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 CG |
32 | #include <linux/delay.h> |
33 | ||
34 | /* | |
35 | * Because the PCA9685 has only one prescaler per chip, changing the period of | |
36 | * one channel affects the period of all 16 PWM outputs! | |
37 | * However, the ratio between each configured duty cycle and the chip-wide | |
38 | * period remains constant, because the OFF time is set in proportion to the | |
39 | * counter range. | |
40 | */ | |
88b613e6 ST |
41 | |
42 | #define PCA9685_MODE1 0x00 | |
43 | #define PCA9685_MODE2 0x01 | |
44 | #define PCA9685_SUBADDR1 0x02 | |
45 | #define PCA9685_SUBADDR2 0x03 | |
46 | #define PCA9685_SUBADDR3 0x04 | |
47 | #define PCA9685_ALLCALLADDR 0x05 | |
48 | #define PCA9685_LEDX_ON_L 0x06 | |
49 | #define PCA9685_LEDX_ON_H 0x07 | |
50 | #define PCA9685_LEDX_OFF_L 0x08 | |
51 | #define PCA9685_LEDX_OFF_H 0x09 | |
52 | ||
53 | #define PCA9685_ALL_LED_ON_L 0xFA | |
54 | #define PCA9685_ALL_LED_ON_H 0xFB | |
55 | #define PCA9685_ALL_LED_OFF_L 0xFC | |
56 | #define PCA9685_ALL_LED_OFF_H 0xFD | |
57 | #define PCA9685_PRESCALE 0xFE | |
58 | ||
01ec8472 CG |
59 | #define PCA9685_PRESCALE_MIN 0x03 /* => max. frequency of 1526 Hz */ |
60 | #define PCA9685_PRESCALE_MAX 0xFF /* => min. frequency of 24 Hz */ | |
61 | ||
62 | #define PCA9685_COUNTER_RANGE 4096 | |
63 | #define PCA9685_DEFAULT_PERIOD 5000000 /* Default period_ns = 1/200 Hz */ | |
64 | #define PCA9685_OSC_CLOCK_MHZ 25 /* Internal oscillator with 25 MHz */ | |
65 | ||
88b613e6 ST |
66 | #define PCA9685_NUMREGS 0xFF |
67 | #define PCA9685_MAXCHAN 0x10 | |
68 | ||
69 | #define LED_FULL (1 << 4) | |
70 | #define MODE1_SLEEP (1 << 4) | |
71 | #define MODE2_INVRT (1 << 4) | |
72 | #define MODE2_OUTDRV (1 << 2) | |
73 | ||
74 | #define LED_N_ON_H(N) (PCA9685_LEDX_ON_H + (4 * (N))) | |
75 | #define LED_N_ON_L(N) (PCA9685_LEDX_ON_L + (4 * (N))) | |
76 | #define LED_N_OFF_H(N) (PCA9685_LEDX_OFF_H + (4 * (N))) | |
77 | #define LED_N_OFF_L(N) (PCA9685_LEDX_OFF_L + (4 * (N))) | |
78 | ||
79 | struct pca9685 { | |
80 | struct pwm_chip chip; | |
81 | struct regmap *regmap; | |
82 | int active_cnt; | |
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); | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static void pca9685_pwm_gpio_free(struct gpio_chip *gpio, unsigned int offset) | |
118 | { | |
119 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
120 | struct pwm_device *pwm; | |
121 | ||
122 | mutex_lock(&pca->lock); | |
123 | pwm = &pca->chip.pwms[offset]; | |
124 | pwm_set_chip_data(pwm, NULL); | |
125 | mutex_unlock(&pca->lock); | |
126 | } | |
127 | ||
128 | static bool pca9685_pwm_is_gpio(struct pca9685 *pca, struct pwm_device *pwm) | |
129 | { | |
130 | bool is_gpio = false; | |
131 | ||
132 | mutex_lock(&pca->lock); | |
133 | ||
134 | if (pwm->hwpwm >= PCA9685_MAXCHAN) { | |
135 | unsigned int i; | |
136 | ||
137 | /* | |
138 | * Check if any of the GPIOs are requested and in that case | |
139 | * prevent using the "all LEDs" channel. | |
140 | */ | |
141 | for (i = 0; i < pca->gpio.ngpio; i++) | |
142 | if (gpiochip_is_requested(&pca->gpio, i)) { | |
143 | is_gpio = true; | |
144 | break; | |
145 | } | |
146 | } else if (pwm_get_chip_data(pwm)) { | |
147 | is_gpio = true; | |
148 | } | |
149 | ||
150 | mutex_unlock(&pca->lock); | |
151 | return is_gpio; | |
