1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * LP5562 LED driver |
4 | * |
5 | * Copyright (C) 2013 Texas Instruments |
6 | * |
7 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
8 | */ |
9 | |
10 | #include <linux/delay.h> |
11 | #include <linux/firmware.h> |
12 | #include <linux/i2c.h> |
13 | #include <linux/leds.h> |
14 | #include <linux/module.h> |
15 | #include <linux/mutex.h> |
16 | #include <linux/of.h> |
17 | #include <linux/platform_data/leds-lp55xx.h> |
18 | #include <linux/slab.h> |
19 | |
20 | #include "leds-lp55xx-common.h" |
21 | |
22 | #define LP5562_PROGRAM_LENGTH 32 |
23 | #define LP5562_MAX_LEDS 4 |
24 | |
25 | /* ENABLE Register 00h */ |
26 | #define LP5562_REG_ENABLE 0x00 |
27 | #define LP5562_EXEC_ENG1_M 0x30 |
28 | #define LP5562_EXEC_ENG2_M 0x0C |
29 | #define LP5562_EXEC_ENG3_M 0x03 |
30 | #define LP5562_EXEC_M 0x3F |
31 | #define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */ |
32 | #define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ |
33 | #define LP5562_EXEC_RUN 0x2A |
34 | #define LP5562_ENABLE_DEFAULT \ |
35 | (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM) |
36 | #define LP5562_ENABLE_RUN_PROGRAM \ |
37 | (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN) |
38 | |
39 | /* OPMODE Register 01h */ |
40 | #define LP5562_REG_OP_MODE 0x01 |
41 | #define LP5562_MODE_ENG1_M 0x30 |
42 | #define LP5562_MODE_ENG2_M 0x0C |
43 | #define LP5562_MODE_ENG3_M 0x03 |
44 | #define LP5562_LOAD_ENG1 0x10 |
45 | #define LP5562_LOAD_ENG2 0x04 |
46 | #define LP5562_LOAD_ENG3 0x01 |
47 | #define LP5562_RUN_ENG1 0x20 |
48 | #define LP5562_RUN_ENG2 0x08 |
49 | #define LP5562_RUN_ENG3 0x02 |
50 | #define LP5562_ENG1_IS_LOADING(mode) \ |
51 | ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1) |
52 | #define LP5562_ENG2_IS_LOADING(mode) \ |
53 | ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2) |
54 | #define LP5562_ENG3_IS_LOADING(mode) \ |
55 | ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3) |
56 | |
57 | /* BRIGHTNESS Registers */ |
58 | #define LP5562_REG_R_PWM 0x04 |
59 | #define LP5562_REG_G_PWM 0x03 |
60 | #define LP5562_REG_B_PWM 0x02 |
61 | #define LP5562_REG_W_PWM 0x0E |
62 | |
63 | /* CURRENT Registers */ |
64 | #define LP5562_REG_R_CURRENT 0x07 |
65 | #define LP5562_REG_G_CURRENT 0x06 |
66 | #define LP5562_REG_B_CURRENT 0x05 |
67 | #define LP5562_REG_W_CURRENT 0x0F |
68 | |
69 | /* CONFIG Register 08h */ |
70 | #define LP5562_REG_CONFIG 0x08 |
71 | #define LP5562_PWM_HF 0x40 |
72 | #define LP5562_PWRSAVE_EN 0x20 |
73 | #define LP5562_CLK_INT 0x01 /* Internal clock */ |
74 | #define LP5562_DEFAULT_CFG (LP5562_PWM_HF | LP5562_PWRSAVE_EN) |
75 | |
76 | /* RESET Register 0Dh */ |
77 | #define LP5562_REG_RESET 0x0D |
78 | #define LP5562_RESET 0xFF |
79 | |
80 | /* PROGRAM ENGINE Registers */ |
81 | #define LP5562_REG_PROG_MEM_ENG1 0x10 |
82 | #define LP5562_REG_PROG_MEM_ENG2 0x30 |
83 | #define LP5562_REG_PROG_MEM_ENG3 0x50 |
84 | |
85 | /* LEDMAP Register 70h */ |
86 | #define LP5562_REG_ENG_SEL 0x70 |
87 | #define LP5562_ENG_SEL_PWM 0 |
88 | #define LP5562_ENG_FOR_RGB_M 0x3F |
89 | #define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */ |
90 | #define LP5562_ENG_FOR_W_M 0xC0 |
