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Commit | Line | Data |
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0efba16c | 1 | /* |
9ef8c877 | 2 | * lp5523.c - LP5523, LP55231 LED Driver |
0efba16c SO |
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> | |
0efba16c | 28 | #include <linux/leds.h> |
79bcc10b MWK |
29 | #include <linux/module.h> |
30 | #include <linux/mutex.h> | |
c68f46dd | 31 | #include <linux/of.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 | |
bfb18d82 PM |
37 | #define LP5523_PROGRAM_LENGTH 32 /* bytes */ |
38 | /* Memory is used like this: | |
39 | 0x00 engine 1 program | |
40 | 0x10 engine 2 program | |
41 | 0x20 engine 3 program | |
42 | 0x30 engine 1 muxing info | |
43 | 0x40 engine 2 muxing info | |
44 | 0x50 engine 3 muxing info | |
45 | */ | |
12f022d2 MWK |
46 | #define LP5523_MAX_LEDS 9 |
47 | ||
48 | /* Registers */ | |
0efba16c SO |
49 | #define LP5523_REG_ENABLE 0x00 |
50 | #define LP5523_REG_OP_MODE 0x01 | |
0efba16c SO |
51 | #define LP5523_REG_ENABLE_LEDS_MSB 0x04 |
52 | #define LP5523_REG_ENABLE_LEDS_LSB 0x05 | |
52da81ea | 53 | #define LP5523_REG_LED_CTRL_BASE 0x06 |
0efba16c SO |
54 | #define LP5523_REG_LED_PWM_BASE 0x16 |
55 | #define LP5523_REG_LED_CURRENT_BASE 0x26 | |
56 | #define LP5523_REG_CONFIG 0x36 | |
12f022d2 MWK |
57 | #define LP5523_REG_STATUS 0x3A |
58 | #define LP5523_REG_RESET 0x3D | |
0efba16c SO |
59 | #define LP5523_REG_LED_TEST_CTRL 0x41 |
60 | #define LP5523_REG_LED_TEST_ADC 0x42 | |
52da81ea | 61 | #define LP5523_REG_MASTER_FADER_BASE 0x48 |
22460438 MK |
62 | #define LP5523_REG_CH1_PROG_START 0x4C |
63 | #define LP5523_REG_CH2_PROG_START 0x4D | |
64 | #define LP5523_REG_CH3_PROG_START 0x4E | |
12f022d2 | 65 | #define LP5523_REG_PROG_PAGE_SEL 0x4F |
0efba16c SO |
66 | #define LP5523_REG_PROG_MEM 0x50 |
67 | ||
12f022d2 | 68 | /* Bit description in registers */ |
0efba16c SO |
69 | #define LP5523_ENABLE 0x40 |
70 | #define LP5523_AUTO_INC 0x40 | |
71 | #define LP5523_PWR_SAVE 0x20 | |
72 | #define LP5523_PWM_PWR_SAVE 0x04 | |
0efba16c | 73 | #define LP5523_CP_AUTO 0x18 |
0efba16c | 74 | #define LP5523_AUTO_CLK 0x02 |
12f022d2 | 75 | |
0efba16c SO |
76 | #define LP5523_EN_LEDTEST 0x80 |
77 | #define LP5523_LEDTEST_DONE 0x80 | |
48068d5d | 78 | #define LP5523_RESET 0xFF |
0efba16c | 79 | #define LP5523_ADC_SHORTCIRC_LIM 80 |
0efba16c | 80 | #define LP5523_EXT_CLK_USED 0x08 |
22460438 | 81 | #define LP5523_ENG_STATUS_MASK 0x07 |
0efba16c | 82 | |
52da81ea TK |
83 | #define LP5523_FADER_MAPPING_MASK 0xC0 |
84 | #define LP5523_FADER_MAPPING_SHIFT 6 | |
85 | ||
db6eaf83 MWK |
86 | /* Memory Page Selection */ |
87 | #define LP5523_PAGE_ENG1 0 | |
88 | #define LP5523_PAGE_ENG2 1 | |
89 | #define LP5523_PAGE_ENG3 2 | |
45e611bf MK |
90 | #define LP5523_PAGE_MUX1 3 |
91 | #define LP5523_PAGE_MUX2 4 | |
92 | #define LP5523_PAGE_MUX3 5 | |
db6eaf83 MWK |
93 | |
94 | /* Program Memory Operations */ | |
95 | #define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ | |
96 | #define LP5523_MODE_ENG2_M 0x0C | |
97 | #define LP5523_MODE_ENG3_M 0x03 | |
98 | #define LP5523_LOAD_ENG1 0x10 | |
99 | #define LP5523_LOAD_ENG2 0x04 | |
100 | #define LP5523_LOAD_ENG3 0x01 | |
101 | ||
102 | #define LP5523_ENG1_IS_LOADING(mode) \ | |
103 | ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) | |
104 | #define LP5523_ENG2_IS_LOADING(mode) \ | |
105 | ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) | |
106 | #define LP5523_ENG3_IS_LOADING(mode) \ | |
107 | ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) | |
108 | ||
109 | #define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ | |
110 | #define LP5523_EXEC_ENG2_M 0x0C | |
111 | #define LP5523_EXEC_ENG3_M 0x03 | |
112 | #define LP5523_EXEC_M 0x3F | |
113 | #define LP5523_RUN_ENG1 0x20 | |
114 | #define LP5523_RUN_ENG2 0x08 | |
115 | #define LP5523_RUN_ENG3 0x02 | |
116 | ||
45e611bf MK |
117 | #define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) |
118 | ||
27d7704e KM |
119 | enum lp5523_chip_id { |
120 | LP5523, | |
121 | LP55231, | |
122 | }; | |
123 | ||
22460438 MK |
124 | static int lp5523_init_program_engine(struct lp55xx_chip *chip); |
125 | ||
db6eaf83 MWK |
126 | static inline void lp5523_wait_opmode_done(void) |
127 | { | |
128 | usleep_range(1000, 2000); | |
129 | } | |
