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_ANALOG_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 | * @overdrive_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 | u8 magnitude; |
190 | u32 mode; |
191 | u32 library; |
192 | int rated_voltage; |
193 | int overdrive_voltage; |
194 | }; |
195 | |
196 | #define DRV260X_DEF_RATED_VOLT 0x90 |
197 | #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 |
198 | |
199 | /* |
200 | * Rated and Overdriver Voltages: |
201 | * Calculated using the formula r = v * 255 / 5.6 |
202 | * where r is what will be written to the register |
203 | * and v is the rated or overdriver voltage of the actuator |
204 | */ |
205 | static int drv260x_calculate_voltage(unsigned int voltage) |
206 | { |
207 | return (voltage * 255 / 5600); |
208 | } |
209 | |
210 | static void drv260x_worker(struct work_struct *work) |
211 | { |
212 | struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); |
213 | int error; |
214 | |
215 | gpiod_set_value(desc: haptics->enable_gpio, value: 1); |
216 | /* Data sheet says to wait 250us before trying to communicate */ |
217 | udelay(250); |
218 | |
219 | error = regmap_write(map: haptics->regmap, |
220 | DRV260X_MODE, DRV260X_RT_PLAYBACK); |
221 | if (error) { |
222 | dev_err(&haptics->client->dev, |
223 | "Failed to write set mode: %d\n" , error); |
224 | } else { |
225 | error = regmap_write(map: haptics->regmap, |
226 | DRV260X_RT_PB_IN, val: haptics->magnitude); |
227 | if (error) |
228 | dev_err(&haptics->client->dev, |
229 | "Failed to set magnitude: %d\n" , error); |
230 | } |
231 | } |
232 | |
233 | static int drv260x_haptics_play(struct input_dev *input, void *data, |
234 | struct ff_effect *effect) |
235 | { |
236 | struct drv260x_data *haptics = input_get_drvdata(dev: input); |
237 | |
238 | haptics->mode = DRV260X_LRA_NO_CAL_MODE; |
239 | |
240 | /* Scale u16 magnitude into u8 register value */ |
241 | if (effect->u.rumble.strong_magnitude > 0) |
242 | haptics->magnitude = effect->u.rumble.strong_magnitude >> 8; |
243 | else if (effect->u.rumble.weak_magnitude > 0) |
244 | haptics->magnitude = effect->u.rumble.weak_magnitude >> 8; |
245 | else |
246 | haptics->magnitude = 0; |
247 | |
248 | schedule_work(work: &haptics->work); |
249 | |
250 | return 0; |
251 | } |
252 | |
253 | static void drv260x_close(struct input_dev *input) |
254 | { |
255 | struct drv260x_data *haptics = input_get_drvdata(dev: input); |
256 | int error; |
257 | |
258 | cancel_work_sync(work: &haptics->work); |
259 | |
260 | error = regmap_write(map: haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); |
261 | if (error) |
262 | dev_err(&haptics->client->dev, |
263 | "Failed to enter standby mode: %d\n" , error); |
264 | |
265 | gpiod_set_value(desc: haptics->enable_gpio, value: 0); |
266 | } |
267 | |
268 | static const struct reg_sequence drv260x_lra_cal_regs[] = { |
269 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
270 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, |
271 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
272 | DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, |
273 | }; |
274 | |
275 | static const struct reg_sequence drv260x_lra_init_regs[] = { |
276 | { DRV260X_MODE, DRV260X_RT_PLAYBACK }, |
277 | { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | |
278 | DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, |
279 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
280 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
281 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
282 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
283 | { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
284 | DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | |
285 | DRV260X_BEMF_GAIN_3 }, |
286 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
