Commit | Line | Data |
---|---|---|
0efba16c SO |
1 | /* |
2 | * lp5523.c - LP5523 LED Driver | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
a2387cb9 | 5 | * Copyright (C) 2012 Texas Instruments |
0efba16c SO |
6 | * |
7 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
a2387cb9 | 8 | * Milo(Woogyom) Kim <milo.kim@ti.com> |
0efba16c SO |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * version 2 as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
22 | * 02110-1301 USA | |
23 | */ | |
24 | ||
0efba16c | 25 | #include <linux/delay.h> |
79bcc10b MWK |
26 | #include <linux/firmware.h> |
27 | #include <linux/i2c.h> | |
28 | #include <linux/init.h> | |
0efba16c | 29 | #include <linux/leds.h> |
79bcc10b MWK |
30 | #include <linux/module.h> |
31 | #include <linux/mutex.h> | |
6a0c9a47 | 32 | #include <linux/platform_data/leds-lp55xx.h> |
79bcc10b | 33 | #include <linux/slab.h> |
6a0c9a47 MWK |
34 | |
35 | #include "leds-lp55xx-common.h" | |
0efba16c | 36 | |
12f022d2 MWK |
37 | #define LP5523_PROGRAM_LENGTH 32 |
38 | #define LP5523_MAX_LEDS 9 | |
39 | ||
40 | /* Registers */ | |
0efba16c SO |
41 | #define LP5523_REG_ENABLE 0x00 |
42 | #define LP5523_REG_OP_MODE 0x01 | |
0efba16c SO |
43 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
44 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 | |
0efba16c SO |
45 | #define LP5523_REG_LED_PWM_BASE 0x16 |
46 | #define LP5523_REG_LED_CURRENT_BASE 0x26 | |
47 | #define LP5523_REG_CONFIG 0x36 | |
12f022d2 MWK |
48 | #define LP5523_REG_STATUS 0x3A |
49 | #define LP5523_REG_RESET 0x3D | |
0efba16c SO |
50 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
51 | #define LP5523_REG_LED_TEST_ADC 0x42 | |
12f022d2 | 52 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
0efba16c SO |
53 | #define LP5523_REG_PROG_MEM 0x50 |
54 | ||
12f022d2 | 55 | /* Bit description in registers */ |
0efba16c SO |
56 | #define LP5523_ENABLE 0x40 |
57 | #define LP5523_AUTO_INC 0x40 | |
58 | #define LP5523_PWR_SAVE 0x20 | |
59 | #define LP5523_PWM_PWR_SAVE 0x04 | |
0efba16c | 60 | #define LP5523_CP_AUTO 0x18 |
0efba16c | 61 | #define LP5523_AUTO_CLK 0x02 |
12f022d2 | 62 | |
0efba16c SO |
63 | #define LP5523_EN_LEDTEST 0x80 |
64 | #define LP5523_LEDTEST_DONE 0x80 | |
48068d5d | 65 | #define LP5523_RESET 0xFF |
0efba16c | 66 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
0efba16c SO |
67 | #define LP5523_EXT_CLK_USED 0x08 |
68 | ||
db6eaf83 MWK |
69 | /* Memory Page Selection */ |
70 | #define LP5523_PAGE_ENG1 0 | |
71 | #define LP5523_PAGE_ENG2 1 | |
72 | #define LP5523_PAGE_ENG3 2 | |
73 | ||
74 | /* Program Memory Operations */ | |
75 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ | |
76 | #define LP5523_MODE_ENG2_M 0x0C | |
77 | #define LP5523_MODE_ENG3_M 0x03 | |
78 | #define LP5523_LOAD_ENG1 0x10 | |
79 | #define LP5523_LOAD_ENG2 0x04 | |
80 | #define LP5523_LOAD_ENG3 0x01 | |
81 | ||
82 | #define LP5523_ENG1_IS_LOADING(mode) \ | |
83 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) | |
84 | #define LP5523_ENG2_IS_LOADING(mode) \ | |
85 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) | |
86 | #define LP5523_ENG3_IS_LOADING(mode) \ | |
87 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) | |
88 | ||
89 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ | |
90 | #define LP5523_EXEC_ENG2_M 0x0C | |
91 | #define LP5523_EXEC_ENG3_M 0x03 | |
92 | #define LP5523_EXEC_M 0x3F | |
93 | #define LP5523_RUN_ENG1 0x20 | |
94 | #define LP5523_RUN_ENG2 0x08 | |
95 | #define LP5523_RUN_ENG3 0x02 | |
96 | ||
27d7704e KM |
97 | enum lp5523_chip_id { |
98 | LP5523, | |
99 | LP55231, | |
100 | }; | |
101 | ||
db6eaf83 MWK |
102 | static inline void lp5523_wait_opmode_done(void) |
103 | { | |
104 | usleep_range(1000, 2000); | |
105 | } | |
106 | ||
a96bfa13 MWK |
107 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
108 | { | |
109 | led->led_current = led_current; | |
