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drivers/leds: Replace __get_cpu_var use through this_cpu_ptr
[linux.git] / drivers / leds / leds-bd2802.c
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0b56129b
KK		 1/*
2 * leds-bd2802.c - RGB LED Driver
3 *
4 * Copyright (C) 2009 Samsung Electronics
5 * Kim Kyuwon <[email protected]>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
12 *
13 */
14
15#include <linux/module.h>
16#include <linux/i2c.h>
17#include <linux/gpio.h>
18#include <linux/delay.h>
19#include <linux/leds.h>
20#include <linux/leds-bd2802.h>
5a0e3ad6 21#include <linux/slab.h>
551ea738 22#include <linux/pm.h>
0b56129b
KK		 23
24#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))
25
26#define BD2802_LED_OFFSET 0xa
27#define BD2802_COLOR_OFFSET 0x3
28
6b8aa972
SK		 29#define BD2802_REG_CLKSETUP 0x00
30#define BD2802_REG_CONTROL 0x01
0b56129b
KK		 31#define BD2802_REG_HOURSETUP 0x02
32#define BD2802_REG_CURRENT1SETUP 0x03
33#define BD2802_REG_CURRENT2SETUP 0x04
34#define BD2802_REG_WAVEPATTERN 0x05
35
36#define BD2802_CURRENT_032 0x10 /* 3.2mA */
37#define BD2802_CURRENT_000 0x00 /* 0.0mA */
38
39#define BD2802_PATTERN_FULL 0x07
40#define BD2802_PATTERN_HALF 0x03
41
42enum led_ids {
43 LED1,
44 LED2,
45 LED_NUM,
46};
47
48enum led_colors {
49 RED,
50 GREEN,
51 BLUE,
52};
53
54enum led_bits {
55 BD2802_OFF,
56 BD2802_BLINK,
57 BD2802_ON,
58};
59
60/*
61 * State '0' : 'off'
62 * State '1' : 'blink'
63 * State '2' : 'on'.
64 */
65struct led_state {
66 unsigned r:2;
67 unsigned g:2;
68 unsigned b:2;
69};
70
71struct bd2802_led {
72 struct bd2802_led_platform_data *pdata;
73 struct i2c_client *client;
74 struct rw_semaphore rwsem;
75 struct work_struct work;
76
77 struct led_state led[2];
78
79 /*
80 * Making led_classdev as array is not recommended, because array
81 * members prevent using 'container_of' macro. So repetitive works
82 * are needed.
83 */
84 struct led_classdev cdev_led1r;
85 struct led_classdev cdev_led1g;
86 struct led_classdev cdev_led1b;
87 struct led_classdev cdev_led2r;
88 struct led_classdev cdev_led2g;
89 struct led_classdev cdev_led2b;
90
91 /*
92 * Advanced Configuration Function(ADF) mode:
93 * In ADF mode, user can set registers of BD2802GU directly,
94 * therefore BD2802GU doesn't enter reset state.
