Commit | Line | Data |
---|---|---|
c93d08fa | 1 | /* |
ff45262a | 2 | * LP5521/LP5523/LP55231/LP5562 Common Driver |
c93d08fa MWK |
3 | * |
4 | * Copyright 2012 Texas Instruments | |
5 | * | |
6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Derived from leds-lp5521.c, leds-lp5523.c | |
13 | */ | |
14 | ||
53b41922 | 15 | #include <linux/clk.h> |
a85908dd | 16 | #include <linux/delay.h> |
10c06d17 | 17 | #include <linux/firmware.h> |
c93d08fa MWK |
18 | #include <linux/i2c.h> |
19 | #include <linux/leds.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/platform_data/leds-lp55xx.h> | |
7542a04b | 22 | #include <linux/slab.h> |
30dae2f9 SR |
23 | #include <linux/gpio.h> |
24 | #include <linux/of_gpio.h> | |
c93d08fa MWK |
25 | |
26 | #include "leds-lp55xx-common.h" | |
27 | ||
53b41922 KM |
28 | /* External clock rate */ |
29 | #define LP55XX_CLK_32K 32768 | |
30 | ||
a6e4679a MWK |
31 | static struct lp55xx_led *cdev_to_lp55xx_led(struct led_classdev *cdev) |
32 | { | |
33 | return container_of(cdev, struct lp55xx_led, cdev); | |
34 | } | |
35 | ||
a96bfa13 MWK |
36 | static struct lp55xx_led *dev_to_lp55xx_led(struct device *dev) |
37 | { | |
38 | return cdev_to_lp55xx_led(dev_get_drvdata(dev)); | |
39 | } | |
40 | ||
48068d5d MWK |
41 | static void lp55xx_reset_device(struct lp55xx_chip *chip) |
42 | { | |
43 | struct lp55xx_device_config *cfg = chip->cfg; | |
44 | u8 addr = cfg->reset.addr; | |
45 | u8 val = cfg->reset.val; | |
46 | ||
47 | /* no error checking here because no ACK from the device after reset */ | |
48 | lp55xx_write(chip, addr, val); | |
49 | } | |
50 | ||
e3a700d8 MWK |
51 | static int lp55xx_detect_device(struct lp55xx_chip *chip) |
52 | { | |
53 | struct lp55xx_device_config *cfg = chip->cfg; | |
54 | u8 addr = cfg->enable.addr; | |
55 | u8 val = cfg->enable.val; | |
56 | int ret; | |
57 | ||
58 | ret = lp55xx_write(chip, addr, val); | |
59 | if (ret) | |
60 | return ret; | |
61 | ||
62 | usleep_range(1000, 2000); | |
63 | ||
64 | ret = lp55xx_read(chip, addr, &val); | |
65 | if (ret) | |
66 | return ret; | |
67 | ||
68 | if (val != cfg->enable.val) | |
69 | return -ENODEV; | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
ffbdccdb MWK |
74 | static int lp55xx_post_init_device(struct lp55xx_chip *chip) |
75 | { | |
76 | struct lp55xx_device_config *cfg = chip->cfg; | |
77 | ||
78 | if (!cfg->post_init_device) | |
79 | return 0; | |
80 | ||
81 | return cfg->post_init_device(chip); | |
82 | } | |
83 | ||
a96bfa13 MWK |
84 | static ssize_t lp55xx_show_current(struct device *dev, |
85 | struct device_attribute *attr, | |
86 | char *buf) | |
87 | { | |
88 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
89 | ||
24d32128 | 90 | return scnprintf(buf, PAGE_SIZE, "%d\n", led->led_current); |
a96bfa13 MWK |
91 | } |
92 | ||
93 | static ssize_t lp55xx_store_current(struct device *dev, | |
94 | struct device_attribute *attr, | |
95 | const char *buf, size_t len) | |
96 | { | |
97 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
98 | struct lp55xx_chip *chip = led->chip; | |
99 | unsigned long curr; | |
100 | ||
101 | if (kstrtoul(buf, 0, &curr)) | |
102 | return -EINVAL; | |
103 | ||
104 | if (curr > led->max_current) | |
105 | return -EINVAL; | |
106 | ||
107 | if (!chip->cfg->set_led_current) | |
108 | return len; | |