130 | ||
a96bfa13 MWK |
131 | static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) |
132 | { | |
133 | led->led_current = led_current; | |
134 | lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, | |
135 | led_current); | |
136 | } | |
137 | ||
ffbdccdb | 138 | static int lp5523_post_init_device(struct lp55xx_chip *chip) |
0efba16c | 139 | { |
ffbdccdb | 140 | int ret; |
0efba16c | 141 | |
ffbdccdb | 142 | ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); |
632418bf MWK |
143 | if (ret) |
144 | return ret; | |
0efba16c | 145 | |
2e4840ed SO |
146 | /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ |
147 | usleep_range(1000, 2000); | |
0efba16c | 148 | |
ffbdccdb | 149 | ret = lp55xx_write(chip, LP5523_REG_CONFIG, |
0efba16c SO |
150 | LP5523_AUTO_INC | LP5523_PWR_SAVE | |
151 | LP5523_CP_AUTO | LP5523_AUTO_CLK | | |
152 | LP5523_PWM_PWR_SAVE); | |
632418bf MWK |
153 | if (ret) |
154 | return ret; | |
0efba16c SO |
155 | |
156 | /* turn on all leds */ | |
ffbdccdb | 157 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); |
632418bf | 158 | if (ret) |
1b21ec5a JH |
159 | return ret; |
160 | ||
22460438 MK |
161 | ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); |
162 | if (ret) | |
163 | return ret; | |
164 | ||
165 | return lp5523_init_program_engine(chip); | |
0efba16c SO |
166 | } |
167 | ||
db6eaf83 | 168 | static void lp5523_load_engine(struct lp55xx_chip *chip) |
0efba16c | 169 | { |
db6eaf83 | 170 | enum lp55xx_engine_index idx = chip->engine_idx; |
4d1707c1 | 171 | static const u8 mask[] = { |
db6eaf83 MWK |
172 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
173 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
174 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
175 | }; | |
176 | ||
4d1707c1 | 177 | static const u8 val[] = { |
db6eaf83 MWK |
178 | [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, |
179 | [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, | |
180 | [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, | |
181 | }; | |
182 | ||
b9e1730b MK |
183 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); |
184 | ||
185 | lp5523_wait_opmode_done(); | |
186 | } | |
187 | ||
188 | static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) | |
189 | { | |
190 | enum lp55xx_engine_index idx = chip->engine_idx; | |
4d1707c1 | 191 | static const u8 page_sel[] = { |
db6eaf83 MWK |
192 | [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, |
193 | [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, | |
194 | [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, | |
195 | }; | |
196 | ||
b9e1730b | 197 | lp5523_load_engine(chip); |
db6eaf83 MWK |
198 | |
199 | lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); | |
0efba16c SO |
200 | } |
201 | ||
28c9266b | 202 | static void lp5523_stop_all_engines(struct lp55xx_chip *chip) |
0efba16c | 203 | { |
db6eaf83 MWK |
204 | lp55xx_write(chip, LP5523_REG_OP_MODE, 0); |
205 | lp5523_wait_opmode_done(); | |
206 | } | |
0efba16c | 207 | |
28c9266b MK |
208 | static void lp5523_stop_engine(struct lp55xx_chip *chip) |
209 | { | |
210 | enum lp55xx_engine_index idx = chip->engine_idx; | |
4d1707c1 | 211 | static const u8 mask[] = { |
28c9266b MK |
212 | [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, |
213 | [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, | |
214 | [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, | |
215 | }; | |
216 | ||
217 | lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); | |
218 | ||
219 | lp5523_wait_opmode_done(); | |
220 | } | |
221 | ||
db6eaf83 MWK |
222 | static void lp5523_turn_off_channels(struct lp55xx_chip *chip) |
223 | { | |
224 | int i; | |
0efba16c | 225 | |
db6eaf83 MWK |
226 | for (i = 0; i < LP5523_MAX_LEDS; i++) |
227 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); | |
0efba16c SO |
228 | } |
229 | ||
db6eaf83 | 230 | static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) |
0efba16c | 231 | { |
db6eaf83 MWK |
232 | int ret; |
233 | u8 mode; | |
234 | u8 exec; | |
0efba16c | 235 | |
db6eaf83 MWK |
236 | /* stop engine */ |
237 | if (!start) { | |
238 | lp5523_stop_engine(chip); | |
239 | lp5523_turn_off_channels(chip); | |
240 | return; | |
241 | } | |
0efba16c | 242 | |
db6eaf83 MWK |
243 | /* |
