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**/ 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 u32 magnitude; 190 u32 mode; 191 u32 library; 192 int rated_voltage; 193 int overdrive_voltage; 194}; 195 196static 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 **/ 243static int drv260x_calculate_voltage(unsigned int voltage) 244{ 245 return (voltage * 255 / 5600); 246} 247 248static 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 271static 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 290static 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 305static 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 312static 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 329static 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 344static 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 usleep_range(15000, 15500); 439 error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); 440 if (error) { 441 dev_err(&haptics->client->dev, 442 "Failed to read GO register: %d\n", 443 error); 444 return error; 445 } 446 } while (cal_buf == DRV260X_GO_BIT); 447 448 return 0; 449} 450 451static const struct regmap_config drv260x_regmap_config = { 452 .reg_bits = 8, 453 .val_bits = 8, 454 455 .max_register = DRV260X_MAX_REG, 456 .reg_defaults = drv260x_reg_defs, 457 .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs), 458 .cache_type = REGCACHE_NONE, 459}; 460 461static int drv260x_probe(struct i2c_client *client, 462 const struct i2c_device_id *id) 463{ 464 struct device *dev = &client->dev; 465 struct drv260x_data *haptics; 466 u32 voltage; 467 int error; 468 469 haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); 470 if (!haptics) 471 return -ENOMEM; 472 473 error = device_property_read_u32(dev, "mode", &haptics->mode); 474 if (error) { 475 dev_err(dev, "Can't fetch 'mode' property: %d\n", error); 476 return error; 477 } 478 479 if (haptics->mode < DRV260X_LRA_MODE || 480 haptics->mode > DRV260X_ERM_MODE) { 481 dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); 482 return -EINVAL; 483 } 484 485 error = device_property_read_u32(dev, "library-sel", &haptics->library); 486 if (error) { 487 dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error); 488 return error; 489 } 490 491 if (haptics->library < DRV260X_LIB_EMPTY || 492 haptics->library > DRV260X_ERM_LIB_F) { 493 dev_err(dev, 494 "Library value is invalid: %i\n", haptics->library); 495 return -EINVAL; 496 } 497 498 if (haptics->mode == DRV260X_LRA_MODE && 499 haptics->library != DRV260X_LIB_EMPTY && 500 haptics->library != DRV260X_LIB_LRA) { 501 dev_err(dev, "LRA Mode with ERM Library mismatch\n"); 502 return -EINVAL; 503 } 504 505 if (haptics->mode == DRV260X_ERM_MODE && 506 (haptics->library == DRV260X_LIB_EMPTY || 507 haptics->library == DRV260X_LIB_LRA)) { 508 dev_err(dev, "ERM Mode with LRA Library mismatch\n"); 509 return -EINVAL; 510 } 511 512 error = device_property_read_u32(dev, "vib-rated-mv", &voltage); 513 haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : 514 drv260x_calculate_voltage(voltage); 515 516 error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage); 517 haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : 518 drv260x_calculate_voltage(voltage); 519 520 haptics->regulator = devm_regulator_get(dev, "vbat"); 521 if (IS_ERR(haptics->regulator)) { 522 error = PTR_ERR(haptics->regulator); 523 dev_err(dev, "unable to get regulator, error: %d\n", error); 524 return error; 525 } 526 527 haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", 528 GPIOD_OUT_HIGH); 529 if (IS_ERR(haptics->enable_gpio)) 530 return PTR_ERR(haptics->enable_gpio); 531 532 