109 | ||
110 | mutex_lock(&chip->lock); | |
111 | chip->cfg->set_led_current(led, (u8)curr); | |
112 | mutex_unlock(&chip->lock); | |
113 | ||
114 | return len; | |
115 | } | |
116 | ||
117 | static ssize_t lp55xx_show_max_current(struct device *dev, | |
118 | struct device_attribute *attr, | |
119 | char *buf) | |
120 | { | |
121 | struct lp55xx_led *led = dev_to_lp55xx_led(dev); | |
122 | ||
24d32128 | 123 | return scnprintf(buf, PAGE_SIZE, "%d\n", led->max_current); |
a96bfa13 MWK |
124 | } |
125 | ||
126 | static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current, | |
127 | lp55xx_store_current); | |
128 | static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL); | |
129 | ||
44a1255b | 130 | static struct attribute *lp55xx_led_attrs[] = { |
a96bfa13 MWK |
131 | &dev_attr_led_current.attr, |
132 | &dev_attr_max_current.attr, | |
0e202346 MWK |
133 | NULL, |
134 | }; | |
44a1255b | 135 | ATTRIBUTE_GROUPS(lp55xx_led); |
0e202346 MWK |
136 | |
137 | static void lp55xx_set_brightness(struct led_classdev *cdev, | |
138 | enum led_brightness brightness) | |
139 | { | |
a6e4679a MWK |
140 | struct lp55xx_led *led = cdev_to_lp55xx_led(cdev); |
141 | ||
142 | led->brightness = (u8)brightness; | |
143 | schedule_work(&led->brightness_work); | |
0e202346 MWK |
144 | } |
145 | ||
9e9b3db1 MWK |
146 | static int lp55xx_init_led(struct lp55xx_led *led, |
147 | struct lp55xx_chip *chip, int chan) | |
148 | { | |
0e202346 MWK |
149 | struct lp55xx_platform_data *pdata = chip->pdata; |
150 | struct lp55xx_device_config *cfg = chip->cfg; | |
151 | struct device *dev = &chip->cl->dev; | |
152 | char name[32]; | |
153 | int ret; | |
154 | int max_channel = cfg->max_channel; | |
155 | ||
156 | if (chan >= max_channel) { | |
157 | dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel); | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | if (pdata->led_config[chan].led_current == 0) | |
162 | return 0; | |
163 | ||
164 | led->led_current = pdata->led_config[chan].led_current; | |
165 | led->max_current = pdata->led_config[chan].max_current; | |
166 | led->chan_nr = pdata->led_config[chan].chan_nr; | |
f65f0a1a | 167 | led->cdev.default_trigger = pdata->led_config[chan].default_trigger; |
0e202346 MWK |
168 | |
169 | if (led->chan_nr >= max_channel) { | |
170 | dev_err(dev, "Use channel numbers between 0 and %d\n", | |
171 | max_channel - 1); | |
172 | return -EINVAL; | |
173 | } | |
174 | ||
175 | led->cdev.brightness_set = lp55xx_set_brightness; | |
44a1255b | 176 | led->cdev.groups = lp55xx_led_groups; |
0e202346 MWK |
177 | |
178 | if (pdata->led_config[chan].name) { | |
179 | led->cdev.name = pdata->led_config[chan].name; | |
180 | } else { | |
181 | snprintf(name, sizeof(name), "%s:channel%d", | |
182 | pdata->label ? : chip->cl->name, chan); | |
183 | led->cdev.name = name; | |
184 | } | |
185 | ||
0e202346 MWK |
186 | ret = led_classdev_register(dev, &led->cdev); |
187 | if (ret) { | |
188 | dev_err(dev, "led register err: %d\n", ret); | |
189 | return ret; | |
190 | } | |
191 | ||
9e9b3db1 MWK |
192 | return 0; |
193 | } | |
194 | ||
10c06d17 MWK |
195 | static void lp55xx_firmware_loaded(const struct firmware *fw, void *context) |
196 | { | |
197 | struct lp55xx_chip *chip = context; | |
198 | struct device *dev = &chip->cl->dev; | |
