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/acpi.h> 11 #include <linux/delay.h> 12 #include <linux/device/devres.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/i2c.h> 15 #include <linux/input.h> 16 #include <linux/module.h> 17 #include <linux/regmap.h> 18 #include <linux/regulator/consumer.h> 19 #include <linux/slab.h> 20 21 #include <dt-bindings/input/ti-drv260x.h> 22 23 #define DRV260X_STATUS 0x0 24 #define DRV260X_MODE 0x1 25 #define DRV260X_RT_PB_IN 0x2 26 #define DRV260X_LIB_SEL 0x3 27 #define DRV260X_WV_SEQ_1 0x4 28 #define DRV260X_WV_SEQ_2 0x5 29 #define DRV260X_WV_SEQ_3 0x6 30 #define DRV260X_WV_SEQ_4 0x7 31 #define DRV260X_WV_SEQ_5 0x8 32 #define DRV260X_WV_SEQ_6 0x9 33 #define DRV260X_WV_SEQ_7 0xa 34 #define DRV260X_WV_SEQ_8 0xb 35 #define DRV260X_GO 0xc 36 #define DRV260X_OVERDRIVE_OFF 0xd 37 #define DRV260X_SUSTAIN_P_OFF 0xe 38 #define DRV260X_SUSTAIN_N_OFF 0xf 39 #define DRV260X_BRAKE_OFF 0x10 40 #define DRV260X_A_TO_V_CTRL 0x11 41 #define DRV260X_A_TO_V_MIN_INPUT 0x12 42 #define DRV260X_A_TO_V_MAX_INPUT 0x13 43 #define DRV260X_A_TO_V_MIN_OUT 0x14 44 #define DRV260X_A_TO_V_MAX_OUT 0x15 45 #define DRV260X_RATED_VOLT 0x16 46 #define DRV260X_OD_CLAMP_VOLT 0x17 47 #define DRV260X_CAL_COMP 0x18 48 #define DRV260X_CAL_BACK_EMF 0x19 49 #define DRV260X_FEEDBACK_CTRL 0x1a 50 #define DRV260X_CTRL1 0x1b 51 #define DRV260X_CTRL2 0x1c 52 #define DRV260X_CTRL3 0x1d 53 #define DRV260X_CTRL4 0x1e 54 #define DRV260X_CTRL5 0x1f 55 #define DRV260X_LRA_LOOP_PERIOD 0x20 56 #define DRV260X_VBAT_MON 0x21 57 #define DRV260X_LRA_RES_PERIOD 0x22 58 #define DRV260X_MAX_REG 0x23 59 60 #define DRV260X_GO_BIT 0x01 61 62 /* Library Selection */ 63 #define DRV260X_LIB_SEL_MASK 0x07 64 #define DRV260X_LIB_SEL_RAM 0x0 65 #define DRV260X_LIB_SEL_OD 0x1 66 #define DRV260X_LIB_SEL_40_60 0x2 67 #define DRV260X_LIB_SEL_60_80 0x3 68 #define DRV260X_LIB_SEL_100_140 0x4 69 #define DRV260X_LIB_SEL_140_PLUS 0x5 70 71 #define DRV260X_LIB_SEL_HIZ_MASK 0x10 72 #define DRV260X_LIB_SEL_HIZ_EN 0x01 73 #define DRV260X_LIB_SEL_HIZ_DIS 0 74 75 /* Mode register */ 76 #define DRV260X_STANDBY (1 << 6) 77 #define DRV260X_STANDBY_MASK 0x40 78 #define DRV260X_INTERNAL_TRIGGER 0x00 79 #define DRV260X_EXT_TRIGGER_EDGE 0x01 80 #define DRV260X_EXT_TRIGGER_LEVEL 0x02 81 #define DRV260X_PWM_ANALOG_IN 0x03 82 #define DRV260X_AUDIOHAPTIC 0x04 83 #define DRV260X_RT_PLAYBACK 0x05 84 #define DRV260X_DIAGNOSTICS 0x06 85 #define DRV260X_AUTO_CAL 0x07 86 87 /* Audio to Haptics Control */ 88 #define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2) 89 #define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2) 90 #define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2) 91 #define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2) 92 93 #define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00 94 #define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01 95 #define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02 96 #define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03 97 98 /* Min/Max Input/Output Voltages */ 99 #define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19 100 #define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64 101 #define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19 102 #define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF 103 104 /* Feedback register */ 105 #define DRV260X_FB_REG_ERM_MODE 