95 */
6b8aa972 96 int adf_on;
0b56129b
KK		 97
98 enum led_ids led_id;
99 enum led_colors color;
100 enum led_bits state;
8792f7cf
KK		 101
102 /* General attributes of RGB LEDs */
103 int wave_pattern;
104 int rgb_current;
0b56129b
KK		 105};
106
107
108/*--------------------------------------------------------------*/
109/* BD2802GU helper functions */
110/*--------------------------------------------------------------*/
111
112static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id,
113 enum led_colors color)
114{
115 switch (color) {
116 case RED:
117 return !led->led[id].r;
118 case GREEN:
119 return !led->led[id].g;
120 case BLUE:
121 return !led->led[id].b;
122 default:
123 dev_err(&led->client->dev, "%s: Invalid color\n", __func__);
124 return -EINVAL;
125 }
126}
127
128static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id)
129{
130 if (led->led[id].r || led->led[id].g || led->led[id].b)
131 return 0;
132
133 return 1;
134}
135
136static inline int bd2802_is_all_off(struct bd2802_led *led)
137{
138 int i;
139
140 for (i = 0; i < LED_NUM; i++)
141 if (!bd2802_is_led_off(led, i))
142 return 0;
143
144 return 1;
145}
146
147static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
148{
149 return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
150}
151
152static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color,
153 u8 reg_offset)
154{
155 return reg_offset + bd2802_get_base_offset(id, color);
156}
157
158
159/*--------------------------------------------------------------*/
160/* BD2802GU core functions */
161/*--------------------------------------------------------------*/
162
163static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val)
164{
165 int ret = i2c_smbus_write_byte_data(client, reg, val);
166 if (ret >= 0)
167 return 0;
168
169 dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
170 __func__, reg, val, ret);
171
172 return ret;
173}
174
175static void bd2802_update_state(struct bd2802_led *led, enum led_ids id,
176 enum led_colors color, enum led_bits led_bit)
177{
178 int i;
179 u8 value;
180
181 for (i = 0; i < LED_NUM; i++) {
182 if (i == id) {
183 switch (color) {
184 case RED:
185 led->led[i].r = led_bit;
186 break;
187 case GREEN:
188 led->led[i].g = led_bit;
189 break;
190 case BLUE:
191 led->led[i].b = led_bit;
192 break;
193 default:
194 dev_err(&led->client->dev,
195 "%s: Invalid color\n", __func__);
196 return;
197 }
198 }
199 }
200
201 if (led_bit == BD2802_BLINK || led_bit == BD2802_ON)
202 return;
203
204 if (!bd2802_is_led_off(led, id))
205 return;
206
207 if (bd2802_is_all_off(led) && !led->adf_on) {
208 gpio_set_value(led->pdata->reset_gpio, 0);
209 return;
210 }
211
212 /*
213 * In this case, other led is turned on, and current led is turned
214 * off. So set RGB LED Control register to stop the current RGB LED
215 */
216 value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1);
217 bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
218}
219
220static void bd2802_configure(struct bd2802_led *led)
221{
222 struct bd2802_led_platform_data *pdata = led->pdata;
223 u8 reg;
224
225 reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP);
226 bd2802_write_byte(led->client, reg, pdata->rgb_time);
227
228 reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP);
229 bd2802_write_byte(led->client, reg, pdata->rgb_time);
230}
231
232static void bd2802_reset_cancel(struct bd2802_led *led)
233{
234 gpio_set_value(led->pdata->reset_gpio, 1);
235 udelay(100);
236 bd2802_configure(led);
237}
238
