Commit | Line | Data |
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b886d83c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e14fa824 RV |
2 | /* |
3 | * pca9532.c - 16-bit Led dimmer | |
4 | * | |
3dbf622c | 5 | * Copyright (C) 2011 Jan Weitzel |
b26e0ed4 | 6 | * Copyright (C) 2008 Riku Voipio |
e14fa824 | 7 | * |
3dbf622c | 8 | * Datasheet: http://www.nxp.com/documents/data_sheet/PCA9532.pdf |
e14fa824 RV |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/i2c.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
e14fa824 RV |
14 | #include <linux/leds.h> |
15 | #include <linux/input.h> | |
16 | #include <linux/mutex.h> | |
934cd3f9 | 17 | #include <linux/workqueue.h> |
e14fa824 | 18 | #include <linux/leds-pca9532.h> |
3881a72f | 19 | #include <linux/gpio/driver.h> |
fa4191a6 PR |
20 | #include <linux/of.h> |
21 | #include <linux/of_device.h> | |
e14fa824 | 22 | |
3dbf622c JW |
23 | /* m = num_leds*/ |
24 | #define PCA9532_REG_INPUT(i) ((i) >> 3) | |
25 | #define PCA9532_REG_OFFSET(m) ((m) >> 4) | |
26 | #define PCA9532_REG_PSC(m, i) (PCA9532_REG_OFFSET(m) + 0x1 + (i) * 2) | |
27 | #define PCA9532_REG_PWM(m, i) (PCA9532_REG_OFFSET(m) + 0x2 + (i) * 2) | |
28 | #define LED_REG(m, led) (PCA9532_REG_OFFSET(m) + 0x5 + (led >> 2)) | |
29 | #define LED_NUM(led) (led & 0x3) | |
2a378856 MM |
30 | #define LED_SHIFT(led) (LED_NUM(led) * 2) |
31 | #define LED_MASK(led) (0x3 << LED_SHIFT(led)) | |
e14fa824 RV |
32 | |
33 | #define ldev_to_led(c) container_of(c, struct pca9532_led, ldev) | |
34 | ||
3dbf622c JW |
35 | struct pca9532_chip_info { |
36 | u8 num_leds; | |
37 | }; | |
38 | ||
e14fa824 RV |
39 | struct pca9532_data { |
40 | struct i2c_client *client; | |
41 | struct pca9532_led leds[16]; | |
42 | struct mutex update_lock; | |
85c5204a | 43 | struct input_dev *idev; |
07172d2b | 44 | struct work_struct work; |
3c1ab50d JE |
45 | #ifdef CONFIG_LEDS_PCA9532_GPIO |
46 | struct gpio_chip gpio; | |
47 | #endif | |
3dbf622c | 48 | const struct pca9532_chip_info *chip_info; |
e14fa824 RV |
49 | u8 pwm[2]; |
50 | u8 psc[2]; | |
51 | }; | |
52 | ||
53 | static int pca9532_probe(struct i2c_client *client, | |
54 | const struct i2c_device_id *id); | |
55 | static int pca9532_remove(struct i2c_client *client); | |
56 | ||
3dbf622c JW |
57 | enum { |
58 | pca9530, | |
59 | pca9531, | |
60 | pca9532, | |
61 | pca9533, | |
62 | }; | |
63 | ||
e14fa824 | 64 | static const struct i2c_device_id pca9532_id[] = { |
3dbf622c JW |
65 | { "pca9530", pca9530 }, |
66 | { "pca9531", pca9531 }, | |
67 | { "pca9532", pca9532 }, | |
68 | { "pca9533", pca9533 }, | |
e14fa824 RV |
69 | { } |
70 | }; | |
71 | ||
72 | MODULE_DEVICE_TABLE(i2c, pca9532_id); | |
73 | ||
3dbf622c JW |
74 | static const struct pca9532_chip_info pca9532_chip_info_tbl[] = { |
75 | [pca9530] = { | |
76 | .num_leds = 2, | |
77 | }, | |
78 | [pca9531] = { | |
79 | .num_leds = 8, | |
80 | }, | |
81 | [pca9532] = { | |
82 | .num_leds = 16, | |
83 | }, | |
84 | [pca9533] = { | |
85 | .num_leds = 4, | |
86 | }, | |
