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_ANANLOG_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 * @overdriver_voltage - The over drive voltage of the actuator 181 **/ 182 struct 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 u32 magnitude; 190 u32 mode; 191 u32 library; 192 int rated_voltage; 193 int overdrive_voltage; 194 }; 195 196 static const struct reg_default drv260x_reg_defs[] = { 197 { DRV260X_STATUS, 0xe0 }, 198 { DRV260X_MODE, 0x40 }, 199 { DRV260X_RT_PB_IN, 0x00 }, 200 { DRV260X_LIB_SEL, 0x00 }, 201 { DRV260X_WV_SEQ_1, 0x01 }, 202 { DRV260X_WV_SEQ_2, 0x00 }, 203 { DRV260X_WV_SEQ_3, 0x00 }, 204 { DRV260X_WV_SEQ_4, 0x00 }, 205 { DRV260X_WV_SEQ_5, 0x00 }, 206 { DRV260X_WV_SEQ_6, 0x00 }, 207 { DRV260X_WV_SEQ_7, 0x00 }, 208 { DRV260X_WV_SEQ_8, 0x00 }, 209 { DRV260X_GO, 0x00 }, 210 { DRV260X_OVERDRIVE_OFF, 0x00 }, 211 { DRV260X_SUSTAIN_P_OFF, 0x00 }, 212 { DRV260X_SUSTAIN_N_OFF, 0x00 }, 213 { DRV260X_BRAKE_OFF, 0x00 }, 214 { DRV260X_A_TO_V_CTRL, 0x05 }, 215 { DRV260X_A_TO_V_MIN_INPUT, 0x19 }, 216 { DRV260X_A_TO_V_MAX_INPUT, 0xff }, 217 { DRV260X_A_TO_V_MIN_OUT, 0x19 }, 218 { DRV260X_A_TO_V_MAX_OUT, 0xff }, 219 { DRV260X_RATED_VOLT, 0x3e }, 220 { DRV260X_OD_CLAMP_VOLT, 0x8c }, 221 { DRV260X_CAL_COMP, 0x0c }, 222 { DRV260X_CAL_BACK_EMF, 0x6c }, 223 { DRV260X_FEEDBACK_CTRL, 0x36 }, 224 { DRV260X_CTRL1, 0x93 }, 225 { DRV260X_CTRL2, 0xfa }, 226 { DRV260X_CTRL3, 0xa0 }, 227 { DRV260X_CTRL4, 0x20 }, 228 { DRV260X_CTRL5, 0x80 }, 229 { DRV260X_LRA_LOOP_PERIOD, 0x33 }, 230 { DRV260X_VBAT_MON, 0x00 }, 231 { DRV260X_LRA_RES_PERIOD, 0x00 }, 232 }; 233 234 #define DRV260X_DEF_RATED_VOLT 0x90 235 #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 236 237 /** 238 * Rated and Overdriver Voltages: 239 * Calculated using the formula r = v * 255 / 5.6 240 * where r is what will be written to the register 241 * and v is the rated or overdriver voltage of the actuator 242 **/ 243 static int drv260x_calculate_voltage(unsigned int voltage) 244 { 245 return (voltage * 255 / 5600); 246 } 247 248 static void drv260x_worker(struct work_struct *work) 249 { 250 struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); 251 int error; 252 253 gpiod_set_value(haptics->enable_gpio, 1); 254 /* Data sheet says to wait 250us before trying to communicate */ 255 udelay(250); 256 257 error = regmap_write(haptics->regmap, 258 DRV260X_MODE, DRV260X_RT_PLAYBACK); 259 if (error) { 260 dev_err(&haptics->client->dev, 261 "Failed to write set mode: %d\n", error); 262 } else { 263 error = regmap_write(haptics->regmap, 264 DRV260X_RT_PB_IN, haptics->magnitude); 265 if (error) 266 dev_err(&haptics->client->dev, 267 "Failed to set magnitude: %d\n", error); 268 } 269 } 270 271 static int drv260x_haptics_play(struct input_dev *input, void *data, 272 struct ff_effect *effect) 273 { 274 struct drv260x_data *haptics = input_get_drvdata(input); 275 276 haptics->mode = DRV260X_LRA_NO_CAL_MODE; 277 278 if (effect->u.rumble.strong_magnitude > 0) 279 haptics->magnitude = effect->u.rumble.strong_magnitude; 280 else if (effect->u.rumble.weak_magnitude > 0) 281 haptics->magnitude = effect->u.rumble.weak_magnitude; 282 else 283 haptics->magnitude = 0; 284 285 schedule_work(&haptics->work); 286 287 return 0; 288 } 289 290 static void drv260x_close(struct input_dev *input) 291 { 292 struct drv260x_data *haptics = input_get_drvdata(input); 293 int error; 294 295 cancel_work_sync(&haptics->work); 296 297 error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); 298 if (error) 299 dev_err(&haptics->client->dev, 300 "Failed to enter