1/*
2 * DRV260X haptics driver family
3 *
4 * Author: Dan Murphy <dmurphy@ti.com>
5 *
6 * Copyright: (C) 2014 Texas Instruments, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18#include <linux/i2c.h>
19#include <linux/input.h>
20#include <linux/module.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <linux/delay.h>
24#include <linux/gpio/consumer.h>
25#include <linux/regulator/consumer.h>
26
27#include <dt-bindings/input/ti-drv260x.h>
28
29#define DRV260X_STATUS 0x0
30#define DRV260X_MODE 0x1
31#define DRV260X_RT_PB_IN 0x2
32#define DRV260X_LIB_SEL 0x3
33#define DRV260X_WV_SEQ_1 0x4
34#define DRV260X_WV_SEQ_2 0x5
35#define DRV260X_WV_SEQ_3 0x6
36#define DRV260X_WV_SEQ_4 0x7
37#define DRV260X_WV_SEQ_5 0x8
38#define DRV260X_WV_SEQ_6 0x9
39#define DRV260X_WV_SEQ_7 0xa
40#define DRV260X_WV_SEQ_8 0xb
41#define DRV260X_GO 0xc
42#define DRV260X_OVERDRIVE_OFF 0xd
43#define DRV260X_SUSTAIN_P_OFF 0xe
44#define DRV260X_SUSTAIN_N_OFF 0xf
45#define DRV260X_BRAKE_OFF 0x10
46#define DRV260X_A_TO_V_CTRL 0x11
47#define DRV260X_A_TO_V_MIN_INPUT 0x12
48#define DRV260X_A_TO_V_MAX_INPUT 0x13
49#define DRV260X_A_TO_V_MIN_OUT 0x14
50#define DRV260X_A_TO_V_MAX_OUT 0x15
51#define DRV260X_RATED_VOLT 0x16
52#define DRV260X_OD_CLAMP_VOLT 0x17
53#define DRV260X_CAL_COMP 0x18
54#define DRV260X_CAL_BACK_EMF 0x19
55#define DRV260X_FEEDBACK_CTRL 0x1a
56#define DRV260X_CTRL1 0x1b
57#define DRV260X_CTRL2 0x1c
58#define DRV260X_CTRL3 0x1d
59#define DRV260X_CTRL4 0x1e
60#define DRV260X_CTRL5 0x1f
61#define DRV260X_LRA_LOOP_PERIOD 0x20
62#define DRV260X_VBAT_MON 0x21
63#define DRV260X_LRA_RES_PERIOD 0x22
64#define DRV260X_MAX_REG 0x23
65
66#define DRV260X_GO_BIT 0x01
67
68/* Library Selection */
69#define DRV260X_LIB_SEL_MASK 0x07
70#define DRV260X_LIB_SEL_RAM 0x0
71#define DRV260X_LIB_SEL_OD 0x1
72#define DRV260X_LIB_SEL_40_60 0x2
73#define DRV260X_LIB_SEL_60_80 0x3
74#define DRV260X_LIB_SEL_100_140 0x4
75#define DRV260X_LIB_SEL_140_PLUS 0x5
76
77#define DRV260X_LIB_SEL_HIZ_MASK 0x10
78#define DRV260X_LIB_SEL_HIZ_EN 0x01
79#define DRV260X_LIB_SEL_HIZ_DIS 0
80
81/* Mode register */
82#define DRV260X_STANDBY (1 << 6)
83#define DRV260X_STANDBY_MASK 0x40
84#define DRV260X_INTERNAL_TRIGGER 0x00
85#define DRV260X_EXT_TRIGGER_EDGE 0x01
86#define DRV260X_EXT_TRIGGER_LEVEL 0x02
87#define DRV260X_PWM_ANALOG_IN 0x03
88#define DRV260X_AUDIOHAPTIC 0x04
89#define DRV260X_RT_PLAYBACK 0x05
90#define DRV260X_DIAGNOSTICS 0x06
91#define DRV260X_AUTO_CAL 0x07
92
93/* Audio to Haptics Control */
94#define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2)
95#define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2)
96#define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2)
97#define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2)
98
99#define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00
100#define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01
101#define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02
102#define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03
103
104/* Min/Max Input/Output Voltages */
105#define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19
106#define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64
107#define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19
108#define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF
109
110/* Feedback register */
111#define DRV260X_FB_REG_ERM_MODE 0x7f
112#define DRV260X_FB_REG_LRA_MODE (1 << 7)
113
114#define DRV260X_BRAKE_FACTOR_MASK 0x1f
115#define DRV260X_BRAKE_FACTOR_2X (1 << 0)
116#define DRV260X_BRAKE_FACTOR_3X (2 << 4)
117#define DRV260X_BRAKE_FACTOR_4X (3 << 4)
118#define DRV260X_BRAKE_FACTOR_6X (4 << 4)
119#define DRV260X_BRAKE_FACTOR_8X (5 << 4)
120#define DRV260X_BRAKE_FACTOR_16 (6 << 4)
121#define DRV260X_BRAKE_FACTOR_DIS (7 << 4)
122
123#define DRV260X_LOOP_GAIN_LOW 0xf3
124#define DRV260X_LOOP_GAIN_MED (1 << 2)
125#define DRV260X_LOOP_GAIN_HIGH (2 << 2)
126#define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2)
127
128#define DRV260X_BEMF_GAIN_0 0xfc
129#define DRV260X_BEMF_GAIN_1 (1 << 0)
130#define DRV260X_BEMF_GAIN_2 (2 << 0)
131#define DRV260X_BEMF_GAIN_3 (3 << 0)
132
133/* Control 1 register */
134#define DRV260X_AC_CPLE_EN (1 << 5)
135#define DRV260X_STARTUP_BOOST (1 << 7)
136
137/* Control 2 register */
138
139#define DRV260X_IDISS_TIME_45 0
140#define DRV260X_IDISS_TIME_75 (1 << 0)
141#define DRV260X_IDISS_TIME_150 (1 << 1)
142#define DRV260X_IDISS_TIME_225 0x03
143
144#define DRV260X_BLANK_TIME_45 (0 << 2)
145#define DRV260X_BLANK_TIME_75 (1 << 2)
146#define DRV260X_BLANK_TIME_150 (2 << 2)
147#define DRV260X_BLANK_TIME_225 (3 << 2)
148
149#define DRV260X_SAMP_TIME_150 (0 << 4)
150#define DRV260X_SAMP_TIME_200 (1 << 4)
151#define DRV260X_SAMP_TIME_250 (2 << 4)
152#define DRV260X_SAMP_TIME_300 (3 << 4)
153
154#define DRV260X_BRAKE_STABILIZER (1 << 6)
155#define DRV260X_UNIDIR_IN (0 << 7)
156#define DRV260X_BIDIR_IN (1 << 7)
157
158/* Control 3 Register */
159#define DRV260X_LRA_OPEN_LOOP (1 << 0)
160#define DRV260X_ANANLOG_IN (1 << 1)
161#define DRV260X_LRA_DRV_MODE (1 << 2)
162#define DRV260X_RTP_UNSIGNED_DATA (1 << 3)
163#define DRV260X_SUPPLY_COMP_DIS (1 << 4)
164#define DRV260X_ERM_OPEN_LOOP (1 << 5)
165#define DRV260X_NG_THRESH_0 (0 << 6)
166#define DRV260X_NG_THRESH_2 (1 << 6)
167#define DRV260X_NG_THRESH_4 (2 << 6)
168#define DRV260X_NG_THRESH_8 (3 << 6)
169
170/* Control 4 Register */
171#define DRV260X_AUTOCAL_TIME_150MS (0 << 4)
172#define DRV260X_AUTOCAL_TIME_250MS (1 << 4)
173#define DRV260X_AUTOCAL_TIME_500MS (2 << 4)
174#define DRV260X_AUTOCAL_TIME_1000MS (3 << 4)
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 * @overdriver_voltage - The over drive voltage of the actuator
189**/
190struct 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 u32 magnitude;
198 u32 mode;
199 u32 library;
200 int rated_voltage;
201 int overdrive_voltage;
202};
203
204static const struct reg_default drv260x_reg_defs[] = {
205 { DRV260X_STATUS, 0xe0 },
206 { DRV260X_MODE, 0x40 },
207 { DRV260X_RT_PB_IN, 0x00 },
208 { DRV260X_LIB_SEL, 0x00 },
209 { DRV260X_WV_SEQ_1, 0x01 },
210 { DRV260X_WV_SEQ_2, 0x00 },
211 { DRV260X_WV_SEQ_3, 0x00 },
212 { DRV260X_WV_SEQ_4, 0x00 },
213 { DRV260X_WV_SEQ_5, 0x00 },
214 { DRV260X_WV_SEQ_6, 0x00 },
215 { DRV260X_WV_SEQ_7, 0x00 },
216 { DRV260X_WV_SEQ_8, 0x00 },
217 { DRV260X_GO, 0x00 },
218 { DRV260X_OVERDRIVE_OFF, 0x00 },
219 { DRV260X_SUSTAIN_P_OFF, 0x00 },
220 { DRV260X_SUSTAIN_N_OFF, 0x00 },
221 { DRV260X_BRAKE_OFF, 0x00 },
222 { DRV260X_A_TO_V_CTRL, 0x05 },
223 { DRV260X_A_TO_V_MIN_INPUT, 0x19 },
224 { DRV260X_A_TO_V_MAX_INPUT, 0xff },