239static void bd2802_enable(struct bd2802_led *led, enum led_ids id)
240{
241 enum led_ids other_led = (id == LED1) ? LED2 : LED1;
242 u8 value, other_led_on;
243
244 other_led_on = !bd2802_is_led_off(led, other_led);
245 if (id == LED1)
246 value = LED_CTL(other_led_on, 1);
247 else
248 value = LED_CTL(1 , other_led_on);
249
250 bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
251}
252
253static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
254 enum led_colors color)
255{
256 u8 reg;
257
258 if (bd2802_is_all_off(led) && !led->adf_on)
259 bd2802_reset_cancel(led);
260
261 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
8792f7cf 262 bd2802_write_byte(led->client, reg, led->rgb_current);
0b56129b
KK		 263 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
264 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
265 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
266 bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL);
267
268 bd2802_enable(led, id);
269 bd2802_update_state(led, id, color, BD2802_ON);
270}
271
272static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
273 enum led_colors color)
274{
275 u8 reg;
276
277 if (bd2802_is_all_off(led) && !led->adf_on)
278 bd2802_reset_cancel(led);
279
280 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
281 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
282 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
8792f7cf 283 bd2802_write_byte(led->client, reg, led->rgb_current);
0b56129b 284 reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
8792f7cf 285 bd2802_write_byte(led->client, reg, led->wave_pattern);
0b56129b
KK		 286
287 bd2802_enable(led, id);
288 bd2802_update_state(led, id, color, BD2802_BLINK);
289}
290
291static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id,
292 enum led_colors color, enum led_bits led_bit)
293{
294 if (led_bit == BD2802_OFF) {
295 dev_err(&led->client->dev,
296 "Only 'blink' and 'on' are allowed\n");
297 return;
298 }
299
300 if (led_bit == BD2802_BLINK)
301 bd2802_set_blink(led, id, color);
302 else
303 bd2802_set_on(led, id, color);
304}
305
306static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id,
307 enum led_colors color)
308{
309 u8 reg;
310
311 if (bd2802_is_rgb_off(led, id, color))
312 return;
313
314 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
315 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
316 reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
317 bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
318
319 bd2802_update_state(led, id, color, BD2802_OFF);
320}
321
0b56129b
KK		 322#define BD2802_SET_REGISTER(reg_addr, reg_name) \
323static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \
324 struct device_attribute *attr, const char *buf, size_t count) \
325{ \
326 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
327 unsigned long val; \
328 int ret; \
329 if (!count) \
330 return -EINVAL; \
fd80fc76 331 ret = kstrtoul(buf, 16, &val); \
0b56129b
KK		 332 if (ret) \
333 return ret; \
334 down_write(&led->rwsem); \
335 bd2802_write_byte(led->client, reg_addr, (u8) val); \
336 up_write(&led->rwsem); \
337 return count; \
338} \
339static struct device_attribute bd2802_reg##reg_addr##_attr = { \
0c8617d3 340 .attr = {.name = reg_name, .mode = 0644}, \
0b56129b
KK		 341 .store = bd2802_store_reg##reg_addr, \
342};
343
344BD2802_SET_REGISTER(0x00, "0x00");
345BD2802_SET_REGISTER(0x01, "0x01");
346BD2802_SET_REGISTER(0x02, "0x02");
347BD2802_SET_REGISTER(0x03, "0x03");
348BD2802_SET_REGISTER(0x04, "0x04");
349BD2802_SET_REGISTER(0x05, "0x05");