standby mode: %d\n", error); 301 302 gpiod_set_value(haptics->enable_gpio, 0); 303 } 304 305 static const struct reg_sequence drv260x_lra_cal_regs[] = { 306 { DRV260X_MODE, DRV260X_AUTO_CAL }, 307 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 }, 308 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 309 DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, 310 }; 311 312 static const struct reg_sequence drv260x_lra_init_regs[] = { 313 { DRV260X_MODE, DRV260X_RT_PLAYBACK }, 314 { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | 315 DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, 316 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 317 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 318 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 319 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 320 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | 321 DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | 322 DRV260X_BEMF_GAIN_3 }, 323 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 324 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, 325 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN }, 326 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 327 }; 328 329 static const struct reg_sequence drv260x_erm_cal_regs[] = { 330 { DRV260X_MODE, DRV260X_AUTO_CAL }, 331 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, 332 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, 333 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, 334 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, 335 { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | 336 DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, 337 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, 338 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | 339 DRV260X_IDISS_TIME_75 }, 340 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP }, 341 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, 342 }; 343 344 static int drv260x_init(struct drv260x_data *haptics) 345 { 346 int error; 347 unsigned int cal_buf; 348 349 error = regmap_write(haptics->regmap, 350 DRV260X_RATED_VOLT, haptics->rated_voltage); 351 if (error) { 352 dev_err(&haptics->client->dev, 353 "Failed to write DRV260X_RATED_VOLT register: %d\n", 354 error); 355 return error; 356 } 357 358 error = regmap_write(haptics->regmap, 359 DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); 360 if (error) { 361 dev_err(&haptics->client->dev, 362 "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n", 363 error); 364 return error; 365 } 366 367 switch (haptics->mode) { 368 case DRV260X_LRA_MODE: 369 error = regmap_register_patch(haptics->regmap, 370 drv260x_lra_cal_regs, 371 ARRAY_SIZE(drv260x_lra_cal_regs)); 372 if (error) { 373 dev_err(&haptics->client->dev, 374 "Failed to write LRA calibration registers: %d\n", 375 error); 376 return error; 377 } 378 379 break; 380 381 case DRV260X_ERM_MODE: 382 error = regmap_register_patch(haptics->regmap, 383 drv260x_erm_cal_regs, 384 ARRAY_SIZE(drv260x_erm_cal_regs)); 385 if (error) { 386 dev_err(&haptics->client->dev, 387 "Failed to write ERM calibration registers: %d\n", 388 error); 389 return error; 390 } 391 392 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 393 DRV260X_LIB_SEL_MASK, 394 haptics->library); 395 if (error) { 396 dev_err(&haptics->client->dev, 397 "Failed to write DRV260X_LIB_SEL register: %d\n", 398 error); 399 return error; 400 } 401 402 break; 403 404 default: 405 error = regmap_register_patch(haptics->regmap, 406 drv260x_lra_init_regs, 407 