287 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, |
288 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA | DRV260X_ANALOG_IN }, |
289 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
290 | }; |
291 | |
292 | static const struct reg_sequence drv260x_erm_cal_regs[] = { |
293 | { DRV260X_MODE, DRV260X_AUTO_CAL }, |
294 | { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
295 | { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
296 | { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
297 | { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
298 | { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | |
299 | DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, |
300 | { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
301 | { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | |
302 | DRV260X_IDISS_TIME_75 }, |
303 | { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_RTP_UNSIGNED_DATA }, |
304 | { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
305 | }; |
306 | |
307 | static int drv260x_init(struct drv260x_data *haptics) |
308 | { |
309 | int error; |
310 | unsigned int cal_buf; |
311 | |
312 | error = regmap_write(map: haptics->regmap, |
313 | DRV260X_RATED_VOLT, val: haptics->rated_voltage); |
314 | if (error) { |
315 | dev_err(&haptics->client->dev, |
316 | "Failed to write DRV260X_RATED_VOLT register: %d\n" , |
317 | error); |
318 | return error; |
319 | } |
320 | |
321 | error = regmap_write(map: haptics->regmap, |
322 | DRV260X_OD_CLAMP_VOLT, val: haptics->overdrive_voltage); |
323 | if (error) { |
324 | dev_err(&haptics->client->dev, |
325 | "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n" , |
326 | error); |
327 | return error; |
328 | } |
329 | |
330 | switch (haptics->mode) { |
331 | case DRV260X_LRA_MODE: |
332 | error = regmap_register_patch(map: haptics->regmap, |
333 | regs: drv260x_lra_cal_regs, |
334 | ARRAY_SIZE(drv260x_lra_cal_regs)); |
335 | if (error) { |
336 | dev_err(&haptics->client->dev, |
337 | "Failed to write LRA calibration registers: %d\n" , |
338 | error); |
339 | return error; |
340 | } |
341 | |
342 | break; |
343 | |
344 | case DRV260X_ERM_MODE: |
345 | error = regmap_register_patch(map: haptics->regmap, |
346 | regs: drv260x_erm_cal_regs, |
347 | ARRAY_SIZE(drv260x_erm_cal_regs)); |
348 | if (error) { |
349 | dev_err(&haptics->client->dev, |
350 | "Failed to write ERM calibration registers: %d\n" , |
351 | error); |
352 | return error; |
353 | } |
354 | |
355 | error = regmap_update_bits(map: haptics->regmap, DRV260X_LIB_SEL, |
356 | DRV260X_LIB_SEL_MASK, |
357 | val: haptics->library); |
358 | if (error) { |
359 | dev_err(&haptics->client->dev, |
360 | "Failed to write DRV260X_LIB_SEL register: %d\n" , |
361 | error); |
362 | return error; |
363 | } |
364 | |
365 | break; |
366 | |
367 | default: |
368 | error = regmap_register_patch(map: haptics->regmap, |
369 | regs: drv260x_lra_init_regs, |
370 | ARRAY_SIZE(drv260x_lra_init_regs)); |
371 | if (error) { |
372 | dev_err(&haptics->client->dev, |
373 | "Failed to write LRA init registers: %d\n" , |
374 | error); |
375 | return error; |
376 | } |
377 | |
378 | error = regmap_update_bits(map: haptics->regmap, DRV260X_LIB_SEL, |
379 | DRV260X_LIB_SEL_MASK, |
380 | val: haptics->library); |
381 | if (error) { |
382 | dev_err(&haptics->client->dev, |
383 | "Failed to write DRV260X_LIB_SEL register: %d\n" , |
384 | error); |
385 | return error; |
386 | } |
387 | |
388 | /* No need to set GO bit here */ |
389 | return 0; |
390 | } |
391 | |
392 | error = regmap_write(map: haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); |
393 | if (error) { |
394 | dev_err(&haptics->client->dev, |
395 | "Failed to write GO register: %d\n" , |
396 | error); |
397 | return error; |
398 | } |
399 | |
400 | do { |
