(&haptics->client->dev, 229 "Failed to set magnitude: %d\n", error); 230 } 231} 232 233static int drv260x_haptics_play(struct input_dev *input, void *data, 234 struct ff_effect *effect) 235{ 236 struct drv260x_data *haptics = input_get_drvdata(input); 237 238 haptics->mode = DRV260X_LRA_NO_CAL_MODE; 239 240 /* Scale u16 magnitude into u8 register value */ 241 if (effect->u.rumble.strong_magnitude > 0) 242 haptics->magnitude = effect->u.rumble.strong_magnitude >> 8; 243 else if (effect->u.rumble.weak_magnitude > 0) 244 haptics->magnitude = effect->u.rumble.weak_magnitude >> 8; 245 else 246 haptics->magnitude = 0; 247 248 schedule_work(&haptics->work); 249 250 return 0; 251} 252 253static void drv260x_close(struct input_dev *input) 254{ 255 struct drv260x_data *haptics = input_get_drvdata(input); 256 int error; 257 258 cancel_work_sync(&haptics->work); 259 260 error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); 261 if (error) 262 dev_err(&haptics->client->dev, 263 "Failed to enter standby mode: %d\n", error); 264 265 gpiod_set_value(haptics->enable_gpio, 0); 266} 267 268static const struct reg_sequence drv260x_lra_cal_regs[] = { 269 { DRV260X_MODE, DRV260X_AUTO_CAL }, 270 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, 271 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 272 DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, 273}; 274 275static const struct reg_sequence drv260x_lra_init_regs[] = { 276 { DRV260X_MODE, DRV260X_RT_PLAYBACK }, 277 { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | 278 DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, 279 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 280 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 281 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 282 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 283 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 284 DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | 285 DRV260X_BEMF_GAIN_3 }, 286 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 287 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, 288 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA | DRV260X_ANALOG_IN }, 289 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 290}; 291 292static const struct reg_sequence drv260x_erm_cal_regs[] = { 293 { DRV260X_MODE, DRV260X_AUTO_CAL }, 294 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 295 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 296 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 297 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 298 { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | 299 DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, 300 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 301 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | 302 DRV260X_IDISS_TIME_75 }, 303 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, 304 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 305}; 306 307static int drv260x_init(struct drv260x_data *haptics) 308{ 309 int error; 310 unsigned int cal_buf; 311 312 error = regmap_write(haptics->regmap, 313 DRV260X_RATED_VOLT, haptics->rated_voltage); 314 if (error) { 315 dev_err(&haptics->client->dev, 316 "Failed to write DRV260X_RATED_VOLT register: %d\n", 317 error); 318 return error; 319 } 320 321 error = regmap_write(haptics->regmap, 322 DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); 323 if (error) { 324 dev_err(&haptics->client->dev, 325 "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n", 326 error); 327 return error; 328 } 329 330 switch (haptics->mode) { 331 case DRV260X_LRA_MODE: 332 error = regmap_register_patch(haptics->regmap, 333 drv260x_lra_cal_regs, 334 ARRAY_SIZE(drv260x_lra_cal_regs)); 335 if (error) { 336 dev_err(&haptics->client->dev, 337 "Failed to write LRA calibration registers: %d\n", 338 error); 