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leds-lp5521: use generic firmware interface
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / leds / leds-lp5523.c
CommitLineData
0efba16c
SO		 1/*
2 * lp5523.c - LP5523 LED 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-lp5523.h>
35#include <linux/workqueue.h>
36#include <linux/slab.h>
6a0c9a47
MWK		 37#include <linux/platform_data/leds-lp55xx.h>
38
39#include "leds-lp55xx-common.h"
0efba16c
SO		 40
41#define LP5523_REG_ENABLE 0x00
42#define LP5523_REG_OP_MODE 0x01
43#define LP5523_REG_RATIOMETRIC_MSB 0x02
44#define LP5523_REG_RATIOMETRIC_LSB 0x03
45#define LP5523_REG_ENABLE_LEDS_MSB 0x04
46#define LP5523_REG_ENABLE_LEDS_LSB 0x05
47#define LP5523_REG_LED_CNTRL_BASE 0x06
48#define LP5523_REG_LED_PWM_BASE 0x16
49#define LP5523_REG_LED_CURRENT_BASE 0x26
50#define LP5523_REG_CONFIG 0x36
51#define LP5523_REG_CHANNEL1_PC 0x37
52#define LP5523_REG_CHANNEL2_PC 0x38
53#define LP5523_REG_CHANNEL3_PC 0x39
54#define LP5523_REG_STATUS 0x3a
55#define LP5523_REG_GPO 0x3b
56#define LP5523_REG_VARIABLE 0x3c
57#define LP5523_REG_RESET 0x3d
58#define LP5523_REG_TEMP_CTRL 0x3e
59#define LP5523_REG_TEMP_READ 0x3f
60#define LP5523_REG_TEMP_WRITE 0x40
61#define LP5523_REG_LED_TEST_CTRL 0x41
62#define LP5523_REG_LED_TEST_ADC 0x42
63#define LP5523_REG_ENG1_VARIABLE 0x45
64#define LP5523_REG_ENG2_VARIABLE 0x46
65#define LP5523_REG_ENG3_VARIABLE 0x47
66#define LP5523_REG_MASTER_FADER1 0x48
67#define LP5523_REG_MASTER_FADER2 0x49
68#define LP5523_REG_MASTER_FADER3 0x4a
69#define LP5523_REG_CH1_PROG_START 0x4c
70#define LP5523_REG_CH2_PROG_START 0x4d
71#define LP5523_REG_CH3_PROG_START 0x4e
72#define LP5523_REG_PROG_PAGE_SEL 0x4f
73#define LP5523_REG_PROG_MEM 0x50
74
75#define LP5523_CMD_LOAD 0x15 /* 00010101 */
76#define LP5523_CMD_RUN 0x2a /* 00101010 */
77#define LP5523_CMD_DISABLED 0x00 /* 00000000 */
78
79#define LP5523_ENABLE 0x40
80#define LP5523_AUTO_INC 0x40
81#define LP5523_PWR_SAVE 0x20
82#define LP5523_PWM_PWR_SAVE 0x04
83#define LP5523_CP_1 0x08
84#define LP5523_CP_1_5 0x10
85#define LP5523_CP_AUTO 0x18
86#define LP5523_INT_CLK 0x01
87#define LP5523_AUTO_CLK 0x02
88#define LP5523_EN_LEDTEST 0x80
89#define LP5523_LEDTEST_DONE 0x80
48068d5d 90#define LP5523_RESET 0xFF
0efba16c
SO		 91
92#define LP5523_DEFAULT_CURRENT 50 /* microAmps */
93#define LP5523_PROGRAM_LENGTH 32 /* in bytes */
94#define LP5523_PROGRAM_PAGES 6
95#define LP5523_ADC_SHORTCIRC_LIM 80
96
0e202346 97#define LP5523_MAX_LEDS 9
0efba16c
SO		 98#define LP5523_ENGINES 3
99
100#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */
101
102#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */
103
104#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING
105
106#define LP5523_EXT_CLK_USED 0x08
107
108#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
109#define SHIFT_MASK(id) (((id) - 1) * 2)
110
27d7704e
KM		 111enum lp5523_chip_id {
112 LP5523,
113 LP55231,
114};
115
0efba16c 116struct lp5523_engine {
0efba16c
SO		 117 int id;
118 u8 mode;
119 u8 prog_page;
120 u8 mux_page;
121 u16 led_mux;
122 u8 engine_mask;
123};
124
125struct lp5523_led {
126 int id;
127 u8 chan_nr;
128 u8 led_current;
129 u8 max_current;
130 struct led_classdev cdev;
131 struct work_struct brightness_work;
132 u8 brightness;
133};
134
135struct lp5523_chip {
136 struct mutex lock; /* Serialize control */
137 struct i2c_client *client;
138 struct lp5523_engine engines[LP5523_ENGINES];
0e202346 139 struct lp5523_led leds[LP5523_MAX_LEDS];
0efba16c
SO		 140 struct lp5523_platform_data *pdata;
141 u8 num_channels;
142 u8 num_leds;
