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ff45262a KM |
1 | /* |
2 | * LP5562 LED driver | |
3 | * | |
4 | * Copyright (C) 2013 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 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/firmware.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/leds.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/mutex.h> | |
20 | #include <linux/platform_data/leds-lp55xx.h> | |
21 | #include <linux/slab.h> | |
22 | ||
23 | #include "leds-lp55xx-common.h" | |
24 | ||
25 | #define LP5562_PROGRAM_LENGTH 32 | |
26 | #define LP5562_MAX_LEDS 4 | |
27 | ||
28 | /* ENABLE Register 00h */ | |
29 | #define LP5562_REG_ENABLE 0x00 | |
30 | #define LP5562_EXEC_ENG1_M 0x30 | |
31 | #define LP5562_EXEC_ENG2_M 0x0C | |
32 | #define LP5562_EXEC_ENG3_M 0x03 | |
33 | #define LP5562_EXEC_M 0x3F | |
34 | #define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */ | |
35 | #define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ | |
36 | #define LP5562_EXEC_RUN 0x2A | |
37 | #define LP5562_ENABLE_DEFAULT \ | |
38 | (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM) | |
39 | #define LP5562_ENABLE_RUN_PROGRAM \ | |
40 | (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN) | |
41 | ||
42 | /* OPMODE Register 01h */ | |
43 | #define LP5562_REG_OP_MODE 0x01 | |
44 | #define LP5562_MODE_ENG1_M 0x30 | |
45 | #define LP5562_MODE_ENG2_M 0x0C | |
46 | #define LP5562_MODE_ENG3_M 0x03 | |
47 | #define LP5562_LOAD_ENG1 0x10 | |
48 | #define LP5562_LOAD_ENG2 0x04 | |
49 | #define LP5562_LOAD_ENG3 0x01 | |
50 | #define LP5562_RUN_ENG1 0x20 | |
51 | #define LP5562_RUN_ENG2 0x08 | |
52 | #define LP5562_RUN_ENG3 0x02 | |
53 | #define LP5562_ENG1_IS_LOADING(mode) \ | |
54 | ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1) | |
55 | #define LP5562_ENG2_IS_LOADING(mode) \ | |
56 | ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2) | |
57 | #define LP5562_ENG3_IS_LOADING(mode) \ | |
58 | ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3) | |
59 | ||
60 | /* BRIGHTNESS Registers */ | |
61 | #define LP5562_REG_R_PWM 0x04 | |
62 | #define LP5562_REG_G_PWM 0x03 | |
63 | #define LP5562_REG_B_PWM 0x02 | |
64 | #define LP5562_REG_W_PWM 0x0E | |
65 | ||
66 | /* CURRENT Registers */ | |
67 | #define LP5562_REG_R_CURRENT 0x07 | |
68 | #define LP5562_REG_G_CURRENT 0x06 | |
69 | #define LP5562_REG_B_CURRENT 0x05 | |
70 | #define LP5562_REG_W_CURRENT 0x0F | |
71 | ||
72 | /* CONFIG Register 08h */ | |
73 | #define LP5562_REG_CONFIG 0x08 | |
74 | #define LP5562_DEFAULT_CFG \ | |
75 | (LP5562_PWM_HF | LP5562_PWRSAVE_EN | LP5562_CLK_INT) | |
76 | ||
77 | /* RESET Register 0Dh */ | |
78 | #define LP5562_REG_RESET 0x0D | |
79 | #define LP5562_RESET 0xFF | |
80 | ||
81 | /* PROGRAM ENGINE Registers */ | |
82 | #define LP5562_REG_PROG_MEM_ENG1 0x10 | |
83 | #define LP5562_REG_PROG_MEM_ENG2 0x30 | |
84 | #define LP5562_REG_PROG_MEM_ENG3 0x50 | |
85 | ||
86 | /* LEDMAP Register 70h */ | |
87 | #define LP5562_REG_ENG_SEL 0x70 | |
88 | #define LP5562_ENG_SEL_PWM 0 | |
89 | #define LP5562_ENG_FOR_RGB_M 0x3F | |
90 | #define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */ | |
91 | #define LP5562_ENG_FOR_W_M 0xC0 | |
92 | #define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */ | |
93 | #define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */ | |
94 | #define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */ | |
95 | ||
96 | /* Program Commands */ | |
97 | #define LP5562_CMD_DISABLE 0x00 | |
98 | #define LP5562_CMD_LOAD 0x15 | |
99 | #define LP5562_CMD_RUN 0x2A | |
100 | #define LP5562_CMD_DIRECT 0x3F | |
101 | #define LP5562_PATTERN_OFF 0 | |
102 | ||
103 | static inline void lp5562_wait_opmode_done(void) | |
104 | { | |
105 | /* operation mode change needs to be longer than 153 us */ | |
106 | usleep_range(200, 300); | |
107 | } | |
108 | ||