225 { DRV260X_A_TO_V_MIN_OUT, 0x19 },
226 { DRV260X_A_TO_V_MAX_OUT, 0xff },
227 { DRV260X_RATED_VOLT, 0x3e },
228 { DRV260X_OD_CLAMP_VOLT, 0x8c },
229 { DRV260X_CAL_COMP, 0x0c },
230 { DRV260X_CAL_BACK_EMF, 0x6c },
231 { DRV260X_FEEDBACK_CTRL, 0x36 },
232 { DRV260X_CTRL1, 0x93 },
233 { DRV260X_CTRL2, 0xfa },
234 { DRV260X_CTRL3, 0xa0 },
235 { DRV260X_CTRL4, 0x20 },
236 { DRV260X_CTRL5, 0x80 },
237 { DRV260X_LRA_LOOP_PERIOD, 0x33 },
238 { DRV260X_VBAT_MON, 0x00 },
239 { DRV260X_LRA_RES_PERIOD, 0x00 },
240};
241
242#define DRV260X_DEF_RATED_VOLT 0x90
243#define DRV260X_DEF_OD_CLAMP_VOLT 0x90
244
245/**
246 * Rated and Overdriver Voltages:
247 * Calculated using the formula r = v * 255 / 5.6
248 * where r is what will be written to the register
249 * and v is the rated or overdriver voltage of the actuator
250 **/
251static int drv260x_calculate_voltage(unsigned int voltage)
252{
253 return (voltage * 255 / 5600);
254}
255
256static void drv260x_worker(struct work_struct *work)
257{
258 struct drv260x_data *haptics = container_of(work, struct drv260x_data, work);
259 int error;
260
261 gpiod_set_value(haptics->enable_gpio, 1);
262 /* Data sheet says to wait 250us before trying to communicate */
263 udelay(250);
264
265 error = regmap_write(haptics->regmap,
266 DRV260X_MODE, DRV260X_RT_PLAYBACK);
267 if (error) {
268 dev_err(&haptics->client->dev,
269 "Failed to write set mode: %d\n", error);
270 } else {
271 error = regmap_write(haptics->regmap,
272 DRV260X_RT_PB_IN, haptics->magnitude);
273 if (error)
274 dev_err(&haptics->client->dev,
275 "Failed to set magnitude: %d\n", error);
276 }
277}
278
279static int drv260x_haptics_play(struct input_dev *input, void *data,
280 struct ff_effect *effect)
281{
282 struct drv260x_data *haptics = input_get_drvdata(input);
283
284 haptics->mode = DRV260X_LRA_NO_CAL_MODE;
285
286 if (effect->u.rumble.strong_magnitude > 0)
287 haptics->magnitude = effect->u.rumble.strong_magnitude;
288 else if (effect->u.rumble.weak_magnitude > 0)
289 haptics->magnitude = effect->u.rumble.weak_magnitude;
290 else
291 haptics->magnitude = 0;
292
293 schedule_work(&haptics->work);
294
295 return 0;
296}
297
298static void drv260x_close(struct input_dev *input)
299{
300 struct drv260x_data *haptics = input_get_drvdata(input);
301 int error;
302
303 cancel_work_sync(&haptics->work);
304
305 error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY);
306 if (error)
307 dev_err(&haptics->client->dev,
308 "Failed to enter standby mode: %d\n", error);
309
310 gpiod_set_value(haptics->enable_gpio, 0);
311}
312
313static const struct reg_sequence drv260x_lra_cal_regs[] = {
314 { DRV260X_MODE, DRV260X_AUTO_CAL },
315 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 },
316 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE |
317 DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH },
318};
319
320static const struct reg_sequence drv260x_lra_init_regs[] = {
321 { DRV260X_MODE, DRV260X_RT_PLAYBACK },
322 { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS |
323 DRV260X_AUDIO_HAPTICS_FILTER_125HZ },
324 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
325 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
326 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
327 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