91 | #define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */ |
92 | #define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */ |
93 | #define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */ |
94 | |
95 | /* Program Commands */ |
96 | #define LP5562_CMD_DISABLE 0x00 |
97 | #define LP5562_CMD_LOAD 0x15 |
98 | #define LP5562_CMD_RUN 0x2A |
99 | #define LP5562_CMD_DIRECT 0x3F |
100 | #define LP5562_PATTERN_OFF 0 |
101 | |
102 | static inline void lp5562_wait_opmode_done(void) |
103 | { |
104 | /* operation mode change needs to be longer than 153 us */ |
105 | usleep_range(min: 200, max: 300); |
106 | } |
107 | |
108 | static inline void lp5562_wait_enable_done(void) |
109 | { |
110 | /* it takes more 488 us to update ENABLE register */ |
111 | usleep_range(min: 500, max: 600); |
112 | } |
113 | |
114 | static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current) |
115 | { |
116 | static const u8 addr[] = { |
117 | LP5562_REG_R_CURRENT, |
118 | LP5562_REG_G_CURRENT, |
119 | LP5562_REG_B_CURRENT, |
120 | LP5562_REG_W_CURRENT, |
121 | }; |
122 | |
123 | led->led_current = led_current; |
124 | lp55xx_write(chip: led->chip, reg: addr[led->chan_nr], val: led_current); |
125 | } |
126 | |
127 | static void lp5562_load_engine(struct lp55xx_chip *chip) |
128 | { |
129 | enum lp55xx_engine_index idx = chip->engine_idx; |
130 | static const u8 mask[] = { |
131 | [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M, |
132 | [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M, |
133 | [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M, |
134 | }; |
135 | |
136 | static const u8 val[] = { |
137 | [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1, |
138 | [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2, |
139 | [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3, |
140 | }; |
141 | |
142 | lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask: mask[idx], val: val[idx]); |
143 | |
144 | lp5562_wait_opmode_done(); |
145 | } |
146 | |
147 | static void lp5562_stop_engine(struct lp55xx_chip *chip) |
148 | { |
149 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE); |
150 | lp5562_wait_opmode_done(); |
151 | } |
152 | |
153 | static void lp5562_run_engine(struct lp55xx_chip *chip, bool start) |
154 | { |
155 | int ret; |
156 | u8 mode; |
157 | u8 exec; |
158 | |
159 | /* stop engine */ |
160 | if (!start) { |
161 | lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT); |
162 | lp5562_wait_enable_done(); |
163 | lp5562_stop_engine(chip); |
164 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); |
165 | lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); |
166 | lp5562_wait_opmode_done(); |
167 | return; |
168 | } |
169 | |
170 | /* |
171 | * To run the engine, |
172 | * operation mode and enable register should updated at the same time |
173 | */ |
174 | |
175 | ret = lp55xx_read(chip, LP5562_REG_OP_MODE, val: &mode); |
176 | if (ret) |
177 | return; |
178 | |
179 | ret = lp55xx_read(chip, LP5562_REG_ENABLE, val: &exec); |
180 | if (ret) |
181 | return; |
182 | |
183 | /* change operation mode to RUN only when each engine is loading */ |
184 | if (LP5562_ENG1_IS_LOADING(mode)) { |
185 | mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1; |