244 | * To run the engine, | |
245 | * operation mode and enable register should updated at the same time | |
246 | */ | |
0efba16c | 247 | |
db6eaf83 MWK |
248 | ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); |
249 | if (ret) | |
250 | return; | |
0efba16c | 251 | |
db6eaf83 MWK |
252 | ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); |
253 | if (ret) | |
254 | return; | |
0efba16c | 255 | |
db6eaf83 MWK |
256 | /* change operation mode to RUN only when each engine is loading */ |
257 | if (LP5523_ENG1_IS_LOADING(mode)) { | |
258 | mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; | |
259 | exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; | |
260 | } | |
0efba16c | 261 | |
db6eaf83 MWK |
262 | if (LP5523_ENG2_IS_LOADING(mode)) { |
263 | mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; | |
264 | exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; | |
265 | } | |
0efba16c | 266 | |
db6eaf83 MWK |
267 | if (LP5523_ENG3_IS_LOADING(mode)) { |
268 | mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; | |
269 | exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; | |
270 | } | |
271 | ||
272 | lp55xx_write(chip, LP5523_REG_OP_MODE, mode); | |
273 | lp5523_wait_opmode_done(); | |
274 | ||
275 | lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); | |
0efba16c SO |
276 | } |
277 | ||
22460438 MK |
278 | static int lp5523_init_program_engine(struct lp55xx_chip *chip) |
279 | { | |
280 | int i; | |
281 | int j; | |
282 | int ret; | |
283 | u8 status; | |
284 | /* one pattern per engine setting LED MUX start and stop addresses */ | |
285 | static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { | |
286 | { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
287 | { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
288 | { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, | |
289 | }; | |
290 | ||
291 | /* hardcode 32 bytes of memory for each engine from program memory */ | |
292 | ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); | |
293 | if (ret) | |
294 | return ret; | |
295 | ||
296 | ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); | |
297 | if (ret) | |
298 | return ret; | |
299 | ||
300 | ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); | |
301 | if (ret) | |
302 | return ret; | |
303 | ||
304 | /* write LED MUX address space for each engine */ | |
305 | for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { | |
306 | chip->engine_idx = i; | |
307 | lp5523_load_engine_and_select_page(chip); | |
308 | ||
309 | for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { | |
310 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, | |
311 | pattern[i - 1][j]); | |
312 | if (ret) | |
313 | goto out; | |
314 | } | |
315 | } | |
316 | ||
317 | lp5523_run_engine(chip, true); | |
318 | ||
319 | /* Let the programs run for couple of ms and check the engine status */ | |
320 | usleep_range(3000, 6000); | |
321 | lp55xx_read(chip, LP5523_REG_STATUS, &status); | |
322 | status &= LP5523_ENG_STATUS_MASK; | |
323 | ||
324 | if (status != LP5523_ENG_STATUS_MASK) { | |
325 | dev_err(&chip->cl->dev, | |
f2ea85d7 | 326 | "could not configure LED engine, status = 0x%.2x\n", |
22460438 MK |
327 | status); |
328 | ret = -1; | |
329 | } | |
330 | ||
331 | out: | |
28c9266b | 332 | lp5523_stop_all_engines(chip); |
22460438 MK |
333 | return ret; |
334 | } | |
335 | ||
db6eaf83 MWK |
336 | static int lp5523_update_program_memory(struct lp55xx_chip *chip, |
337 | const u8 *data, size_t size) | |
0efba16c | 338 | { |
db6eaf83 MWK |
339 | u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; |
340 | unsigned cmd; | |
341 | char c[3]; | |
db6eaf83 | 342 | int nrchars; |
db6eaf83 | 343 | int ret; |
2f733cad MK |
344 | int offset = 0; |
345 | int i = 0; | |
0efba16c | 346 | |
db6eaf83 MWK |
347 | while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { |
348 | /* separate sscanfs because length is working only for %s */ | |
349 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
350 | if (ret != 1) | |
351 | goto err; | |
0efba16c | 352 | |
db6eaf83 MWK |
353 | ret = sscanf(c, "%2x", &cmd); |
354 | if (ret != 1) | |
355 | goto err; | |
0efba16c | 356 | |
db6eaf83 MWK |
357 | pattern[i] = (u8)cmd; |
358 | offset += nrchars; | |
359 | i++; | |
360 | } | |
0efba16c | 361 | |
