Commit | Line | Data |
---|---|---|
500fe141 SO |
1 | /* |
2 | * LP5521 LED chip driver. | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/mutex.h> | |
27 | #include <linux/gpio.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/ctype.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/wait.h> | |
33 | #include <linux/leds.h> | |
34 | #include <linux/leds-lp5521.h> | |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/slab.h> | |
6a0c9a47 | 37 | #include <linux/platform_data/leds-lp55xx.h> |
9ce7cb17 | 38 | #include <linux/firmware.h> |
6a0c9a47 MWK |
39 | |
40 | #include "leds-lp55xx-common.h" | |
500fe141 SO |
41 | |
42 | #define LP5521_PROGRAM_LENGTH 32 /* in bytes */ | |
43 | ||
44 | #define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */ | |
45 | #define LP5521_MAX_ENGINES 3 /* Maximum number of engines */ | |
46 | ||
47 | #define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */ | |
48 | #define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */ | |
49 | ||
50 | #define LP5521_CMD_LOAD 0x15 /* 00010101 */ | |
51 | #define LP5521_CMD_RUN 0x2a /* 00101010 */ | |
52 | #define LP5521_CMD_DIRECT 0x3f /* 00111111 */ | |
53 | #define LP5521_CMD_DISABLED 0x00 /* 00000000 */ | |
54 | ||
55 | /* Registers */ | |
56 | #define LP5521_REG_ENABLE 0x00 | |
57 | #define LP5521_REG_OP_MODE 0x01 | |
58 | #define LP5521_REG_R_PWM 0x02 | |
59 | #define LP5521_REG_G_PWM 0x03 | |
60 | #define LP5521_REG_B_PWM 0x04 | |
61 | #define LP5521_REG_R_CURRENT 0x05 | |
62 | #define LP5521_REG_G_CURRENT 0x06 | |
63 | #define LP5521_REG_B_CURRENT 0x07 | |
64 | #define LP5521_REG_CONFIG 0x08 | |
65 | #define LP5521_REG_R_CHANNEL_PC 0x09 | |
66 | #define LP5521_REG_G_CHANNEL_PC 0x0A | |
67 | #define LP5521_REG_B_CHANNEL_PC 0x0B | |
68 | #define LP5521_REG_STATUS 0x0C | |
69 | #define LP5521_REG_RESET 0x0D | |
70 | #define LP5521_REG_GPO 0x0E | |
71 | #define LP5521_REG_R_PROG_MEM 0x10 | |
72 | #define LP5521_REG_G_PROG_MEM 0x30 | |
73 | #define LP5521_REG_B_PROG_MEM 0x50 | |
74 | ||
75 | #define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM | |
76 | #define LP5521_PROG_MEM_SIZE 0x20 | |
77 | ||
78 | /* Base register to set LED current */ | |
79 | #define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT | |
80 | ||
81 | /* Base register to set the brightness */ | |
82 | #define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM | |
83 | ||
84 | /* Bits in ENABLE register */ | |
85 | #define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ | |
86 | #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ | |
87 | #define LP5521_EXEC_RUN 0x2A | |
32a2f747 KM |
88 | #define LP5521_ENABLE_DEFAULT \ |
89 | (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM) | |
90 | #define LP5521_ENABLE_RUN_PROGRAM \ | |
91 | (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN) | |
500fe141 | 92 | |
500fe141 SO |
93 | /* Status */ |
94 | #define LP5521_EXT_CLK_USED 0x08 | |
95 | ||
b3c49c05 SK |
96 | /* default R channel current register value */ |
97 | #define LP5521_REG_R_CURR_DEFAULT 0xAF | |
98 | ||
011af7bc KM |
99 | /* Pattern Mode */ |
100 | #define PATTERN_OFF 0 | |
101 | ||
48068d5d MWK |
102 | /* Reset register value */ |
103 | #define LP5521_RESET 0xFF | |
104 | ||
9ce7cb17 MWK |
105 | /* Program Memory Operations */ |
106 | #define LP5521_MODE_R_M 0x30 /* Operation Mode Register */ | |
107 | #define LP5521_MODE_G_M 0x0C | |
108 | #define LP5521_MODE_B_M 0x03 | |
109 | #define LP5521_LOAD_R 0x10 | |
110 | #define LP5521_LOAD_G 0x04 | |
111 | #define LP5521_LOAD_B 0x01 | |
112 | ||
113 | #define LP5521_R_IS_LOADING(mode) \ | |