186 | exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1; |
187 | } |
188 | |
189 | if (LP5562_ENG2_IS_LOADING(mode)) { |
190 | mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2; |
191 | exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2; |
192 | } |
193 | |
194 | if (LP5562_ENG3_IS_LOADING(mode)) { |
195 | mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3; |
196 | exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3; |
197 | } |
198 | |
199 | lp55xx_write(chip, LP5562_REG_OP_MODE, val: mode); |
200 | lp5562_wait_opmode_done(); |
201 | |
202 | lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, val: exec); |
203 | lp5562_wait_enable_done(); |
204 | } |
205 | |
206 | static int lp5562_update_firmware(struct lp55xx_chip *chip, |
207 | const u8 *data, size_t size) |
208 | { |
209 | enum lp55xx_engine_index idx = chip->engine_idx; |
210 | u8 pattern[LP5562_PROGRAM_LENGTH] = {0}; |
211 | static const u8 addr[] = { |
212 | [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1, |
213 | [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2, |
214 | [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3, |
215 | }; |
216 | unsigned cmd; |
217 | char c[3]; |
218 | int program_size; |
219 | int nrchars; |
220 | int offset = 0; |
221 | int ret; |
222 | int i; |
223 | |
224 | /* clear program memory before updating */ |
225 | for (i = 0; i < LP5562_PROGRAM_LENGTH; i++) |
226 | lp55xx_write(chip, reg: addr[idx] + i, val: 0); |
227 | |
228 | i = 0; |
229 | while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) { |
230 | /* separate sscanfs because length is working only for %s */ |
231 | ret = sscanf(data + offset, "%2s%n " , c, &nrchars); |
232 | if (ret != 1) |
233 | goto err; |
234 | |
235 | ret = sscanf(c, "%2x" , &cmd); |
236 | if (ret != 1) |
237 | goto err; |
238 | |
239 | pattern[i] = (u8)cmd; |
240 | offset += nrchars; |
241 | i++; |
242 | } |
243 | |
244 | /* Each instruction is 16bit long. Check that length is even */ |
245 | if (i % 2) |
246 | goto err; |
247 | |
248 | program_size = i; |
249 | for (i = 0; i < program_size; i++) |
250 | lp55xx_write(chip, reg: addr[idx] + i, val: pattern[i]); |
251 | |
252 | return 0; |
253 | |
254 | err: |
255 | dev_err(&chip->cl->dev, "wrong pattern format\n" ); |
256 | return -EINVAL; |
257 | } |
258 | |
259 | static void lp5562_firmware_loaded(struct lp55xx_chip *chip) |
260 | { |
261 | const struct firmware *fw = chip->fw; |
262 | |
263 | /* |
264 | * the firmware is encoded in ascii hex character, with 2 chars |
265 | * per byte |
266 | */ |
267 | if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) { |
268 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n" , |
269 | fw->size); |
270 | return; |
271 | } |
272 | |
273 | /* |
274 | * Program memory sequence |
275 | * 1) set engine mode to "LOAD" |
276 | * 2) write firmware data into program memory |
277 | */ |
278 | |
279 | lp5562_load_engine(chip); |
280 | lp5562_update_firmware(chip, data: fw->data, size: fw->size); |
281 | } |
282 | |
283 | static int lp5562_post_init_device(struct lp55xx_chip *chip) |
284 | { |
285 | int ret; |
286 | u8 cfg = LP5562_DEFAULT_CFG; |
287 | |
288 | /* Set all PWMs to direct control mode */ |
289 | ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT); |