db6eaf83 MWK |
362 | /* Each instruction is 16bit long. Check that length is even */ |
363 | if (i % 2) | |
364 | goto err; | |
0efba16c | 365 | |
2f733cad | 366 | for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { |
45e611bf | 367 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); |
e70988d1 | 368 | if (ret) |
45e611bf | 369 | return -EINVAL; |
45e611bf MK |
370 | } |
371 | ||
45e611bf | 372 | return size; |
0efba16c | 373 | |
db6eaf83 MWK |
374 | err: |
375 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
376 | return -EINVAL; | |
0efba16c | 377 | } |
0efba16c | 378 | |
db6eaf83 | 379 | static void lp5523_firmware_loaded(struct lp55xx_chip *chip) |
0efba16c | 380 | { |
db6eaf83 | 381 | const struct firmware *fw = chip->fw; |
fbac0812 | 382 | |
db6eaf83 MWK |
383 | if (fw->size > LP5523_PROGRAM_LENGTH) { |
384 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
385 | fw->size); | |
386 | return; | |
387 | } | |
0efba16c | 388 | |
db6eaf83 | 389 | /* |
d1b7c934 | 390 | * Program memory sequence |
db6eaf83 MWK |
391 | * 1) set engine mode to "LOAD" |
392 | * 2) write firmware data into program memory | |
393 | */ | |
0efba16c | 394 | |
b9e1730b | 395 | lp5523_load_engine_and_select_page(chip); |
db6eaf83 | 396 | lp5523_update_program_memory(chip, fw->data, fw->size); |
0efba16c | 397 | } |
0efba16c | 398 | |
45e611bf MK |
399 | static ssize_t show_engine_mode(struct device *dev, |
400 | struct device_attribute *attr, | |
401 | char *buf, int nr) | |
402 | { | |
403 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
404 | struct lp55xx_chip *chip = led->chip; | |
405 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; | |
406 | ||
407 | switch (mode) { | |
408 | case LP55XX_ENGINE_RUN: | |
409 | return sprintf(buf, "run\n"); | |
410 | case LP55XX_ENGINE_LOAD: | |
411 | return sprintf(buf, "load\n"); | |
412 | case LP55XX_ENGINE_DISABLED: | |
413 | default: | |
414 | return sprintf(buf, "disabled\n"); | |
415 | } | |
416 | } | |
417 | show_mode(1) | |
418 | show_mode(2) | |
419 | show_mode(3) | |
420 | ||
421 | static ssize_t store_engine_mode(struct device *dev, | |
422 | struct device_attribute *attr, | |
423 | const char *buf, size_t len, int nr) | |
424 | { | |
425 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
426 | struct lp55xx_chip *chip = led->chip; | |
427 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
428 | ||
429 | mutex_lock(&chip->lock); | |
430 | ||
431 | chip->engine_idx = nr; | |
432 | ||
433 | if (!strncmp(buf, "run", 3)) { | |
434 | lp5523_run_engine(chip, true); | |
435 | engine->mode = LP55XX_ENGINE_RUN; | |
436 | } else if (!strncmp(buf, "load", 4)) { | |
437 | lp5523_stop_engine(chip); | |
438 | lp5523_load_engine(chip); | |
439 | engine->mode = LP55XX_ENGINE_LOAD; | |
440 | } else if (!strncmp(buf, "disabled", 8)) { | |
441 | lp5523_stop_engine(chip); | |
442 | engine->mode = LP55XX_ENGINE_DISABLED; | |
443 | } | |
444 | ||
445 | mutex_unlock(&chip->lock); | |
446 | ||
447 | return len; | |
448 | } | |
449 | store_mode(1) | |
450 | store_mode(2) | |
451 | store_mode(3) | |
452 | ||
453 | static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) | |
454 | { | |
455 | u16 tmp_mux = 0; | |
456 | int i; | |
457 | ||
458 | len = min_t(int, len, LP5523_MAX_LEDS); | |
459 | ||
460 | for (i = 0; i < len; i++) { | |
461 | switch (buf[i]) { | |
462 | case '1': | |
463 | tmp_mux |= (1 << i); | |
464 | break; | |
465 | case '0': | |
466 | break; | |
467 | case '\n': | |
468 | i = len; | |
469 | break; | |
470 | default: | |
471 | return -1; | |
472 | } | |
473 | } | |
474 | *mux = tmp_mux; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static void lp5523_mux_to_array(u16 led_mux, char *array) | |
480 | { | |
481 | int i, pos = 0; | |
482 | for (i = 0; i < LP5523_MAX_LEDS; i++) | |
483 | pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); | |
484 | ||
485 | array[pos] = '\0'; | |
486 | } | |
487 | ||
488 | static ssize_t show_engine_leds(struct device *dev, | |
489 | struct device_attribute *attr, | |
490 | char *buf, int nr) | |
491 | { | |
492 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
493 | struct lp55xx_chip *chip = led->chip; | |
494 | char mux[LP5523_MAX_LEDS + 1]; | |
495 | ||
496 | lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); | |