114 | ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R) | |
115 | #define LP5521_G_IS_LOADING(mode) \ | |
116 | ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G) | |
117 | #define LP5521_B_IS_LOADING(mode) \ | |
118 | ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B) | |
119 | ||
120 | #define LP5521_EXEC_R_M 0x30 /* Enable Register */ | |
121 | #define LP5521_EXEC_G_M 0x0C | |
122 | #define LP5521_EXEC_B_M 0x03 | |
123 | #define LP5521_EXEC_M 0x3F | |
124 | #define LP5521_RUN_R 0x20 | |
125 | #define LP5521_RUN_G 0x08 | |
126 | #define LP5521_RUN_B 0x02 | |
500fe141 | 127 | |
9ce7cb17 MWK |
128 | static inline void lp5521_wait_opmode_done(void) |
129 | { | |
130 | /* operation mode change needs to be longer than 153 us */ | |
131 | usleep_range(200, 300); | |
132 | } | |
133 | ||
94482174 MWK |
134 | static inline void lp5521_wait_enable_done(void) |
135 | { | |
136 | /* it takes more 488 us to update ENABLE register */ | |
137 | usleep_range(500, 600); | |
138 | } | |
139 | ||
a96bfa13 MWK |
140 | static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current) |
141 | { | |
142 | led->led_current = led_current; | |
143 | lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr, | |
144 | led_current); | |
145 | } | |
146 | ||
9ce7cb17 | 147 | static void lp5521_load_engine(struct lp55xx_chip *chip) |
500fe141 | 148 | { |
9ce7cb17 MWK |
149 | enum lp55xx_engine_index idx = chip->engine_idx; |
150 | u8 mask[] = { | |
151 | [LP55XX_ENGINE_1] = LP5521_MODE_R_M, | |
152 | [LP55XX_ENGINE_2] = LP5521_MODE_G_M, | |
153 | [LP55XX_ENGINE_3] = LP5521_MODE_B_M, | |
154 | }; | |
500fe141 | 155 | |
9ce7cb17 MWK |
156 | u8 val[] = { |
157 | [LP55XX_ENGINE_1] = LP5521_LOAD_R, | |
158 | [LP55XX_ENGINE_2] = LP5521_LOAD_G, | |
159 | [LP55XX_ENGINE_3] = LP5521_LOAD_B, | |
160 | }; | |
500fe141 | 161 | |
9ce7cb17 | 162 | lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]); |
500fe141 | 163 | |
9ce7cb17 MWK |
164 | lp5521_wait_opmode_done(); |
165 | } | |
500fe141 | 166 | |
9ce7cb17 MWK |
167 | static void lp5521_stop_engine(struct lp55xx_chip *chip) |
168 | { | |
169 | lp55xx_write(chip, LP5521_REG_OP_MODE, 0); | |
170 | lp5521_wait_opmode_done(); | |
500fe141 SO |
171 | } |
172 | ||
9ce7cb17 | 173 | static void lp5521_run_engine(struct lp55xx_chip *chip, bool start) |
500fe141 | 174 | { |
500fe141 | 175 | int ret; |
500fe141 | 176 | u8 mode; |
9ce7cb17 | 177 | u8 exec; |
500fe141 | 178 | |
9ce7cb17 MWK |
179 | /* stop engine */ |
180 | if (!start) { | |
181 | lp5521_stop_engine(chip); | |
182 | lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); | |
183 | lp5521_wait_opmode_done(); | |
184 | return; | |
185 | } | |
186 | ||
187 | /* | |
188 | * To run the engine, | |
189 | * operation mode and enable register should updated at the same time | |
190 | */ | |
191 | ||
192 | ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode); | |
5bc9ad77 | 193 | if (ret) |
9ce7cb17 | 194 | return; |
5bc9ad77 | 195 | |
9ce7cb17 | 196 | ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec); |
5bc9ad77 | 197 | if (ret) |
9ce7cb17 MWK |
198 | return; |
199 | ||
200 | /* change operation mode to RUN only when each engine is loading */ | |
201 | if (LP5521_R_IS_LOADING(mode)) { | |
202 | mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R; | |
203 | exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R; | |
204 | } | |
205 | ||
206 | if (LP5521_G_IS_LOADING(mode)) { | |
207 | mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G; | |
208 | exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G; | |
209 | } | |