87 | }; | |
88 | ||
fa4191a6 PR |
89 | #ifdef CONFIG_OF |
90 | static const struct of_device_id of_pca9532_leds_match[] = { | |
91 | { .compatible = "nxp,pca9530", .data = (void *)pca9530 }, | |
92 | { .compatible = "nxp,pca9531", .data = (void *)pca9531 }, | |
93 | { .compatible = "nxp,pca9532", .data = (void *)pca9532 }, | |
94 | { .compatible = "nxp,pca9533", .data = (void *)pca9533 }, | |
95 | {}, | |
96 | }; | |
97 | ||
98 | MODULE_DEVICE_TABLE(of, of_pca9532_leds_match); | |
99 | #endif | |
100 | ||
e14fa824 RV |
101 | static struct i2c_driver pca9532_driver = { |
102 | .driver = { | |
30cb35be | 103 | .name = "leds-pca953x", |
fa4191a6 | 104 | .of_match_table = of_match_ptr(of_pca9532_leds_match), |
e14fa824 | 105 | }, |
85c5204a | 106 | .probe = pca9532_probe, |
e14fa824 RV |
107 | .remove = pca9532_remove, |
108 | .id_table = pca9532_id, | |
109 | }; | |
110 | ||
25985edc | 111 | /* We have two pwm/blinkers, but 16 possible leds to drive. Additionally, |
e14fa824 RV |
112 | * the clever Thecus people are using one pwm to drive the beeper. So, |
113 | * as a compromise we average one pwm to the values requested by all | |
114 | * leds that are not ON/OFF. | |
115 | * */ | |
934cd3f9 | 116 | static int pca9532_calcpwm(struct i2c_client *client, int pwm, int blink, |
e14fa824 RV |
117 | enum led_brightness value) |
118 | { | |
119 | int a = 0, b = 0, i = 0; | |
120 | struct pca9532_data *data = i2c_get_clientdata(client); | |
3dbf622c | 121 | for (i = 0; i < data->chip_info->num_leds; i++) { |
e14fa824 RV |
122 | if (data->leds[i].type == PCA9532_TYPE_LED && |
123 | data->leds[i].state == PCA9532_PWM0+pwm) { | |
124 | a++; | |
125 | b += data->leds[i].ldev.brightness; | |
126 | } | |
127 | } | |
128 | if (a == 0) { | |
129 | dev_err(&client->dev, | |
130 | "fear of division by zero %d/%d, wanted %d\n", | |
131 | b, a, value); | |
132 | return -EINVAL; | |
133 | } | |
134 | b = b/a; | |
135 | if (b > 0xFF) | |
136 | return -EINVAL; | |
e14fa824 | 137 | data->pwm[pwm] = b; |
07172d2b AO |
138 | data->psc[pwm] = blink; |
139 | return 0; | |
934cd3f9 RV |
140 | } |
141 | ||
142 | static int pca9532_setpwm(struct i2c_client *client, int pwm) | |
143 | { | |
07172d2b | 144 | struct pca9532_data *data = i2c_get_clientdata(client); |
3dbf622c JW |
145 | u8 maxleds = data->chip_info->num_leds; |
146 | ||
07172d2b | 147 | mutex_lock(&data->update_lock); |
3dbf622c | 148 | i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, pwm), |
e14fa824 | 149 | data->pwm[pwm]); |
3dbf622c | 150 | i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, pwm), |
e14fa824 RV |
151 | data->psc[pwm]); |
152 | mutex_unlock(&data->update_lock); | |
153 | return 0; | |
154 | } | |
155 | ||
156 | /* Set LED routing */ | |
157 | static void pca9532_setled(struct pca9532_led *led) | |
158 | { | |
159 | struct i2c_client *client = led->client; | |
160 | struct pca9532_data *data = i2c_get_clientdata(client); | |
3dbf622c | 161 | u8 maxleds = data->chip_info->num_leds; |
e14fa824 RV |