290 | if (ret) |
291 | return ret; |
292 | |
293 | lp5562_wait_opmode_done(); |
294 | |
295 | /* Update configuration for the clock setting */ |
296 | if (!lp55xx_is_extclk_used(chip)) |
297 | cfg |= LP5562_CLK_INT; |
298 | |
299 | ret = lp55xx_write(chip, LP5562_REG_CONFIG, val: cfg); |
300 | if (ret) |
301 | return ret; |
302 | |
303 | /* Initialize all channels PWM to zero -> leds off */ |
304 | lp55xx_write(chip, LP5562_REG_R_PWM, val: 0); |
305 | lp55xx_write(chip, LP5562_REG_G_PWM, val: 0); |
306 | lp55xx_write(chip, LP5562_REG_B_PWM, val: 0); |
307 | lp55xx_write(chip, LP5562_REG_W_PWM, val: 0); |
308 | |
309 | /* Set LED map as register PWM by default */ |
310 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM); |
311 | |
312 | return 0; |
313 | } |
314 | |
315 | static int lp5562_led_brightness(struct lp55xx_led *led) |
316 | { |
317 | struct lp55xx_chip *chip = led->chip; |
318 | static const u8 addr[] = { |
319 | LP5562_REG_R_PWM, |
320 | LP5562_REG_G_PWM, |
321 | LP5562_REG_B_PWM, |
322 | LP5562_REG_W_PWM, |
323 | }; |
324 | int ret; |
325 | |
326 | mutex_lock(&chip->lock); |
327 | ret = lp55xx_write(chip, reg: addr[led->chan_nr], val: led->brightness); |
328 | mutex_unlock(lock: &chip->lock); |
329 | |
330 | return ret; |
331 | } |
332 | |
333 | static void lp5562_write_program_memory(struct lp55xx_chip *chip, |
334 | u8 base, const u8 *rgb, int size) |
335 | { |
336 | int i; |
337 | |
338 | if (!rgb || size <= 0) |
339 | return; |
340 | |
341 | for (i = 0; i < size; i++) |
342 | lp55xx_write(chip, reg: base + i, val: *(rgb + i)); |
343 | |
344 | lp55xx_write(chip, reg: base + i, val: 0); |
345 | lp55xx_write(chip, reg: base + i + 1, val: 0); |
346 | } |
347 | |
348 | /* check the size of program count */ |
349 | static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn) |
350 | { |
351 | return ptn->size_r >= LP5562_PROGRAM_LENGTH || |
352 | ptn->size_g >= LP5562_PROGRAM_LENGTH || |
353 | ptn->size_b >= LP5562_PROGRAM_LENGTH; |
354 | } |
355 | |
356 | static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode) |
357 | { |
358 | struct lp55xx_predef_pattern *ptn; |
359 | int i; |
360 | |
361 | if (mode == LP5562_PATTERN_OFF) { |
362 | lp5562_run_engine(chip, start: false); |
363 | return 0; |
364 | } |
365 | |
366 | ptn = chip->pdata->patterns + (mode - 1); |
367 | if (!ptn || _is_pc_overflow(ptn)) { |
368 | dev_err(&chip->cl->dev, "invalid pattern data\n" ); |
369 | return -EINVAL; |
370 | } |
371 | |
372 | lp5562_stop_engine(chip); |
373 | |
374 | /* Set LED map as RGB */ |
375 | lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB); |
376 | |
377 | /* Load engines */ |
378 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { |
379 | chip->engine_idx = i; |
380 | lp5562_load_engine(chip); |
381 | } |
382 | |
383 | /* Clear program registers */ |
384 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, val: 0); |
385 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, val: 0); |
386 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, val: 0); |
387 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, val: 0); |
388 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, val: 0); |
389 | lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, val: 0); |