0x7f 106 #define DRV260X_FB_REG_LRA_MODE (1 << 7) 107 108 #define DRV260X_BRAKE_FACTOR_MASK 0x1f 109 #define DRV260X_BRAKE_FACTOR_2X (1 << 0) 110 #define DRV260X_BRAKE_FACTOR_3X (2 << 4) 111 #define DRV260X_BRAKE_FACTOR_4X (3 << 4) 112 #define DRV260X_BRAKE_FACTOR_6X (4 << 4) 113 #define DRV260X_BRAKE_FACTOR_8X (5 << 4) 114 #define DRV260X_BRAKE_FACTOR_16 (6 << 4) 115 #define DRV260X_BRAKE_FACTOR_DIS (7 << 4) 116 117 #define DRV260X_LOOP_GAIN_LOW 0xf3 118 #define DRV260X_LOOP_GAIN_MED (1 << 2) 119 #define DRV260X_LOOP_GAIN_HIGH (2 << 2) 120 #define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2) 121 122 #define DRV260X_BEMF_GAIN_0 0xfc 123 #define DRV260X_BEMF_GAIN_1 (1 << 0) 124 #define DRV260X_BEMF_GAIN_2 (2 << 0) 125 #define DRV260X_BEMF_GAIN_3 (3 << 0) 126 127 /* Control 1 register */ 128 #define DRV260X_AC_CPLE_EN (1 << 5) 129 #define DRV260X_STARTUP_BOOST (1 << 7) 130 131 /* Control 2 register */ 132 133 #define DRV260X_IDISS_TIME_45 0 134 #define DRV260X_IDISS_TIME_75 (1 << 0) 135 #define DRV260X_IDISS_TIME_150 (1 << 1) 136 #define DRV260X_IDISS_TIME_225 0x03 137 138 #define DRV260X_BLANK_TIME_45 (0 << 2) 139 #define DRV260X_BLANK_TIME_75 (1 << 2) 140 #define DRV260X_BLANK_TIME_150 (2 << 2) 141 #define DRV260X_BLANK_TIME_225 (3 << 2) 142 143 #define DRV260X_SAMP_TIME_150 (0 << 4) 144 #define DRV260X_SAMP_TIME_200 (1 << 4) 145 #define DRV260X_SAMP_TIME_250 (2 << 4) 146 #define DRV260X_SAMP_TIME_300 (3 << 4) 147 148 #define DRV260X_BRAKE_STABILIZER (1 << 6) 149 #define DRV260X_UNIDIR_IN (0 << 7) 150 #define DRV260X_BIDIR_IN (1 << 7) 151 152 /* Control 3 Register */ 153 #define DRV260X_LRA_OPEN_LOOP (1 << 0) 154 #define DRV260X_ANALOG_IN (1 << 1) 155 #define DRV260X_LRA_DRV_MODE (1 << 2) 156 #define DRV260X_RTP_UNSIGNED_DATA (1 << 3) 157 #define DRV260X_SUPPLY_COMP_DIS (1 << 4) 158 #define DRV260X_ERM_OPEN_LOOP (1 << 5) 159 #define DRV260X_NG_THRESH_0 (0 << 6) 160 #define DRV260X_NG_THRESH_2 (1 << 6) 161 #define DRV260X_NG_THRESH_4 (2 << 6) 162 #define DRV260X_NG_THRESH_8 (3 << 6) 163 164 /* Control 4 Register */ 165 #define DRV260X_AUTOCAL_TIME_150MS (0 << 4) 166 #define DRV260X_AUTOCAL_TIME_250MS (1 << 4) 167 #define DRV260X_AUTOCAL_TIME_500MS (2 << 4) 168 #define DRV260X_AUTOCAL_TIME_1000MS (3 << 4) 169 170 /* 171 * Timeout for waiting for the GO status bit, in seconds. Should be reasonably 172 * large to wait for a auto-calibration cycle completion. 173 */ 174 #define DRV260X_GO_TIMEOUT_S 5 175 176 /** 177 * struct drv260x_data - 178 * @input_dev: Pointer to the input device 179 * @client: Pointer to the I2C client 180 * @regmap: Register map of the device 181 * @work: Work item used to off load the enable/disable of the vibration 182 * @enable_gpio: Pointer to the gpio used for enable/disabling 183 * @regulator: Pointer to the regulator for the IC 184 * @magnitude: Magnitude of the vibration event 185 * @mode: The operating mode of the IC (LRA_NO_CAL, ERM or LRA) 186 * @library: The vibration library to be used 187 * @rated_voltage: The rated_voltage of the actuator 188 * @overdrive_voltage: The over drive voltage of the actuator 189 **/ 190 struct drv260x_data { 191 struct input_dev *input_dev; 192 struct i2c_client *client; 193 struct regmap *regmap; 194 struct work_struct work; 195 struct gpio_desc *enable_gpio; 196 struct regulator *regulator; 197 u8 magnitude; 198 u32 mode; 199 u32 library; 200 int rated_voltage; 201 