162 | char reg; |
163 | ||
164 | mutex_lock(&data->update_lock); | |
3dbf622c | 165 | reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id)); |
e14fa824 | 166 | /* zero led bits */ |
2a378856 | 167 | reg = reg & ~LED_MASK(led->id); |
e14fa824 | 168 | /* set the new value */ |
2a378856 | 169 | reg = reg | (led->state << LED_SHIFT(led->id)); |
3dbf622c | 170 | i2c_smbus_write_byte_data(client, LED_REG(maxleds, led->id), reg); |
e14fa824 RV |
171 | mutex_unlock(&data->update_lock); |
172 | } | |
173 | ||
00a88a19 | 174 | static int pca9532_set_brightness(struct led_classdev *led_cdev, |
e14fa824 RV |
175 | enum led_brightness value) |
176 | { | |
177 | int err = 0; | |
178 | struct pca9532_led *led = ldev_to_led(led_cdev); | |
179 | ||
180 | if (value == LED_OFF) | |
181 | led->state = PCA9532_OFF; | |
182 | else if (value == LED_FULL) | |
183 | led->state = PCA9532_ON; | |
184 | else { | |
185 | led->state = PCA9532_PWM0; /* Thecus: hardcode one pwm */ | |
07172d2b | 186 | err = pca9532_calcpwm(led->client, 0, 0, value); |
e14fa824 | 187 | if (err) |
00a88a19 | 188 | return err; |
e14fa824 | 189 | } |
00a88a19 AL |
190 | if (led->state == PCA9532_PWM0) |
191 | pca9532_setpwm(led->client, 0); | |
192 | pca9532_setled(led); | |
193 | return err; | |
e14fa824 RV |
194 | } |
195 | ||
196 | static int pca9532_set_blink(struct led_classdev *led_cdev, | |
197 | unsigned long *delay_on, unsigned long *delay_off) | |
198 | { | |
199 | struct pca9532_led *led = ldev_to_led(led_cdev); | |
200 | struct i2c_client *client = led->client; | |
201 | int psc; | |
07172d2b | 202 | int err = 0; |
e14fa824 RV |
203 | |
204 | if (*delay_on == 0 && *delay_off == 0) { | |
962363ce | 205 | /* led subsystem ask us for a blink rate */ |
85c5204a | 206 | *delay_on = 1000; |
e14fa824 RV |
207 | *delay_off = 1000; |
208 | } | |
209 | if (*delay_on != *delay_off || *delay_on > 1690 || *delay_on < 6) | |
210 | return -EINVAL; | |
211 | ||
212 | /* Thecus specific: only use PSC/PWM 0 */ | |
213 | psc = (*delay_on * 152-1)/1000; | |
07172d2b AO |
214 | err = pca9532_calcpwm(client, 0, psc, led_cdev->brightness); |
215 | if (err) | |
216 | return err; | |
00a88a19 AL |
217 | if (led->state == PCA9532_PWM0) |
218 | pca9532_setpwm(led->client, 0); | |
219 | pca9532_setled(led); | |
220 | ||
07172d2b | 221 | return 0; |
e14fa824 RV |
222 | } |
223 | ||
0d733579 SW |
224 | static int pca9532_event(struct input_dev *dev, unsigned int type, |
225 | unsigned int code, int value) | |
e14fa824 RV |
226 | { |
227 | struct pca9532_data *data = input_get_drvdata(dev); | |
228 | ||
7fbc3a9b | 229 | if (!(type == EV_SND && (code == SND_BELL || code == SND_TONE))) |
e14fa824 RV |
230 | return -1; |
231 | ||
232 | /* XXX: allow different kind of beeps with psc/pwm modifications */ | |
233 | if (value > 1 && value < 32767) | |
234 | data->pwm[1] = 127; | |
235 | else | |
236 | data->pwm[1] = 0; | |
237 | ||
07172d2b | 238 | schedule_work(&data->work); |
934cd3f9 | 239 | |
07172d2b | 240 | return 0; |
934cd3f9 RV |
241 | } |