110 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, | |
111 | led_current); | |
112 | } | |
113 | ||
ffbdccdb | 114 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
0efba16c | 115 | { |
ffbdccdb | 116 | int ret; |
0efba16c | 117 | |
ffbdccdb | 118 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
632418bf MWK |
119 | if (ret) |
120 | return ret; | |
0efba16c | 121 | |
2e4840ed SO |
122 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
123 | usleep_range(1000, 2000); | |
0efba16c | 124 | |
ffbdccdb | 125 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
0efba16c SO |
126 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
127 | LP5523_CP_AUTO | LP5523_AUTO_CLK | | |
128 | LP5523_PWM_PWR_SAVE); | |
632418bf MWK |
129 | if (ret) |
130 | return ret; | |
0efba16c SO |
131 | |
132 | /* turn on all leds */ | |
ffbdccdb | 133 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
632418bf | 134 | if (ret) |
1b21ec5a JH |
135 | return ret; |
136 | ||
ffbdccdb | 137 | return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
0efba16c SO |
138 | } |
139 | ||
db6eaf83 | 140 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
0efba16c | 141 | { |
db6eaf83 MWK |
142 | enum lp55xx_engine_index idx = chip->engine_idx; |
143 | u8 mask[] = { | |
144 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, | |
145 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
146 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
147 | }; | |
148 | ||
149 | u8 val[] = { | |
150 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, | |
151 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, | |
152 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, | |
153 | }; | |
154 | ||
155 | u8 page_sel[] = { | |
156 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, | |
157 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, | |
158 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, | |
159 | }; | |
160 | ||
161 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); | |
162 | ||
163 | lp5523_wait_opmode_done(); | |
164 | ||
165 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); | |
0efba16c SO |
166 | } |
167 | ||
db6eaf83 | 168 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
0efba16c | 169 | { |
db6eaf83 MWK |
170 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
171 | lp5523_wait_opmode_done(); | |
172 | } | |
0efba16c | 173 | |
db6eaf83 MWK |
174 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
175 | { | |
176 | int i; | |
0efba16c | 177 | |
db6eaf83 MWK |
178 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
179 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); | |
0efba16c SO |
180 | } |
181 | ||
db6eaf83 | 182 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
0efba16c | 183 | { |
db6eaf83 MWK |
184 | int ret; |
185 | u8 mode; | |
186 | u8 exec; | |
0efba16c | 187 | |
db6eaf83 MWK |
188 | /* stop engine */ |
189 | if (!start) { | |
190 | lp5523_stop_engine(chip); | |
191 | lp5523_turn_off_channels(chip); | |
192 | return; | |
193 | } | |
0efba16c | 194 | |
db6eaf83 MWK |
195 | /* |
196 | * To run the engine, | |
197 | * operation mode and enable register should updated at the same time | |
198 | */ | |
0efba16c | 199 | |
db6eaf83 MWK |
200 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
201 | if (ret) | |
202 | return; | |
0efba16c | 203 | |
db6eaf83 MWK |
204 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
205 | if (ret) | |
206 | return; | |
0efba16c | 207 | |
db6eaf83 MWK |
208 | /* change operation mode to RUN only when each engine is loading */ |
209 | if (LP5523_ENG1_IS_LOADING(mode)) { | |
210 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; | |
211 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; | |
212 | } | |
0efba16c | 213 | |
db6eaf83 MWK |
214 | if (LP5523_ENG2_IS_LOADING(mode)) { |
215 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; | |