210 | ||
211 | if (LP5521_B_IS_LOADING(mode)) { | |
212 | mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B; | |
213 | exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B; | |
214 | } | |
215 | ||
216 | lp55xx_write(chip, LP5521_REG_OP_MODE, mode); | |
217 | lp5521_wait_opmode_done(); | |
218 | ||
219 | lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec); | |
220 | lp5521_wait_enable_done(); | |
221 | } | |
222 | ||
223 | static int lp5521_update_program_memory(struct lp55xx_chip *chip, | |
224 | const u8 *data, size_t size) | |
225 | { | |
226 | enum lp55xx_engine_index idx = chip->engine_idx; | |
227 | u8 pattern[LP5521_PROGRAM_LENGTH] = {0}; | |
228 | u8 addr[] = { | |
229 | [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM, | |
230 | [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM, | |
231 | [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM, | |
232 | }; | |
233 | unsigned cmd; | |
234 | char c[3]; | |
235 | int program_size; | |
236 | int nrchars; | |
237 | int offset = 0; | |
238 | int ret; | |
239 | int i; | |
240 | ||
241 | /* clear program memory before updating */ | |
242 | for (i = 0; i < LP5521_PROGRAM_LENGTH; i++) | |
243 | lp55xx_write(chip, addr[idx] + i, 0); | |
244 | ||
245 | i = 0; | |
246 | while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) { | |
247 | /* separate sscanfs because length is working only for %s */ | |
248 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
249 | if (ret != 1) | |
250 | goto err; | |
251 | ||
252 | ret = sscanf(c, "%2x", &cmd); | |
253 | if (ret != 1) | |
254 | goto err; | |
255 | ||
256 | pattern[i] = (u8)cmd; | |
257 | offset += nrchars; | |
258 | i++; | |
259 | } | |
260 | ||
261 | /* Each instruction is 16bit long. Check that length is even */ | |
262 | if (i % 2) | |
263 | goto err; | |
264 | ||
265 | program_size = i; | |
266 | for (i = 0; i < program_size; i++) | |
267 | lp55xx_write(chip, addr[idx] + i, pattern[i]); | |
268 | ||
269 | return 0; | |
270 | ||
271 | err: | |
272 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | static void lp5521_firmware_loaded(struct lp55xx_chip *chip) | |
277 | { | |
278 | const struct firmware *fw = chip->fw; | |
279 | ||
280 | if (fw->size > LP5521_PROGRAM_LENGTH) { | |
281 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
282 | fw->size); | |
283 | return; | |
284 | } | |
500fe141 | 285 | |
9ce7cb17 MWK |
286 | /* |
287 | * Program momery sequence | |
288 | * 1) set engine mode to "LOAD" | |
289 | * 2) write firmware data into program memory | |
290 | */ | |
291 | ||
292 | lp5521_load_engine(chip); | |
293 | lp5521_update_program_memory(chip, fw->data, fw->size); | |
500fe141 SO |
294 | } |
295 | ||
ffbdccdb | 296 | static int lp5521_post_init_device(struct lp55xx_chip *chip) |
500fe141 | 297 | { |
500fe141 | 298 | int ret; |
94482174 | 299 | u8 val; |
500fe141 | 300 | |
94482174 MWK |
301 | /* |
302 | * Make sure that the chip is reset by reading back the r channel | |
303 | * current reg. This is dummy read is required on some platforms - | |
304 | * otherwise further access to the R G B channels in the | |
305 | * LP5521_REG_ENABLE register will not have any effect - strange! | |
306 | */ | |
ffbdccdb | 307 | ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val); |
94482174 | 308 | if (ret) { |
ffbdccdb | 309 | dev_err(&chip->cl->dev, "error in resetting chip\n"); |
94482174 MWK |
310 | return ret; |
311 | } | |
312 | if (val != LP5521_REG_R_CURR_DEFAULT) { | |
ffbdccdb | 313 | dev_err(&chip->cl->dev, |
94482174 MWK |
314 | "unexpected data in register (expected 0x%x got 0x%x)\n", |