109 | static inline void lp5562_wait_enable_done(void) | |
110 | { | |
111 | /* it takes more 488 us to update ENABLE register */ | |
112 | usleep_range(500, 600); | |
113 | } | |
114 | ||
115 | static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current) | |
116 | { | |
117 | u8 addr[] = { | |
118 | LP5562_REG_R_CURRENT, | |
119 | LP5562_REG_G_CURRENT, | |
120 | LP5562_REG_B_CURRENT, | |
121 | LP5562_REG_W_CURRENT, | |
122 | }; | |
123 | ||
124 | led->led_current = led_current; | |
125 | lp55xx_write(led->chip, addr[led->chan_nr], led_current); | |
126 | } | |
127 | ||
128 | static void lp5562_load_engine(struct lp55xx_chip *chip) | |
129 | { | |
130 | enum lp55xx_engine_index idx = chip->engine_idx; | |
131 | u8 mask[] = { | |
132 | [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M, | |
133 | [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M, | |
134 | [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M, | |
135 | }; | |
136 | ||
137 | u8 val[] = { | |
138 | [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1, | |
139 | [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2, | |
140 | [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3, | |
141 | }; | |
142 | ||
143 | lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]); | |
144 | ||
145 | lp5562_wait_opmode_done(); | |
146 | } | |
147 | ||
148 | static void lp5562_stop_engine(struct lp55xx_chip *chip) | |
149 | { | |
150 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE); | |
151 | lp5562_wait_opmode_done(); | |
152 | } | |
153 | ||
154 | static void lp5562_run_engine(struct lp55xx_chip *chip, bool start) | |
155 | { | |
156 | int ret; | |
157 | u8 mode; | |
158 | u8 exec; | |
159 | ||
160 | /* stop engine */ | |
161 | if (!start) { | |
162 | lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT); | |
163 | lp5562_wait_enable_done(); | |
164 | lp5562_stop_engine(chip); | |
165 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); | |
166 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); | |
167 | lp5562_wait_opmode_done(); | |
168 | return; | |
169 | } | |
170 | ||
171 | /* | |
172 | * To run the engine, | |
173 | * operation mode and enable register should updated at the same time | |
174 | */ | |
175 | ||
176 | ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode); | |
177 | if (ret) | |
178 | return; | |
179 | ||
180 | ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec); | |
181 | if (ret) | |
182 | return; | |
183 | ||
184 | /* change operation mode to RUN only when each engine is loading */ | |
185 | if (LP5562_ENG1_IS_LOADING(mode)) { | |
186 | mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1; | |
187 | exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1; | |
188 | } | |
189 | ||
190 | if (LP5562_ENG2_IS_LOADING(mode)) { | |
191 | mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2; | |
192 | exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2; | |
193 | } | |
194 | ||
195 | if (LP5562_ENG3_IS_LOADING(mode)) { | |
196 | mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3; | |
197 | exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3; | |
198 | } | |
199 | ||
200 | lp55xx_write(chip, LP5562_REG_OP_MODE, mode); | |
201 | lp5562_wait_opmode_done(); | |
202 | ||
203 | lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec); | |
204 | lp5562_wait_enable_done(); | |
205 | } | |
206 | ||
207 | static int lp5562_update_firmware(struct lp55xx_chip *chip, | |
208 | const u8 *data, size_t size) | |
209 | { | |
210 | enum lp55xx_engine_index idx = chip->engine_idx; | |
211 | u8 pattern[LP5562_PROGRAM_LENGTH] = {0}; | |
212 | u8 addr[] = { | |
213 | [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1, | |
214 | [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2, | |
215 | [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3, | |
216 | }; | |
217 | unsigned cmd; | |
