Commit | Line | Data |
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88b613e6 ST |
1 | /* |
2 | * Driver for PCA9685 16-channel 12-bit PWM LED controller | |
3 | * | |
4 | * Copyright (C) 2013 Steffen Trumtrar <s.trumtrar@pengutronix.de> | |
01ec8472 | 5 | * Copyright (C) 2015 Clemens Gruber <clemens.gruber@pqgruber.com> |
88b613e6 ST |
6 | * |
7 | * based on the pwm-twl-led.c driver | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License version 2 as published by | |
11 | * the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along with | |
19 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
912b8439 | 22 | #include <linux/acpi.h> |
bccec89f | 23 | #include <linux/gpio/driver.h> |
88b613e6 ST |
24 | #include <linux/i2c.h> |
25 | #include <linux/module.h> | |
bccec89f | 26 | #include <linux/mutex.h> |
88b613e6 | 27 | #include <linux/platform_device.h> |
912b8439 | 28 | #include <linux/property.h> |
88b613e6 ST |
29 | #include <linux/pwm.h> |
30 | #include <linux/regmap.h> | |
31 | #include <linux/slab.h> | |
01ec8472 | 32 | #include <linux/delay.h> |
c40c461e | 33 | #include <linux/pm_runtime.h> |
01ec8472 CG |
34 | |
35 | /* | |
36 | * Because the PCA9685 has only one prescaler per chip, changing the period of | |
37 | * one channel affects the period of all 16 PWM outputs! | |
38 | * However, the ratio between each configured duty cycle and the chip-wide | |
39 | * period remains constant, because the OFF time is set in proportion to the | |
40 | * counter range. | |
41 | */ | |
88b613e6 ST |
42 | |
43 | #define PCA9685_MODE1 0x00 | |
44 | #define PCA9685_MODE2 0x01 | |
45 | #define PCA9685_SUBADDR1 0x02 | |
46 | #define PCA9685_SUBADDR2 0x03 | |
47 | #define PCA9685_SUBADDR3 0x04 | |
48 | #define PCA9685_ALLCALLADDR 0x05 | |
49 | #define PCA9685_LEDX_ON_L 0x06 | |
50 | #define PCA9685_LEDX_ON_H 0x07 | |
51 | #define PCA9685_LEDX_OFF_L 0x08 | |
52 | #define PCA9685_LEDX_OFF_H 0x09 | |
53 | ||
54 | #define PCA9685_ALL_LED_ON_L 0xFA | |
55 | #define PCA9685_ALL_LED_ON_H 0xFB | |
56 | #define PCA9685_ALL_LED_OFF_L 0xFC | |
57 | #define PCA9685_ALL_LED_OFF_H 0xFD | |
58 | #define PCA9685_PRESCALE 0xFE | |
59 | ||
01ec8472 CG |
60 | #define PCA9685_PRESCALE_MIN 0x03 /* => max. frequency of 1526 Hz */ |
61 | #define PCA9685_PRESCALE_MAX 0xFF /* => min. frequency of 24 Hz */ | |
62 | ||
63 | #define PCA9685_COUNTER_RANGE 4096 | |
64 | #define PCA9685_DEFAULT_PERIOD 5000000 /* Default period_ns = 1/200 Hz */ | |
65 | #define PCA9685_OSC_CLOCK_MHZ 25 /* Internal oscillator with 25 MHz */ | |
66 | ||
88b613e6 ST |
67 | #define PCA9685_NUMREGS 0xFF |
68 | #define PCA9685_MAXCHAN 0x10 | |
69 | ||
70 | #define LED_FULL (1 << 4) | |
71 | #define MODE1_SLEEP (1 << 4) | |
72 | #define MODE2_INVRT (1 << 4) | |
73 | #define MODE2_OUTDRV (1 << 2) | |
74 | ||
75 | #define LED_N_ON_H(N) (PCA9685_LEDX_ON_H + (4 * (N))) | |
76 | #define LED_N_ON_L(N) (PCA9685_LEDX_ON_L + (4 * (N))) | |
77 | #define LED_N_OFF_H(N) (PCA9685_LEDX_OFF_H + (4 * (N))) | |
78 | #define LED_N_OFF_L(N) (PCA9685_LEDX_OFF_L + (4 * (N))) | |
79 | ||
80 | struct pca9685 { | |
81 | struct pwm_chip chip; | |
82 | struct regmap *regmap; | |
01ec8472 CG |
83 | int duty_ns; |
84 | int period_ns; | |
bccec89f MW |
85 | #if IS_ENABLED(CONFIG_GPIOLIB) |
86 | struct mutex lock; | |
87 | struct gpio_chip gpio; | |
88 | #endif | |
88b613e6 ST |
89 | }; |
90 | ||