350BD2802_SET_REGISTER(0x06, "0x06");
351BD2802_SET_REGISTER(0x07, "0x07");
352BD2802_SET_REGISTER(0x08, "0x08");
353BD2802_SET_REGISTER(0x09, "0x09");
354BD2802_SET_REGISTER(0x0a, "0x0a");
355BD2802_SET_REGISTER(0x0b, "0x0b");
356BD2802_SET_REGISTER(0x0c, "0x0c");
357BD2802_SET_REGISTER(0x0d, "0x0d");
358BD2802_SET_REGISTER(0x0e, "0x0e");
359BD2802_SET_REGISTER(0x0f, "0x0f");
360BD2802_SET_REGISTER(0x10, "0x10");
361BD2802_SET_REGISTER(0x11, "0x11");
362BD2802_SET_REGISTER(0x12, "0x12");
363BD2802_SET_REGISTER(0x13, "0x13");
364BD2802_SET_REGISTER(0x14, "0x14");
365BD2802_SET_REGISTER(0x15, "0x15");
366
367static struct device_attribute *bd2802_addr_attributes[] = {
368 &bd2802_reg0x00_attr,
369 &bd2802_reg0x01_attr,
370 &bd2802_reg0x02_attr,
371 &bd2802_reg0x03_attr,
372 &bd2802_reg0x04_attr,
373 &bd2802_reg0x05_attr,
374 &bd2802_reg0x06_attr,
375 &bd2802_reg0x07_attr,
376 &bd2802_reg0x08_attr,
377 &bd2802_reg0x09_attr,
378 &bd2802_reg0x0a_attr,
379 &bd2802_reg0x0b_attr,
380 &bd2802_reg0x0c_attr,
381 &bd2802_reg0x0d_attr,
382 &bd2802_reg0x0e_attr,
383 &bd2802_reg0x0f_attr,
384 &bd2802_reg0x10_attr,
385 &bd2802_reg0x11_attr,
386 &bd2802_reg0x12_attr,
387 &bd2802_reg0x13_attr,
388 &bd2802_reg0x14_attr,
389 &bd2802_reg0x15_attr,
390};
391
392static void bd2802_enable_adv_conf(struct bd2802_led *led)
393{
394 int i, ret;
395
396 for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) {
397 ret = device_create_file(&led->client->dev,
398 bd2802_addr_attributes[i]);
399 if (ret) {
8792f7cf 400 dev_err(&led->client->dev, "failed: sysfs file %s\n",
0b56129b
KK		 401 bd2802_addr_attributes[i]->attr.name);
402 goto failed_remove_files;
403 }
404 }
405
406 if (bd2802_is_all_off(led))
407 bd2802_reset_cancel(led);
408
409 led->adf_on = 1;
410
411 return;
412
413failed_remove_files:
414 for (i--; i >= 0; i--)
415 device_remove_file(&led->client->dev,
416 bd2802_addr_attributes[i]);
417}
418
419static void bd2802_disable_adv_conf(struct bd2802_led *led)
420{
421 int i;
422
423 for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++)
424 device_remove_file(&led->client->dev,
425 bd2802_addr_attributes[i]);
426
427 if (bd2802_is_all_off(led))
428 gpio_set_value(led->pdata->reset_gpio, 0);
429
430 led->adf_on = 0;
431}
432
433static ssize_t bd2802_show_adv_conf(struct device *dev,
434 struct device_attribute *attr, char *buf)
435{
436 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
437 ssize_t ret;
438
439 down_read(&led->rwsem);
440 if (led->adf_on)
441 ret = sprintf(buf, "on\n");
442 else
443 ret = sprintf(buf, "off\n");
444 up_read(&led->rwsem);
445
446 return ret;
447}
448
449static ssize_t bd2802_store_adv_conf(struct device *dev,
450 struct device_attribute *attr, const char *buf, size_t count)
451{
452 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
453
454 if (!count)
455 return -EINVAL;
456
457 down_write(&led->rwsem);
458 if (!led->adf_on && !strncmp(buf, "on", 2))
459 bd2802_enable_adv_conf(led);
460 else if (led->adf_on && !strncmp(buf, "off", 3))
461 bd2802_disable_adv_conf(led);
462 up_write(&led->rwsem);
463
464 return count;
465}
466
467static struct device_attribute bd2802_adv_conf_attr = {
468 .attr = {
469 .name = "advanced_configuration",
470 .mode = 0644,
0b56129b
KK		 471 },
472 .show = bd2802_show_adv_conf,
473 .store = bd2802_store_adv_conf,
474};
475
8792f7cf
KK		 476#define BD2802_CONTROL_ATTR(attr_name, name_str) \
477static ssize_t bd2802_show_##attr_name(struct device *dev, \
478 struct device_attribute *attr, char *buf) \
479{ \
480 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