218 | char c[3]; | |
219 | int program_size; | |
220 | int nrchars; | |
221 | int offset = 0; | |
222 | int ret; | |
223 | int i; | |
224 | ||
225 | /* clear program memory before updating */ | |
226 | for (i = 0; i < LP5562_PROGRAM_LENGTH; i++) | |
227 | lp55xx_write(chip, addr[idx] + i, 0); | |
228 | ||
229 | i = 0; | |
230 | while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) { | |
231 | /* separate sscanfs because length is working only for %s */ | |
232 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
233 | if (ret != 1) | |
234 | goto err; | |
235 | ||
236 | ret = sscanf(c, "%2x", &cmd); | |
237 | if (ret != 1) | |
238 | goto err; | |
239 | ||
240 | pattern[i] = (u8)cmd; | |
241 | offset += nrchars; | |
242 | i++; | |
243 | } | |
244 | ||
245 | /* Each instruction is 16bit long. Check that length is even */ | |
246 | if (i % 2) | |
247 | goto err; | |
248 | ||
249 | program_size = i; | |
250 | for (i = 0; i < program_size; i++) | |
251 | lp55xx_write(chip, addr[idx] + i, pattern[i]); | |
252 | ||
253 | return 0; | |
254 | ||
255 | err: | |
256 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
257 | return -EINVAL; | |
258 | } | |
259 | ||
260 | static void lp5562_firmware_loaded(struct lp55xx_chip *chip) | |
261 | { | |
262 | const struct firmware *fw = chip->fw; | |
263 | ||
264 | if (fw->size > LP5562_PROGRAM_LENGTH) { | |
265 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
266 | fw->size); | |
267 | return; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Program momery sequence | |
272 | * 1) set engine mode to "LOAD" | |
273 | * 2) write firmware data into program memory | |
274 | */ | |
275 | ||
276 | lp5562_load_engine(chip); | |
277 | lp5562_update_firmware(chip, fw->data, fw->size); | |
278 | } | |
279 | ||
280 | static int lp5562_post_init_device(struct lp55xx_chip *chip) | |
281 | { | |
282 | int ret; | |
283 | u8 update_cfg = chip->pdata->update_config ? : LP5562_DEFAULT_CFG; | |
284 | ||
285 | /* Set all PWMs to direct control mode */ | |
286 | ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); | |
287 | if (ret) | |
288 | return ret; | |
289 | ||
290 | lp5562_wait_opmode_done(); | |
291 | ||
292 | ret = lp55xx_write(chip, LP5562_REG_CONFIG, update_cfg); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
296 | /* Initialize all channels PWM to zero -> leds off */ | |
297 | lp55xx_write(chip, LP5562_REG_R_PWM, 0); | |
298 | lp55xx_write(chip, LP5562_REG_G_PWM, 0); | |
299 | lp55xx_write(chip, LP5562_REG_B_PWM, 0); | |
300 | lp55xx_write(chip, LP5562_REG_W_PWM, 0); | |
301 | ||
302 | /* Set LED map as register PWM by default */ | |
303 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | static void lp5562_led_brightness_work(struct work_struct *work) | |
309 | { | |
310 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, | |
311 | brightness_work); | |
312 | struct lp55xx_chip *chip = led->chip; | |
313 | u8 addr[] = { | |
314 | LP5562_REG_R_PWM, | |
315 | LP5562_REG_G_PWM, | |
316 | LP5562_REG_B_PWM, | |
317 | LP5562_REG_W_PWM, | |
318 | }; | |
319 | ||
320 | mutex_lock(&chip->lock); | |
321 | lp55xx_write(chip, addr[led->chan_nr], led->brightness); | |
322 | mutex_unlock(&chip->lock); | |
323 | } | |
324 | ||
325 | static void lp5562_write_program_memory(struct lp55xx_chip *chip, | |
326 | u8 base, const u8 *rgb, int size) | |
327 | { | |
328 | int i; | |
329 | ||
330 | if (!rgb || size <= 0) | |
331 | return; | |
332 | ||
333 | for (i = 0; i < size; i++) | |
334 | lp55xx_write(chip, base + i, *(rgb + i)); | |
335 | ||
336 | lp55xx_write(chip, base + i, 0); | |
337 | lp55xx_write(chip, base + i + 1, 0); | |
338 | } | |
339 | ||
340 | /* check the size of program count */ | |
341 | static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn) | |
342 | { | |
343 | return (ptn->size_r >= LP5562_PROGRAM_LENGTH || | |
344 | ptn->size_g >= LP5562_PROGRAM_LENGTH || | |