315 | LP5521_REG_R_CURR_DEFAULT, val); | |
316 | ret = -EINVAL; | |
317 | return ret; | |
318 | } | |
319 | usleep_range(10000, 20000); | |
500fe141 | 320 | |
500fe141 | 321 | /* Set all PWMs to direct control mode */ |
ffbdccdb | 322 | ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); |
500fe141 | 323 | |
ffbdccdb | 324 | val = chip->pdata->update_config ? |
3b49aacd | 325 | : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); |
ffbdccdb | 326 | ret = lp55xx_write(chip, LP5521_REG_CONFIG, val); |
94482174 MWK |
327 | if (ret) |
328 | return ret; | |
500fe141 SO |
329 | |
330 | /* Initialize all channels PWM to zero -> leds off */ | |
ffbdccdb MWK |
331 | lp55xx_write(chip, LP5521_REG_R_PWM, 0); |
332 | lp55xx_write(chip, LP5521_REG_G_PWM, 0); | |
333 | lp55xx_write(chip, LP5521_REG_B_PWM, 0); | |
500fe141 SO |
334 | |
335 | /* Set engines are set to run state when OP_MODE enables engines */ | |
ffbdccdb | 336 | ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); |
94482174 MWK |
337 | if (ret) |
338 | return ret; | |
500fe141 | 339 | |
94482174 MWK |
340 | lp5521_wait_enable_done(); |
341 | ||
342 | return 0; | |
500fe141 SO |
343 | } |
344 | ||
9ca3bd80 | 345 | static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf) |
500fe141 | 346 | { |
9ca3bd80 | 347 | struct lp55xx_platform_data *pdata = chip->pdata; |
500fe141 SO |
348 | int ret; |
349 | u8 status; | |
350 | ||
9ca3bd80 | 351 | ret = lp55xx_read(chip, LP5521_REG_STATUS, &status); |
500fe141 SO |
352 | if (ret < 0) |
353 | return ret; | |
354 | ||
9ca3bd80 MWK |
355 | if (pdata->clock_mode != LP55XX_CLOCK_EXT) |
356 | return 0; | |
357 | ||
500fe141 | 358 | /* Check that ext clock is really in use if requested */ |
9ca3bd80 MWK |
359 | if ((status & LP5521_EXT_CLK_USED) == 0) |
360 | return -EIO; | |
361 | ||
500fe141 SO |
362 | return 0; |
363 | } | |
364 | ||
500fe141 SO |
365 | static void lp5521_led_brightness_work(struct work_struct *work) |
366 | { | |
a6e4679a | 367 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
500fe141 | 368 | brightness_work); |
a6e4679a | 369 | struct lp55xx_chip *chip = led->chip; |
500fe141 SO |
370 | |
371 | mutex_lock(&chip->lock); | |
a6e4679a | 372 | lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr, |
500fe141 SO |
373 | led->brightness); |
374 | mutex_unlock(&chip->lock); | |
375 | } | |
376 | ||
500fe141 SO |
377 | static ssize_t lp5521_selftest(struct device *dev, |
378 | struct device_attribute *attr, | |
379 | char *buf) | |
380 | { | |
9ca3bd80 MWK |
381 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
382 | struct lp55xx_chip *chip = led->chip; | |
500fe141 SO |
383 | int ret; |
384 | ||
385 | mutex_lock(&chip->lock); | |
386 | ret = lp5521_run_selftest(chip, buf); | |
387 | mutex_unlock(&chip->lock); | |
388 | return sprintf(buf, "%s\n", ret ? "FAIL" : "OK"); | |
389 | } | |
390 | ||
500fe141 | 391 | /* device attributes */ |
500fe141 SO |
392 | static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL); |
393 | ||
394 | static struct attribute *lp5521_attributes[] = { | |
500fe141 | 395 | &dev_attr_selftest.attr, |
500fe141 SO |
396 | NULL |
397 | }; | |
398 | ||
399 | static const struct attribute_group lp5521_group = { | |
400 | .attrs = lp5521_attributes, | |
401 | }; | |
402 | ||
48068d5d MWK |
403 | /* Chip specific configurations */ |
404 | static struct lp55xx_device_config lp5521_cfg = { | |
405 | .reset = { | |
406 | .addr = LP5521_REG_RESET, | |
407 | .val = LP5521_RESET, | |
408 | }, | |
e3a700d8 MWK |
409 | .enable = { |
410 | .addr = LP5521_REG_ENABLE, | |