93ad8a1d | 199 | enum lp55xx_engine_index idx = chip->engine_idx; |
10c06d17 MWK |
200 | |
201 | if (!fw) { | |
202 | dev_err(dev, "firmware request failed\n"); | |
203 | goto out; | |
204 | } | |
205 | ||
206 | /* handling firmware data is chip dependent */ | |
207 | mutex_lock(&chip->lock); | |
208 | ||
93ad8a1d | 209 | chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD; |
10c06d17 MWK |
210 | chip->fw = fw; |
211 | if (chip->cfg->firmware_cb) | |
212 | chip->cfg->firmware_cb(chip); | |
213 | ||
214 | mutex_unlock(&chip->lock); | |
215 | ||
216 | out: | |
217 | /* firmware should be released for other channel use */ | |
218 | release_firmware(chip->fw); | |
219 | } | |
220 | ||
221 | static int lp55xx_request_firmware(struct lp55xx_chip *chip) | |
222 | { | |
223 | const char *name = chip->cl->name; | |
224 | struct device *dev = &chip->cl->dev; | |
225 | ||
226 | return request_firmware_nowait(THIS_MODULE, true, name, dev, | |
227 | GFP_KERNEL, chip, lp55xx_firmware_loaded); | |
228 | } | |
229 | ||
230 | static ssize_t lp55xx_show_engine_select(struct device *dev, | |
231 | struct device_attribute *attr, | |
232 | char *buf) | |
233 | { | |
234 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
235 | struct lp55xx_chip *chip = led->chip; | |
236 | ||
237 | return sprintf(buf, "%d\n", chip->engine_idx); | |
238 | } | |
239 | ||
240 | static ssize_t lp55xx_store_engine_select(struct device *dev, | |
241 | struct device_attribute *attr, | |
242 | const char *buf, size_t len) | |
243 | { | |
244 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
245 | struct lp55xx_chip *chip = led->chip; | |
246 | unsigned long val; | |
247 | int ret; | |
248 | ||
249 | if (kstrtoul(buf, 0, &val)) | |
250 | return -EINVAL; | |
251 | ||
252 | /* select the engine to be run */ | |
253 | ||
254 | switch (val) { | |
255 | case LP55XX_ENGINE_1: | |
256 | case LP55XX_ENGINE_2: | |
257 | case LP55XX_ENGINE_3: | |
258 | mutex_lock(&chip->lock); | |
259 | chip->engine_idx = val; | |
260 | ret = lp55xx_request_firmware(chip); | |
261 | mutex_unlock(&chip->lock); | |
262 | break; | |
263 | default: | |
264 | dev_err(dev, "%lu: invalid engine index. (1, 2, 3)\n", val); | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | if (ret) { | |
269 | dev_err(dev, "request firmware err: %d\n", ret); | |
270 | return ret; | |
271 | } | |
272 | ||
273 | return len; | |
274 | } | |
275 | ||
276 | static inline void lp55xx_run_engine(struct lp55xx_chip *chip, bool start) | |
277 | { | |
278 | if (chip->cfg->run_engine) | |
279 | chip->cfg->run_engine(chip, start); | |
280 | } | |
281 | ||
282 | static ssize_t lp55xx_store_engine_run(struct device *dev, | |
283 | struct device_attribute *attr, | |
284 | const char *buf, size_t len) | |
285 | { | |
286 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
287 | struct lp55xx_chip *chip = led->chip; | |
288 | unsigned long val; | |
289 | ||
290 | if (kstrtoul(buf, 0, &val)) | |
291 | return -EINVAL; | |
292 | ||
293 | /* run or stop the selected engine */ | |
294 | ||
295 | if (val <= 0) { | |
296 | lp55xx_run_engine(chip, false); | |
297 | return len; | |
298 | } | |
299 | ||
300 | mutex_lock(&chip->lock); | |
301 | lp55xx_run_engine(chip, true); | |
302 | mutex_unlock(&chip->lock); | |
303 | ||
304 | return len; | |
305 | } | |
306 | ||