390 | |
391 | /* Program engines */ |
392 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1, |
393 | rgb: ptn->r, size: ptn->size_r); |
394 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2, |
395 | rgb: ptn->g, size: ptn->size_g); |
396 | lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3, |
397 | rgb: ptn->b, size: ptn->size_b); |
398 | |
399 | /* Run engines */ |
400 | lp5562_run_engine(chip, start: true); |
401 | |
402 | return 0; |
403 | } |
404 | |
405 | static ssize_t lp5562_store_pattern(struct device *dev, |
406 | struct device_attribute *attr, |
407 | const char *buf, size_t len) |
408 | { |
409 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
410 | struct lp55xx_chip *chip = led->chip; |
411 | struct lp55xx_predef_pattern *ptn = chip->pdata->patterns; |
412 | int num_patterns = chip->pdata->num_patterns; |
413 | unsigned long mode; |
414 | int ret; |
415 | |
416 | ret = kstrtoul(s: buf, base: 0, res: &mode); |
417 | if (ret) |
418 | return ret; |
419 | |
420 | if (mode > num_patterns || !ptn) |
421 | return -EINVAL; |
422 | |
423 | mutex_lock(&chip->lock); |
424 | ret = lp5562_run_predef_led_pattern(chip, mode); |
425 | mutex_unlock(lock: &chip->lock); |
426 | |
427 | if (ret) |
428 | return ret; |
429 | |
430 | return len; |
431 | } |
432 | |
433 | static ssize_t lp5562_store_engine_mux(struct device *dev, |
434 | struct device_attribute *attr, |
435 | const char *buf, size_t len) |
436 | { |
437 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
438 | struct lp55xx_chip *chip = led->chip; |
439 | u8 mask; |
440 | u8 val; |
441 | |
442 | /* LED map |
443 | * R ... Engine 1 (fixed) |
444 | * G ... Engine 2 (fixed) |
445 | * B ... Engine 3 (fixed) |
446 | * W ... Engine 1 or 2 or 3 |
447 | */ |
448 | |
449 | if (sysfs_streq(s1: buf, s2: "RGB" )) { |
450 | mask = LP5562_ENG_FOR_RGB_M; |
451 | val = LP5562_ENG_SEL_RGB; |
452 | } else if (sysfs_streq(s1: buf, s2: "W" )) { |
453 | enum lp55xx_engine_index idx = chip->engine_idx; |
454 | |
455 | mask = LP5562_ENG_FOR_W_M; |
456 | switch (idx) { |
457 | case LP55XX_ENGINE_1: |
458 | val = LP5562_ENG1_FOR_W; |
459 | break; |
460 | case LP55XX_ENGINE_2: |
461 | val = LP5562_ENG2_FOR_W; |
462 | break; |
463 | case LP55XX_ENGINE_3: |
464 | val = LP5562_ENG3_FOR_W; |
465 | break; |
466 | default: |
467 | return -EINVAL; |
468 | } |
469 | |
470 | } else { |
471 | dev_err(dev, "choose RGB or W\n" ); |
472 | return -EINVAL; |
473 | } |
474 | |
475 | mutex_lock(&chip->lock); |
476 | lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val); |
477 | mutex_unlock(lock: &chip->lock); |
478 | |
479 | return len; |
480 | } |
481 | |
482 | static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern); |
483 | static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux); |
484 | |
485 | static struct attribute *lp5562_attributes[] = { |
486 | &dev_attr_led_pattern.attr, |
487 | &dev_attr_engine_mux.attr, |
488 | NULL, |
489 | }; |
490 | |
491 | static const struct attribute_group lp5562_group = { |
492 | .attrs = lp5562_attributes, |
493 | }; |
494 | |
495 | /* Chip specific configurations */ |
496 | static struct lp55xx_device_config lp5562_cfg = { |
497 | .max_channel = LP5562_MAX_LEDS, |