152 | } | |
153 | ||
154 | static int pca9685_pwm_gpio_get(struct gpio_chip *gpio, unsigned int offset) | |
155 | { | |
156 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
157 | struct pwm_device *pwm = &pca->chip.pwms[offset]; | |
158 | unsigned int value; | |
159 | ||
160 | regmap_read(pca->regmap, LED_N_ON_H(pwm->hwpwm), &value); | |
161 | ||
162 | return value & LED_FULL; | |
163 | } | |
164 | ||
165 | static void pca9685_pwm_gpio_set(struct gpio_chip *gpio, unsigned int offset, | |
166 | int value) | |
167 | { | |
168 | struct pca9685 *pca = gpiochip_get_data(gpio); | |
169 | struct pwm_device *pwm = &pca->chip.pwms[offset]; | |
170 | unsigned int on = value ? LED_FULL : 0; | |
171 | ||
172 | /* Clear both OFF registers */ | |
173 | regmap_write(pca->regmap, LED_N_OFF_L(pwm->hwpwm), 0); | |
174 | regmap_write(pca->regmap, LED_N_OFF_H(pwm->hwpwm), 0); | |
175 | ||
176 | /* Set the full ON bit */ | |
177 | regmap_write(pca->regmap, LED_N_ON_H(pwm->hwpwm), on); | |
178 | } | |
179 | ||
180 | static int pca9685_pwm_gpio_get_direction(struct gpio_chip *chip, | |
181 | unsigned int offset) | |
182 | { | |
183 | /* Always out */ | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static int pca9685_pwm_gpio_direction_input(struct gpio_chip *gpio, | |
188 | unsigned int offset) | |
189 | { | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | static int pca9685_pwm_gpio_direction_output(struct gpio_chip *gpio, | |
194 | unsigned int offset, int value) | |
195 | { | |
196 | pca9685_pwm_gpio_set(gpio, offset, value); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
202 | * The PCA9685 has a bit for turning the PWM output full off or on. Some | |
203 | * boards like Intel Galileo actually uses these as normal GPIOs so we | |
204 | * expose a GPIO chip here which can exclusively take over the underlying | |
205 | * PWM channel. | |
206 | */ | |
207 | static int pca9685_pwm_gpio_probe(struct pca9685 *pca) | |
208 | { | |
209 | struct device *dev = pca->chip.dev; | |
210 | ||
211 | mutex_init(&pca->lock); | |
212 | ||
213 | pca->gpio.label = dev_name(dev); | |
214 | pca->gpio.parent = dev; | |
215 | pca->gpio.request = pca9685_pwm_gpio_request; | |
216 | pca->gpio.free = pca9685_pwm_gpio_free; | |
217 | pca->gpio.get_direction = pca9685_pwm_gpio_get_direction; | |
218 | pca->gpio.direction_input = pca9685_pwm_gpio_direction_input; | |
219 | pca->gpio.direction_output = pca9685_pwm_gpio_direction_output; | |
220 | pca->gpio.get = pca9685_pwm_gpio_get; | |
221 | pca->gpio.set = pca9685_pwm_gpio_set; | |
222 | pca->gpio.base = -1; | |
223 | pca->gpio.ngpio = PCA9685_MAXCHAN; | |
224 | pca->gpio.can_sleep = true; | |
225 | ||
226 | return devm_gpiochip_add_data(dev, &pca->gpio, pca); | |
227 | } | |
228 | #else | |
229 | static inline bool pca9685_pwm_is_gpio(struct pca9685 *pca, | |
230 | struct pwm_device *pwm) | |
231 | { | |
232 | return false; | |
233 | } | |
234 | ||
235 | static inline int pca9685_pwm_gpio_probe(struct pca9685 *pca) | |
236 | { | |
237 | return 0; | |
238 | } | |
239 | #endif | |
240 | ||
88b613e6 ST |
241 | static int pca9685_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, |
242 | int duty_ns, int period_ns) | |
243 | { | |
244 | struct pca9685 *pca = to_pca(chip); | |
245 | unsigned long long duty; | |
246 | unsigned int reg; | |