307 | static DEVICE_ATTR(select_engine, S_IRUGO | S_IWUSR, | |
308 | lp55xx_show_engine_select, lp55xx_store_engine_select); | |
309 | static DEVICE_ATTR(run_engine, S_IWUSR, NULL, lp55xx_store_engine_run); | |
310 | ||
b3b6f811 | 311 | static struct attribute *lp55xx_engine_attributes[] = { |
10c06d17 MWK |
312 | &dev_attr_select_engine.attr, |
313 | &dev_attr_run_engine.attr, | |
b3b6f811 MWK |
314 | NULL, |
315 | }; | |
316 | ||
317 | static const struct attribute_group lp55xx_engine_attr_group = { | |
318 | .attrs = lp55xx_engine_attributes, | |
319 | }; | |
320 | ||
c93d08fa MWK |
321 | int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) |
322 | { | |
323 | return i2c_smbus_write_byte_data(chip->cl, reg, val); | |
324 | } | |
325 | EXPORT_SYMBOL_GPL(lp55xx_write); | |
326 | ||
327 | int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) | |
328 | { | |
329 | s32 ret; | |
330 | ||
331 | ret = i2c_smbus_read_byte_data(chip->cl, reg); | |
332 | if (ret < 0) | |
333 | return ret; | |
334 | ||
335 | *val = ret; | |
336 | return 0; | |
337 | } | |
338 | EXPORT_SYMBOL_GPL(lp55xx_read); | |
339 | ||
340 | int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) | |
341 | { | |
342 | int ret; | |
343 | u8 tmp; | |
344 | ||
345 | ret = lp55xx_read(chip, reg, &tmp); | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | tmp &= ~mask; | |
350 | tmp |= val & mask; | |
351 | ||
352 | return lp55xx_write(chip, reg, tmp); | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(lp55xx_update_bits); | |
355 | ||
53b41922 KM |
356 | bool lp55xx_is_extclk_used(struct lp55xx_chip *chip) |
357 | { | |
358 | struct clk *clk; | |
359 | int err; | |
360 | ||
361 | clk = devm_clk_get(&chip->cl->dev, "32k_clk"); | |
362 | if (IS_ERR(clk)) | |
363 | goto use_internal_clk; | |
364 | ||
365 | err = clk_prepare_enable(clk); | |
366 | if (err) | |
367 | goto use_internal_clk; | |
368 | ||
369 | if (clk_get_rate(clk) != LP55XX_CLK_32K) { | |
370 | clk_disable_unprepare(clk); | |
371 | goto use_internal_clk; | |
372 | } | |
373 | ||
374 | dev_info(&chip->cl->dev, "%dHz external clock used\n", LP55XX_CLK_32K); | |
375 | ||
376 | chip->clk = clk; | |
377 | return true; | |
378 | ||
379 | use_internal_clk: | |
380 | dev_info(&chip->cl->dev, "internal clock used\n"); | |
381 | return false; | |
382 | } | |
383 | EXPORT_SYMBOL_GPL(lp55xx_is_extclk_used); | |
384 | ||
a85908dd MWK |
385 | int lp55xx_init_device(struct lp55xx_chip *chip) |
386 | { | |
387 | struct lp55xx_platform_data *pdata; | |
48068d5d | 388 | struct lp55xx_device_config *cfg; |
a85908dd MWK |
389 | struct device *dev = &chip->cl->dev; |
390 | int ret = 0; | |
391 | ||
392 | WARN_ON(!chip); | |
393 | ||
394 | pdata = chip->pdata; | |
48068d5d | 395 | cfg = chip->cfg; |
a85908dd | 396 | |
48068d5d | 397 | if (!pdata || !cfg) |
a85908dd MWK |
398 | return -EINVAL; |
399 | ||
30dae2f9 SR |
400 | if (gpio_is_valid(pdata->enable_gpio)) { |
401 | ret = devm_gpio_request_one(dev, pdata->enable_gpio, | |
402 | GPIOF_DIR_OUT, "lp5523_enable"); | |
a85908dd | 403 | if (ret < 0) { |
30dae2f9 SR |
404 | dev_err(dev, "could not acquire enable gpio (err=%d)\n", |
405 | ret); | |
a85908dd MWK |
406 | goto err; |
407 | } | |
a85908dd | 408 | |
30dae2f9 | 409 | gpio_set_value(pdata->enable_gpio, 0); |
a85908dd | 410 | usleep_range(1000, 2000); /* Keep enable down at least 1ms */ |