498 | .reset = { |
499 | .addr = LP5562_REG_RESET, |
500 | .val = LP5562_RESET, |
501 | }, |
502 | .enable = { |
503 | .addr = LP5562_REG_ENABLE, |
504 | .val = LP5562_ENABLE_DEFAULT, |
505 | }, |
506 | .post_init_device = lp5562_post_init_device, |
507 | .set_led_current = lp5562_set_led_current, |
508 | .brightness_fn = lp5562_led_brightness, |
509 | .run_engine = lp5562_run_engine, |
510 | .firmware_cb = lp5562_firmware_loaded, |
511 | .dev_attr_group = &lp5562_group, |
512 | }; |
513 | |
514 | static int lp5562_probe(struct i2c_client *client) |
515 | { |
516 | int ret; |
517 | struct lp55xx_chip *chip; |
518 | struct lp55xx_led *led; |
519 | struct lp55xx_platform_data *pdata = dev_get_platdata(dev: &client->dev); |
520 | struct device_node *np = dev_of_node(dev: &client->dev); |
521 | |
522 | chip = devm_kzalloc(dev: &client->dev, size: sizeof(*chip), GFP_KERNEL); |
523 | if (!chip) |
524 | return -ENOMEM; |
525 | |
526 | chip->cfg = &lp5562_cfg; |
527 | |
528 | if (!pdata) { |
529 | if (np) { |
530 | pdata = lp55xx_of_populate_pdata(dev: &client->dev, np, |
531 | chip); |
532 | if (IS_ERR(ptr: pdata)) |
533 | return PTR_ERR(ptr: pdata); |
534 | } else { |
535 | dev_err(&client->dev, "no platform data\n" ); |
536 | return -EINVAL; |
537 | } |
538 | } |
539 | |
540 | |
541 | led = devm_kcalloc(dev: &client->dev, |
542 | n: pdata->num_channels, size: sizeof(*led), GFP_KERNEL); |
543 | if (!led) |
544 | return -ENOMEM; |
545 | |
546 | chip->cl = client; |
547 | chip->pdata = pdata; |
548 | |
549 | mutex_init(&chip->lock); |
550 | |
551 | i2c_set_clientdata(client, data: led); |
552 | |
553 | ret = lp55xx_init_device(chip); |
554 | if (ret) |
555 | goto err_init; |
556 | |
557 | ret = lp55xx_register_leds(led, chip); |
558 | if (ret) |
559 | goto err_out; |
560 | |
561 | ret = lp55xx_register_sysfs(chip); |
562 | if (ret) { |
563 | dev_err(&client->dev, "registering sysfs failed\n" ); |
564 | goto err_out; |
565 | } |
566 | |
567 | return 0; |
568 | |
569 | err_out: |
570 | lp55xx_deinit_device(chip); |
571 | err_init: |
572 | return ret; |
573 | } |
574 | |
575 | static void lp5562_remove(struct i2c_client *client) |
576 | { |
577 | struct lp55xx_led *led = i2c_get_clientdata(client); |
578 | struct lp55xx_chip *chip = led->chip; |
579 | |
580 | lp5562_stop_engine(chip); |
581 | |
582 | lp55xx_unregister_sysfs(chip); |
583 | lp55xx_deinit_device(chip); |
584 | } |
585 | |
586 | static const struct i2c_device_id lp5562_id[] = { |
587 | { "lp5562" , 0 }, |
588 | { } |
589 | }; |
590 | MODULE_DEVICE_TABLE(i2c, lp5562_id); |
591 | |
592 | static const struct of_device_id of_lp5562_leds_match[] = { |
593 | { .compatible = "ti,lp5562" , }, |
594 | {}, |
595 | }; |
596 | |
597 | MODULE_DEVICE_TABLE(of, of_lp5562_leds_match); |
598 | |
599 | static struct i2c_driver lp5562_driver = { |
600 | .driver = { |
601 | .name = "lp5562" , |
602 | .of_match_table = of_lp5562_leds_match, |
603 | }, |
604 | .probe = lp5562_probe, |
605 | .remove = lp5562_remove, |
606 | .id_table = lp5562_id, |
607 | }; |
608 | |
609 | module_i2c_driver(lp5562_driver); |
610 | |
611 | MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver" ); |
612 | MODULE_AUTHOR("Milo Kim" ); |
613 | MODULE_LICENSE("GPL" ); |
614 | |