91 | static inline struct pca9685 *to_pca(struct pwm_chip *chip) | |
92 | { | |
93 | return container_of(chip, struct pca9685, chip); | |
94 | } | |
95 | ||
bccec89f MW |
96 | #if IS_ENABLED(CONFIG_GPIOLIB) |
97 | static int pca9685_pwm_gpio_request(struct gpio_chip *gpio, unsigned int offset) | |
98 | { | |
99 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
100 | struct pwm_device *pwm; | |
101 | ||
102 | mutex_lock(&pca->lock); | |
103 | ||
104 | pwm = &pca->chip.pwms[offset]; | |
105 | ||
106 | if (pwm->flags & (PWMF_REQUESTED | PWMF_EXPORTED)) { | |
107 | mutex_unlock(&pca->lock); | |
108 | return -EBUSY; | |
109 | } | |
110 | ||
111 | pwm_set_chip_data(pwm, (void *)1); | |
112 | ||
113 | mutex_unlock(&pca->lock); | |
c40c461e | 114 | pm_runtime_get_sync(pca->chip.dev); |
bccec89f MW |
115 | return 0; |
116 | } | |
117 | ||
bccec89f MW |
118 | static bool pca9685_pwm_is_gpio(struct pca9685 *pca, struct pwm_device *pwm) |
119 | { | |
120 | bool is_gpio = false; | |
121 | ||
122 | mutex_lock(&pca->lock); | |
123 | ||
124 | if (pwm->hwpwm >= PCA9685_MAXCHAN) { | |
125 | unsigned int i; | |
126 | ||
127 | /* | |
128 | * Check if any of the GPIOs are requested and in that case | |
129 | * prevent using the "all LEDs" channel. | |
130 | */ | |
131 | for (i = 0; i < pca->gpio.ngpio; i++) | |
132 | if (gpiochip_is_requested(&pca->gpio, i)) { | |
133 | is_gpio = true; | |
134 | break; | |
135 | } | |
136 | } else if (pwm_get_chip_data(pwm)) { | |
137 | is_gpio = true; | |
138 | } | |
139 | ||
140 | mutex_unlock(&pca->lock); | |
141 | return is_gpio; | |
142 | } | |
143 | ||
144 | static int pca9685_pwm_gpio_get(struct gpio_chip *gpio, unsigned int offset) | |
145 | { | |
146 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
147 | struct pwm_device *pwm = &pca->chip.pwms[offset]; | |
148 | unsigned int value; | |
149 | ||
150 | regmap_read(pca->regmap, LED_N_ON_H(pwm->hwpwm), &value); | |
151 | ||
152 | return value & LED_FULL; | |
153 | } | |
154 | ||
155 | static void pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset, | |
156 | int value) | |
157 | { | |
158 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
159 | struct pwm_device *pwm = &pca->chip.pwms[offset]; | |
160 | unsigned int on = value ? LED_FULL : 0; | |
161 | ||
162 | /* Clear both OFF registers */ | |
163 | regmap_write(pca->regmap, LED_N_OFF_L(pwm->hwpwm), 0); | |
164 | regmap_write(pca->regmap, LED_N_OFF_H(pwm->hwpwm), 0); | |
165 | ||
166 | /* Set the full ON bit */ | |
167 | regmap_write(pca->regmap, LED_N_ON_H(pwm->hwpwm), on); | |
168 | } | |
169 | ||
c40c461e SVA |
170 | static void pca9685_pwm_gpio_free(struct gpio_chip *gpio, unsigned int offset) |
171 | { | |
172 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
173 | struct pwm_device *pwm; | |
174 | ||
175 | pca9685_pwm_gpio_set(gpio, offset, 0); | |
176 | pm_runtime_put(pca->chip.dev); | |
177 | mutex_lock(&pca->lock); | |
178 | pwm = &pca->chip.pwms[offset]; | |
179 | pwm_set_chip_data(pwm, NULL); | |
180 | mutex_unlock(&pca->lock); | |
181 | } | |
182 | ||
bccec89f MW |
183 | static int pca9685_pwm_gpio_get_direction(struct gpio_chip *chip, |
184 | unsigned int offset) | |
185 | { | |
186 | /* Always out */ | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static int pca9685_pwm_gpio_direction_input(struct gpio_chip *gpio, | |
191 | unsigned int offset) | |
192 | { | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | static int pca9685_pwm_gpio_direction_output(struct gpio_chip *gpio, | |