int overdrive_voltage; 202 }; 203 204 #define DRV260X_DEF_RATED_VOLT 0x90 205 #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 206 207 /* 208 * Rated and Overdriver Voltages: 209 * Calculated using the formula r = v * 255 / 5.6 210 * where r is what will be written to the register 211 * and v is the rated or overdriver voltage of the actuator 212 */ 213 static int drv260x_calculate_voltage(unsigned int voltage) 214 { 215 return (voltage * 255 / 5600); 216 } 217 218 static void drv260x_worker(struct work_struct *work) 219 { 220 struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); 221 int error; 222 223 gpiod_set_value(haptics->enable_gpio, 1); 224 /* Data sheet says to wait 250us before trying to communicate */ 225 udelay(250); 226 227 error = regmap_write(haptics->regmap, 228 DRV260X_MODE, DRV260X_RT_PLAYBACK); 229 if (error) { 230 dev_err(&haptics->client->dev, 231 "Failed to write set mode: %d\n", error); 232 } else { 233 error = regmap_write(haptics->regmap, 234 DRV260X_RT_PB_IN, haptics->magnitude); 235 if (error) 236 dev_err(&haptics->client->dev, 237 "Failed to set magnitude: %d\n", error); 238 } 239 } 240 241 static int drv260x_haptics_play(struct input_dev *input, void *data, 242 struct ff_effect *effect) 243 { 244 struct drv260x_data *haptics = input_get_drvdata(input); 245 246 haptics->mode = DRV260X_LRA_NO_CAL_MODE; 247 248 /* Scale u16 magnitude into u8 register value */ 249 if (effect->u.rumble.strong_magnitude > 0) 250 haptics->magnitude = effect->u.rumble.strong_magnitude >> 8; 251 else if (effect->u.rumble.weak_magnitude > 0) 252 haptics->magnitude = effect->u.rumble.weak_magnitude >> 8; 253 else 254 haptics->magnitude = 0; 255 256 schedule_work(&haptics->work); 257 258 return 0; 259 } 260 261 static void drv260x_close(struct input_dev *input) 262 { 263 struct drv260x_data *haptics = input_get_drvdata(input); 264 int error; 265 266 cancel_work_sync(&haptics->work); 267 268 error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); 269 if (error) 270 dev_err(&haptics->client->dev, 271 "Failed to enter standby mode: %d\n", error); 272 273 gpiod_set_value(haptics->enable_gpio, 0); 274 } 275 276 static const struct reg_sequence drv260x_lra_cal_regs[] = { 277 { DRV260X_MODE, DRV260X_AUTO_CAL }, 278 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, 279 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 280 DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, 281 }; 282 283 static const struct reg_sequence drv260x_lra_init_regs[] = { 284 { DRV260X_MODE, DRV260X_RT_PLAYBACK }, 285 { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | 286 DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, 287 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 288 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 289 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 290 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 291 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 292 DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | 293 DRV260X_BEMF_GAIN_3 }, 294 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 295 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, 296 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA | DRV260X_ANALOG_IN }, 297 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 298 }; 299 300 static const struct reg_sequence drv260x_erm_cal_regs[] = { 301 { DRV260X_MODE, DRV260X_AUTO_CAL }, 302 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 303 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 304 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 305 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 306 { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | 307 DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, 308 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 309 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | 310 DRV260X_IDISS_TIME_75 }, 311 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, 312 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 313 }; 314 315 static int drv260x_init(struct drv260x_data *haptics) 316 { 317 int error; 318 unsigned int cal_buf; 319 unsigned long timeout; 320 321 error = regmap_write(haptics->regmap, 322 DRV260X_RATED_VOLT, haptics->rated_voltage); 323 if (error) { 324 dev_err(&haptics->client->dev, 325 "Failed to write DRV260X_RATED_VOLT register: %d\n", 326 error); 327 return error; 328 } 329 330 error = regmap_write(haptics->regmap, 331 DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); 332 if (error) { 333 dev_err(&haptics->client->dev, 334 "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n", 335 error); 336 return error; 337 } 338 339 switch (haptics->mode) { 340 case DRV260X_LRA_MODE: 341 error = regmap_register_patch(haptics->regmap, 342 drv260x_lra_cal_regs, 343 ARRAY_SIZE(drv260x_lra_cal_regs)); 344 if (error) { 345 dev_err(&haptics->client->dev, 346 "Failed to write LRA calibration registers: %d\n", 347 error); 348 return error; 349 } 350 351 break; 352 353 case DRV260X_ERM_MODE: 354 error = regmap_register_patch(haptics->regmap, 355 drv260x_erm_cal_regs, 356 ARRAY_SIZE(drv260x_erm_cal_regs)); 357 if (error) { 358 dev_err(&haptics->client->dev, 359 "Failed to write ERM calibration registers: %d\n", 360 error); 361 return error; 362 } 363 364 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 365 DRV260X_LIB_SEL_MASK, 366 haptics->library); 367 if (error) { 368 dev_err(&haptics->client->dev, 369 "Failed to write DRV260X_LIB_SEL register: %d\n", 370 error); 371 return error; 372 } 373 374 break; 375 376 default: 377 error = regmap_register_patch(haptics->regmap, 378 drv260x_lra_init_regs, 379 ARRAY_SIZE(drv260x_lra_init_regs)); 380 if (error) { 381 dev_err(&haptics->client->dev, 382 "Failed to write LRA init registers: %d\n", 383 error); 384 return error; 385 } 386 387 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 388 DRV260X_LIB_SEL_MASK, 389 haptics->library); 390 if (error) { 391 dev_err(&haptics->client->dev, 392 "Failed to write DRV260X_LIB_SEL register: %d\n", 393 error); 394 return error; 395 } 396 397 /* No need to set GO bit here */ 398 return 0; 399 } 400 401 error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); 402 if (error) { 403 dev_err(&haptics->client->dev, 404 "Failed to write GO register: %d\n", 405 error); 406 return error; 407 } 408 409 timeout = jiffies + DRV260X_GO_TIMEOUT_S * HZ; 410 do { 411 usleep_range(15000, 15500); 412 error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); 413 if (error) { 414 dev_err(&haptics->client->dev, 415 "Failed to read GO register: %d\n", 416 error); 417 return error; 418 } 419 if (time_after(jiffies, timeout)) { 420 dev_err(&haptics->client->dev, 421 "Calibration timeout. The device cannot be used.