30dae2f9 | 411 | gpio_set_value(pdata->enable_gpio, 1); |
a85908dd MWK |
412 | usleep_range(1000, 2000); /* 500us abs min. */ |
413 | } | |
414 | ||
48068d5d MWK |
415 | lp55xx_reset_device(chip); |
416 | ||
417 | /* | |
418 | * Exact value is not available. 10 - 20ms | |
419 | * appears to be enough for reset. | |
420 | */ | |
421 | usleep_range(10000, 20000); | |
422 | ||
e3a700d8 MWK |
423 | ret = lp55xx_detect_device(chip); |
424 | if (ret) { | |
425 | dev_err(dev, "device detection err: %d\n", ret); | |
426 | goto err; | |
427 | } | |
428 | ||
ffbdccdb MWK |
429 | /* chip specific initialization */ |
430 | ret = lp55xx_post_init_device(chip); | |
22ebeb48 MWK |
431 | if (ret) { |
432 | dev_err(dev, "post init device err: %d\n", ret); | |
433 | goto err_post_init; | |
434 | } | |
ffbdccdb MWK |
435 | |
436 | return 0; | |
437 | ||
22ebeb48 | 438 | err_post_init: |
6ce61762 MWK |
439 | lp55xx_deinit_device(chip); |
440 | err: | |
441 | return ret; | |
442 | } | |
443 | EXPORT_SYMBOL_GPL(lp55xx_init_device); | |
444 | ||
445 | void lp55xx_deinit_device(struct lp55xx_chip *chip) | |
446 | { | |
447 | struct lp55xx_platform_data *pdata = chip->pdata; | |
448 | ||
53b41922 KM |
449 | if (chip->clk) |
450 | clk_disable_unprepare(chip->clk); | |
451 | ||
30dae2f9 SR |
452 | if (gpio_is_valid(pdata->enable_gpio)) |
453 | gpio_set_value(pdata->enable_gpio, 0); | |
a85908dd | 454 | } |
6ce61762 | 455 | EXPORT_SYMBOL_GPL(lp55xx_deinit_device); |
a85908dd | 456 | |
9e9b3db1 MWK |
457 | int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) |
458 | { | |
459 | struct lp55xx_platform_data *pdata = chip->pdata; | |
460 | struct lp55xx_device_config *cfg = chip->cfg; | |
461 | int num_channels = pdata->num_channels; | |
462 | struct lp55xx_led *each; | |
463 | u8 led_current; | |
464 | int ret; | |
465 | int i; | |
466 | ||
467 | if (!cfg->brightness_work_fn) { | |
468 | dev_err(&chip->cl->dev, "empty brightness configuration\n"); | |
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | for (i = 0; i < num_channels; i++) { | |
473 | ||
474 | /* do not initialize channels that are not connected */ | |
475 | if (pdata->led_config[i].led_current == 0) | |
476 | continue; | |
477 | ||
478 | led_current = pdata->led_config[i].led_current; | |
479 | each = led + i; | |
480 | ret = lp55xx_init_led(each, chip, i); | |
481 | if (ret) | |
482 | goto err_init_led; | |
483 | ||
484 | INIT_WORK(&each->brightness_work, cfg->brightness_work_fn); | |
485 | ||
486 | chip->num_leds++; | |
487 | each->chip = chip; | |
488 | ||
489 | /* setting led current at each channel */ | |
490 | if (cfg->set_led_current) | |
491 | cfg->set_led_current(each, led_current); | |
492 | } | |
493 | ||
494 | return 0; | |
495 | ||
496 | err_init_led: | |
d9067d28 | 497 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 MWK |
498 | return ret; |
499 | } | |
500 | EXPORT_SYMBOL_GPL(lp55xx_register_leds); | |
501 | ||
c3a68ebf MWK |
502 | void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) |
503 | { | |
504 | int i; | |
505 | struct lp55xx_led *each; | |
c3a68ebf MWK |
506 | |
507 | for (i = 0; i < chip->num_leds; i++) { | |
508 | each = led + i; | |
c3a68ebf MWK |
509 | led_classdev_unregister(&each->cdev); |
510 | flush_work(&each->brightness_work); | |