197 | unsigned int offset, int value) | |
198 | { | |
199 | pca9685_pwm_gpio_set(gpio, offset, value); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | /* | |
205 | * The PCA9685 has a bit for turning the PWM output full off or on. Some | |
206 | * boards like Intel Galileo actually uses these as normal GPIOs so we | |
207 | * expose a GPIO chip here which can exclusively take over the underlying | |
208 | * PWM channel. | |
209 | */ | |
210 | static int pca9685_pwm_gpio_probe(struct pca9685 *pca) | |
211 | { | |
212 | struct device *dev = pca->chip.dev; | |
213 | ||
214 | mutex_init(&pca->lock); | |
215 | ||
216 | pca->gpio.label = dev_name(dev); | |
217 | pca->gpio.parent = dev; | |
218 | pca->gpio.request = pca9685_pwm_gpio_request; | |
219 | pca->gpio.free = pca9685_pwm_gpio_free; | |
220 | pca->gpio.get_direction = pca9685_pwm_gpio_get_direction; | |
221 | pca->gpio.direction_input = pca9685_pwm_gpio_direction_input; | |
222 | pca->gpio.direction_output = pca9685_pwm_gpio_direction_output; | |
223 | pca->gpio.get = pca9685_pwm_gpio_get; | |
224 | pca->gpio.set = pca9685_pwm_gpio_set; | |
225 | pca->gpio.base = -1; | |
226 | pca->gpio.ngpio = PCA9685_MAXCHAN; | |
227 | pca->gpio.can_sleep = true; | |
228 | ||
229 | return devm_gpiochip_add_data(dev, &pca->gpio, pca); | |
230 | } | |
231 | #else | |
232 | static inline bool pca9685_pwm_is_gpio(struct pca9685 *pca, | |
233 | struct pwm_device *pwm) | |
234 | { | |
235 | return false; | |
236 | } | |
237 | ||
238 | static inline int pca9685_pwm_gpio_probe(struct pca9685 *pca) | |
239 | { | |
240 | return 0; | |
241 | } | |
242 | #endif | |
243 | ||
0829326a | 244 | static void pca9685_set_sleep_mode(struct pca9685 *pca, bool enable) |
c40c461e SVA |
245 | { |
246 | regmap_update_bits(pca->regmap, PCA9685_MODE1, | |
0829326a SVA |
247 | MODE1_SLEEP, enable ? MODE1_SLEEP : 0); |
248 | if (!enable) { | |
c40c461e SVA |
249 | /* Wait 500us for the oscillator to be back up */ |
250 | udelay(500); | |
251 | } | |
252 | } | |
253 | ||
88b613e6 ST |
254 | static int pca9685_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, |
255 | int duty_ns, int period_ns) | |
256 | { | |
257 | struct pca9685 *pca = to_pca(chip); | |
258 | unsigned long long duty; | |
259 | unsigned int reg; | |
01ec8472 CG |
260 | int prescale; |
261 | ||
262 | if (period_ns != pca->period_ns) { | |
263 | prescale = DIV_ROUND_CLOSEST(PCA9685_OSC_CLOCK_MHZ * period_ns, | |
264 | PCA9685_COUNTER_RANGE * 1000) - 1; | |
265 | ||
266 | if (prescale >= PCA9685_PRESCALE_MIN && | |
267 | prescale <= PCA9685_PRESCALE_MAX) { | |
c40c461e SVA |
268 | /* |
269 | * putting the chip briefly into SLEEP mode | |
270 | * at this point won't interfere with the | |
271 | * pm_runtime framework, because the pm_runtime | |
272 | * state is guaranteed active here. | |
273 | */ | |
01ec8472 | 274 | /* Put chip into sleep mode */ |
0829326a | 275 | pca9685_set_sleep_mode(pca, true); |
01ec8472 CG |
276 | |
277 | /* Change the chip-wide output frequency */ | |
278 | regmap_write(pca->regmap, PCA9685_PRESCALE, prescale); | |
279 | ||
280 | /* Wake the chip up */ | |
0829326a | 281 | pca9685_set_sleep_mode(pca, false); |
01ec8472 CG |
282 | |
283 | pca->period_ns = period_ns; | |
01ec8472 CG |
284 | } else { |
285 | dev_err(chip->dev, | |
286 | "prescaler not set: period out of bounds!\n"); | |