242 | ||
243 | static void pca9532_input_work(struct work_struct *work) | |
244 | { | |
3dbf622c JW |
245 | struct pca9532_data *data = |
246 | container_of(work, struct pca9532_data, work); | |
247 | u8 maxleds = data->chip_info->num_leds; | |
248 | ||
e14fa824 | 249 | mutex_lock(&data->update_lock); |
3dbf622c | 250 | i2c_smbus_write_byte_data(data->client, PCA9532_REG_PWM(maxleds, 1), |
e14fa824 RV |
251 | data->pwm[1]); |
252 | mutex_unlock(&data->update_lock); | |
934cd3f9 | 253 | } |
e14fa824 | 254 | |
28c5fe99 FB |
255 | static enum pca9532_state pca9532_getled(struct pca9532_led *led) |
256 | { | |
257 | struct i2c_client *client = led->client; | |
258 | struct pca9532_data *data = i2c_get_clientdata(client); | |
259 | u8 maxleds = data->chip_info->num_leds; | |
260 | char reg; | |
261 | enum pca9532_state ret; | |
262 | ||
263 | mutex_lock(&data->update_lock); | |
264 | reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id)); | |
2a378856 | 265 | ret = (reg & LED_MASK(led->id)) >> LED_SHIFT(led->id); |
28c5fe99 FB |
266 | mutex_unlock(&data->update_lock); |
267 | return ret; | |
268 | } | |
269 | ||
3c1ab50d JE |
270 | #ifdef CONFIG_LEDS_PCA9532_GPIO |
271 | static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset) | |
272 | { | |
dced1467 | 273 | struct pca9532_data *data = gpiochip_get_data(gc); |
3c1ab50d JE |
274 | struct pca9532_led *led = &data->leds[offset]; |
275 | ||
276 | if (led->type == PCA9532_TYPE_GPIO) | |
277 | return 0; | |
278 | ||
279 | return -EBUSY; | |
280 | } | |
281 | ||
282 | static void pca9532_gpio_set_value(struct gpio_chip *gc, unsigned offset, int val) | |
283 | { | |
dced1467 | 284 | struct pca9532_data *data = gpiochip_get_data(gc); |
3c1ab50d JE |
285 | struct pca9532_led *led = &data->leds[offset]; |
286 | ||
287 | if (val) | |
288 | led->state = PCA9532_ON; | |
289 | else | |
290 | led->state = PCA9532_OFF; | |
291 | ||
292 | pca9532_setled(led); | |
293 | } | |
294 | ||
295 | static int pca9532_gpio_get_value(struct gpio_chip *gc, unsigned offset) | |
296 | { | |
dced1467 | 297 | struct pca9532_data *data = gpiochip_get_data(gc); |
3c1ab50d JE |
298 | unsigned char reg; |
299 | ||
300 | reg = i2c_smbus_read_byte_data(data->client, PCA9532_REG_INPUT(offset)); | |
301 | ||
302 | return !!(reg & (1 << (offset % 8))); | |
303 | } | |
304 | ||
305 | static int pca9532_gpio_direction_input(struct gpio_chip *gc, unsigned offset) | |
306 | { | |
307 | /* To use as input ensure pin is not driven */ | |
308 | pca9532_gpio_set_value(gc, offset, 0); | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | static int pca9532_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val) | |
314 | { | |
315 | pca9532_gpio_set_value(gc, offset, val); | |
316 | ||
317 | return 0; | |
318 | } | |
319 | #endif /* CONFIG_LEDS_PCA9532_GPIO */ | |
320 | ||
321 | static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs) | |
125c7135 AL |
322 | { |
323 | int i = n_devs; | |
324 | ||
325 | if (!data) | |
3c1ab50d | 326 | return -EINVAL; |