haptics->input_dev = devm_input_allocate_device(dev); 533 if (!haptics->input_dev) { 534 dev_err(dev, "Failed to allocate input device\n"); 535 return -ENOMEM; 536 } 537 538 haptics->input_dev->name = "drv260x:haptics"; 539 haptics->input_dev->close = drv260x_close; 540 input_set_drvdata(haptics->input_dev, haptics); 541 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); 542 543 error = input_ff_create_memless(haptics->input_dev, NULL, 544 drv260x_haptics_play); 545 if (error) { 546 dev_err(dev, "input_ff_create() failed: %d\n", error); 547 return error; 548 } 549 550 INIT_WORK(&haptics->work, drv260x_worker); 551 552 haptics->client = client; 553 i2c_set_clientdata(client, haptics); 554 555 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); 556 if (IS_ERR(haptics->regmap)) { 557 error = PTR_ERR(haptics->regmap); 558 dev_err(dev, "Failed to allocate register map: %d\n", error); 559 return error; 560 } 561 562 error = drv260x_init(haptics); 563 if (error) { 564 dev_err(dev, "Device init failed: %d\n", error); 565 return error; 566 } 567 568 error = input_register_device(haptics->input_dev); 569 if (error) { 570 dev_err(dev, "couldn't register input device: %d\n", error); 571 return error; 572 } 573 574 return 0; 575} 576 577static int __maybe_unused drv260x_suspend(struct device *dev) 578{ 579 struct drv260x_data *haptics = dev_get_drvdata(dev); 580 int ret = 0; 581 582 mutex_lock(&haptics->input_dev->mutex); 583 584 if (haptics->input_dev->users) { 585 ret = regmap_update_bits(haptics->regmap, 586 DRV260X_MODE, 587 DRV260X_STANDBY_MASK, 588 DRV260X_STANDBY); 589 if (ret) { 590 dev_err(dev, "Failed to set standby mode\n"); 591 goto out; 592 } 593 594 gpiod_set_value(haptics->enable_gpio, 0); 595 596 ret = regulator_disable(haptics->regulator); 597 if (ret) { 598 dev_err(dev, "Failed to disable regulator\n"); 599 regmap_update_bits(haptics->regmap, 600 DRV260X_MODE, 601 DRV260X_STANDBY_MASK, 0); 602 } 603 } 604out: 605 mutex_unlock(&haptics->input_dev->mutex); 606 return ret; 607} 608 609static int __maybe_unused drv260x_resume(struct device *dev) 610{ 611 struct drv260x_data *haptics = dev_get_drvdata(dev); 612 int ret = 0; 613 614 mutex_lock(&haptics->input_dev->mutex); 615 616 if (haptics->input_dev->users) { 617 ret = regulator_enable(haptics->regulator); 618 if (ret) { 619 dev_err(dev, "Failed to enable regulator\n"); 620 goto out; 621 } 622 623 ret = regmap_update_bits(haptics->regmap, 624 DRV260X_MODE, 625 DRV260X_STANDBY_MASK, 0); 626 if (ret) { 627 dev_err(dev, "Failed to unset standby mode\n"); 628 regulator_disable(haptics->regulator); 629 goto out; 630 } 631 632 gpiod_set_value(haptics->enable_gpio, 1); 633 } 634 635out: 636 mutex_unlock(&haptics->input_dev->mutex); 637 return ret; 638} 639 640static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); 641 642static const struct i2c_device_id drv260x_id[] = { 643 { "drv2605l", 0 }, 644 { } 645}; 646MODULE_DEVICE_TABLE(i2c, drv260x_id); 647 648static const struct of_device_id drv260x_of_match[] = { 649 { .compatible = "ti,drv2604", }, 650 { .compatible = "ti,drv2604l", }, 651 { .compatible = "ti,drv2605", }, 652 { .compatible = "ti,drv2605l", }, 653 { } 654}; 655MODULE_DEVICE_TABLE(of, drv260x_of_match); 656 657static struct i2c_driver drv260x_driver = { 658 .probe = drv260x_probe, 659 .driver = { 660 .name = "drv260x-haptics", 661 .of_match_table = drv260x_of_match, 662 .pm = &drv260x_pm_ops, 663 }, 664 .id_table = drv260x_id, 665}; 666module_i2c_driver(drv260x_driver); 667 668MODULE_DESCRIPTION("TI DRV260x haptics driver"); 669MODULE_LICENSE("GPL"); 670MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); 671