01ec8472 CG |
247 | int prescale; |
248 | ||
249 | if (period_ns != pca->period_ns) { | |
250 | prescale = DIV_ROUND_CLOSEST(PCA9685_OSC_CLOCK_MHZ * period_ns, | |
251 | PCA9685_COUNTER_RANGE * 1000) - 1; | |
252 | ||
253 | if (prescale >= PCA9685_PRESCALE_MIN && | |
254 | prescale <= PCA9685_PRESCALE_MAX) { | |
255 | /* Put chip into sleep mode */ | |
256 | regmap_update_bits(pca->regmap, PCA9685_MODE1, | |
257 | MODE1_SLEEP, MODE1_SLEEP); | |
258 | ||
259 | /* Change the chip-wide output frequency */ | |
260 | regmap_write(pca->regmap, PCA9685_PRESCALE, prescale); | |
261 | ||
262 | /* Wake the chip up */ | |
263 | regmap_update_bits(pca->regmap, PCA9685_MODE1, | |
264 | MODE1_SLEEP, 0x0); | |
265 | ||
266 | /* Wait 500us for the oscillator to be back up */ | |
267 | udelay(500); | |
268 | ||
269 | pca->period_ns = period_ns; | |
01ec8472 CG |
270 | } else { |
271 | dev_err(chip->dev, | |
272 | "prescaler not set: period out of bounds!\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | } | |
276 | ||
277 | pca->duty_ns = duty_ns; | |
88b613e6 ST |
278 | |
279 | if (duty_ns < 1) { | |
280 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
281 | reg = PCA9685_ALL_LED_OFF_H; | |
282 | else | |
283 | reg = LED_N_OFF_H(pwm->hwpwm); | |
284 | ||
285 | regmap_write(pca->regmap, reg, LED_FULL); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | if (duty_ns == period_ns) { | |
4a627b52 CG |
291 | /* Clear both OFF registers */ |
292 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
293 | reg = PCA9685_ALL_LED_OFF_L; | |
294 | else | |
295 | reg = LED_N_OFF_L(pwm->hwpwm); | |
296 | ||
297 | regmap_write(pca->regmap, reg, 0x0); | |
298 | ||
299 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
300 | reg = PCA9685_ALL_LED_OFF_H; | |
301 | else | |
302 | reg = LED_N_OFF_H(pwm->hwpwm); | |
303 | ||
304 | regmap_write(pca->regmap, reg, 0x0); | |
305 | ||
306 | /* Set the full ON bit */ | |
88b613e6 ST |
307 | if (pwm->hwpwm >= PCA9685_MAXCHAN) |
308 | reg = PCA9685_ALL_LED_ON_H; | |
309 | else | |
310 | reg = LED_N_ON_H(pwm->hwpwm); | |
311 | ||
312 | regmap_write(pca->regmap, reg, LED_FULL); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
01ec8472 | 317 | duty = PCA9685_COUNTER_RANGE * (unsigned long long)duty_ns; |
88b613e6 ST |
318 | duty = DIV_ROUND_UP_ULL(duty, period_ns); |
319 | ||
320 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
321 | reg = PCA9685_ALL_LED_OFF_L; | |
322 | else | |
323 | reg = LED_N_OFF_L(pwm->hwpwm); | |
324 | ||
325 | regmap_write(pca->regmap, reg, (int)duty & 0xff); | |
326 | ||
327 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
328 | reg = PCA9685_ALL_LED_OFF_H; | |
329 | else | |
330 | reg = LED_N_OFF_H(pwm->hwpwm); | |
331 | ||
332 | regmap_write(pca->regmap, reg, ((int)duty >> 8) & 0xf); | |
333 | ||
4a627b52 CG |
334 | /* Clear the full ON bit, otherwise the set OFF time has no effect */ |
335 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
336 | reg = PCA9685_ALL_LED_ON_H; | |
337 | else | |
338 | reg = LED_N_ON_H(pwm->hwpwm); | |
339 | ||
340 | regmap_write(pca->regmap, reg, 0); | |
341 | ||
88b613e6 ST |
342 | return 0; |
343 | } | |
344 | ||
345 | static int pca9685_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) | |
346 | { | |
347 | struct pca9685 *pca = to_pca(chip); | |