339 return error; 340 } 341 342 break; 343 344 case DRV260X_ERM_MODE: 345 error = regmap_register_patch(haptics->regmap, 346 drv260x_erm_cal_regs, 347 ARRAY_SIZE(drv260x_erm_cal_regs)); 348 if (error) { 349 dev_err(&haptics->client->dev, 350 "Failed to write ERM calibration registers: %d\n", 351 error); 352 return error; 353 } 354 355 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 356 DRV260X_LIB_SEL_MASK, 357 haptics->library); 358 if (error) { 359 dev_err(&haptics->client->dev, 360 "Failed to write DRV260X_LIB_SEL register: %d\n", 361 error); 362 return error; 363 } 364 365 break; 366 367 default: 368 error = regmap_register_patch(haptics->regmap, 369 drv260x_lra_init_regs, 370 ARRAY_SIZE(drv260x_lra_init_regs)); 371 if (error) { 372 dev_err(&haptics->client->dev, 373 "Failed to write LRA init registers: %d\n", 374 error); 375 return error; 376 } 377 378 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 379 DRV260X_LIB_SEL_MASK, 380 haptics->library); 381 if (error) { 382 dev_err(&haptics->client->dev, 383 "Failed to write DRV260X_LIB_SEL register: %d\n", 384 error); 385 return error; 386 } 387 388 /* No need to set GO bit here */ 389 return 0; 390 } 391 392 error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); 393 if (error) { 394 dev_err(&haptics->client->dev, 395 "Failed to write GO register: %d\n", 396 error); 397 return error; 398 } 399 400 do { 401 usleep_range(15000, 15500); 402 error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); 403 if (error) { 404 dev_err(&haptics->client->dev, 405 "Failed to read GO register: %d\n", 406 error); 407 return error; 408 } 409 } while (cal_buf == DRV260X_GO_BIT); 410 411 return 0; 412} 413 414static const struct regmap_config drv260x_regmap_config = { 415 .reg_bits = 8, 416 .val_bits = 8, 417 418 .max_register = DRV260X_MAX_REG, 419 .cache_type = REGCACHE_NONE, 420}; 421 422static int drv260x_probe(struct i2c_client *client) 423{ 424 struct device *dev = &client->dev; 425 struct drv260x_data *haptics; 426 u32 voltage; 427 int error; 428 429 haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); 430 if (!haptics) 431 return -ENOMEM; 432 433 error = device_property_read_u32(dev, "mode", &haptics->mode); 434 if (error) { 435 dev_err(dev, "Can't fetch 'mode' property: %d\n", error); 436 return error; 437 } 438 439 if (haptics->mode < DRV260X_LRA_MODE || 440 haptics->mode > DRV260X_ERM_MODE) { 441 dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); 442 return -EINVAL; 443 } 444 445 error = device_property_read_u32(dev, "library-sel", &haptics->library); 446 if (error) { 447 dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error); 448 return error; 449 } 450 451 if (haptics->library < DRV260X_LIB_EMPTY || 452 haptics->library > DRV260X_ERM_LIB_F) { 453 dev_err(dev, 454 "Library value is invalid: %i\n", haptics->library); 455 return -EINVAL; 456 } 457 458 if (haptics->mode == DRV260X_LRA_MODE && 459 haptics->library != DRV260X_LIB_EMPTY && 460 haptics->library != DRV260X_LIB_LRA) { 461 dev_err(dev, "LRA Mode with ERM Library mismatch\n"); 462 return -EINVAL; 463 } 464 465 if (haptics->mode == DRV260X_ERM_MODE && 466 (haptics->library == DRV260X_LIB_EMPTY || 467 haptics->library == DRV260X_LIB_LRA)) { 468 dev_err(dev, "ERM Mode with LRA Library mismatch\n"); 469 return -EINVAL; 470 } 471 472 error = device_property_read_u32(dev, "vib-rated-mv", &voltage); 473 haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : 474 drv260x_calculate_voltage(voltage); 475 476 error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage); 477 haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : 478 drv260x_calculate_voltage(voltage); 479 480 haptics->regulator = devm_regulator_get(dev, "vbat"); 481 if (IS_ERR(haptics->regulator)) { 482 error = PTR_ERR(haptics->regulator); 483 dev_err(dev, "unable to get regulator, error: %d\n", error); 