125c7135 AL |
327 | |
328 | while (--i >= 0) { | |
329 | switch (data->leds[i].type) { | |
330 | case PCA9532_TYPE_NONE: | |
3c1ab50d | 331 | case PCA9532_TYPE_GPIO: |
125c7135 AL |
332 | break; |
333 | case PCA9532_TYPE_LED: | |
334 | led_classdev_unregister(&data->leds[i].ldev); | |
125c7135 AL |
335 | break; |
336 | case PCA9532_TYPE_N2100_BEEP: | |
337 | if (data->idev != NULL) { | |
125c7135 AL |
338 | cancel_work_sync(&data->work); |
339 | data->idev = NULL; | |
340 | } | |
341 | break; | |
342 | } | |
343 | } | |
3c1ab50d JE |
344 | |
345 | #ifdef CONFIG_LEDS_PCA9532_GPIO | |
58383c78 | 346 | if (data->gpio.parent) |
88d5e520 | 347 | gpiochip_remove(&data->gpio); |
3c1ab50d JE |
348 | #endif |
349 | ||
350 | return 0; | |
125c7135 AL |
351 | } |
352 | ||
e14fa824 RV |
353 | static int pca9532_configure(struct i2c_client *client, |
354 | struct pca9532_data *data, struct pca9532_platform_data *pdata) | |
355 | { | |
356 | int i, err = 0; | |
3c1ab50d | 357 | int gpios = 0; |
3dbf622c | 358 | u8 maxleds = data->chip_info->num_leds; |
e14fa824 RV |
359 | |
360 | for (i = 0; i < 2; i++) { | |
361 | data->pwm[i] = pdata->pwm[i]; | |
362 | data->psc[i] = pdata->psc[i]; | |
3dbf622c | 363 | i2c_smbus_write_byte_data(client, PCA9532_REG_PWM(maxleds, i), |
e14fa824 | 364 | data->pwm[i]); |
3dbf622c | 365 | i2c_smbus_write_byte_data(client, PCA9532_REG_PSC(maxleds, i), |
e14fa824 RV |
366 | data->psc[i]); |
367 | } | |
368 | ||
3dbf622c | 369 | for (i = 0; i < data->chip_info->num_leds; i++) { |
e14fa824 RV |
370 | struct pca9532_led *led = &data->leds[i]; |
371 | struct pca9532_led *pled = &pdata->leds[i]; | |
372 | led->client = client; | |
373 | led->id = i; | |
374 | led->type = pled->type; | |
375 | switch (led->type) { | |
376 | case PCA9532_TYPE_NONE: | |
377 | break; | |
3c1ab50d JE |
378 | case PCA9532_TYPE_GPIO: |
379 | gpios++; | |
380 | break; | |
e14fa824 | 381 | case PCA9532_TYPE_LED: |
28c5fe99 FB |
382 | if (pled->state == PCA9532_KEEP) |
383 | led->state = pca9532_getled(led); | |
384 | else | |
385 | led->state = pled->state; | |
85c5204a | 386 | led->name = pled->name; |
e14fa824 | 387 | led->ldev.name = led->name; |
90a5537b | 388 | led->ldev.default_trigger = pled->default_trigger; |
e14fa824 | 389 | led->ldev.brightness = LED_OFF; |
00a88a19 AL |
390 | led->ldev.brightness_set_blocking = |
391 | pca9532_set_brightness; | |
e14fa824 | 392 | led->ldev.blink_set = pca9532_set_blink; |
f785d022 SW |
393 | err = led_classdev_register(&client->dev, &led->ldev); |
394 | if (err < 0) { | |
e14fa824 RV |
395 | dev_err(&client->dev, |
396 | "couldn't register LED %s\n", | |
397 | led->name); | |
398 | goto exit; | |
399 | } | |
400 | pca9532_setled(led); | |
401 | break; | |
402 | case PCA9532_TYPE_N2100_BEEP: | |
403 | BUG_ON(data->idev); | |
404 | led->state = PCA9532_PWM1; | |
405 | pca9532_setled(led); | |
8614fb46 | 406 | data->idev = devm_input_allocate_device(&client->dev); |
e14fa824 RV |
407 | if (data->idev == NULL) { |
408 | err = -ENOMEM; | |