\n"); 422 return -ETIMEDOUT; 423 } 424 } while (cal_buf == DRV260X_GO_BIT); 425 426 return 0; 427 } 428 429 static const struct regmap_config drv260x_regmap_config = { 430 .reg_bits = 8, 431 .val_bits = 8, 432 433 .max_register = DRV260X_MAX_REG, 434 .cache_type = REGCACHE_NONE, 435 }; 436 437 static void drv260x_power_off(void *data) 438 { 439 struct drv260x_data *haptics = data; 440 441 regulator_disable(haptics->regulator); 442 } 443 444 static int drv260x_probe(struct i2c_client *client) 445 { 446 struct device *dev = &client->dev; 447 struct drv260x_data *haptics; 448 u32 voltage; 449 int error; 450 451 haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); 452 if (!haptics) 453 return -ENOMEM; 454 455 error = device_property_read_u32(dev, "mode", &haptics->mode); 456 if (error) { 457 dev_err(dev, "Can't fetch 'mode' property: %d\n", error); 458 return error; 459 } 460 461 if (haptics->mode < DRV260X_LRA_MODE || 462 haptics->mode > DRV260X_ERM_MODE) { 463 dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); 464 return -EINVAL; 465 } 466 467 error = device_property_read_u32(dev, "library-sel", &haptics->library); 468 if (error) { 469 dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error); 470 return error; 471 } 472 473 if (haptics->library < DRV260X_LIB_EMPTY || 474 haptics->library > DRV260X_ERM_LIB_F) { 475 dev_err(dev, 476 "Library value is invalid: %i\n", haptics->library); 477 return -EINVAL; 478 } 479 480 if (haptics->mode == DRV260X_LRA_MODE && 481 haptics->library != DRV260X_LIB_EMPTY && 482 haptics->library != DRV260X_LIB_LRA) { 483 dev_err(dev, "LRA Mode with ERM Library mismatch\n"); 484 return -EINVAL; 485 } 486 487 if (haptics->mode == DRV260X_ERM_MODE && 488 (haptics->library == DRV260X_LIB_EMPTY || 489 haptics->library == DRV260X_LIB_LRA)) { 490 dev_err(dev, "ERM Mode with LRA Library mismatch\n"); 491 return -EINVAL; 492 } 493 494 error = device_property_read_u32(dev, "vib-rated-mv", &voltage); 495 haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : 496 drv260x_calculate_voltage(voltage); 497 498 error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage); 499 haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : 500 drv260x_calculate_voltage(voltage); 501 502 haptics->regulator = devm_regulator_get(dev, "vbat"); 503 if (IS_ERR(haptics->regulator)) { 504 error = PTR_ERR(haptics->regulator); 505 dev_err(dev, "unable to get regulator, error: %d\n", error); 506 return error; 507 } 508 509 error = regulator_enable(haptics->regulator); 510 if (error) { 511 dev_err(dev, "Failed to enable regulator: %d\n", error); 512 return error; 513 } 514 515 error = devm_add_action_or_reset(dev, drv260x_power_off, haptics); 516 if (error) 517 return error; 518 519 haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", 520 GPIOD_OUT_HIGH); 521 if (IS_ERR(haptics->enable_gpio)) 522 return PTR_ERR(haptics->enable_gpio); 523 524 haptics->input_dev = devm_input_allocate_device(dev); 525 if (!haptics->input_dev) { 526 dev_err(dev, "Failed to allocate input device\n"); 527 return -ENOMEM; 528 } 529 530 haptics->input_dev->name = "drv260x:haptics"; 531 haptics->input_dev->close = drv260x_close; 532 input_set_drvdata(haptics->input_dev, haptics); 533 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); 534 535 error = input_ff_create_memless(haptics->input_dev, NULL, 536 drv260x_haptics_play); 537 if (error) { 538 dev_err(dev, "input_ff_create() failed: %d\n", error); 539 return error; 540 } 541 542 INIT_WORK(&haptics->work, drv260x_worker); 543 544 haptics->client = client; 545 i2c_set_clientdata(client, haptics); 546 547 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); 548 if (IS_ERR(haptics->regmap)) { 549 error = PTR_ERR(haptics->regmap); 550 dev_err(dev, "Failed to allocate register map: %d\n", error); 551 return error; 552 } 553 554 error = drv260x_init(haptics); 555 if (error) { 556 dev_err(dev, "Device init failed: %d\n", error); 557 return error; 558 } 559 560 error = input_register_device(haptics->input_dev); 561 if (error) { 562 dev_err(dev, "couldn't register input device: %d\n", error); 563 return error; 564 } 565 566 return 0; 567 } 568 569 static int drv260x_suspend(struct device *dev) 570 { 571 struct drv260x_data *haptics = dev_get_drvdata(dev); 572 int error; 573 574 guard(mutex)(&haptics->input_dev->mutex); 575 576 if (input_device_enabled(haptics->input_dev)) { 577 error = regmap_update_bits(haptics->regmap, 578 DRV260X_MODE, 579 DRV260X_STANDBY_MASK, 580 DRV260X_STANDBY); 581 if (error) { 582 dev_err(dev, "Failed to set standby mode\n"); 583 return error; 584 } 585 586 gpiod_set_value(haptics->enable_gpio, 0); 587 588 error = regulator_disable(haptics->regulator); 589 if (error) { 590 dev_err(dev, "Failed to disable regulator\n"); 591 regmap_update_bits(haptics->regmap, 592 DRV260X_MODE, 593 DRV260X_STANDBY_MASK, 0); 594 return error; 595 } 596 } 597 598 return 0; 599 } 600 601 static int drv260x_resume(struct device *dev) 602 { 603 struct drv260x_data *haptics = dev_get_drvdata(dev); 604 int error; 605 606 guard(mutex)(&haptics->input_dev->mutex); 607 608 if (input_device_enabled(haptics->input_dev)) { 609 error = regulator_enable(haptics->regulator); 610 if (error) { 611 dev_err(dev, "Failed to enable regulator\n"); 612 return error; 613 } 614 615 error = regmap_update_bits(haptics->regmap, 616 DRV260X_MODE, 617 DRV260X_STANDBY_MASK, 0); 618 if (error) { 619 dev_err(dev, "Failed to unset standby mode\n"); 620 regulator_disable(haptics->regulator); 621 return error; 622 } 623 624 gpiod_set_value(haptics->enable_gpio, 1); 625 } 626 627 return 0; 628 } 629 630 static DEFINE_SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 631 632 static const struct i2c_device_id drv260x_id[] = { 633 { "drv2604" }, 634 { "drv2604l" }, 635 { "drv2605" }, 636 { "drv2605l" }, 637 { } 638 }; 639 MODULE_DEVICE_TABLE(i2c, drv260x_id); 640 641 #ifdef CONFIG_ACPI 642 static const struct acpi_device_id drv260x_acpi_match[] = { 643 { "DRV2604" }, 644 { } 645 }; 646 MODULE_DEVICE_TABLE(acpi, drv260x_acpi_match); 647 #endif 648 649 static const struct of_device_id drv260x_of_match[] = { 650 { .compatible = "ti,drv2604", }, 651 { .compatible = "ti,drv2604l", }, 652 { .compatible = "ti,drv2605", }, 653 { .compatible = "ti,drv2605l", }, 654 { } 655 }; 656 MODULE_DEVICE_TABLE(of, drv260x_of_match); 657 658 static struct i2c_driver drv260x_driver = { 659 .probe = drv260x_probe, 660 .driver = { 661 .name = "drv260x-haptics", 662 .acpi_match_table = ACPI_PTR(drv260x_acpi_match), 663 .of_match_table = drv260x_of_match, 664 .pm = pm_sleep_ptr(&drv260x_pm_ops), 665 }, 666 .id_table = drv260x_id, 667 }; 668 module_i2c_driver(drv260x_driver); 669 670 MODULE_DESCRIPTION("TI DRV260x haptics driver"); 671 MODULE_LICENSE("GPL"); 672 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 673