Commit | Line | Data |
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0b56129b KK |
1 | /* |
2 | * leds-bd2802.c - RGB LED Driver | |
3 | * | |
4 | * Copyright (C) 2009 Samsung Electronics | |
5 | * Kim Kyuwon <q1.kim@samsung.com> | |
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> | |
21 | ||
22 | ||
23 | #define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0)) | |
24 | ||
25 | #define BD2802_LED_OFFSET 0xa | |
26 | #define BD2802_COLOR_OFFSET 0x3 | |
27 | ||
28 | #define BD2802_REG_CLKSETUP 0x00 | |
29 | #define BD2802_REG_CONTROL 0x01 | |
30 | #define BD2802_REG_HOURSETUP 0x02 | |
31 | #define BD2802_REG_CURRENT1SETUP 0x03 | |
32 | #define BD2802_REG_CURRENT2SETUP 0x04 | |
33 | #define BD2802_REG_WAVEPATTERN 0x05 | |
34 | ||
35 | #define BD2802_CURRENT_032 0x10 /* 3.2mA */ | |
36 | #define BD2802_CURRENT_000 0x00 /* 0.0mA */ | |
37 | ||
38 | #define BD2802_PATTERN_FULL 0x07 | |
39 | #define BD2802_PATTERN_HALF 0x03 | |
40 | ||
41 | enum led_ids { | |
42 | LED1, | |
43 | LED2, | |
44 | LED_NUM, | |
45 | }; | |
46 | ||
47 | enum led_colors { | |
48 | RED, | |
49 | GREEN, | |
50 | BLUE, | |
51 | }; | |
52 | ||
53 | enum led_bits { | |
54 | BD2802_OFF, | |
55 | BD2802_BLINK, | |
56 | BD2802_ON, | |
57 | }; | |
58 | ||
59 | /* | |
60 | * State '0' : 'off' | |
61 | * State '1' : 'blink' | |
62 | * State '2' : 'on'. | |
63 | */ | |
64 | struct led_state { | |
65 | unsigned r:2; | |
66 | unsigned g:2; | |
67 | unsigned b:2; | |
68 | }; | |
69 | ||
70 | struct bd2802_led { | |
71 | struct bd2802_led_platform_data *pdata; | |
72 | struct i2c_client *client; | |
73 | struct rw_semaphore rwsem; | |
74 | struct work_struct work; | |
75 | ||
76 | struct led_state led[2]; | |
77 | ||
78 | /* | |
79 | * Making led_classdev as array is not recommended, because array | |
80 | * members prevent using 'container_of' macro. So repetitive works | |
81 | * are needed. | |
82 | */ | |
83 | struct led_classdev cdev_led1r; | |
84 | struct led_classdev cdev_led1g; | |
85 | struct led_classdev cdev_led1b; | |
86 | struct led_classdev cdev_led2r; | |
87 | struct led_classdev cdev_led2g; | |
88 | struct led_classdev cdev_led2b; | |
89 | ||
90 | /* | |
91 | * Advanced Configuration Function(ADF) mode: | |
92 | * In ADF mode, user can set registers of BD2802GU directly, | |
93 | * therefore BD2802GU doesn't enter reset state. | |
94 | */ | |
95 | int adf_on; | |
96 | ||
97 | enum led_ids led_id; | |
98 | enum led_colors color; | |
99 | enum led_bits state; | |
100 | }; | |
101 | ||
102 | ||
103 | /*--------------------------------------------------------------*/ | |
104 | /* BD2802GU helper functions */ | |
105 | /*--------------------------------------------------------------*/ | |
106 | ||
107 | static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id, | |
108 | enum led_colors color) | |
109 | { | |
110 | switch (color) { | |
111 | case RED: | |
112 | return !led->led[id].r; | |
113 | case GREEN: | |
114 | return !led->led[id].g; | |
115 | case BLUE: | |
116 | return !led->led[id].b; | |
117 | default: | |
118 | dev_err(&led->client->dev, "%s: Invalid color\n", __func__); | |
119 | return -EINVAL; | |
120 | } | |
121 | } | |
122 | ||
123 | static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id) | |
124 | { | |
125 | if (led->led[id].r || led->led[id].g || led->led[id].b) | |
126 | return 0; | |
127 | ||
128 | return 1; | |
129 | } | |
130 | ||
131 | static inline int bd2802_is_all_off(struct bd2802_led *led) | |
132 | { | |
133 | int i; | |
134 | ||
135 | for (i = 0; i < LED_NUM; i++) | |