409 | goto exit; | |
410 | } | |
411 | data->idev->name = pled->name; | |
412 | data->idev->phys = "i2c/pca9532"; | |
413 | data->idev->id.bustype = BUS_HOST; | |
85c5204a | 414 | data->idev->id.vendor = 0x001f; |
e14fa824 RV |
415 | data->idev->id.product = 0x0001; |
416 | data->idev->id.version = 0x0100; | |
417 | data->idev->evbit[0] = BIT_MASK(EV_SND); | |
418 | data->idev->sndbit[0] = BIT_MASK(SND_BELL) | | |
419 | BIT_MASK(SND_TONE); | |
420 | data->idev->event = pca9532_event; | |
421 | input_set_drvdata(data->idev, data); | |
07172d2b | 422 | INIT_WORK(&data->work, pca9532_input_work); |
e14fa824 RV |
423 | err = input_register_device(data->idev); |
424 | if (err) { | |
07172d2b | 425 | cancel_work_sync(&data->work); |
e14fa824 RV |
426 | data->idev = NULL; |
427 | goto exit; | |
428 | } | |
429 | break; | |
430 | } | |
431 | } | |
3c1ab50d JE |
432 | |
433 | #ifdef CONFIG_LEDS_PCA9532_GPIO | |
434 | if (gpios) { | |
435 | data->gpio.label = "gpio-pca9532"; | |
436 | data->gpio.direction_input = pca9532_gpio_direction_input; | |
437 | data->gpio.direction_output = pca9532_gpio_direction_output; | |
438 | data->gpio.set = pca9532_gpio_set_value; | |
439 | data->gpio.get = pca9532_gpio_get_value; | |
440 | data->gpio.request = pca9532_gpio_request_pin; | |
441 | data->gpio.can_sleep = 1; | |
442 | data->gpio.base = pdata->gpio_base; | |
3dbf622c | 443 | data->gpio.ngpio = data->chip_info->num_leds; |
58383c78 | 444 | data->gpio.parent = &client->dev; |
3c1ab50d JE |
445 | data->gpio.owner = THIS_MODULE; |
446 | ||
dced1467 | 447 | err = gpiochip_add_data(&data->gpio, data); |
3c1ab50d JE |
448 | if (err) { |
449 | /* Use data->gpio.dev as a flag for freeing gpiochip */ | |
58383c78 | 450 | data->gpio.parent = NULL; |
3c1ab50d JE |
451 | dev_warn(&client->dev, "could not add gpiochip\n"); |
452 | } else { | |
453 | dev_info(&client->dev, "gpios %i...%i\n", | |
454 | data->gpio.base, data->gpio.base + | |
455 | data->gpio.ngpio - 1); | |
456 | } | |
457 | } | |
458 | #endif | |
459 | ||
e14fa824 RV |
460 | return 0; |
461 | ||
462 | exit: | |
125c7135 | 463 | pca9532_destroy_devices(data, i); |
e14fa824 | 464 | return err; |
e14fa824 RV |
465 | } |
466 | ||
fa4191a6 PR |
467 | static struct pca9532_platform_data * |
468 | pca9532_of_populate_pdata(struct device *dev, struct device_node *np) | |
469 | { | |
470 | struct pca9532_platform_data *pdata; | |
471 | struct device_node *child; | |
fa4191a6 PR |
472 | int devid, maxleds; |
473 | int i = 0; | |
28c5fe99 | 474 | const char *state; |
fa4191a6 | 475 | |
66c41131 | 476 | devid = (int)(uintptr_t)of_device_get_match_data(dev); |
fa4191a6 PR |
477 | maxleds = pca9532_chip_info_tbl[devid].num_leds; |
478 | ||
479 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
480 | if (!pdata) | |
481 | return ERR_PTR(-ENOMEM); | |
482 | ||
23a70045 SR |
483 | pdata->gpio_base = -1; |
484 | ||
7ac5338c MM |
485 | of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0], |
486 | ARRAY_SIZE(pdata->pwm)); | |