481 ssize_t ret; \
482 down_read(&led->rwsem); \
483 ret = sprintf(buf, "0x%02x\n", led->attr_name); \
484 up_read(&led->rwsem); \
485 return ret; \
486} \
487static ssize_t bd2802_store_##attr_name(struct device *dev, \
488 struct device_attribute *attr, const char *buf, size_t count) \
489{ \
490 struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
491 unsigned long val; \
492 int ret; \
493 if (!count) \
494 return -EINVAL; \
fd80fc76 495 ret = kstrtoul(buf, 16, &val); \
8792f7cf
KK		 496 if (ret) \
497 return ret; \
498 down_write(&led->rwsem); \
499 led->attr_name = val; \
500 up_write(&led->rwsem); \
501 return count; \
502} \
503static struct device_attribute bd2802_##attr_name##_attr = { \
504 .attr = { \
505 .name = name_str, \
506 .mode = 0644, \
8792f7cf
KK		 507 }, \
508 .show = bd2802_show_##attr_name, \
509 .store = bd2802_store_##attr_name, \
510};
511
512BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
513BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
514
515static struct device_attribute *bd2802_attributes[] = {
516 &bd2802_adv_conf_attr,
517 &bd2802_wave_pattern_attr,
518 &bd2802_rgb_current_attr,
519};
520
0b56129b
KK		 521static void bd2802_led_work(struct work_struct *work)
522{
523 struct bd2802_led *led = container_of(work, struct bd2802_led, work);
524
525 if (led->state)
526 bd2802_turn_on(led, led->led_id, led->color, led->state);
527 else
528 bd2802_turn_off(led, led->led_id, led->color);
529}
530
531#define BD2802_CONTROL_RGBS(name, id, clr) \
532static void bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\
533 enum led_brightness value) \
534{ \
535 struct bd2802_led *led = \
536 container_of(led_cdev, struct bd2802_led, cdev_##name); \
537 led->led_id = id; \
538 led->color = clr; \
539 if (value == LED_OFF) \
540 led->state = BD2802_OFF; \
541 else \
542 led->state = BD2802_ON; \
543 schedule_work(&led->work); \
544} \
545static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \
546 unsigned long *delay_on, unsigned long *delay_off) \
547{ \
548 struct bd2802_led *led = \
549 container_of(led_cdev, struct bd2802_led, cdev_##name); \
550 if (*delay_on == 0 || *delay_off == 0) \
551 return -EINVAL; \
552 led->led_id = id; \
553 led->color = clr; \
554 led->state = BD2802_BLINK; \
555 schedule_work(&led->work); \
556 return 0; \
557}
558
559BD2802_CONTROL_RGBS(led1r, LED1, RED);
560BD2802_CONTROL_RGBS(led1g, LED1, GREEN);
561BD2802_CONTROL_RGBS(led1b, LED1, BLUE);
562BD2802_CONTROL_RGBS(led2r, LED2, RED);
563BD2802_CONTROL_RGBS(led2g, LED2, GREEN);
564BD2802_CONTROL_RGBS(led2b, LED2, BLUE);
565
566static int bd2802_register_led_classdev(struct bd2802_led *led)
567{
568 int ret;
569
570 INIT_WORK(&led->work, bd2802_led_work);
571
572 led->cdev_led1r.name = "led1_R";
573 led->cdev_led1r.brightness = LED_OFF;
574 led->cdev_led1r.brightness_set = bd2802_set_led1r_brightness;
575 led->cdev_led1r.blink_set = bd2802_set_led1r_blink;
0b56129b
KK		 576
577 ret = led_classdev_register(&led->client->dev, &led->cdev_led1r);
578 if (ret < 0) {
579 dev_err(&led->client->dev, "couldn't register LED %s\n",
580 led->cdev_led1r.name);
581 goto failed_unregister_led1_R;
582 }
583
584 led->cdev_led1g.name = "led1_G";
585 led->cdev_led1g.brightness = LED_OFF;
586 led->cdev_led1g.brightness_set = bd2802_set_led1g_brightness;
587 led->cdev_led1g.blink_set = bd2802_set_led1g_blink;
0b56129b
KK		 588
589 ret = led_classdev_register(&led->client->dev, &led->cdev_led1g);
590 if (ret < 0) {
591 dev_err(&led->client->dev, "couldn't register LED %s\n",