ARRAY_SIZE(drv260x_lra_init_regs)); 408 if (error) { 409 dev_err(&haptics->client->dev, 410 "Failed to write LRA init registers: %d\n", 411 error); 412 return error; 413 } 414 415 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, 416 DRV260X_LIB_SEL_MASK, 417 haptics->library); 418 if (error) { 419 dev_err(&haptics->client->dev, 420 "Failed to write DRV260X_LIB_SEL register: %d\n", 421 error); 422 return error; 423 } 424 425 /* No need to set GO bit here */ 426 return 0; 427 } 428 429 error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); 430 if (error) { 431 dev_err(&haptics->client->dev, 432 "Failed to write GO register: %d\n", 433 error); 434 return error; 435 } 436 437 do { 438 error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); 439 if (error) { 440 dev_err(&haptics->client->dev, 441 "Failed to read GO register: %d\n", 442 error); 443 return error; 444 } 445 } while (cal_buf == DRV260X_GO_BIT); 446 447 return 0; 448 } 449 450 static const struct regmap_config drv260x_regmap_config = { 451 .reg_bits = 8, 452 .val_bits = 8, 453 454 .max_register = DRV260X_MAX_REG, 455 .reg_defaults = drv260x_reg_defs, 456 .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs), 457 .cache_type = REGCACHE_NONE, 458 }; 459 460 static int drv260x_probe(struct i2c_client *client, 461 const struct i2c_device_id *id) 462 { 463 struct device *dev = &client->dev; 464 struct drv260x_data *haptics; 465 u32 voltage; 466 int error; 467 468 haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); 469 if (!haptics) 470 return -ENOMEM; 471 472 error = device_property_read_u32(dev, "mode", &haptics->mode); 473 if (error) { 474 dev_err(dev, "Can't fetch 'mode' property: %d\n", error); 475 return error; 476 } 477 478 if (haptics->mode < DRV260X_LRA_MODE || 479 haptics->mode > DRV260X_ERM_MODE) { 480 dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); 481 return -EINVAL; 482 } 483 484 error = device_property_read_u32(dev, "library-sel", &haptics->library); 485 if (error) { 486 dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error); 487 return error; 488 } 489 490 if (haptics->library < DRV260X_LIB_EMPTY || 491 haptics->library > DRV260X_ERM_LIB_F) { 492 dev_err(dev, 493 "Library value is invalid: %i\n", haptics->library); 494 return -EINVAL; 495 } 496 497 if (haptics->mode == DRV260X_LRA_MODE && 498 haptics->library != DRV260X_LIB_EMPTY && 499 haptics->library != DRV260X_LIB_LRA) { 500 dev_err(dev, "LRA Mode with ERM Library mismatch\n"); 501 return -EINVAL; 502 } 503 504 if (haptics->mode == DRV260X_ERM_MODE && 505 (haptics->library == DRV260X_LIB_EMPTY || 506 haptics->library == DRV260X_LIB_LRA)) { 507 dev_err(dev, "ERM Mode with LRA Library mismatch\n"); 508 return -EINVAL; 509 } 510 511 error = device_property_read_u32(dev, "vib-rated-mv", &voltage); 512 haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : 513 drv260x_calculate_voltage(voltage); 514 515 error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage); 516 haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : 517 drv260x_calculate_voltage(voltage); 518 519 haptics->regulator = devm_regulator_get(dev, "vbat"); 520 if (IS_ERR(haptics->regulator)) { 521 error = PTR_ERR(haptics->regulator); 522 dev_err(dev, "unable to get regulator, error: %d\n", error); 523 return error; 524 } 525 526 haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", 527 GPIOD_OUT_HIGH); 528 if (IS_ERR(haptics->enable_gpio)) 529 return PTR_ERR(haptics->enable_gpio); 530 531 haptics->input_dev = devm_input_allocate_device(dev); 532 if (!haptics->input_dev) { 533 