287 | return -EINVAL; | |
288 | } | |
289 | } | |
290 | ||
291 | pca->duty_ns = duty_ns; | |
88b613e6 ST |
292 | |
293 | if (duty_ns < 1) { | |
294 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
295 | reg = PCA9685_ALL_LED_OFF_H; | |
296 | else | |
297 | reg = LED_N_OFF_H(pwm->hwpwm); | |
298 | ||
299 | regmap_write(pca->regmap, reg, LED_FULL); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | if (duty_ns == period_ns) { | |
4a627b52 CG |
305 | /* Clear both OFF registers */ |
306 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
307 | reg = PCA9685_ALL_LED_OFF_L; | |
308 | else | |
309 | reg = LED_N_OFF_L(pwm->hwpwm); | |
310 | ||
311 | regmap_write(pca->regmap, reg, 0x0); | |
312 | ||
313 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
314 | reg = PCA9685_ALL_LED_OFF_H; | |
315 | else | |
316 | reg = LED_N_OFF_H(pwm->hwpwm); | |
317 | ||
318 | regmap_write(pca->regmap, reg, 0x0); | |
319 | ||
320 | /* Set the full ON bit */ | |
88b613e6 ST |
321 | if (pwm->hwpwm >= PCA9685_MAXCHAN) |
322 | reg = PCA9685_ALL_LED_ON_H; | |
323 | else | |
324 | reg = LED_N_ON_H(pwm->hwpwm); | |
325 | ||
326 | regmap_write(pca->regmap, reg, LED_FULL); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
01ec8472 | 331 | duty = PCA9685_COUNTER_RANGE * (unsigned long long)duty_ns; |
88b613e6 ST |
332 | duty = DIV_ROUND_UP_ULL(duty, period_ns); |
333 | ||
334 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
335 | reg = PCA9685_ALL_LED_OFF_L; | |
336 | else | |
337 | reg = LED_N_OFF_L(pwm->hwpwm); | |
338 | ||
339 | regmap_write(pca->regmap, reg, (int)duty & 0xff); | |
340 | ||
341 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
342 | reg = PCA9685_ALL_LED_OFF_H; | |
343 | else | |
344 | reg = LED_N_OFF_H(pwm->hwpwm); | |
345 | ||
346 | regmap_write(pca->regmap, reg, ((int)duty >> 8) & 0xf); | |
347 | ||
4a627b52 CG |
348 | /* Clear the full ON bit, otherwise the set OFF time has no effect */ |
349 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
350 | reg = PCA9685_ALL_LED_ON_H; | |
351 | else | |
352 | reg = LED_N_ON_H(pwm->hwpwm); | |
353 | ||
354 | regmap_write(pca->regmap, reg, 0); | |
355 | ||
88b613e6 ST |
356 | return 0; |
357 | } | |
358 | ||
359 | static int pca9685_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) | |
360 | { | |
361 | struct pca9685 *pca = to_pca(chip); | |
362 | unsigned int reg; | |
363 | ||
364 | /* | |
365 | * The PWM subsystem does not support a pre-delay. | |
366 | * So, set the ON-timeout to 0 | |
367 | */ | |
368 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
369 | reg = PCA9685_ALL_LED_ON_L; | |
370 | else | |
371 | reg = LED_N_ON_L(pwm->hwpwm); | |
372 | ||
373 | regmap_write(pca->regmap, reg, 0); | |
374 | ||
375 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
376 | reg = PCA9685_ALL_LED_ON_H; | |
377 | else | |
378 | reg = LED_N_ON_H(pwm->hwpwm); | |
379 | ||
380 | regmap_write(pca->regmap, reg, 0); | |
381 | ||
382 | /* | |
383 | * Clear the full-off bit. | |
384 | * It has precedence over the others and must be off. | |
385 | */ | |
386 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
387 | reg = PCA9685_ALL_LED_OFF_H; | |
388 | else | |
389 | reg = LED_N_OFF_H(pwm->hwpwm); | |
390 | ||
391 | regmap_update_bits(pca->regmap, reg, LED_FULL, 0x0); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static void pca9685_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) | |
397 | { | |