216 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; | |
217 | } | |
0efba16c | 218 | |
db6eaf83 MWK |
219 | if (LP5523_ENG3_IS_LOADING(mode)) { |
220 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; | |
221 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; | |
222 | } | |
223 | ||
224 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); | |
225 | lp5523_wait_opmode_done(); | |
226 | ||
227 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); | |
0efba16c SO |
228 | } |
229 | ||
db6eaf83 MWK |
230 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
231 | const u8 *data, size_t size) | |
0efba16c | 232 | { |
db6eaf83 MWK |
233 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
234 | unsigned cmd; | |
235 | char c[3]; | |
236 | int update_size; | |
237 | int nrchars; | |
238 | int offset = 0; | |
239 | int ret; | |
0efba16c | 240 | int i; |
0efba16c | 241 | |
db6eaf83 MWK |
242 | /* clear program memory before updating */ |
243 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) | |
244 | lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0); | |
0efba16c | 245 | |
db6eaf83 MWK |
246 | i = 0; |
247 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { | |
248 | /* separate sscanfs because length is working only for %s */ | |
249 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
250 | if (ret != 1) | |
251 | goto err; | |
0efba16c | 252 | |
db6eaf83 MWK |
253 | ret = sscanf(c, "%2x", &cmd); |
254 | if (ret != 1) | |
255 | goto err; | |
0efba16c | 256 | |
db6eaf83 MWK |
257 | pattern[i] = (u8)cmd; |
258 | offset += nrchars; | |
259 | i++; | |
260 | } | |
0efba16c | 261 | |
db6eaf83 MWK |
262 | /* Each instruction is 16bit long. Check that length is even */ |
263 | if (i % 2) | |
264 | goto err; | |
0efba16c | 265 | |
db6eaf83 MWK |
266 | update_size = i; |
267 | for (i = 0; i < update_size; i++) | |
268 | lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); | |
0efba16c | 269 | |
db6eaf83 | 270 | return 0; |
0efba16c | 271 | |
db6eaf83 MWK |
272 | err: |
273 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
274 | return -EINVAL; | |
0efba16c | 275 | } |
0efba16c | 276 | |
db6eaf83 | 277 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
0efba16c | 278 | { |
db6eaf83 | 279 | const struct firmware *fw = chip->fw; |
fbac0812 | 280 | |
db6eaf83 MWK |
281 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
282 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
283 | fw->size); | |
284 | return; | |
285 | } | |
0efba16c | 286 | |
db6eaf83 MWK |
287 | /* |
288 | * Program momery sequence | |
289 | * 1) set engine mode to "LOAD" | |
290 | * 2) write firmware data into program memory | |
291 | */ | |
0efba16c | 292 | |
db6eaf83 MWK |
293 | lp5523_load_engine(chip); |
294 | lp5523_update_program_memory(chip, fw->data, fw->size); | |
0efba16c | 295 | } |
0efba16c SO |
296 | |
297 | static ssize_t lp5523_selftest(struct device *dev, | |
298 | struct device_attribute *attr, | |
299 | char *buf) | |
300 | { | |
9ca3bd80 MWK |
301 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
302 | struct lp55xx_chip *chip = led->chip; | |
303 | struct lp55xx_platform_data *pdata = chip->pdata; | |
0efba16c | 304 | int i, ret, pos = 0; |
0efba16c SO |
305 | u8 status, adc, vdd; |
306 | ||
307 | mutex_lock(&chip->lock); | |
308 | ||
9ca3bd80 | 309 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
0efba16c SO |
310 | if (ret < 0) |
311 | goto fail; | |
312 | ||
313 | /* Check that ext clock is really in use if requested */ | |
9ca3bd80 | 314 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
0efba16c SO |
315 | if ((status & LP5523_EXT_CLK_USED) == 0) |
316 | goto fail; | |
9ca3bd80 | 317 | } |
0efba16c SO |
318 | |
319 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ | |
9ca3bd80 | 320 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
2e4840ed | 321 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