497 | ||
498 | return sprintf(buf, "%s\n", mux); | |
499 | } | |
500 | show_leds(1) | |
501 | show_leds(2) | |
502 | show_leds(3) | |
503 | ||
504 | static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) | |
505 | { | |
506 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
507 | int ret; | |
4d1707c1 | 508 | static const u8 mux_page[] = { |
45e611bf MK |
509 | [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, |
510 | [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, | |
511 | [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, | |
512 | }; | |
513 | ||
514 | lp5523_load_engine(chip); | |
515 | ||
516 | ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); | |
517 | if (ret) | |
518 | return ret; | |
519 | ||
520 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8)); | |
521 | if (ret) | |
522 | return ret; | |
523 | ||
524 | ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); | |
525 | if (ret) | |
526 | return ret; | |
527 | ||
528 | engine->led_mux = mux; | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static ssize_t store_engine_leds(struct device *dev, | |
533 | struct device_attribute *attr, | |
534 | const char *buf, size_t len, int nr) | |
535 | { | |
536 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
537 | struct lp55xx_chip *chip = led->chip; | |
538 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
539 | u16 mux = 0; | |
540 | ssize_t ret; | |
541 | ||
542 | if (lp5523_mux_parse(buf, &mux, len)) | |
543 | return -EINVAL; | |
544 | ||
545 | mutex_lock(&chip->lock); | |
546 | ||
547 | chip->engine_idx = nr; | |
548 | ret = -EINVAL; | |
549 | ||
550 | if (engine->mode != LP55XX_ENGINE_LOAD) | |
551 | goto leave; | |
552 | ||
553 | if (lp5523_load_mux(chip, mux, nr)) | |
554 | goto leave; | |
555 | ||
556 | ret = len; | |
557 | leave: | |
558 | mutex_unlock(&chip->lock); | |
559 | return ret; | |
560 | } | |
561 | store_leds(1) | |
562 | store_leds(2) | |
563 | store_leds(3) | |
564 | ||
565 | static ssize_t store_engine_load(struct device *dev, | |
566 | struct device_attribute *attr, | |
567 | const char *buf, size_t len, int nr) | |
568 | { | |
569 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
570 | struct lp55xx_chip *chip = led->chip; | |
e70988d1 | 571 | int ret; |
45e611bf MK |
572 | |
573 | mutex_lock(&chip->lock); | |
574 | ||
575 | chip->engine_idx = nr; | |
576 | lp5523_load_engine_and_select_page(chip); | |
e70988d1 | 577 | ret = lp5523_update_program_memory(chip, buf, len); |
45e611bf MK |
578 | |
579 | mutex_unlock(&chip->lock); | |
580 | ||
e70988d1 | 581 | return ret; |
45e611bf MK |
582 | } |
583 | store_load(1) | |
584 | store_load(2) | |
585 | store_load(3) | |
586 | ||
0efba16c SO |
587 | static ssize_t lp5523_selftest(struct device *dev, |
588 | struct device_attribute *attr, | |
589 | char *buf) | |
590 | { | |
9ca3bd80 MWK |
591 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
592 | struct lp55xx_chip *chip = led->chip; | |
593 | struct lp55xx_platform_data *pdata = chip->pdata; | |
0efba16c | 594 | int i, ret, pos = 0; |
0efba16c SO |
595 | u8 status, adc, vdd; |
596 | ||
597 | mutex_lock(&chip->lock); | |
598 | ||
9ca3bd80 | 599 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
0efba16c SO |
600 | if (ret < 0) |
601 | goto fail; | |
602 | ||
603 | /* Check that ext clock is really in use if requested */ | |
9ca3bd80 | 604 | if (pdata->clock_mode == LP55XX_CLOCK_EXT) { |
0efba16c SO |
605 | if ((status & LP5523_EXT_CLK_USED) == 0) |
606 | goto fail; | |
9ca3bd80 | 607 | } |
0efba16c SO |
608 | |
609 | /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ | |
9ca3bd80 | 610 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); |
2e4840ed | 611 | usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ |
9ca3bd80 | 612 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
613 | if (ret < 0) |
614 | goto fail; | |
615 | ||
0efba16c | 616 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 617 | usleep_range(3000, 6000); /* Was not ready. Wait little bit */ |
0efba16c | 618 | |
9ca3bd80 | 619 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); |
1b21ec5a JH |
620 | if (ret < 0) |
621 | goto fail; | |
622 | ||
0efba16c SO |
623 | vdd--; /* There may be some fluctuation in measurement */ |
624 | ||