398 | struct pca9685 *pca = to_pca(chip); | |
399 | unsigned int reg; | |
400 | ||
401 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
402 | reg = PCA9685_ALL_LED_OFF_H; | |
403 | else | |
404 | reg = LED_N_OFF_H(pwm->hwpwm); | |
405 | ||
406 | regmap_write(pca->regmap, reg, LED_FULL); | |
407 | ||
408 | /* Clear the LED_OFF counter. */ | |
409 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
410 | reg = PCA9685_ALL_LED_OFF_L; | |
411 | else | |
412 | reg = LED_N_OFF_L(pwm->hwpwm); | |
413 | ||
414 | regmap_write(pca->regmap, reg, 0x0); | |
415 | } | |
416 | ||
417 | static int pca9685_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) | |
418 | { | |
419 | struct pca9685 *pca = to_pca(chip); | |
420 | ||
bccec89f MW |
421 | if (pca9685_pwm_is_gpio(pca, pwm)) |
422 | return -EBUSY; | |
c40c461e | 423 | pm_runtime_get_sync(chip->dev); |
88b613e6 ST |
424 | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static void pca9685_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) | |
429 | { | |
c40c461e SVA |
430 | pca9685_pwm_disable(chip, pwm); |
431 | pm_runtime_put(chip->dev); | |
88b613e6 ST |
432 | } |
433 | ||
434 | static const struct pwm_ops pca9685_pwm_ops = { | |
435 | .enable = pca9685_pwm_enable, | |
436 | .disable = pca9685_pwm_disable, | |
437 | .config = pca9685_pwm_config, | |
438 | .request = pca9685_pwm_request, | |
439 | .free = pca9685_pwm_free, | |
3dd0a909 | 440 | .owner = THIS_MODULE, |
88b613e6 ST |
441 | }; |
442 | ||
c456fbb2 | 443 | static const struct regmap_config pca9685_regmap_i2c_config = { |
88b613e6 ST |
444 | .reg_bits = 8, |
445 | .val_bits = 8, | |
446 | .max_register = PCA9685_NUMREGS, | |
447 | .cache_type = REGCACHE_NONE, | |
448 | }; | |
449 | ||
450 | static int pca9685_pwm_probe(struct i2c_client *client, | |
451 | const struct i2c_device_id *id) | |
452 | { | |
88b613e6 ST |
453 | struct pca9685 *pca; |
454 | int ret; | |
455 | int mode2; | |
456 | ||
457 | pca = devm_kzalloc(&client->dev, sizeof(*pca), GFP_KERNEL); | |
458 | if (!pca) | |
459 | return -ENOMEM; | |
460 | ||
461 | pca->regmap = devm_regmap_init_i2c(client, &pca9685_regmap_i2c_config); | |
462 | if (IS_ERR(pca->regmap)) { | |
463 | ret = PTR_ERR(pca->regmap); | |
464 | dev_err(&client->dev, "Failed to initialize register map: %d\n", | |
465 | ret); | |
466 | return ret; | |
467 | } | |
01ec8472 CG |
468 | pca->duty_ns = 0; |
469 | pca->period_ns = PCA9685_DEFAULT_PERIOD; | |
88b613e6 ST |
470 | |
471 | i2c_set_clientdata(client, pca); | |
472 | ||
473 | regmap_read(pca->regmap, PCA9685_MODE2, &mode2); | |
474 | ||
912b8439 | 475 | if (device_property_read_bool(&client->dev, "invert")) |
88b613e6 ST |
476 | mode2 |= MODE2_INVRT; |
477 | else | |
478 | mode2 &= ~MODE2_INVRT; | |
479 | ||
912b8439 | 480 | if (device_property_read_bool(&client->dev, "open-drain")) |
88b613e6 ST |
481 | mode2 &= ~MODE2_OUTDRV; |
482 | else | |
483 | mode2 |= MODE2_OUTDRV; | |
484 | ||
485 | regmap_write(pca->regmap, PCA9685_MODE2, mode2); | |
486 | ||
487 | /* clear all "full off" bits */ | |
488 | regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_L, 0); | |
489 | regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_H, 0); | |
490 | ||
491 | pca->chip.ops = &pca9685_pwm_ops; | |
492 | /* add an extra channel for ALL_LED */ | |
493 | pca->chip.npwm = PCA9685_MAXCHAN + 1; | |
494 | ||
495 | pca->chip.dev = &client->dev; | |
496 | pca->chip.base = -1; | |