136 | if (!bd2802_is_led_off(led, i)) | |
137 | return 0; | |
138 | ||
139 | return 1; | |
140 | } | |
141 | ||
142 | static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color) | |
143 | { | |
144 | return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET; | |
145 | } | |
146 | ||
147 | static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color, | |
148 | u8 reg_offset) | |
149 | { | |
150 | return reg_offset + bd2802_get_base_offset(id, color); | |
151 | } | |
152 | ||
153 | ||
154 | /*--------------------------------------------------------------*/ | |
155 | /* BD2802GU core functions */ | |
156 | /*--------------------------------------------------------------*/ | |
157 | ||
158 | static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val) | |
159 | { | |
160 | int ret = i2c_smbus_write_byte_data(client, reg, val); | |
161 | if (ret >= 0) | |
162 | return 0; | |
163 | ||
164 | dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", | |
165 | __func__, reg, val, ret); | |
166 | ||
167 | return ret; | |
168 | } | |
169 | ||
170 | static void bd2802_update_state(struct bd2802_led *led, enum led_ids id, | |
171 | enum led_colors color, enum led_bits led_bit) | |
172 | { | |
173 | int i; | |
174 | u8 value; | |
175 | ||
176 | for (i = 0; i < LED_NUM; i++) { | |
177 | if (i == id) { | |
178 | switch (color) { | |
179 | case RED: | |
180 | led->led[i].r = led_bit; | |
181 | break; | |
182 | case GREEN: | |
183 | led->led[i].g = led_bit; | |
184 | break; | |
185 | case BLUE: | |
186 | led->led[i].b = led_bit; | |
187 | break; | |
188 | default: | |
189 | dev_err(&led->client->dev, | |
190 | "%s: Invalid color\n", __func__); | |
191 | return; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | if (led_bit == BD2802_BLINK || led_bit == BD2802_ON) | |
197 | return; | |
198 | ||
199 | if (!bd2802_is_led_off(led, id)) | |
200 | return; | |
201 | ||
202 | if (bd2802_is_all_off(led) && !led->adf_on) { | |
203 | gpio_set_value(led->pdata->reset_gpio, 0); | |
204 | return; | |
205 | } | |
206 | ||
207 | /* | |
208 | * In this case, other led is turned on, and current led is turned | |
209 | * off. So set RGB LED Control register to stop the current RGB LED | |
210 | */ | |
211 | value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1); | |
212 | bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); | |
213 | } | |
214 | ||
215 | static void bd2802_configure(struct bd2802_led *led) | |
216 | { | |
217 | struct bd2802_led_platform_data *pdata = led->pdata; | |
218 | u8 reg; | |
219 | ||
220 | reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP); | |
221 | bd2802_write_byte(led->client, reg, pdata->rgb_time); | |
222 | ||
223 | reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP); | |
224 | bd2802_write_byte(led->client, reg, pdata->rgb_time); | |
225 | } | |
226 | ||
227 | static void bd2802_reset_cancel(struct bd2802_led *led) | |
228 | { | |
229 | gpio_set_value(led->pdata->reset_gpio, 1); | |
230 | udelay(100); | |
231 | bd2802_configure(led); | |
232 | } | |
233 | ||
234 | static void bd2802_enable(struct bd2802_led *led, enum led_ids id) | |
235 | { | |
236 | enum led_ids other_led = (id == LED1) ? LED2 : LED1; | |
237 | u8 value, other_led_on; | |
238 | ||
239 | other_led_on = !bd2802_is_led_off(led, other_led); | |
240 | if (id == LED1) | |
241 | value = LED_CTL(other_led_on, 1); | |
242 | else | |
243 | value = LED_CTL(1 , other_led_on); | |
244 | ||
245 | bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); | |
246 | } | |
247 | ||
248 | static void bd2802_set_on(struct bd2802_led *led, enum led_ids id, | |