9ca3bd80 | 322 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
323 | if (ret < 0) |
324 | goto fail; | |
325 | ||
0efba16c | 326 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 327 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
0efba16c | 328 | |
9ca3bd80 | 329 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
1b21ec5a JH |
330 | if (ret < 0) |
331 | goto fail; | |
332 | ||
0efba16c SO |
333 | vdd--; /* There may be some fluctuation in measurement */ |
334 | ||
0e202346 | 335 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
0efba16c | 336 | /* Skip non-existing channels */ |
9ca3bd80 | 337 | if (pdata->led_config[i].led_current == 0) |
0efba16c SO |
338 | continue; |
339 | ||
340 | /* Set default current */ | |
9ca3bd80 MWK |
341 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
342 | pdata->led_config[i].led_current); | |
0efba16c | 343 | |
9ca3bd80 | 344 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
2e4840ed SO |
345 | /* let current stabilize 2 - 4ms before measurements start */ |
346 | usleep_range(2000, 4000); | |
9ca3bd80 | 347 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
0efba16c | 348 | LP5523_EN_LEDTEST | i); |
2e4840ed SO |
349 | /* ADC conversion time is 2.7 ms typically */ |
350 | usleep_range(3000, 6000); | |
9ca3bd80 | 351 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
352 | if (ret < 0) |
353 | goto fail; | |
354 | ||
0efba16c | 355 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 356 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
9ca3bd80 MWK |
357 | |
358 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); | |
1b21ec5a JH |
359 | if (ret < 0) |
360 | goto fail; | |
0efba16c SO |
361 | |
362 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) | |
363 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); | |
364 | ||
9ca3bd80 | 365 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
0efba16c SO |
366 | |
367 | /* Restore current */ | |
9ca3bd80 MWK |
368 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
369 | led->led_current); | |
0efba16c SO |
370 | led++; |
371 | } | |
372 | if (pos == 0) | |
373 | pos = sprintf(buf, "OK\n"); | |
374 | goto release_lock; | |
375 | fail: | |
376 | pos = sprintf(buf, "FAIL\n"); | |
377 | ||
378 | release_lock: | |
379 | mutex_unlock(&chip->lock); | |
380 | ||
381 | return pos; | |
382 | } | |
383 | ||
0efba16c SO |
384 | static void lp5523_led_brightness_work(struct work_struct *work) |
385 | { | |
a6e4679a | 386 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
0efba16c | 387 | brightness_work); |
a6e4679a | 388 | struct lp55xx_chip *chip = led->chip; |
0efba16c SO |
389 | |
390 | mutex_lock(&chip->lock); | |
a6e4679a | 391 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
0efba16c | 392 | led->brightness); |
0efba16c SO |
393 | mutex_unlock(&chip->lock); |
394 | } | |
395 | ||
0efba16c SO |
396 | static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL); |
397 | ||
398 | static struct attribute *lp5523_attributes[] = { | |
0efba16c | 399 | &dev_attr_selftest.attr, |
f1625842 | 400 | NULL, |
0efba16c SO |
401 | }; |
402 | ||
403 | static const struct attribute_group lp5523_group = { | |
404 | .attrs = lp5523_attributes, | |
405 | }; | |
406 | ||
48068d5d MWK |
407 | /* Chip specific configurations */ |
408 | static struct lp55xx_device_config lp5523_cfg = { | |
409 | .reset = { | |
410 | .addr = LP5523_REG_RESET, | |
411 | .val = LP5523_RESET, | |
412 | }, | |
e3a700d8 MWK |
413 | .enable = { |
414 | .addr = LP5523_REG_ENABLE, | |
415 | .val = LP5523_ENABLE, | |
416 | }, | |
0e202346 | 417 | .max_channel = LP5523_MAX_LEDS, |
ffbdccdb | 418 | .post_init_device = lp5523_post_init_device, |
a6e4679a | 419 | .brightness_work_fn = lp5523_led_brightness_work, |
a96bfa13 | 420 | .set_led_current = lp5523_set_led_current, |
db6eaf83 MWK |
421 | .firmware_cb = lp5523_firmware_loaded, |
422 | .run_engine = lp5523_run_engine, | |