345 | ptn->size_b >= LP5562_PROGRAM_LENGTH); | |
346 | } | |
347 | ||
348 | static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode) | |
349 | { | |
350 | struct lp55xx_predef_pattern *ptn; | |
351 | int i; | |
352 | ||
353 | if (mode == LP5562_PATTERN_OFF) { | |
354 | lp5562_run_engine(chip, false); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | ptn = chip->pdata->patterns + (mode - 1); | |
359 | if (!ptn || _is_pc_overflow(ptn)) { | |
360 | dev_err(&chip->cl->dev, "invalid pattern data\n"); | |
361 | return -EINVAL; | |
362 | } | |
363 | ||
364 | lp5562_stop_engine(chip); | |
365 | ||
366 | /* Set LED map as RGB */ | |
367 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB); | |
368 | ||
369 | /* Load engines */ | |
370 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
371 | chip->engine_idx = i; | |
372 | lp5562_load_engine(chip); | |
373 | } | |
374 | ||
375 | /* Clear program registers */ | |
376 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0); | |
377 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0); | |
378 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0); | |
379 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0); | |
380 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0); | |
381 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0); | |
382 | ||
383 | /* Program engines */ | |
384 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1, | |
385 | ptn->r, ptn->size_r); | |
386 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2, | |
387 | ptn->g, ptn->size_g); | |
388 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3, | |
389 | ptn->b, ptn->size_b); | |
390 | ||
391 | /* Run engines */ | |
392 | lp5562_run_engine(chip, true); | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static ssize_t lp5562_store_pattern(struct device *dev, | |
398 | struct device_attribute *attr, | |
399 | const char *buf, size_t len) | |
400 | { | |
401 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
402 | struct lp55xx_chip *chip = led->chip; | |
403 | struct lp55xx_predef_pattern *ptn = chip->pdata->patterns; | |
404 | int num_patterns = chip->pdata->num_patterns; | |
405 | unsigned long mode; | |
406 | int ret; | |
407 | ||
408 | ret = kstrtoul(buf, 0, &mode); | |
409 | if (ret) | |
410 | return ret; | |
411 | ||
412 | if (mode > num_patterns || !ptn) | |
413 | return -EINVAL; | |
414 | ||
415 | mutex_lock(&chip->lock); | |
416 | ret = lp5562_run_predef_led_pattern(chip, mode); | |
417 | mutex_unlock(&chip->lock); | |
418 | ||
419 | if (ret) | |
420 | return ret; | |
421 | ||
422 | return len; | |
423 | } | |
424 | ||
425 | static ssize_t lp5562_store_engine_mux(struct device *dev, | |
426 | struct device_attribute *attr, | |
427 | const char *buf, size_t len) | |
428 | { | |
429 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
430 | struct lp55xx_chip *chip = led->chip; | |
431 | u8 mask; | |
432 | u8 val; | |
433 | ||
434 | /* LED map | |
435 | * R ... Engine 1 (fixed) | |
436 | * G ... Engine 2 (fixed) | |
437 | * B ... Engine 3 (fixed) | |
438 | * W ... Engine 1 or 2 or 3 | |
439 | */ | |
440 | ||
441 | if (sysfs_streq(buf, "RGB")) { | |
442 | mask = LP5562_ENG_FOR_RGB_M; | |
443 | val = LP5562_ENG_SEL_RGB; | |
444 | } else if (sysfs_streq(buf, "W")) { | |
445 | enum lp55xx_engine_index idx = chip->engine_idx; | |
446 | ||
447 | mask = LP5562_ENG_FOR_W_M; | |
448 | switch (idx) { | |
449 | case LP55XX_ENGINE_1: | |
450 | val = LP5562_ENG1_FOR_W; | |
451 | break; | |
452 | case LP55XX_ENGINE_2: | |
453 | val = LP5562_ENG2_FOR_W; | |
454 | break; | |
455 | case LP55XX_ENGINE_3: | |
456 | val = LP5562_ENG3_FOR_W; | |
457 | break; | |
458 | default: | |
459 | return -EINVAL; | |
460 | } | |
461 | ||
462 | } else { | |
463 | dev_err(dev, "choose RGB or W\n"); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | mutex_lock(&chip->lock); | |