249 | enum led_colors color) | |
250 | { | |
251 | u8 reg; | |
252 | ||
253 | if (bd2802_is_all_off(led) && !led->adf_on) | |
254 | bd2802_reset_cancel(led); | |
255 | ||
256 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
257 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_032); | |
258 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); | |
259 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
260 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); | |
261 | bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL); | |
262 | ||
263 | bd2802_enable(led, id); | |
264 | bd2802_update_state(led, id, color, BD2802_ON); | |
265 | } | |
266 | ||
267 | static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id, | |
268 | enum led_colors color) | |
269 | { | |
270 | u8 reg; | |
271 | ||
272 | if (bd2802_is_all_off(led) && !led->adf_on) | |
273 | bd2802_reset_cancel(led); | |
274 | ||
275 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
276 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
277 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); | |
278 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_032); | |
279 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); | |
280 | bd2802_write_byte(led->client, reg, BD2802_PATTERN_HALF); | |
281 | ||
282 | bd2802_enable(led, id); | |
283 | bd2802_update_state(led, id, color, BD2802_BLINK); | |
284 | } | |
285 | ||
286 | static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id, | |
287 | enum led_colors color, enum led_bits led_bit) | |
288 | { | |
289 | if (led_bit == BD2802_OFF) { | |
290 | dev_err(&led->client->dev, | |
291 | "Only 'blink' and 'on' are allowed\n"); | |
292 | return; | |
293 | } | |
294 | ||
295 | if (led_bit == BD2802_BLINK) | |
296 | bd2802_set_blink(led, id, color); | |
297 | else | |
298 | bd2802_set_on(led, id, color); | |
299 | } | |
300 | ||
301 | static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id, | |
302 | enum led_colors color) | |
303 | { | |
304 | u8 reg; | |
305 | ||
306 | if (bd2802_is_rgb_off(led, id, color)) | |
307 | return; | |
308 | ||
309 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); | |
310 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
311 | reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); | |
312 | bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); | |
313 | ||
314 | bd2802_update_state(led, id, color, BD2802_OFF); | |
315 | } | |
316 | ||
317 | static void bd2802_restore_state(struct bd2802_led *led) | |
318 | { | |
319 | int i; | |
320 | ||
321 | for (i = 0; i < LED_NUM; i++) { | |
322 | if (led->led[i].r) | |
323 | bd2802_turn_on(led, i, RED, led->led[i].r); | |
324 | if (led->led[i].g) | |
325 | bd2802_turn_on(led, i, GREEN, led->led[i].g); | |
326 | if (led->led[i].b) | |
327 | bd2802_turn_on(led, i, BLUE, led->led[i].b); | |
328 | } | |
329 | } | |
330 | ||
331 | #define BD2802_SET_REGISTER(reg_addr, reg_name) \ | |
332 | static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \ | |
333 | struct device_attribute *attr, const char *buf, size_t count) \ | |
334 | { \ | |
335 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ | |
336 | unsigned long val; \ | |
337 | int ret; \ | |
338 | if (!count) \ | |
339 | return -EINVAL; \ | |
340 | ret = strict_strtoul(buf, 16, &val); \ | |
341 | if (ret) \ | |
342 | return ret; \ | |
343 | down_write(&led->rwsem); \ | |
344 | bd2802_write_byte(led->client, reg_addr, (u8) val); \ | |
345 | up_write(&led->rwsem); \ | |
346 | return count; \ | |
347 | } \ | |