401 | usleep_range(min: 15000, max: 15500); |
402 | error = regmap_read(map: haptics->regmap, DRV260X_GO, val: &cal_buf); |
403 | if (error) { |
404 | dev_err(&haptics->client->dev, |
405 | "Failed to read GO register: %d\n" , |
406 | error); |
407 | return error; |
408 | } |
409 | } while (cal_buf == DRV260X_GO_BIT); |
410 | |
411 | return 0; |
412 | } |
413 | |
414 | static const struct regmap_config drv260x_regmap_config = { |
415 | .reg_bits = 8, |
416 | .val_bits = 8, |
417 | |
418 | .max_register = DRV260X_MAX_REG, |
419 | .cache_type = REGCACHE_NONE, |
420 | }; |
421 | |
422 | static int drv260x_probe(struct i2c_client *client) |
423 | { |
424 | struct device *dev = &client->dev; |
425 | struct drv260x_data *haptics; |
426 | u32 voltage; |
427 | int error; |
428 | |
429 | haptics = devm_kzalloc(dev, size: sizeof(*haptics), GFP_KERNEL); |
430 | if (!haptics) |
431 | return -ENOMEM; |
432 | |
433 | error = device_property_read_u32(dev, propname: "mode" , val: &haptics->mode); |
434 | if (error) { |
435 | dev_err(dev, "Can't fetch 'mode' property: %d\n" , error); |
436 | return error; |
437 | } |
438 | |
439 | if (haptics->mode < DRV260X_LRA_MODE || |
440 | haptics->mode > DRV260X_ERM_MODE) { |
441 | dev_err(dev, "Vibrator mode is invalid: %i\n" , haptics->mode); |
442 | return -EINVAL; |
443 | } |
444 | |
445 | error = device_property_read_u32(dev, propname: "library-sel" , val: &haptics->library); |
446 | if (error) { |
447 | dev_err(dev, "Can't fetch 'library-sel' property: %d\n" , error); |
448 | return error; |
449 | } |
450 | |
451 | if (haptics->library < DRV260X_LIB_EMPTY || |
452 | haptics->library > DRV260X_ERM_LIB_F) { |
453 | dev_err(dev, |
454 | "Library value is invalid: %i\n" , haptics->library); |
455 | return -EINVAL; |
456 | } |
457 | |
458 | if (haptics->mode == DRV260X_LRA_MODE && |
459 | haptics->library != DRV260X_LIB_EMPTY && |
460 | haptics->library != DRV260X_LIB_LRA) { |
461 | dev_err(dev, "LRA Mode with ERM Library mismatch\n" ); |
462 | return -EINVAL; |
463 | } |
464 | |
465 | if (haptics->mode == DRV260X_ERM_MODE && |
466 | (haptics->library == DRV260X_LIB_EMPTY || |
467 | haptics->library == DRV260X_LIB_LRA)) { |
468 | dev_err(dev, "ERM Mode with LRA Library mismatch\n" ); |
469 | return -EINVAL; |
470 | } |
471 | |
472 | error = device_property_read_u32(dev, propname: "vib-rated-mv" , val: &voltage); |
473 | haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : |
474 | drv260x_calculate_voltage(voltage); |
475 | |
476 | error = device_property_read_u32(dev, propname: "vib-overdrive-mv" , val: &voltage); |
477 | haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : |
478 | drv260x_calculate_voltage(voltage); |
479 | |
480 | haptics->regulator = devm_regulator_get(dev, id: "vbat" ); |
481 | if (IS_ERR(ptr: haptics->regulator)) { |
482 | error = PTR_ERR(ptr: haptics->regulator); |
483 | dev_err(dev, "unable to get regulator, error: %d\n" , error); |
484 | return error; |
485 | } |
486 | |
487 | haptics->enable_gpio = devm_gpiod_get_optional(dev, con_id: "enable" , |
488 | flags: GPIOD_OUT_HIGH); |
489 | if (IS_ERR(ptr: haptics->enable_gpio)) |
490 | return PTR_ERR(ptr: haptics->enable_gpio); |
491 | |
492 | haptics->input_dev = devm_input_allocate_device(dev); |
493 | if (!haptics->input_dev) { |
494 | dev_err(dev, "Failed to allocate input device\n" ); |
495 | return -ENOMEM; |
496 | } |
497 | |
498 | haptics->input_dev->name = "drv260x:haptics" ; |
499 | haptics->input_dev->close = drv260x_close; |
500 | input_set_drvdata(dev: haptics->input_dev, data: haptics); |
501 | input_set_capability(dev: haptics->input_dev, EV_FF, FF_RUMBLE); |
502 | |
503 | error = input_ff_create_memless(dev: haptics->input_dev, NULL, |
504 | play_effect: drv260x_haptics_play); |
505 | if (error) { |
506 | dev_err(dev, "input_ff_create() failed: %d\n" , error); |