511 | } | |
512 | } | |
513 | EXPORT_SYMBOL_GPL(lp55xx_unregister_leds); | |
514 | ||
b3b6f811 MWK |
515 | int lp55xx_register_sysfs(struct lp55xx_chip *chip) |
516 | { | |
517 | struct device *dev = &chip->cl->dev; | |
240085e2 MWK |
518 | struct lp55xx_device_config *cfg = chip->cfg; |
519 | int ret; | |
520 | ||
521 | if (!cfg->run_engine || !cfg->firmware_cb) | |
522 | goto dev_specific_attrs; | |
523 | ||
524 | ret = sysfs_create_group(&dev->kobj, &lp55xx_engine_attr_group); | |
525 | if (ret) | |
526 | return ret; | |
b3b6f811 | 527 | |
240085e2 MWK |
528 | dev_specific_attrs: |
529 | return cfg->dev_attr_group ? | |
530 | sysfs_create_group(&dev->kobj, cfg->dev_attr_group) : 0; | |
b3b6f811 MWK |
531 | } |
532 | EXPORT_SYMBOL_GPL(lp55xx_register_sysfs); | |
533 | ||
ba6fa846 MWK |
534 | void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) |
535 | { | |
536 | struct device *dev = &chip->cl->dev; | |
537 | struct lp55xx_device_config *cfg = chip->cfg; | |
538 | ||
539 | if (cfg->dev_attr_group) | |
540 | sysfs_remove_group(&dev->kobj, cfg->dev_attr_group); | |
541 | ||
542 | sysfs_remove_group(&dev->kobj, &lp55xx_engine_attr_group); | |
543 | } | |
544 | EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); | |
545 | ||
7542a04b LW |
546 | int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np) |
547 | { | |
2dac9128 | 548 | struct device_node *child; |
7542a04b | 549 | struct lp55xx_platform_data *pdata; |
2dac9128 KM |
550 | struct lp55xx_led_config *cfg; |
551 | int num_channels; | |
552 | int i = 0; | |
7542a04b LW |
553 | |
554 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
555 | if (!pdata) | |
556 | return -ENOMEM; | |
557 | ||
2dac9128 KM |
558 | num_channels = of_get_child_count(np); |
559 | if (num_channels == 0) { | |
560 | dev_err(dev, "no LED channels\n"); | |
561 | return -EINVAL; | |
562 | } | |
7542a04b | 563 | |
2dac9128 KM |
564 | cfg = devm_kzalloc(dev, sizeof(*cfg) * num_channels, GFP_KERNEL); |
565 | if (!cfg) | |
7542a04b LW |
566 | return -ENOMEM; |
567 | ||
2dac9128 KM |
568 | pdata->led_config = &cfg[0]; |
569 | pdata->num_channels = num_channels; | |
570 | ||
571 | for_each_child_of_node(np, child) { | |
572 | cfg[i].chan_nr = i; | |
573 | ||
574 | of_property_read_string(child, "chan-name", &cfg[i].name); | |
575 | of_property_read_u8(child, "led-cur", &cfg[i].led_current); | |
576 | of_property_read_u8(child, "max-cur", &cfg[i].max_current); | |
f65f0a1a LW |
577 | cfg[i].default_trigger = |
578 | of_get_property(child, "linux,default-trigger", NULL); | |
2dac9128 KM |
579 | |
580 | i++; | |
7542a04b | 581 | } |
2dac9128 KM |
582 | |
583 | of_property_read_string(np, "label", &pdata->label); | |
584 | of_property_read_u8(np, "clock-mode", &pdata->clock_mode); | |
585 | ||
30dae2f9 SR |
586 | pdata->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0); |
587 | ||
33b3a561 KM |
588 | /* LP8501 specific */ |
589 | of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel); | |
590 | ||
7542a04b LW |
591 | dev->platform_data = pdata; |
592 | ||
593 | return 0; | |
594 | } | |
595 | EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata); | |
596 | ||
c93d08fa MWK |
597 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
598 | MODULE_DESCRIPTION("LP55xx Common Driver"); | |
599 | MODULE_LICENSE("GPL"); |