348 | static struct device_attribute bd2802_reg##reg_addr##_attr = { \ | |
349 | .attr = {.name = reg_name, .mode = 0644, .owner = THIS_MODULE}, \ | |
350 | .store = bd2802_store_reg##reg_addr, \ | |
351 | }; | |
352 | ||
353 | BD2802_SET_REGISTER(0x00, "0x00"); | |
354 | BD2802_SET_REGISTER(0x01, "0x01"); | |
355 | BD2802_SET_REGISTER(0x02, "0x02"); | |
356 | BD2802_SET_REGISTER(0x03, "0x03"); | |
357 | BD2802_SET_REGISTER(0x04, "0x04"); | |
358 | BD2802_SET_REGISTER(0x05, "0x05"); | |
359 | BD2802_SET_REGISTER(0x06, "0x06"); | |
360 | BD2802_SET_REGISTER(0x07, "0x07"); | |
361 | BD2802_SET_REGISTER(0x08, "0x08"); | |
362 | BD2802_SET_REGISTER(0x09, "0x09"); | |
363 | BD2802_SET_REGISTER(0x0a, "0x0a"); | |
364 | BD2802_SET_REGISTER(0x0b, "0x0b"); | |
365 | BD2802_SET_REGISTER(0x0c, "0x0c"); | |
366 | BD2802_SET_REGISTER(0x0d, "0x0d"); | |
367 | BD2802_SET_REGISTER(0x0e, "0x0e"); | |
368 | BD2802_SET_REGISTER(0x0f, "0x0f"); | |
369 | BD2802_SET_REGISTER(0x10, "0x10"); | |
370 | BD2802_SET_REGISTER(0x11, "0x11"); | |
371 | BD2802_SET_REGISTER(0x12, "0x12"); | |
372 | BD2802_SET_REGISTER(0x13, "0x13"); | |
373 | BD2802_SET_REGISTER(0x14, "0x14"); | |
374 | BD2802_SET_REGISTER(0x15, "0x15"); | |
375 | ||
376 | static struct device_attribute *bd2802_addr_attributes[] = { | |
377 | &bd2802_reg0x00_attr, | |
378 | &bd2802_reg0x01_attr, | |
379 | &bd2802_reg0x02_attr, | |
380 | &bd2802_reg0x03_attr, | |
381 | &bd2802_reg0x04_attr, | |
382 | &bd2802_reg0x05_attr, | |
383 | &bd2802_reg0x06_attr, | |
384 | &bd2802_reg0x07_attr, | |
385 | &bd2802_reg0x08_attr, | |
386 | &bd2802_reg0x09_attr, | |
387 | &bd2802_reg0x0a_attr, | |
388 | &bd2802_reg0x0b_attr, | |
389 | &bd2802_reg0x0c_attr, | |
390 | &bd2802_reg0x0d_attr, | |
391 | &bd2802_reg0x0e_attr, | |
392 | &bd2802_reg0x0f_attr, | |
393 | &bd2802_reg0x10_attr, | |
394 | &bd2802_reg0x11_attr, | |
395 | &bd2802_reg0x12_attr, | |
396 | &bd2802_reg0x13_attr, | |
397 | &bd2802_reg0x14_attr, | |
398 | &bd2802_reg0x15_attr, | |
399 | }; | |
400 | ||
401 | static void bd2802_enable_adv_conf(struct bd2802_led *led) | |
402 | { | |
403 | int i, ret; | |
404 | ||
405 | for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) { | |
406 | ret = device_create_file(&led->client->dev, | |
407 | bd2802_addr_attributes[i]); | |
408 | if (ret) { | |
409 | dev_err(&led->client->dev, "failed to sysfs file %s\n", | |
410 | bd2802_addr_attributes[i]->attr.name); | |
411 | goto failed_remove_files; | |
412 | } | |
413 | } | |
414 | ||
415 | if (bd2802_is_all_off(led)) | |
416 | bd2802_reset_cancel(led); | |
417 | ||
418 | led->adf_on = 1; | |
419 | ||
420 | return; | |
421 | ||
422 | failed_remove_files: | |
423 | for (i--; i >= 0; i--) | |
424 | device_remove_file(&led->client->dev, | |
425 | bd2802_addr_attributes[i]); | |
426 | } | |
427 | ||
428 | static void bd2802_disable_adv_conf(struct bd2802_led *led) | |
429 | { | |
430 | int i; | |
431 | ||
432 | for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) | |
433 | device_remove_file(&led->client->dev, | |
434 | bd2802_addr_attributes[i]); | |
435 | ||
436 | if (bd2802_is_all_off(led)) | |
437 | gpio_set_value(led->pdata->reset_gpio, 0); | |
438 | ||
439 | led->adf_on = 0; | |
440 | } | |
441 | ||
442 | static ssize_t bd2802_show_adv_conf(struct device *dev, | |
443 | struct device_attribute *attr, char *buf) | |
444 | { | |
445 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
446 | ssize_t ret; | |
447 | ||
448 | down_read(&led->rwsem); | |
449 | if (led->adf_on) | |
450 | ret = sprintf(buf, "on\n"); | |
451 | else | |