328 { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE |
329 DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED |
330 DRV260X_BEMF_GAIN_3 },
331 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
332 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 },
333 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN },
334 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
335};
336
337static const struct reg_sequence drv260x_erm_cal_regs[] = {
338 { DRV260X_MODE, DRV260X_AUTO_CAL },
339 { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
340 { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
341 { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
342 { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
343 { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X |
344 DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 },
345 { DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
346 { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 |
347 DRV260X_IDISS_TIME_75 },
348 { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP },
349 { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
350};
351
352static int drv260x_init(struct drv260x_data *haptics)
353{
354 int error;
355 unsigned int cal_buf;
356
357 error = regmap_write(haptics->regmap,
358 DRV260X_RATED_VOLT, haptics->rated_voltage);
359 if (error) {
360 dev_err(&haptics->client->dev,
361 "Failed to write DRV260X_RATED_VOLT register: %d\n",
362 error);
363 return error;
364 }
365
366 error = regmap_write(haptics->regmap,
367 DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage);
368 if (error) {
369 dev_err(&haptics->client->dev,
370 "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n",
371 error);
372 return error;
373 }
374
375 switch (haptics->mode) {
376 case DRV260X_LRA_MODE:
377 error = regmap_register_patch(haptics->regmap,
378 drv260x_lra_cal_regs,
379 ARRAY_SIZE(drv260x_lra_cal_regs));
380 if (error) {
381 dev_err(&haptics->client->dev,
382 "Failed to write LRA calibration registers: %d\n",
383 error);
384 return error;
385 }
386
387 break;
388
389 case DRV260X_ERM_MODE:
390 error = regmap_register_patch(haptics->regmap,
391 drv260x_erm_cal_regs,
392 ARRAY_SIZE(drv260x_erm_cal_regs));
393 if (error) {
394 dev_err(&haptics->client->dev,
395 "Failed to write ERM calibration registers: %d\n",
396 error);
397 return error;
398 }
399
400 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
401 DRV260X_LIB_SEL_MASK,
402 haptics->library);
403 if (error) {
404 dev_err(&haptics->client->dev,
405 "Failed to write DRV260X_LIB_SEL register: %d\n",
406 error);
407 return error;
408 }
409
410 break;
411
412 default:
413 error = regmap_register_patch(haptics->regmap,
414 drv260x_lra_init_regs,
415 ARRAY_SIZE(drv260x_lra_init_regs));
416 if (error) {
417 dev_err(&haptics->client->dev,
418 "Failed to write LRA init registers: %d\n",
419 error);
420 return error;
421 }
422
423 error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
424 DRV260X_LIB_SEL_MASK,
425 haptics->library);
426 if (error) {
427 dev_err(&haptics->client->dev,
428 "Failed to write DRV260X_LIB_SEL register: %d\n",
429 error);
430 return error;
431 }
432
433 /* No need to set GO bit here */
434 return 0;
435 }
436
437 error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT);