468 | lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val); | |
469 | mutex_unlock(&chip->lock); | |
470 | ||
471 | return len; | |
472 | } | |
473 | ||
474 | static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, lp5562_store_pattern); | |
475 | static DEVICE_ATTR(engine_mux, S_IWUSR, NULL, lp5562_store_engine_mux); | |
476 | ||
477 | static struct attribute *lp5562_attributes[] = { | |
478 | &dev_attr_led_pattern.attr, | |
479 | &dev_attr_engine_mux.attr, | |
480 | NULL, | |
481 | }; | |
482 | ||
483 | static const struct attribute_group lp5562_group = { | |
484 | .attrs = lp5562_attributes, | |
485 | }; | |
486 | ||
487 | /* Chip specific configurations */ | |
488 | static struct lp55xx_device_config lp5562_cfg = { | |
489 | .max_channel = LP5562_MAX_LEDS, | |
490 | .reset = { | |
491 | .addr = LP5562_REG_RESET, | |
492 | .val = LP5562_RESET, | |
493 | }, | |
494 | .enable = { | |
495 | .addr = LP5562_REG_ENABLE, | |
496 | .val = LP5562_ENABLE_DEFAULT, | |
497 | }, | |
498 | .post_init_device = lp5562_post_init_device, | |
499 | .set_led_current = lp5562_set_led_current, | |
500 | .brightness_work_fn = lp5562_led_brightness_work, | |
501 | .run_engine = lp5562_run_engine, | |
502 | .firmware_cb = lp5562_firmware_loaded, | |
503 | .dev_attr_group = &lp5562_group, | |
504 | }; | |
505 | ||
506 | static int lp5562_probe(struct i2c_client *client, | |
507 | const struct i2c_device_id *id) | |
508 | { | |
509 | int ret; | |
510 | struct lp55xx_chip *chip; | |
511 | struct lp55xx_led *led; | |
512 | struct lp55xx_platform_data *pdata = client->dev.platform_data; | |
513 | ||
514 | if (!pdata) { | |
515 | dev_err(&client->dev, "no platform data\n"); | |
516 | return -EINVAL; | |
517 | } | |
518 | ||
519 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); | |
520 | if (!chip) | |
521 | return -ENOMEM; | |
522 | ||
523 | led = devm_kzalloc(&client->dev, | |
524 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
525 | if (!led) | |
526 | return -ENOMEM; | |
527 | ||
528 | chip->cl = client; | |
529 | chip->pdata = pdata; | |
530 | chip->cfg = &lp5562_cfg; | |
531 | ||
532 | mutex_init(&chip->lock); | |
533 | ||
534 | i2c_set_clientdata(client, led); | |
535 | ||
536 | ret = lp55xx_init_device(chip); | |
537 | if (ret) | |
538 | goto err_init; | |
539 | ||
540 | ret = lp55xx_register_leds(led, chip); | |
541 | if (ret) | |
542 | goto err_register_leds; | |
543 | ||
544 | ret = lp55xx_register_sysfs(chip); | |
545 | if (ret) { | |
546 | dev_err(&client->dev, "registering sysfs failed\n"); | |
547 | goto err_register_sysfs; | |
548 | } | |
549 | ||
550 | return 0; | |
551 | ||
552 | err_register_sysfs: | |
553 | lp55xx_unregister_leds(led, chip); | |
554 | err_register_leds: | |
555 | lp55xx_deinit_device(chip); | |
556 | err_init: | |
557 | return ret; | |
558 | } | |
559 | ||
560 | static int lp5562_remove(struct i2c_client *client) | |
561 | { | |
562 | struct lp55xx_led *led = i2c_get_clientdata(client); | |
563 | struct lp55xx_chip *chip = led->chip; | |
564 | ||
565 | lp5562_stop_engine(chip); | |
566 | ||
567 | lp55xx_unregister_sysfs(chip); | |
568 | lp55xx_unregister_leds(led, chip); | |
569 | lp55xx_deinit_device(chip); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | static const struct i2c_device_id lp5562_id[] = { | |
575 | { "lp5562", 0 }, | |
576 | { } | |
577 | }; | |
578 | MODULE_DEVICE_TABLE(i2c, lp5562_id); | |
579 | ||
580 | static struct i2c_driver lp5562_driver = { | |
581 | .driver = { | |
582 | .name = "lp5562", | |
583 | }, | |
584 | .probe = lp5562_probe, | |
585 | .remove = lp5562_remove, | |
586 | .id_table = lp5562_id, | |
587 | }; | |
588 | ||
589 | module_i2c_driver(lp5562_driver); | |
590 | ||
591 | MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver"); | |
592 | MODULE_AUTHOR("Milo Kim"); | |
593 | MODULE_LICENSE("GPL"); |