452 | ret = sprintf(buf, "off\n"); | |
453 | up_read(&led->rwsem); | |
454 | ||
455 | return ret; | |
456 | } | |
457 | ||
458 | static ssize_t bd2802_store_adv_conf(struct device *dev, | |
459 | struct device_attribute *attr, const char *buf, size_t count) | |
460 | { | |
461 | struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
462 | ||
463 | if (!count) | |
464 | return -EINVAL; | |
465 | ||
466 | down_write(&led->rwsem); | |
467 | if (!led->adf_on && !strncmp(buf, "on", 2)) | |
468 | bd2802_enable_adv_conf(led); | |
469 | else if (led->adf_on && !strncmp(buf, "off", 3)) | |
470 | bd2802_disable_adv_conf(led); | |
471 | up_write(&led->rwsem); | |
472 | ||
473 | return count; | |
474 | } | |
475 | ||
476 | static struct device_attribute bd2802_adv_conf_attr = { | |
477 | .attr = { | |
478 | .name = "advanced_configuration", | |
479 | .mode = 0644, | |
480 | .owner = THIS_MODULE | |
481 | }, | |
482 | .show = bd2802_show_adv_conf, | |
483 | .store = bd2802_store_adv_conf, | |
484 | }; | |
485 | ||
486 | static void bd2802_led_work(struct work_struct *work) | |
487 | { | |
488 | struct bd2802_led *led = container_of(work, struct bd2802_led, work); | |
489 | ||
490 | if (led->state) | |
491 | bd2802_turn_on(led, led->led_id, led->color, led->state); | |
492 | else | |
493 | bd2802_turn_off(led, led->led_id, led->color); | |
494 | } | |
495 | ||
496 | #define BD2802_CONTROL_RGBS(name, id, clr) \ | |
497 | static void bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\ | |
498 | enum led_brightness value) \ | |
499 | { \ | |
500 | struct bd2802_led *led = \ | |
501 | container_of(led_cdev, struct bd2802_led, cdev_##name); \ | |
502 | led->led_id = id; \ | |
503 | led->color = clr; \ | |
504 | if (value == LED_OFF) \ | |
505 | led->state = BD2802_OFF; \ | |
506 | else \ | |
507 | led->state = BD2802_ON; \ | |
508 | schedule_work(&led->work); \ | |
509 | } \ | |
510 | static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \ | |
511 | unsigned long *delay_on, unsigned long *delay_off) \ | |
512 | { \ | |
513 | struct bd2802_led *led = \ | |
514 | container_of(led_cdev, struct bd2802_led, cdev_##name); \ | |
515 | if (*delay_on == 0 || *delay_off == 0) \ | |
516 | return -EINVAL; \ | |
517 | led->led_id = id; \ | |
518 | led->color = clr; \ | |
519 | led->state = BD2802_BLINK; \ | |
520 | schedule_work(&led->work); \ | |
521 | return 0; \ | |
522 | } | |
523 | ||
524 | BD2802_CONTROL_RGBS(led1r, LED1, RED); | |
525 | BD2802_CONTROL_RGBS(led1g, LED1, GREEN); | |
526 | BD2802_CONTROL_RGBS(led1b, LED1, BLUE); | |
527 | BD2802_CONTROL_RGBS(led2r, LED2, RED); | |
528 | BD2802_CONTROL_RGBS(led2g, LED2, GREEN); | |
529 | BD2802_CONTROL_RGBS(led2b, LED2, BLUE); | |
530 | ||
531 | static int bd2802_register_led_classdev(struct bd2802_led *led) | |
532 | { | |
533 | int ret; | |
534 | ||
535 | INIT_WORK(&led->work, bd2802_led_work); | |
536 | ||
537 | led->cdev_led1r.name = "led1_R"; | |
538 | led->cdev_led1r.brightness = LED_OFF; | |
539 | led->cdev_led1r.brightness_set = bd2802_set_led1r_brightness; | |
540 | led->cdev_led1r.blink_set = bd2802_set_led1r_blink; | |
0b56129b KK |
541 | |
542 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1r); | |
543 | if (ret < 0) { | |
544 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
545 | led->cdev_led1r.name); | |
546 | goto failed_unregister_led1_R; | |
547 | } | |
548 | ||
549 | led->cdev_led1g.name = "led1_G"; | |
550 | led->cdev_led1g.brightness = LED_OFF; | |
551 | led->cdev_led1g.brightness_set = bd2802_set_led1g_brightness; | |