484 return error; 485 } 486 487 haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", 488 GPIOD_OUT_HIGH); 489 if (IS_ERR(haptics->enable_gpio)) 490 return PTR_ERR(haptics->enable_gpio); 491 492 haptics->input_dev = devm_input_allocate_device(dev); 493 if (!haptics->input_dev) { 494 dev_err(dev, "Failed to allocate input device\n"); 495 return -ENOMEM; 496 } 497 498 haptics->input_dev->name = "drv260x:haptics"; 499 haptics->input_dev->close = drv260x_close; 500 input_set_drvdata(haptics->input_dev, haptics); 501 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); 502 503 error = input_ff_create_memless(haptics->input_dev, NULL, 504 drv260x_haptics_play); 505 if (error) { 506 dev_err(dev, "input_ff_create() failed: %d\n", error); 507 return error; 508 } 509 510 INIT_WORK(&haptics->work, drv260x_worker); 511 512 haptics->client = client; 513 i2c_set_clientdata(client, haptics); 514 515 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); 516 if (IS_ERR(haptics->regmap)) { 517 error = PTR_ERR(haptics->regmap); 518 dev_err(dev, "Failed to allocate register map: %d\n", error); 519 return error; 520 } 521 522 error = drv260x_init(haptics); 523 if (error) { 524 dev_err(dev, "Device init failed: %d\n", error); 525 return error; 526 } 527 528 error = input_register_device(haptics->input_dev); 529 if (error) { 530 dev_err(dev, "couldn't register input device: %d\n", error); 531 return error; 532 } 533 534 return 0; 535} 536 537static int drv260x_suspend(struct device *dev) 538{ 539 struct drv260x_data *haptics = dev_get_drvdata(dev); 540 int ret = 0; 541 542 mutex_lock(&haptics->input_dev->mutex); 543 544 if (input_device_enabled(haptics->input_dev)) { 545 ret = regmap_update_bits(haptics->regmap, 546 DRV260X_MODE, 547 DRV260X_STANDBY_MASK, 548 DRV260X_STANDBY); 549 if (ret) { 550 dev_err(dev, "Failed to set standby mode\n"); 551 goto out; 552 } 553 554 gpiod_set_value(haptics->enable_gpio, 0); 555 556 ret = regulator_disable(haptics->regulator); 557 if (ret) { 558 dev_err(dev, "Failed to disable regulator\n"); 559 regmap_update_bits(haptics->regmap, 560 DRV260X_MODE, 561 DRV260X_STANDBY_MASK, 0); 562 } 563 } 564out: 565 mutex_unlock(&haptics->input_dev->mutex); 566 return ret; 567} 568 569static int drv260x_resume(struct device *dev) 570{ 571 struct drv260x_data *haptics = dev_get_drvdata(dev); 572 int ret = 0; 573 574 mutex_lock(&haptics->input_dev->mutex); 575 576 if (input_device_enabled(haptics->input_dev)) { 577 ret = regulator_enable(haptics->regulator); 578 if (ret) { 579 dev_err(dev, "Failed to enable regulator\n"); 580 goto out; 581 } 582 583 ret = regmap_update_bits(haptics->regmap, 584 DRV260X_MODE, 585 DRV260X_STANDBY_MASK, 0); 586 if (ret) { 587 dev_err(dev, "Failed to unset standby mode\n"); 588 regulator_disable(haptics->regulator); 589 goto out; 590 } 591 592 gpiod_set_value(haptics->enable_gpio, 1); 593 } 594 595out: 596 mutex_unlock(&haptics->input_dev->mutex); 597 return ret; 598} 599 600static DEFINE_SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 601 602static const struct i2c_device_id drv260x_id[] = { 603 { "drv2605l", 0 }, 604 { } 605}; 606MODULE_DEVICE_TABLE(i2c, drv260x_id); 607 608static const struct of_device_id drv260x_of_match[] = { 609 { .compatible = "ti,drv2604", }, 610 { .compatible = "ti,drv2604l", }, 611 { .compatible = "ti,drv2605", }, 612 { .compatible = "ti,drv2605l", }, 613 { } 614}; 615MODULE_DEVICE_TABLE(of, drv260x_of_match); 616 617static struct i2c_driver drv260x_driver = { 618 .probe = drv260x_probe, 619 .driver = { 620 .name = "drv260x-haptics", 621 .of_match_table = drv260x_of_match, 622 .pm = pm_sleep_ptr(&drv260x_pm_ops), 623 }, 624 .id_table = drv260x_id, 625}; 626module_i2c_driver(drv260x_driver); 627 628MODULE_DESCRIPTION("TI DRV260x haptics driver"); 629MODULE_LICENSE("GPL"); 630MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 631