e73c0ce6 | 423 | .dev_attr_group = &lp5523_group, |
48068d5d MWK |
424 | }; |
425 | ||
98ea1ea2 | 426 | static int lp5523_probe(struct i2c_client *client, |
0efba16c SO |
427 | const struct i2c_device_id *id) |
428 | { | |
22ebeb48 | 429 | int ret; |
6a0c9a47 MWK |
430 | struct lp55xx_chip *chip; |
431 | struct lp55xx_led *led; | |
7542a04b LW |
432 | struct lp55xx_platform_data *pdata; |
433 | struct device_node *np = client->dev.of_node; | |
434 | ||
435 | if (!client->dev.platform_data) { | |
436 | if (np) { | |
437 | ret = lp55xx_of_populate_pdata(&client->dev, np); | |
438 | if (ret < 0) | |
439 | return ret; | |
440 | } else { | |
441 | dev_err(&client->dev, "no platform data\n"); | |
442 | return -EINVAL; | |
443 | } | |
0efba16c | 444 | } |
7542a04b | 445 | pdata = client->dev.platform_data; |
0efba16c | 446 | |
6a0c9a47 MWK |
447 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
448 | if (!chip) | |
449 | return -ENOMEM; | |
450 | ||
451 | led = devm_kzalloc(&client->dev, | |
452 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
453 | if (!led) | |
454 | return -ENOMEM; | |
455 | ||
456 | chip->cl = client; | |
457 | chip->pdata = pdata; | |
48068d5d | 458 | chip->cfg = &lp5523_cfg; |
6a0c9a47 MWK |
459 | |
460 | mutex_init(&chip->lock); | |
0efba16c | 461 | |
6a0c9a47 | 462 | i2c_set_clientdata(client, led); |
0efba16c | 463 | |
22ebeb48 | 464 | ret = lp55xx_init_device(chip); |
0efba16c | 465 | if (ret) |
f6c64c6f | 466 | goto err_init; |
0efba16c | 467 | |
56a1e9ad | 468 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
0efba16c | 469 | |
9e9b3db1 | 470 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 471 | if (ret) |
9e9b3db1 | 472 | goto err_register_leds; |
0efba16c | 473 | |
e73c0ce6 | 474 | ret = lp55xx_register_sysfs(chip); |
0efba16c SO |
475 | if (ret) { |
476 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 477 | goto err_register_sysfs; |
0efba16c | 478 | } |
e73c0ce6 MWK |
479 | |
480 | return 0; | |
481 | ||
482 | err_register_sysfs: | |
c3a68ebf | 483 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 484 | err_register_leds: |
6ce61762 | 485 | lp55xx_deinit_device(chip); |
f6c64c6f | 486 | err_init: |
0efba16c SO |
487 | return ret; |
488 | } | |
489 | ||
490 | static int lp5523_remove(struct i2c_client *client) | |
491 | { | |
6ce61762 MWK |
492 | struct lp55xx_led *led = i2c_get_clientdata(client); |
493 | struct lp55xx_chip *chip = led->chip; | |
0efba16c | 494 | |
87cc4bde MWK |
495 | lp5523_stop_engine(chip); |
496 | lp55xx_unregister_sysfs(chip); | |
c3a68ebf | 497 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 498 | lp55xx_deinit_device(chip); |
0efba16c | 499 | |
0efba16c SO |
500 | return 0; |
501 | } | |
502 | ||
503 | static const struct i2c_device_id lp5523_id[] = { | |
27d7704e KM |
504 | { "lp5523", LP5523 }, |
505 | { "lp55231", LP55231 }, | |
0efba16c SO |
506 | { } |
507 | }; | |
508 | ||
509 | MODULE_DEVICE_TABLE(i2c, lp5523_id); | |
510 | ||
33c88b67 AL |
511 | #ifdef CONFIG_OF |
512 | static const struct of_device_id of_lp5523_leds_match[] = { | |
513 | { .compatible = "national,lp5523", }, | |
514 | {}, | |
515 | }; | |
516 | ||
517 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); | |
518 | #endif | |
519 | ||
0efba16c SO |
520 | static struct i2c_driver lp5523_driver = { |
521 | .driver = { | |
27d7704e | 522 | .name = "lp5523x", |
33c88b67 | 523 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
0efba16c SO |
524 | }, |
525 | .probe = lp5523_probe, | |
526 | .remove = lp5523_remove, | |
527 | .id_table = lp5523_id, | |
528 | }; | |
529 | ||
09a0d183 | 530 | module_i2c_driver(lp5523_driver); |
0efba16c SO |
531 | |
532 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); | |
a2387cb9 | 533 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
0efba16c SO |
534 | MODULE_DESCRIPTION("LP5523 LED engine"); |
535 | MODULE_LICENSE("GPL"); |