552 | led->cdev_led1g.blink_set = bd2802_set_led1g_blink; | |
0b56129b KK |
553 | |
554 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1g); | |
555 | if (ret < 0) { | |
556 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
557 | led->cdev_led1g.name); | |
558 | goto failed_unregister_led1_G; | |
559 | } | |
560 | ||
561 | led->cdev_led1b.name = "led1_B"; | |
562 | led->cdev_led1b.brightness = LED_OFF; | |
563 | led->cdev_led1b.brightness_set = bd2802_set_led1b_brightness; | |
564 | led->cdev_led1b.blink_set = bd2802_set_led1b_blink; | |
0b56129b KK |
565 | |
566 | ret = led_classdev_register(&led->client->dev, &led->cdev_led1b); | |
567 | if (ret < 0) { | |
568 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
569 | led->cdev_led1b.name); | |
570 | goto failed_unregister_led1_B; | |
571 | } | |
572 | ||
573 | led->cdev_led2r.name = "led2_R"; | |
574 | led->cdev_led2r.brightness = LED_OFF; | |
575 | led->cdev_led2r.brightness_set = bd2802_set_led2r_brightness; | |
576 | led->cdev_led2r.blink_set = bd2802_set_led2r_blink; | |
0b56129b KK |
577 | |
578 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2r); | |
579 | if (ret < 0) { | |
580 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
581 | led->cdev_led2r.name); | |
582 | goto failed_unregister_led2_R; | |
583 | } | |
584 | ||
585 | led->cdev_led2g.name = "led2_G"; | |
586 | led->cdev_led2g.brightness = LED_OFF; | |
587 | led->cdev_led2g.brightness_set = bd2802_set_led2g_brightness; | |
588 | led->cdev_led2g.blink_set = bd2802_set_led2g_blink; | |
0b56129b KK |
589 | |
590 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2g); | |
591 | if (ret < 0) { | |
592 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
593 | led->cdev_led2g.name); | |
594 | goto failed_unregister_led2_G; | |
595 | } | |
596 | ||
597 | led->cdev_led2b.name = "led2_B"; | |
598 | led->cdev_led2b.brightness = LED_OFF; | |
599 | led->cdev_led2b.brightness_set = bd2802_set_led2b_brightness; | |
600 | led->cdev_led2b.blink_set = bd2802_set_led2b_blink; | |
601 | led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME; | |
602 | ||
603 | ret = led_classdev_register(&led->client->dev, &led->cdev_led2b); | |
604 | if (ret < 0) { | |
605 | dev_err(&led->client->dev, "couldn't register LED %s\n", | |
606 | led->cdev_led2b.name); | |
607 | goto failed_unregister_led2_B; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | ||
612 | failed_unregister_led2_B: | |
613 | led_classdev_unregister(&led->cdev_led2g); | |
614 | failed_unregister_led2_G: | |
615 | led_classdev_unregister(&led->cdev_led2r); | |
616 | failed_unregister_led2_R: | |
617 | led_classdev_unregister(&led->cdev_led1b); | |
618 | failed_unregister_led1_B: | |
619 | led_classdev_unregister(&led->cdev_led1g); | |
620 | failed_unregister_led1_G: | |
621 | led_classdev_unregister(&led->cdev_led1r); | |
622 | failed_unregister_led1_R: | |
623 | ||
624 | return ret; | |
625 | } | |
626 | ||
627 | static void bd2802_unregister_led_classdev(struct bd2802_led *led) | |
628 | { | |
629 | cancel_work_sync(&led->work); | |
630 | led_classdev_unregister(&led->cdev_led1r); | |
631 | } | |
632 | ||
633 | static int __devinit bd2802_probe(struct i2c_client *client, | |
634 | const struct i2c_device_id *id) | |
635 | { | |
636 | struct bd2802_led *led; | |
637 | struct bd2802_led_platform_data *pdata; | |
638 | int ret; | |
639 | ||
640 | led = kzalloc(sizeof(struct bd2802_led), GFP_KERNEL); | |
641 | if (!led) { | |
642 | dev_err(&client->dev, "failed to allocate driver data\n"); | |
643 | return -ENOMEM; | |
644 | } | |
645 | ||