348 | unsigned int reg; | |
349 | ||
350 | /* | |
351 | * The PWM subsystem does not support a pre-delay. | |
352 | * So, set the ON-timeout to 0 | |
353 | */ | |
354 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
355 | reg = PCA9685_ALL_LED_ON_L; | |
356 | else | |
357 | reg = LED_N_ON_L(pwm->hwpwm); | |
358 | ||
359 | regmap_write(pca->regmap, reg, 0); | |
360 | ||
361 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
362 | reg = PCA9685_ALL_LED_ON_H; | |
363 | else | |
364 | reg = LED_N_ON_H(pwm->hwpwm); | |
365 | ||
366 | regmap_write(pca->regmap, reg, 0); | |
367 | ||
368 | /* | |
369 | * Clear the full-off bit. | |
370 | * It has precedence over the others and must be off. | |
371 | */ | |
372 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
373 | reg = PCA9685_ALL_LED_OFF_H; | |
374 | else | |
375 | reg = LED_N_OFF_H(pwm->hwpwm); | |
376 | ||
377 | regmap_update_bits(pca->regmap, reg, LED_FULL, 0x0); | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static void pca9685_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) | |
383 | { | |
384 | struct pca9685 *pca = to_pca(chip); | |
385 | unsigned int reg; | |
386 | ||
387 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
388 | reg = PCA9685_ALL_LED_OFF_H; | |
389 | else | |
390 | reg = LED_N_OFF_H(pwm->hwpwm); | |
391 | ||
392 | regmap_write(pca->regmap, reg, LED_FULL); | |
393 | ||
394 | /* Clear the LED_OFF counter. */ | |
395 | if (pwm->hwpwm >= PCA9685_MAXCHAN) | |
396 | reg = PCA9685_ALL_LED_OFF_L; | |
397 | else | |
398 | reg = LED_N_OFF_L(pwm->hwpwm); | |
399 | ||
400 | regmap_write(pca->regmap, reg, 0x0); | |
401 | } | |
402 | ||
403 | static int pca9685_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) | |
404 | { | |
405 | struct pca9685 *pca = to_pca(chip); | |
406 | ||
bccec89f MW |
407 | if (pca9685_pwm_is_gpio(pca, pwm)) |
408 | return -EBUSY; | |
409 | ||
88b613e6 ST |
410 | if (pca->active_cnt++ == 0) |
411 | return regmap_update_bits(pca->regmap, PCA9685_MODE1, | |
412 | MODE1_SLEEP, 0x0); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | static void pca9685_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) | |
418 | { | |
419 | struct pca9685 *pca = to_pca(chip); | |
420 | ||
421 | if (--pca->active_cnt == 0) | |
422 | regmap_update_bits(pca->regmap, PCA9685_MODE1, MODE1_SLEEP, | |
fed1bf8d | 423 | MODE1_SLEEP); |
88b613e6 ST |
424 | } |
425 | ||
426 | static const struct pwm_ops pca9685_pwm_ops = { | |
427 | .enable = pca9685_pwm_enable, | |
428 | .disable = pca9685_pwm_disable, | |
429 | .config = pca9685_pwm_config, | |
430 | .request = pca9685_pwm_request, | |
431 | .free = pca9685_pwm_free, | |
3dd0a909 | 432 | .owner = THIS_MODULE, |
88b613e6 ST |
433 | }; |
434 | ||
c456fbb2 | 435 | static const struct regmap_config pca9685_regmap_i2c_config = { |
88b613e6 ST |
436 | .reg_bits = 8, |
437 | .val_bits = 8, | |
438 | .max_register = PCA9685_NUMREGS, | |
439 | .cache_type = REGCACHE_NONE, | |
440 | }; | |
441 | ||
442 | static int pca9685_pwm_probe(struct i2c_client *client, | |
443 | const struct i2c_device_id *id) | |
444 | { | |
88b613e6 ST |
445 | struct pca9685 *pca; |
446 | int ret; | |
447 | int mode2; | |
448 | ||
449 | pca = devm_kzalloc(&client->dev, sizeof(*pca), GFP_KERNEL); | |
450 | if (!pca) | |
451 | return -ENOMEM; | |
452 | ||