592 led->cdev_led1g.name);
593 goto failed_unregister_led1_G;
594 }
595
596 led->cdev_led1b.name = "led1_B";
597 led->cdev_led1b.brightness = LED_OFF;
598 led->cdev_led1b.brightness_set = bd2802_set_led1b_brightness;
599 led->cdev_led1b.blink_set = bd2802_set_led1b_blink;
0b56129b
KK		 600
601 ret = led_classdev_register(&led->client->dev, &led->cdev_led1b);
602 if (ret < 0) {
603 dev_err(&led->client->dev, "couldn't register LED %s\n",
604 led->cdev_led1b.name);
605 goto failed_unregister_led1_B;
606 }
607
608 led->cdev_led2r.name = "led2_R";
609 led->cdev_led2r.brightness = LED_OFF;
610 led->cdev_led2r.brightness_set = bd2802_set_led2r_brightness;
611 led->cdev_led2r.blink_set = bd2802_set_led2r_blink;
0b56129b
KK		 612
613 ret = led_classdev_register(&led->client->dev, &led->cdev_led2r);
614 if (ret < 0) {
615 dev_err(&led->client->dev, "couldn't register LED %s\n",
616 led->cdev_led2r.name);
617 goto failed_unregister_led2_R;
618 }
619
620 led->cdev_led2g.name = "led2_G";
621 led->cdev_led2g.brightness = LED_OFF;
622 led->cdev_led2g.brightness_set = bd2802_set_led2g_brightness;
623 led->cdev_led2g.blink_set = bd2802_set_led2g_blink;
0b56129b
KK		 624
625 ret = led_classdev_register(&led->client->dev, &led->cdev_led2g);
626 if (ret < 0) {
627 dev_err(&led->client->dev, "couldn't register LED %s\n",
628 led->cdev_led2g.name);
629 goto failed_unregister_led2_G;
630 }
631
632 led->cdev_led2b.name = "led2_B";
633 led->cdev_led2b.brightness = LED_OFF;
634 led->cdev_led2b.brightness_set = bd2802_set_led2b_brightness;
635 led->cdev_led2b.blink_set = bd2802_set_led2b_blink;
636 led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME;
637
638 ret = led_classdev_register(&led->client->dev, &led->cdev_led2b);
639 if (ret < 0) {
640 dev_err(&led->client->dev, "couldn't register LED %s\n",
641 led->cdev_led2b.name);
642 goto failed_unregister_led2_B;
643 }
644
645 return 0;
646
647failed_unregister_led2_B:
648 led_classdev_unregister(&led->cdev_led2g);
649failed_unregister_led2_G:
650 led_classdev_unregister(&led->cdev_led2r);
651failed_unregister_led2_R:
652 led_classdev_unregister(&led->cdev_led1b);
653failed_unregister_led1_B:
654 led_classdev_unregister(&led->cdev_led1g);
655failed_unregister_led1_G:
656 led_classdev_unregister(&led->cdev_led1r);
657failed_unregister_led1_R:
658
659 return ret;
660}
661
662static void bd2802_unregister_led_classdev(struct bd2802_led *led)
663{
664 cancel_work_sync(&led->work);
1424e21f
AL		 665 led_classdev_unregister(&led->cdev_led2b);
666 led_classdev_unregister(&led->cdev_led2g);
667 led_classdev_unregister(&led->cdev_led2r);
668 led_classdev_unregister(&led->cdev_led1b);
669 led_classdev_unregister(&led->cdev_led1g);
0b56129b
KK		 670 led_classdev_unregister(&led->cdev_led1r);
671}
672
98ea1ea2 673static int bd2802_probe(struct i2c_client *client,
0b56129b
KK		 674 const struct i2c_device_id *id)
675{
676 struct bd2802_led *led;
677 struct bd2802_led_platform_data *pdata;
8792f7cf 678 int ret, i;
0b56129b 679
ac63ff50 680 led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
0b56129b
KK		 681 if (!led) {
682 dev_err(&client->dev, "failed to allocate driver data\n");
683 return -ENOMEM;
684 }
685
686 led->client = client;
87aae1ea 687 pdata = led->pdata = dev_get_platdata(&client->dev);
0b56129b
KK		 688 i2c_set_clientdata(client, led);
689
690 /* Configure RESET GPIO (L: RESET, H: RESET cancel) */
95dafd47 691 gpio_request_one(pdata->reset_gpio, GPIOF_OUT_INIT_HIGH, "RGB_RESETB");
0b56129b
KK		 692
693 /* Tacss = min 0.1ms */
694 udelay(100);
695
696 /* Detect BD2802GU */