0e202346 | 625 | for (i = 0; i < LP5523_MAX_LEDS; i++) { |
0efba16c | 626 | /* Skip non-existing channels */ |
9ca3bd80 | 627 | if (pdata->led_config[i].led_current == 0) |
0efba16c SO |
628 | continue; |
629 | ||
630 | /* Set default current */ | |
9ca3bd80 MWK |
631 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
632 | pdata->led_config[i].led_current); | |
0efba16c | 633 | |
9ca3bd80 | 634 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff); |
2e4840ed SO |
635 | /* let current stabilize 2 - 4ms before measurements start */ |
636 | usleep_range(2000, 4000); | |
9ca3bd80 | 637 | lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, |
0efba16c | 638 | LP5523_EN_LEDTEST | i); |
2e4840ed SO |
639 | /* ADC conversion time is 2.7 ms typically */ |
640 | usleep_range(3000, 6000); | |
9ca3bd80 | 641 | ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); |
1b21ec5a JH |
642 | if (ret < 0) |
643 | goto fail; | |
644 | ||
0efba16c | 645 | if (!(status & LP5523_LEDTEST_DONE)) |
2e4840ed | 646 | usleep_range(3000, 6000);/* Was not ready. Wait. */ |
9ca3bd80 MWK |
647 | |
648 | ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); | |
1b21ec5a JH |
649 | if (ret < 0) |
650 | goto fail; | |
0efba16c SO |
651 | |
652 | if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) | |
653 | pos += sprintf(buf + pos, "LED %d FAIL\n", i); | |
654 | ||
9ca3bd80 | 655 | lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00); |
0efba16c SO |
656 | |
657 | /* Restore current */ | |
9ca3bd80 MWK |
658 | lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i, |
659 | led->led_current); | |
0efba16c SO |
660 | led++; |
661 | } | |
662 | if (pos == 0) | |
663 | pos = sprintf(buf, "OK\n"); | |
664 | goto release_lock; | |
665 | fail: | |
666 | pos = sprintf(buf, "FAIL\n"); | |
667 | ||
668 | release_lock: | |
669 | mutex_unlock(&chip->lock); | |
670 | ||
671 | return pos; | |
672 | } | |
673 | ||
52da81ea TK |
674 | #define show_fader(nr) \ |
675 | static ssize_t show_master_fader##nr(struct device *dev, \ | |
676 | struct device_attribute *attr, \ | |
677 | char *buf) \ | |
678 | { \ | |
679 | return show_master_fader(dev, attr, buf, nr); \ | |
680 | } | |
681 | ||
682 | #define store_fader(nr) \ | |
683 | static ssize_t store_master_fader##nr(struct device *dev, \ | |
684 | struct device_attribute *attr, \ | |
685 | const char *buf, size_t len) \ | |
686 | { \ | |
687 | return store_master_fader(dev, attr, buf, len, nr); \ | |
688 | } | |
689 | ||
690 | static ssize_t show_master_fader(struct device *dev, | |
691 | struct device_attribute *attr, | |
692 | char *buf, int nr) | |
693 | { | |
694 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
695 | struct lp55xx_chip *chip = led->chip; | |
696 | int ret; | |
697 | u8 val; | |
698 | ||
699 | mutex_lock(&chip->lock); | |
700 | ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val); | |
701 | mutex_unlock(&chip->lock); | |
702 | ||
703 | if (ret == 0) | |
704 | ret = sprintf(buf, "%u\n", val); | |
705 | ||
706 | return ret; | |
707 | } | |
708 | show_fader(1) | |
709 | show_fader(2) | |
710 | show_fader(3) | |
711 | ||
712 | static ssize_t store_master_fader(struct device *dev, | |
713 | struct device_attribute *attr, | |
714 | const char *buf, size_t len, int nr) | |
715 | { | |
716 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
717 | struct lp55xx_chip *chip = led->chip; | |
718 | int ret; | |
719 | unsigned long val; | |
720 | ||
721 | if (kstrtoul(buf, 0, &val)) | |
722 | return -EINVAL; | |
723 | ||
724 | if (val > 0xff) | |
725 | return -EINVAL; | |
726 | ||
727 | mutex_lock(&chip->lock); | |
728 | ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, | |
729 | (u8)val); | |
730 | mutex_unlock(&chip->lock); | |
731 | ||
732 | if (ret == 0) | |
733 | ret = len; | |
734 | ||
735 | return ret; | |
736 | } | |
737 | store_fader(1) | |
738 | store_fader(2) | |
739 | store_fader(3) | |
740 | ||
741 | static ssize_t show_master_fader_leds(struct device *dev, | |
742 | struct device_attribute *attr, | |
743 | char *buf) | |
744 | { | |
745 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
746 | struct lp55xx_chip *chip = led->chip; | |
747 | int i, ret, pos = 0; | |
748 | u8 val; | |
749 | ||
750 | mutex_lock(&chip->lock); | |
751 | ||
752 | for (i = 0; i < LP5523_MAX_LEDS; i++) { | |