487 | of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0], | |
488 | ARRAY_SIZE(pdata->psc)); | |
489 | ||
99a013c8 | 490 | for_each_available_child_of_node(np, child) { |
fa4191a6 PR |
491 | if (of_property_read_string(child, "label", |
492 | &pdata->leds[i].name)) | |
493 | pdata->leds[i].name = child->name; | |
494 | of_property_read_u32(child, "type", &pdata->leds[i].type); | |
495 | of_property_read_string(child, "linux,default-trigger", | |
496 | &pdata->leds[i].default_trigger); | |
28c5fe99 FB |
497 | if (!of_property_read_string(child, "default-state", &state)) { |
498 | if (!strcmp(state, "on")) | |
499 | pdata->leds[i].state = PCA9532_ON; | |
500 | else if (!strcmp(state, "keep")) | |
501 | pdata->leds[i].state = PCA9532_KEEP; | |
502 | } | |
fa4191a6 PR |
503 | if (++i >= maxleds) { |
504 | of_node_put(child); | |
505 | break; | |
506 | } | |
507 | } | |
508 | ||
509 | return pdata; | |
510 | } | |
511 | ||
e14fa824 RV |
512 | static int pca9532_probe(struct i2c_client *client, |
513 | const struct i2c_device_id *id) | |
514 | { | |
fa4191a6 | 515 | int devid; |
e14fa824 | 516 | struct pca9532_data *data = i2c_get_clientdata(client); |
87aae1ea JH |
517 | struct pca9532_platform_data *pca9532_pdata = |
518 | dev_get_platdata(&client->dev); | |
8853c95e | 519 | struct device_node *np = dev_of_node(&client->dev); |
fa4191a6 PR |
520 | |
521 | if (!pca9532_pdata) { | |
522 | if (np) { | |
523 | pca9532_pdata = | |
524 | pca9532_of_populate_pdata(&client->dev, np); | |
525 | if (IS_ERR(pca9532_pdata)) | |
526 | return PTR_ERR(pca9532_pdata); | |
527 | } else { | |
528 | dev_err(&client->dev, "no platform data\n"); | |
529 | return -EINVAL; | |
530 | } | |
66c41131 | 531 | devid = (int)(uintptr_t)of_device_get_match_data(&client->dev); |
fa4191a6 PR |
532 | } else { |
533 | devid = id->driver_data; | |
534 | } | |
e14fa824 RV |
535 | |
536 | if (!i2c_check_functionality(client->adapter, | |
537 | I2C_FUNC_SMBUS_BYTE_DATA)) | |
538 | return -EIO; | |
539 | ||
0f4630c9 | 540 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
e14fa824 RV |
541 | if (!data) |
542 | return -ENOMEM; | |
543 | ||
fa4191a6 | 544 | data->chip_info = &pca9532_chip_info_tbl[devid]; |
3dbf622c | 545 | |
e14fa824 RV |
546 | dev_info(&client->dev, "setting platform data\n"); |
547 | i2c_set_clientdata(client, data); | |
548 | data->client = client; | |
549 | mutex_init(&data->update_lock); | |
550 | ||
0f4630c9 | 551 | return pca9532_configure(client, data, pca9532_pdata); |
e14fa824 RV |
552 | } |
553 | ||
554 | static int pca9532_remove(struct i2c_client *client) | |
555 | { | |
556 | struct pca9532_data *data = i2c_get_clientdata(client); | |
3c1ab50d | 557 | |
c4241abc | 558 | return pca9532_destroy_devices(data, data->chip_info->num_leds); |
e14fa824 RV |
559 | } |
560 | ||
09a0d183 | 561 | module_i2c_driver(pca9532_driver); |
e14fa824 | 562 | |
b26e0ed4 | 563 | MODULE_AUTHOR("Riku Voipio"); |
e14fa824 RV |
564 | MODULE_LICENSE("GPL"); |
565 | MODULE_DESCRIPTION("PCA 9532 LED dimmer"); |