438 if (error) {
439 dev_err(&haptics->client->dev,
440 "Failed to write GO register: %d\n",
441 error);
442 return error;
443 }
444
445 do {
446 error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf);
447 if (error) {
448 dev_err(&haptics->client->dev,
449 "Failed to read GO register: %d\n",
450 error);
451 return error;
452 }
453 } while (cal_buf == DRV260X_GO_BIT);
454
455 return 0;
456}
457
458static const struct regmap_config drv260x_regmap_config = {
459 .reg_bits = 8,
460 .val_bits = 8,
461
462 .max_register = DRV260X_MAX_REG,
463 .reg_defaults = drv260x_reg_defs,
464 .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs),
465 .cache_type = REGCACHE_NONE,
466};
467
468static int drv260x_probe(struct i2c_client *client,
469 const struct i2c_device_id *id)
470{
471 struct device *dev = &client->dev;
472 struct drv260x_data *haptics;
473 u32 voltage;
474 int error;
475
476 haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL);
477 if (!haptics)
478 return -ENOMEM;
479
480 error = device_property_read_u32(dev, "mode", &haptics->mode);
481 if (error) {
482 dev_err(dev, "Can't fetch 'mode' property: %d\n", error);
483 return error;
484 }
485
486 if (haptics->mode < DRV260X_LRA_MODE ||
487 haptics->mode > DRV260X_ERM_MODE) {
488 dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode);
489 return -EINVAL;
490 }
491
492 error = device_property_read_u32(dev, "library-sel", &haptics->library);
493 if (error) {
494 dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error);
495 return error;
496 }
497
498 if (haptics->library < DRV260X_LIB_EMPTY ||
499 haptics->library > DRV260X_ERM_LIB_F) {
500 dev_err(dev,
501 "Library value is invalid: %i\n", haptics->library);
502 return -EINVAL;
503 }
504
505 if (haptics->mode == DRV260X_LRA_MODE &&
506 haptics->library != DRV260X_LIB_EMPTY &&
507 haptics->library != DRV260X_LIB_LRA) {
508 dev_err(dev, "LRA Mode with ERM Library mismatch\n");
509 return -EINVAL;
510 }
511
512 if (haptics->mode == DRV260X_ERM_MODE &&
513 (haptics->library == DRV260X_LIB_EMPTY ||
514 haptics->library == DRV260X_LIB_LRA)) {
515 dev_err(dev, "ERM Mode with LRA Library mismatch\n");
516 return -EINVAL;
517 }
518
519 error = device_property_read_u32(dev, "vib-rated-mv", &voltage);
520 haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT :
521 drv260x_calculate_voltage(voltage);
522
523 error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage);
524 haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT :
525 drv260x_calculate_voltage(voltage);
526
527 haptics->regulator = devm_regulator_get(dev, "vbat");
528 if (IS_ERR(haptics->regulator)) {
529 error = PTR_ERR(haptics->regulator);
530 dev_err(dev, "unable to get regulator, error: %d\n", error);
531 return error;
532 }
533
534 haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable",
535 GPIOD_OUT_HIGH);
536 if (IS_ERR(haptics->enable_gpio))
537 return PTR_ERR(haptics->enable_gpio);
538
539 haptics->input_dev = devm_input_allocate_device(dev);
540 if (!haptics->input_dev) {
541 dev_err(dev, "Failed to allocate input device\n");
542 return -ENOMEM;
543 }
544
545 haptics->input_dev->name = "drv260x:haptics";
546 haptics->input_dev->close = drv260x_close;
547 input_set_drvdata(haptics->input_dev, haptics);
548 input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE);