453 | pca->regmap = devm_regmap_init_i2c(client, &pca9685_regmap_i2c_config); | |
454 | if (IS_ERR(pca->regmap)) { | |
455 | ret = PTR_ERR(pca->regmap); | |
456 | dev_err(&client->dev, "Failed to initialize register map: %d\n", | |
457 | ret); | |
458 | return ret; | |
459 | } | |
01ec8472 CG |
460 | pca->duty_ns = 0; |
461 | pca->period_ns = PCA9685_DEFAULT_PERIOD; | |
88b613e6 ST |
462 | |
463 | i2c_set_clientdata(client, pca); | |
464 | ||
465 | regmap_read(pca->regmap, PCA9685_MODE2, &mode2); | |
466 | ||
912b8439 | 467 | if (device_property_read_bool(&client->dev, "invert")) |
88b613e6 ST |
468 | mode2 |= MODE2_INVRT; |
469 | else | |
470 | mode2 &= ~MODE2_INVRT; | |
471 | ||
912b8439 | 472 | if (device_property_read_bool(&client->dev, "open-drain")) |
88b613e6 ST |
473 | mode2 &= ~MODE2_OUTDRV; |
474 | else | |
475 | mode2 |= MODE2_OUTDRV; | |
476 | ||
477 | regmap_write(pca->regmap, PCA9685_MODE2, mode2); | |
478 | ||
479 | /* clear all "full off" bits */ | |
480 | regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_L, 0); | |
481 | regmap_write(pca->regmap, PCA9685_ALL_LED_OFF_H, 0); | |
482 | ||
483 | pca->chip.ops = &pca9685_pwm_ops; | |
484 | /* add an extra channel for ALL_LED */ | |
485 | pca->chip.npwm = PCA9685_MAXCHAN + 1; | |
486 | ||
487 | pca->chip.dev = &client->dev; | |
488 | pca->chip.base = -1; | |
88b613e6 | 489 | |
bccec89f MW |
490 | ret = pwmchip_add(&pca->chip); |
491 | if (ret < 0) | |
492 | return ret; | |
493 | ||
494 | ret = pca9685_pwm_gpio_probe(pca); | |
495 | if (ret < 0) | |
496 | pwmchip_remove(&pca->chip); | |
497 | ||
498 | return ret; | |
88b613e6 ST |
499 | } |
500 | ||
501 | static int pca9685_pwm_remove(struct i2c_client *client) | |
502 | { | |
503 | struct pca9685 *pca = i2c_get_clientdata(client); | |
504 | ||
fed1bf8d AL |
505 | regmap_update_bits(pca->regmap, PCA9685_MODE1, MODE1_SLEEP, |
506 | MODE1_SLEEP); | |
88b613e6 ST |
507 | |
508 | return pwmchip_remove(&pca->chip); | |
509 | } | |
510 | ||
511 | static const struct i2c_device_id pca9685_id[] = { | |
512 | { "pca9685", 0 }, | |
513 | { /* sentinel */ }, | |
514 | }; | |
515 | MODULE_DEVICE_TABLE(i2c, pca9685_id); | |
516 | ||
912b8439 AS |
517 | #ifdef CONFIG_ACPI |
518 | static const struct acpi_device_id pca9685_acpi_ids[] = { | |
519 | { "INT3492", 0 }, | |
520 | { /* sentinel */ }, | |
521 | }; | |
522 | MODULE_DEVICE_TABLE(acpi, pca9685_acpi_ids); | |
523 | #endif | |
524 | ||
525 | #ifdef CONFIG_OF | |
88b613e6 ST |
526 | static const struct of_device_id pca9685_dt_ids[] = { |
527 | { .compatible = "nxp,pca9685-pwm", }, | |
528 | { /* sentinel */ } | |
529 | }; | |
530 | MODULE_DEVICE_TABLE(of, pca9685_dt_ids); | |
912b8439 | 531 | #endif |
88b613e6 ST |
532 | |
533 | static struct i2c_driver pca9685_i2c_driver = { | |
534 | .driver = { | |
535 | .name = "pca9685-pwm", | |
912b8439 AS |
536 | .acpi_match_table = ACPI_PTR(pca9685_acpi_ids), |
537 | .of_match_table = of_match_ptr(pca9685_dt_ids), | |
88b613e6 ST |
538 | }, |
539 | .probe = pca9685_pwm_probe, | |
540 | .remove = pca9685_pwm_remove, | |
541 | .id_table = pca9685_id, | |
542 | }; | |
543 | ||
544 | module_i2c_driver(pca9685_i2c_driver); | |
545 | ||
546 | MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de>"); | |
547 | MODULE_DESCRIPTION("PWM driver for PCA9685"); | |
548 | MODULE_LICENSE("GPL"); |