dev_err(dev, "Failed to allocate input device\n"); 534 return -ENOMEM; 535 } 536 537 haptics->input_dev->name = "drv260x:haptics"; 538 haptics->input_dev->close = drv260x_close; 539 input_set_drvdata(haptics->input_dev, haptics); 540 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); 541 542 error = input_ff_create_memless(haptics->input_dev, NULL, 543 drv260x_haptics_play); 544 if (error) { 545 dev_err(dev, "input_ff_create() failed: %d\n", error); 546 return error; 547 } 548 549 INIT_WORK(&haptics->work, drv260x_worker); 550 551 haptics->client = client; 552 i2c_set_clientdata(client, haptics); 553 554 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); 555 if (IS_ERR(haptics->regmap)) { 556 error = PTR_ERR(haptics->regmap); 557 dev_err(dev, "Failed to allocate register map: %d\n", error); 558 return error; 559 } 560 561 error = drv260x_init(haptics); 562 if (error) { 563 dev_err(dev, "Device init failed: %d\n", error); 564 return error; 565 } 566 567 error = input_register_device(haptics->input_dev); 568 if (error) { 569 dev_err(dev, "couldn't register input device: %d\n", error); 570 return error; 571 } 572 573 return 0; 574 } 575 576 static int __maybe_unused drv260x_suspend(struct device *dev) 577 { 578 struct drv260x_data *haptics = dev_get_drvdata(dev); 579 int ret = 0; 580 581 mutex_lock(&haptics->input_dev->mutex); 582 583 if (haptics->input_dev->users) { 584 ret = regmap_update_bits(haptics->regmap, 585 DRV260X_MODE, 586 DRV260X_STANDBY_MASK, 587 DRV260X_STANDBY); 588 if (ret) { 589 dev_err(dev, "Failed to set standby mode\n"); 590 goto out; 591 } 592 593 gpiod_set_value(haptics->enable_gpio, 0); 594 595 ret = regulator_disable(haptics->regulator); 596 if (ret) { 597 dev_err(dev, "Failed to disable regulator\n"); 598 regmap_update_bits(haptics->regmap, 599 DRV260X_MODE, 600 DRV260X_STANDBY_MASK, 0); 601 } 602 } 603 out: 604 mutex_unlock(&haptics->input_dev->mutex); 605 return ret; 606 } 607 608 static int __maybe_unused drv260x_resume(struct device *dev) 609 { 610 struct drv260x_data *haptics = dev_get_drvdata(dev); 611 int ret = 0; 612 613 mutex_lock(&haptics->input_dev->mutex); 614 615 if (haptics->input_dev->users) { 616 ret = regulator_enable(haptics->regulator); 617 if (ret) { 618 dev_err(dev, "Failed to enable regulator\n"); 619 goto out; 620 } 621 622 ret = regmap_update_bits(haptics->regmap, 623 DRV260X_MODE, 624 DRV260X_STANDBY_MASK, 0); 625 if (ret) { 626 dev_err(dev, "Failed to unset standby mode\n"); 627 regulator_disable(haptics->regulator); 628 goto out; 629 } 630 631 gpiod_set_value(haptics->enable_gpio, 1); 632 } 633 634 out: 635 mutex_unlock(&haptics->input_dev->mutex); 636 return ret; 637 } 638 639 static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 640 641 static const struct i2c_device_id drv260x_id[] = { 642 { "drv2605l", 0 }, 643 { } 644 }; 645 MODULE_DEVICE_TABLE(i2c, drv260x_id); 646 647 static const struct of_device_id drv260x_of_match[] = { 648 { .compatible = "ti,drv2604", }, 649 { .compatible = "ti,drv2604l", }, 650 { .compatible = "ti,drv2605", }, 651 { .compatible = "ti,drv2605l", }, 652 { } 653 }; 654 MODULE_DEVICE_TABLE(of, drv260x_of_match); 655 656 static struct i2c_driver drv260x_driver = { 657 .probe = drv260x_probe, 658 .driver = { 659 .name = "drv260x-haptics", 660 .of_match_table = drv260x_of_match, 661 .pm = &drv260x_pm_ops, 662 }, 663 .id_table = drv260x_id, 664 }; 665 module_i2c_driver(drv260x_driver); 666 667 MODULE_DESCRIPTION("TI DRV260x haptics driver"); 668 MODULE_LICENSE("GPL"); 669 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 670