549
550 error = input_ff_create_memless(haptics->input_dev, NULL,
551 drv260x_haptics_play);
552 if (error) {
553 dev_err(dev, "input_ff_create() failed: %d\n", error);
554 return error;
555 }
556
557 INIT_WORK(&haptics->work, drv260x_worker);
558
559 haptics->client = client;
560 i2c_set_clientdata(client, haptics);
561
562 haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config);
563 if (IS_ERR(haptics->regmap)) {
564 error = PTR_ERR(haptics->regmap);
565 dev_err(dev, "Failed to allocate register map: %d\n", error);
566 return error;
567 }
568
569 error = drv260x_init(haptics);
570 if (error) {
571 dev_err(dev, "Device init failed: %d\n", error);
572 return error;
573 }
574
575 error = input_register_device(haptics->input_dev);
576 if (error) {
577 dev_err(dev, "couldn't register input device: %d\n", error);
578 return error;
579 }
580
581 return 0;
582}
583
584static int __maybe_unused drv260x_suspend(struct device *dev)
585{
586 struct drv260x_data *haptics = dev_get_drvdata(dev);
587 int ret = 0;
588
589 mutex_lock(&haptics->input_dev->mutex);
590
591 if (haptics->input_dev->users) {
592 ret = regmap_update_bits(haptics->regmap,
593 DRV260X_MODE,
594 DRV260X_STANDBY_MASK,
595 DRV260X_STANDBY);
596 if (ret) {
597 dev_err(dev, "Failed to set standby mode\n");
598 goto out;
599 }
600
601 gpiod_set_value(haptics->enable_gpio, 0);
602
603 ret = regulator_disable(haptics->regulator);
604 if (ret) {
605 dev_err(dev, "Failed to disable regulator\n");
606 regmap_update_bits(haptics->regmap,
607 DRV260X_MODE,
608 DRV260X_STANDBY_MASK, 0);
609 }
610 }
611out:
612 mutex_unlock(&haptics->input_dev->mutex);
613 return ret;
614}
615
616static int __maybe_unused drv260x_resume(struct device *dev)
617{
618 struct drv260x_data *haptics = dev_get_drvdata(dev);
619 int ret = 0;
620
621 mutex_lock(&haptics->input_dev->mutex);
622
623 if (haptics->input_dev->users) {
624 ret = regulator_enable(haptics->regulator);
625 if (ret) {
626 dev_err(dev, "Failed to enable regulator\n");
627 goto out;
628 }
629
630 ret = regmap_update_bits(haptics->regmap,
631 DRV260X_MODE,
632 DRV260X_STANDBY_MASK, 0);
633 if (ret) {
634 dev_err(dev, "Failed to unset standby mode\n");
635 regulator_disable(haptics->regulator);
636 goto out;
637 }
638
639 gpiod_set_value(haptics->enable_gpio, 1);
640 }
641
642out:
643 mutex_unlock(&haptics->input_dev->mutex);
644 return ret;
645}
646
647static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume);
648
649static const struct i2c_device_id drv260x_id[] = {
650 { "drv2605l", 0 },
651 { }
652};
653MODULE_DEVICE_TABLE(i2c, drv260x_id);
654
655static const struct of_device_id drv260x_of_match[] = {
656 { .compatible = "ti,drv2604", },
657 { .compatible = "ti,drv2604l", },
658 { .compatible = "ti,drv2605", },
659 { .compatible = "ti,drv2605l", },
660 { }
661};
662MODULE_DEVICE_TABLE(of, drv260x_of_match);
663
664static struct i2c_driver drv260x_driver = {
665 .probe = drv260x_probe,
666 .driver = {
667 .name = "drv260x-haptics",
668 .of_match_table = drv260x_of_match,
669 .pm = &drv260x_pm_ops,
670 },
671 .id_table = drv260x_id,
672};
673module_i2c_driver(drv260x_driver);
674
675MODULE_DESCRIPTION("TI DRV260x haptics driver");
676MODULE_LICENSE("GPL");
677MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
678