88b613e6 | 497 | |
bccec89f MW |
498 | ret = pwmchip_add(&pca->chip); |
499 | if (ret < 0) | |
500 | return ret; | |
501 | ||
502 | ret = pca9685_pwm_gpio_probe(pca); | |
c40c461e | 503 | if (ret < 0) { |
bccec89f | 504 | pwmchip_remove(&pca->chip); |
c40c461e SVA |
505 | return ret; |
506 | } | |
507 | ||
508 | /* the chip comes out of power-up in the active state */ | |
509 | pm_runtime_set_active(&client->dev); | |
510 | /* | |
511 | * enable will put the chip into suspend, which is what we | |
512 | * want as all outputs are disabled at this point | |
513 | */ | |
514 | pm_runtime_enable(&client->dev); | |
bccec89f | 515 | |
c40c461e | 516 | return 0; |
88b613e6 ST |
517 | } |
518 | ||
519 | static int pca9685_pwm_remove(struct i2c_client *client) | |
520 | { | |
521 | struct pca9685 *pca = i2c_get_clientdata(client); | |
c40c461e | 522 | int ret; |
88b613e6 | 523 | |
c40c461e SVA |
524 | ret = pwmchip_remove(&pca->chip); |
525 | if (ret) | |
526 | return ret; | |
527 | pm_runtime_disable(&client->dev); | |
528 | return 0; | |
529 | } | |
88b613e6 | 530 | |
c40c461e SVA |
531 | #ifdef CONFIG_PM |
532 | static int pca9685_pwm_runtime_suspend(struct device *dev) | |
533 | { | |
534 | struct i2c_client *client = to_i2c_client(dev); | |
535 | struct pca9685 *pca = i2c_get_clientdata(client); | |
536 | ||
0829326a | 537 | pca9685_set_sleep_mode(pca, true); |
c40c461e | 538 | return 0; |
88b613e6 ST |
539 | } |
540 | ||
c40c461e SVA |
541 | static int pca9685_pwm_runtime_resume(struct device *dev) |
542 | { | |
543 | struct i2c_client *client = to_i2c_client(dev); | |
544 | struct pca9685 *pca = i2c_get_clientdata(client); | |
545 | ||
0829326a | 546 | pca9685_set_sleep_mode(pca, false); |
c40c461e SVA |
547 | return 0; |
548 | } | |
549 | #endif | |
550 | ||
88b613e6 ST |
551 | static const struct i2c_device_id pca9685_id[] = { |
552 | { "pca9685", 0 }, | |
553 | { /* sentinel */ }, | |
554 | }; | |
555 | MODULE_DEVICE_TABLE(i2c, pca9685_id); | |
556 | ||
912b8439 AS |
557 | #ifdef CONFIG_ACPI |
558 | static const struct acpi_device_id pca9685_acpi_ids[] = { | |
559 | { "INT3492", 0 }, | |
560 | { /* sentinel */ }, | |
561 | }; | |
562 | MODULE_DEVICE_TABLE(acpi, pca9685_acpi_ids); | |
563 | #endif | |
564 | ||
565 | #ifdef CONFIG_OF | |
88b613e6 ST |
566 | static const struct of_device_id pca9685_dt_ids[] = { |
567 | { .compatible = "nxp,pca9685-pwm", }, | |
568 | { /* sentinel */ } | |
569 | }; | |
570 | MODULE_DEVICE_TABLE(of, pca9685_dt_ids); | |
912b8439 | 571 | #endif |
88b613e6 | 572 | |
c40c461e SVA |
573 | static const struct dev_pm_ops pca9685_pwm_pm = { |
574 | SET_RUNTIME_PM_OPS(pca9685_pwm_runtime_suspend, | |
575 | pca9685_pwm_runtime_resume, NULL) | |
576 | }; | |
577 | ||
88b613e6 ST |
578 | static struct i2c_driver pca9685_i2c_driver = { |
579 | .driver = { | |
580 | .name = "pca9685-pwm", | |
912b8439 AS |
581 | .acpi_match_table = ACPI_PTR(pca9685_acpi_ids), |
582 | .of_match_table = of_match_ptr(pca9685_dt_ids), | |
c40c461e | 583 | .pm = &pca9685_pwm_pm, |
88b613e6 ST |
584 | }, |
585 | .probe = pca9685_pwm_probe, | |
586 | .remove = pca9685_pwm_remove, | |
587 | .id_table = pca9685_id, | |
588 | }; | |
589 | ||
590 | module_i2c_driver(pca9685_i2c_driver); | |
591 | ||
592 | MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de>"); | |
593 | MODULE_DESCRIPTION("PWM driver for PCA9685"); | |
594 | MODULE_LICENSE("GPL"); |