This source file includes following definitions.
- drv260x_calculate_voltage
- drv260x_worker
- drv260x_haptics_play
- drv260x_close
- drv260x_init
- drv260x_probe
- drv260x_suspend
- drv260x_resume
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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
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
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
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
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
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
126 #define DRV260X_AC_CPLE_EN (1 << 5)
127 #define DRV260X_STARTUP_BOOST (1 << 7)
128
129
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
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
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)
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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
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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
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
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>");