507 | return error; |
508 | } |
509 | |
510 | INIT_WORK(&haptics->work, drv260x_worker); |
511 | |
512 | haptics->client = client; |
513 | i2c_set_clientdata(client, data: haptics); |
514 | |
515 | haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); |
516 | if (IS_ERR(ptr: haptics->regmap)) { |
517 | error = PTR_ERR(ptr: haptics->regmap); |
518 | dev_err(dev, "Failed to allocate register map: %d\n" , error); |
519 | return error; |
520 | } |
521 | |
522 | error = drv260x_init(haptics); |
523 | if (error) { |
524 | dev_err(dev, "Device init failed: %d\n" , error); |
525 | return error; |
526 | } |
527 | |
528 | error = input_register_device(haptics->input_dev); |
529 | if (error) { |
530 | dev_err(dev, "couldn't register input device: %d\n" , error); |
531 | return error; |
532 | } |
533 | |
534 | return 0; |
535 | } |
536 | |
537 | static int drv260x_suspend(struct device *dev) |
538 | { |
539 | struct drv260x_data *haptics = dev_get_drvdata(dev); |
540 | int ret = 0; |
541 | |
542 | mutex_lock(&haptics->input_dev->mutex); |
543 | |
544 | if (input_device_enabled(dev: haptics->input_dev)) { |
545 | ret = regmap_update_bits(map: haptics->regmap, |
546 | DRV260X_MODE, |
547 | DRV260X_STANDBY_MASK, |
548 | DRV260X_STANDBY); |
549 | if (ret) { |
550 | dev_err(dev, "Failed to set standby mode\n" ); |
551 | goto out; |
552 | } |
553 | |
554 | gpiod_set_value(desc: haptics->enable_gpio, value: 0); |
555 | |
556 | ret = regulator_disable(regulator: haptics->regulator); |
557 | if (ret) { |
558 | dev_err(dev, "Failed to disable regulator\n" ); |
559 | regmap_update_bits(map: haptics->regmap, |
560 | DRV260X_MODE, |
561 | DRV260X_STANDBY_MASK, val: 0); |
562 | } |
563 | } |
564 | out: |
565 | mutex_unlock(lock: &haptics->input_dev->mutex); |
566 | return ret; |
567 | } |
568 | |
569 | static int drv260x_resume(struct device *dev) |
570 | { |
571 | struct drv260x_data *haptics = dev_get_drvdata(dev); |
572 | int ret = 0; |
573 | |
574 | mutex_lock(&haptics->input_dev->mutex); |
575 | |
576 | if (input_device_enabled(dev: haptics->input_dev)) { |
577 | ret = regulator_enable(regulator: haptics->regulator); |
578 | if (ret) { |
579 | dev_err(dev, "Failed to enable regulator\n" ); |
580 | goto out; |
581 | } |
582 | |
583 | ret = regmap_update_bits(map: haptics->regmap, |
584 | DRV260X_MODE, |
585 | DRV260X_STANDBY_MASK, val: 0); |
586 | if (ret) { |
587 | dev_err(dev, "Failed to unset standby mode\n" ); |
588 | regulator_disable(regulator: haptics->regulator); |
589 | goto out; |
590 | } |
591 | |
592 | gpiod_set_value(desc: haptics->enable_gpio, value: 1); |
593 | } |
594 | |
595 | out: |
596 | mutex_unlock(lock: &haptics->input_dev->mutex); |
597 | return ret; |
598 | } |
599 | |
600 | static DEFINE_SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); |
601 | |
602 | static const struct i2c_device_id drv260x_id[] = { |
603 | { "drv2605l" , 0 }, |
604 | { } |
605 | }; |
606 | MODULE_DEVICE_TABLE(i2c, drv260x_id); |
607 | |
608 | static const struct of_device_id drv260x_of_match[] = { |
609 | { .compatible = "ti,drv2604" , }, |
610 | { .compatible = "ti,drv2604l" , }, |
611 | { .compatible = "ti,drv2605" , }, |
612 | { .compatible = "ti,drv2605l" , }, |
613 | { } |
614 | }; |
615 | MODULE_DEVICE_TABLE(of, drv260x_of_match); |
616 | |
617 | static struct i2c_driver drv260x_driver = { |
618 | .probe = drv260x_probe, |
619 | .driver = { |
620 | .name = "drv260x-haptics" , |
621 | .of_match_table = drv260x_of_match, |
622 | .pm = pm_sleep_ptr(&drv260x_pm_ops), |
623 | }, |
624 | .id_table = drv260x_id, |
625 | }; |
626 | module_i2c_driver(drv260x_driver); |
627 | |
628 | MODULE_DESCRIPTION("TI DRV260x haptics driver" ); |
629 | MODULE_LICENSE("GPL" ); |
630 | MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>" ); |
631 | |