411 | .val = LP5521_ENABLE_DEFAULT, | |
412 | }, | |
0e202346 | 413 | .max_channel = LP5521_MAX_LEDS, |
ffbdccdb | 414 | .post_init_device = lp5521_post_init_device, |
a6e4679a | 415 | .brightness_work_fn = lp5521_led_brightness_work, |
a96bfa13 | 416 | .set_led_current = lp5521_set_led_current, |
9ce7cb17 MWK |
417 | .firmware_cb = lp5521_firmware_loaded, |
418 | .run_engine = lp5521_run_engine, | |
e73c0ce6 | 419 | .dev_attr_group = &lp5521_group, |
48068d5d MWK |
420 | }; |
421 | ||
98ea1ea2 | 422 | static int lp5521_probe(struct i2c_client *client, |
500fe141 SO |
423 | const struct i2c_device_id *id) |
424 | { | |
1904f83d | 425 | int ret; |
6a0c9a47 MWK |
426 | struct lp55xx_chip *chip; |
427 | struct lp55xx_led *led; | |
428 | struct lp55xx_platform_data *pdata = client->dev.platform_data; | |
500fe141 | 429 | |
6a0c9a47 | 430 | if (!pdata) { |
500fe141 | 431 | dev_err(&client->dev, "no platform data\n"); |
e430dc00 | 432 | return -EINVAL; |
500fe141 SO |
433 | } |
434 | ||
6a0c9a47 MWK |
435 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
436 | if (!chip) | |
437 | return -ENOMEM; | |
438 | ||
439 | led = devm_kzalloc(&client->dev, | |
440 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
441 | if (!led) | |
442 | return -ENOMEM; | |
443 | ||
444 | chip->cl = client; | |
445 | chip->pdata = pdata; | |
48068d5d | 446 | chip->cfg = &lp5521_cfg; |
6a0c9a47 MWK |
447 | |
448 | mutex_init(&chip->lock); | |
500fe141 | 449 | |
6a0c9a47 | 450 | i2c_set_clientdata(client, led); |
500fe141 | 451 | |
22ebeb48 | 452 | ret = lp55xx_init_device(chip); |
944f7b1d | 453 | if (ret) |
f6c64c6f | 454 | goto err_init; |
500fe141 SO |
455 | |
456 | dev_info(&client->dev, "%s programmable led chip found\n", id->name); | |
457 | ||
9e9b3db1 | 458 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 459 | if (ret) |
9e9b3db1 | 460 | goto err_register_leds; |
500fe141 | 461 | |
e73c0ce6 | 462 | ret = lp55xx_register_sysfs(chip); |
500fe141 SO |
463 | if (ret) { |
464 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 465 | goto err_register_sysfs; |
500fe141 | 466 | } |
e73c0ce6 MWK |
467 | |
468 | return 0; | |
469 | ||
470 | err_register_sysfs: | |
c3a68ebf | 471 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 472 | err_register_leds: |
6ce61762 | 473 | lp55xx_deinit_device(chip); |
f6c64c6f | 474 | err_init: |
500fe141 SO |
475 | return ret; |
476 | } | |
477 | ||
678e8a6b | 478 | static int lp5521_remove(struct i2c_client *client) |
500fe141 | 479 | { |
6ce61762 MWK |
480 | struct lp55xx_led *led = i2c_get_clientdata(client); |
481 | struct lp55xx_chip *chip = led->chip; | |
500fe141 | 482 | |
87cc4bde MWK |
483 | lp5521_stop_engine(chip); |
484 | lp55xx_unregister_sysfs(chip); | |
c3a68ebf | 485 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 486 | lp55xx_deinit_device(chip); |
500fe141 | 487 | |
500fe141 SO |
488 | return 0; |
489 | } | |
490 | ||
491 | static const struct i2c_device_id lp5521_id[] = { | |
492 | { "lp5521", 0 }, /* Three channel chip */ | |
493 | { } | |
494 | }; | |
495 | MODULE_DEVICE_TABLE(i2c, lp5521_id); | |
496 | ||
497 | static struct i2c_driver lp5521_driver = { | |
498 | .driver = { | |
499 | .name = "lp5521", | |
500 | }, | |
501 | .probe = lp5521_probe, | |
df07cf81 | 502 | .remove = lp5521_remove, |
500fe141 SO |
503 | .id_table = lp5521_id, |
504 | }; | |
505 | ||
09a0d183 | 506 | module_i2c_driver(lp5521_driver); |
500fe141 SO |
507 | |
508 | MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo"); | |
509 | MODULE_DESCRIPTION("LP5521 LED engine"); | |
510 | MODULE_LICENSE("GPL v2"); |