753 | ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val); | |
754 | if (ret) | |
755 | goto leave; | |
756 | ||
757 | val = (val & LP5523_FADER_MAPPING_MASK) | |
758 | >> LP5523_FADER_MAPPING_SHIFT; | |
759 | if (val > 3) { | |
760 | ret = -EINVAL; | |
761 | goto leave; | |
762 | } | |
763 | buf[pos++] = val + '0'; | |
764 | } | |
765 | buf[pos++] = '\n'; | |
766 | ret = pos; | |
767 | leave: | |
768 | mutex_unlock(&chip->lock); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static ssize_t store_master_fader_leds(struct device *dev, | |
773 | struct device_attribute *attr, | |
774 | const char *buf, size_t len) | |
775 | { | |
776 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
777 | struct lp55xx_chip *chip = led->chip; | |
778 | int i, n, ret; | |
779 | u8 val; | |
780 | ||
781 | n = min_t(int, len, LP5523_MAX_LEDS); | |
782 | ||
783 | mutex_lock(&chip->lock); | |
784 | ||
785 | for (i = 0; i < n; i++) { | |
786 | if (buf[i] >= '0' && buf[i] <= '3') { | |
787 | val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT; | |
788 | ret = lp55xx_update_bits(chip, | |
789 | LP5523_REG_LED_CTRL_BASE + i, | |
790 | LP5523_FADER_MAPPING_MASK, | |
791 | val); | |
792 | if (ret) | |
793 | goto leave; | |
794 | } else { | |
795 | ret = -EINVAL; | |
796 | goto leave; | |
797 | } | |
798 | } | |
799 | ret = len; | |
800 | leave: | |
801 | mutex_unlock(&chip->lock); | |
802 | return ret; | |
803 | } | |
804 | ||
95b2af63 | 805 | static int lp5523_led_brightness(struct lp55xx_led *led) |
0efba16c | 806 | { |
a6e4679a | 807 | struct lp55xx_chip *chip = led->chip; |
95b2af63 | 808 | int ret; |
0efba16c SO |
809 | |
810 | mutex_lock(&chip->lock); | |
95b2af63 | 811 | ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, |
0efba16c | 812 | led->brightness); |
0efba16c | 813 | mutex_unlock(&chip->lock); |
95b2af63 | 814 | return ret; |
0efba16c SO |
815 | } |
816 | ||
45e611bf MK |
817 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
818 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); | |
819 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); | |
820 | static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); | |
821 | static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); | |
822 | static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); | |
823 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); | |
824 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); | |
825 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); | |
826 | static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); | |
52da81ea TK |
827 | static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1, |
828 | store_master_fader1); | |
829 | static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2, | |
830 | store_master_fader2); | |
831 | static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3, | |
832 | store_master_fader3); | |
833 | static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds, | |
834 | store_master_fader_leds); | |
0efba16c SO |
835 | |
836 | static struct attribute *lp5523_attributes[] = { | |
45e611bf MK |
837 | &dev_attr_engine1_mode.attr, |
838 | &dev_attr_engine2_mode.attr, | |
839 | &dev_attr_engine3_mode.attr, | |
840 | &dev_attr_engine1_load.attr, | |
841 | &dev_attr_engine2_load.attr, | |
842 | &dev_attr_engine3_load.attr, | |
843 | &dev_attr_engine1_leds.attr, | |
844 | &dev_attr_engine2_leds.attr, | |
845 | &dev_attr_engine3_leds.attr, | |
0efba16c | 846 | &dev_attr_selftest.attr, |
52da81ea TK |
847 | &dev_attr_master_fader1.attr, |
848 | &dev_attr_master_fader2.attr, | |
849 | &dev_attr_master_fader3.attr, | |
850 | &dev_attr_master_fader_leds.attr, | |
f1625842 | 851 | NULL, |
0efba16c SO |
852 | }; |
853 | ||
854 | static const struct attribute_group lp5523_group = { | |
855 | .attrs = lp5523_attributes, | |
856 | }; | |
857 | ||
48068d5d MWK |
858 | /* Chip specific configurations */ |
859 | static struct lp55xx_device_config lp5523_cfg = { | |
860 | .reset = { | |
861 | .addr = LP5523_REG_RESET, | |
862 | .val = LP5523_RESET, | |
863 | }, | |
e3a700d8 MWK |
864 | .enable = { |
865 | .addr = LP5523_REG_ENABLE, | |
866 | .val = LP5523_ENABLE, | |
867 | }, | |
0e202346 | 868 | .max_channel = LP5523_MAX_LEDS, |
ffbdccdb | 869 | .post_init_device = lp5523_post_init_device, |