697 ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00);
698 if (ret < 0) {
699 dev_err(&client->dev, "failed to detect device\n");
ac63ff50 700 return ret;
0b56129b
KK		 701 } else
702 dev_info(&client->dev, "return 0x%02x\n", ret);
703
704 /* To save the power, reset BD2802 after detecting */
705 gpio_set_value(led->pdata->reset_gpio, 0);
706
8792f7cf
KK		 707 /* Default attributes */
708 led->wave_pattern = BD2802_PATTERN_HALF;
709 led->rgb_current = BD2802_CURRENT_032;
710
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KK		 711 init_rwsem(&led->rwsem);
712
8792f7cf
KK		 713 for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) {
714 ret = device_create_file(&led->client->dev,
715 bd2802_attributes[i]);
716 if (ret) {
717 dev_err(&led->client->dev, "failed: sysfs file %s\n",
718 bd2802_attributes[i]->attr.name);
719 goto failed_unregister_dev_file;
720 }
0b56129b
KK		 721 }
722
723 ret = bd2802_register_led_classdev(led);
724 if (ret < 0)
725 goto failed_unregister_dev_file;
726
727 return 0;
728
729failed_unregister_dev_file:
8792f7cf
KK		 730 for (i--; i >= 0; i--)
731 device_remove_file(&led->client->dev, bd2802_attributes[i]);
0b56129b
KK		 732 return ret;
733}
734
e9dd68cf 735static int bd2802_remove(struct i2c_client *client)
0b56129b
KK		 736{
737 struct bd2802_led *led = i2c_get_clientdata(client);
8792f7cf 738 int i;
0b56129b 739
0b56129b 740 gpio_set_value(led->pdata->reset_gpio, 0);
8792f7cf 741 bd2802_unregister_led_classdev(led);
0b56129b
KK		 742 if (led->adf_on)
743 bd2802_disable_adv_conf(led);
8792f7cf
KK		 744 for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++)
745 device_remove_file(&led->client->dev, bd2802_attributes[i]);
0b56129b
KK		 746
747 return 0;
748}
749
cceba0e4 750#ifdef CONFIG_PM_SLEEP
551ea738 751static void bd2802_restore_state(struct bd2802_led *led)
0b56129b 752{
551ea738
MB		 753 int i;
754
755 for (i = 0; i < LED_NUM; i++) {
756 if (led->led[i].r)
757 bd2802_turn_on(led, i, RED, led->led[i].r);
758 if (led->led[i].g)
759 bd2802_turn_on(led, i, GREEN, led->led[i].g);
760 if (led->led[i].b)
761 bd2802_turn_on(led, i, BLUE, led->led[i].b);
762 }
763}
764
765static int bd2802_suspend(struct device *dev)
766{
767 struct i2c_client *client = to_i2c_client(dev);
0b56129b
KK		 768 struct bd2802_led *led = i2c_get_clientdata(client);
769
770 gpio_set_value(led->pdata->reset_gpio, 0);
771
772 return 0;
773}
774
551ea738 775static int bd2802_resume(struct device *dev)
0b56129b 776{
551ea738 777 struct i2c_client *client = to_i2c_client(dev);
0b56129b
KK		 778 struct bd2802_led *led = i2c_get_clientdata(client);
779
780 if (!bd2802_is_all_off(led) || led->adf_on) {
b8389018 781 bd2802_reset_cancel(led);
0b56129b
KK		 782 bd2802_restore_state(led);
783 }
784
785 return 0;
786}
cceba0e4 787#endif
0b56129b 788
551ea738 789static SIMPLE_DEV_PM_OPS(bd2802_pm, bd2802_suspend, bd2802_resume);
551ea738 790
0b56129b
KK		 791static const struct i2c_device_id bd2802_id[] = {
792 { "BD2802", 0 },
793 { }
794};
795MODULE_DEVICE_TABLE(i2c, bd2802_id);
796
797static struct i2c_driver bd2802_i2c_driver = {
798 .driver = {
799 .name = "BD2802",
cceba0e4 800 .pm = &bd2802_pm,
0b56129b
KK		 801 },
802 .probe = bd2802_probe,
e9dd68cf 803 .remove = bd2802_remove,
0b56129b
KK		 804 .id_table = bd2802_id,
805};
806
09a0d183 807module_i2c_driver(bd2802_i2c_driver);
0b56129b
KK		 808
809MODULE_AUTHOR("Kim Kyuwon <[email protected]>");
810MODULE_DESCRIPTION("BD2802 LED driver");
1b18cf41 811MODULE_LICENSE("GPL v2");
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