646 | led->client = client; | |
647 | pdata = led->pdata = client->dev.platform_data; | |
648 | i2c_set_clientdata(client, led); | |
649 | ||
650 | /* Configure RESET GPIO (L: RESET, H: RESET cancel) */ | |
651 | gpio_request(pdata->reset_gpio, "RGB_RESETB"); | |
652 | gpio_direction_output(pdata->reset_gpio, 1); | |
653 | ||
654 | /* Tacss = min 0.1ms */ | |
655 | udelay(100); | |
656 | ||
657 | /* Detect BD2802GU */ | |
658 | ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00); | |
659 | if (ret < 0) { | |
660 | dev_err(&client->dev, "failed to detect device\n"); | |
661 | goto failed_free; | |
662 | } else | |
663 | dev_info(&client->dev, "return 0x%02x\n", ret); | |
664 | ||
665 | /* To save the power, reset BD2802 after detecting */ | |
666 | gpio_set_value(led->pdata->reset_gpio, 0); | |
667 | ||
668 | init_rwsem(&led->rwsem); | |
669 | ||
670 | ret = device_create_file(&client->dev, &bd2802_adv_conf_attr); | |
671 | if (ret) { | |
672 | dev_err(&client->dev, "failed to create sysfs file %s\n", | |
673 | bd2802_adv_conf_attr.attr.name); | |
674 | goto failed_free; | |
675 | } | |
676 | ||
677 | ret = bd2802_register_led_classdev(led); | |
678 | if (ret < 0) | |
679 | goto failed_unregister_dev_file; | |
680 | ||
681 | return 0; | |
682 | ||
683 | failed_unregister_dev_file: | |
684 | device_remove_file(&client->dev, &bd2802_adv_conf_attr); | |
685 | failed_free: | |
686 | i2c_set_clientdata(client, NULL); | |
687 | kfree(led); | |
688 | ||
689 | return ret; | |
690 | } | |
691 | ||
692 | static int __exit bd2802_remove(struct i2c_client *client) | |
693 | { | |
694 | struct bd2802_led *led = i2c_get_clientdata(client); | |
695 | ||
696 | bd2802_unregister_led_classdev(led); | |
697 | gpio_set_value(led->pdata->reset_gpio, 0); | |
698 | if (led->adf_on) | |
699 | bd2802_disable_adv_conf(led); | |
700 | device_remove_file(&client->dev, &bd2802_adv_conf_attr); | |
701 | i2c_set_clientdata(client, NULL); | |
702 | kfree(led); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | static int bd2802_suspend(struct i2c_client *client, pm_message_t mesg) | |
708 | { | |
709 | struct bd2802_led *led = i2c_get_clientdata(client); | |
710 | ||
711 | gpio_set_value(led->pdata->reset_gpio, 0); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int bd2802_resume(struct i2c_client *client) | |
717 | { | |
718 | struct bd2802_led *led = i2c_get_clientdata(client); | |
719 | ||
720 | if (!bd2802_is_all_off(led) || led->adf_on) { | |
b8389018 | 721 | bd2802_reset_cancel(led); |
0b56129b KK |
722 | bd2802_restore_state(led); |
723 | } | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static const struct i2c_device_id bd2802_id[] = { | |
729 | { "BD2802", 0 }, | |
730 | { } | |
731 | }; | |
732 | MODULE_DEVICE_TABLE(i2c, bd2802_id); | |
733 | ||
734 | static struct i2c_driver bd2802_i2c_driver = { | |
735 | .driver = { | |
736 | .name = "BD2802", | |
737 | }, | |
738 | .probe = bd2802_probe, | |
739 | .remove = __exit_p(bd2802_remove), | |
740 | .suspend = bd2802_suspend, | |
741 | .resume = bd2802_resume, | |
742 | .id_table = bd2802_id, | |
743 | }; | |
744 | ||
745 | static int __init bd2802_init(void) | |
746 | { | |
747 | return i2c_add_driver(&bd2802_i2c_driver); | |
748 | } | |
749 | module_init(bd2802_init); | |
750 | ||
751 | static void __exit bd2802_exit(void) | |
752 | { | |
753 | i2c_del_driver(&bd2802_i2c_driver); | |
754 | } | |
755 | module_exit(bd2802_exit); | |
756 | ||
757 | MODULE_AUTHOR("Kim Kyuwon <q1.kim@samsung.com>"); | |
758 | MODULE_DESCRIPTION("BD2802 LED driver"); | |
759 | MODULE_LICENSE("GPL"); |