95b2af63 | 870 | .brightness_fn = lp5523_led_brightness, |
a96bfa13 | 871 | .set_led_current = lp5523_set_led_current, |
db6eaf83 MWK |
872 | .firmware_cb = lp5523_firmware_loaded, |
873 | .run_engine = lp5523_run_engine, | |
e73c0ce6 | 874 | .dev_attr_group = &lp5523_group, |
48068d5d MWK |
875 | }; |
876 | ||
98ea1ea2 | 877 | static int lp5523_probe(struct i2c_client *client, |
0efba16c SO |
878 | const struct i2c_device_id *id) |
879 | { | |
22ebeb48 | 880 | int ret; |
6a0c9a47 MWK |
881 | struct lp55xx_chip *chip; |
882 | struct lp55xx_led *led; | |
ed133352 | 883 | struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev); |
7542a04b LW |
884 | struct device_node *np = client->dev.of_node; |
885 | ||
ed133352 | 886 | if (!pdata) { |
7542a04b | 887 | if (np) { |
ed133352 MK |
888 | pdata = lp55xx_of_populate_pdata(&client->dev, np); |
889 | if (IS_ERR(pdata)) | |
890 | return PTR_ERR(pdata); | |
7542a04b LW |
891 | } else { |
892 | dev_err(&client->dev, "no platform data\n"); | |
893 | return -EINVAL; | |
894 | } | |
0efba16c SO |
895 | } |
896 | ||
6a0c9a47 MWK |
897 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
898 | if (!chip) | |
899 | return -ENOMEM; | |
900 | ||
a86854d0 KC |
901 | led = devm_kcalloc(&client->dev, |
902 | pdata->num_channels, sizeof(*led), GFP_KERNEL); | |
6a0c9a47 MWK |
903 | if (!led) |
904 | return -ENOMEM; | |
905 | ||
906 | chip->cl = client; | |
907 | chip->pdata = pdata; | |
48068d5d | 908 | chip->cfg = &lp5523_cfg; |
6a0c9a47 MWK |
909 | |
910 | mutex_init(&chip->lock); | |
0efba16c | 911 | |
6a0c9a47 | 912 | i2c_set_clientdata(client, led); |
0efba16c | 913 | |
22ebeb48 | 914 | ret = lp55xx_init_device(chip); |
0efba16c | 915 | if (ret) |
f6c64c6f | 916 | goto err_init; |
0efba16c | 917 | |
56a1e9ad | 918 | dev_info(&client->dev, "%s Programmable led chip found\n", id->name); |
0efba16c | 919 | |
9e9b3db1 | 920 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 921 | if (ret) |
9e9b3db1 | 922 | goto err_register_leds; |
0efba16c | 923 | |
e73c0ce6 | 924 | ret = lp55xx_register_sysfs(chip); |
0efba16c SO |
925 | if (ret) { |
926 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 927 | goto err_register_sysfs; |
0efba16c | 928 | } |
e73c0ce6 MWK |
929 | |
930 | return 0; | |
931 | ||
932 | err_register_sysfs: | |
c3a68ebf | 933 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 934 | err_register_leds: |
6ce61762 | 935 | lp55xx_deinit_device(chip); |
f6c64c6f | 936 | err_init: |
0efba16c SO |
937 | return ret; |
938 | } | |
939 | ||
940 | static int lp5523_remove(struct i2c_client *client) | |
941 | { | |
6ce61762 MWK |
942 | struct lp55xx_led *led = i2c_get_clientdata(client); |
943 | struct lp55xx_chip *chip = led->chip; | |
0efba16c | 944 | |
28c9266b | 945 | lp5523_stop_all_engines(chip); |
87cc4bde | 946 | lp55xx_unregister_sysfs(chip); |
c3a68ebf | 947 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 948 | lp55xx_deinit_device(chip); |
0efba16c | 949 | |
0efba16c SO |
950 | return 0; |
951 | } | |
952 | ||
953 | static const struct i2c_device_id lp5523_id[] = { | |
27d7704e KM |
954 | { "lp5523", LP5523 }, |
955 | { "lp55231", LP55231 }, | |
0efba16c SO |
956 | { } |
957 | }; | |
958 | ||
959 | MODULE_DEVICE_TABLE(i2c, lp5523_id); | |
960 | ||
33c88b67 AL |
961 | #ifdef CONFIG_OF |
962 | static const struct of_device_id of_lp5523_leds_match[] = { | |
963 | { .compatible = "national,lp5523", }, | |
9ef8c877 | 964 | { .compatible = "ti,lp55231", }, |
33c88b67 AL |
965 | {}, |
966 | }; | |
967 | ||
968 | MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); | |
969 | #endif | |
970 | ||
0efba16c SO |
971 | static struct i2c_driver lp5523_driver = { |
972 | .driver = { | |
27d7704e | 973 | .name = "lp5523x", |
33c88b67 | 974 | .of_match_table = of_match_ptr(of_lp5523_leds_match), |
0efba16c SO |
975 | }, |
976 | .probe = lp5523_probe, | |
977 | .remove = lp5523_remove, | |
978 | .id_table = lp5523_id, | |
979 | }; | |
980 | ||
09a0d183 | 981 | module_i2c_driver(lp5523_driver); |
0efba16c SO |
982 | |
983 | MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); | |
a2387cb9 | 984 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
0efba16c SO |
985 | MODULE_DESCRIPTION("LP5523 LED engine"); |
986 | MODULE_LICENSE("GPL"); |