143};
144
a96bfa13
MWK		 145static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
146{
147 led->led_current = led_current;
148 lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
149 led_current);
150}
151
87dbf623
SO		 152static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
153{
154 return container_of(cdev, struct lp5523_led, cdev);
155}
0efba16c 156
87dbf623 157static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
0efba16c
SO		 158{
159 return container_of(engine, struct lp5523_chip,
160 engines[engine->id - 1]);
161}
162
87dbf623 163static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
0efba16c
SO		 164{
165 return container_of(led, struct lp5523_chip,
166 leds[led->id]);
167}
168
6f6365fb 169static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
0efba16c 170static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
d06cb46c 171static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
0efba16c 172
0efba16c
SO		 173static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
174{
175 return i2c_smbus_write_byte_data(client, reg, value);
176}
177
178static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
179{
180 s32 ret = i2c_smbus_read_byte_data(client, reg);
181
182 if (ret < 0)
5ebab74a 183 return ret;
0efba16c
SO		 184
185 *buf = ret;
186 return 0;
187}
188
ffbdccdb 189static int lp5523_post_init_device(struct lp55xx_chip *chip)
0efba16c 190{
ffbdccdb 191 int ret;
0efba16c 192
ffbdccdb 193 ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
632418bf
MWK		 194 if (ret)
195 return ret;
0efba16c 196
2e4840ed
SO		 197 /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
198 usleep_range(1000, 2000);
0efba16c 199
ffbdccdb 200 ret = lp55xx_write(chip, LP5523_REG_CONFIG,
0efba16c
SO		 201 LP5523_AUTO_INC | LP5523_PWR_SAVE |
202 LP5523_CP_AUTO | LP5523_AUTO_CLK |
203 LP5523_PWM_PWR_SAVE);
632418bf
MWK		 204 if (ret)
205 return ret;
0efba16c
SO		 206
207 /* turn on all leds */
ffbdccdb 208 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
632418bf 209 if (ret)
1b21ec5a
JH		 210 return ret;
211
ffbdccdb 212 return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
0efba16c
SO		 213}
214
215static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
216{
217 struct lp5523_chip *chip = engine_to_lp5523(engine);
218 struct i2c_client *client = chip->client;
219 int ret;
220 u8 engine_state;
221
222 ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
223 if (ret)
224 goto fail;
225
226 engine_state &= ~(engine->engine_mask);
227
228 /* set mode only for this engine */
229 mode &= engine->engine_mask;
230
231 engine_state |= mode;
232
233 ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
234fail:
235 return ret;
236}
237
238static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
239{
240 struct lp5523_chip *chip = engine_to_lp5523(engine);
241 struct i2c_client *client = chip->client;
242 int ret = 0;
243
244 ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
245
246 ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
247 ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
248 (u8)(mux >> 8));
249 ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
250 engine->led_mux = mux;
251
252 return ret;
253}
254
d06cb46c 255static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern)
0efba16c
SO		 256{
257 struct lp5523_chip *chip = engine_to_lp5523(engine);
258 struct i2c_client *client = chip->client;
259
260 int ret = 0;
261
262 ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
263
264 ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
265 engine->prog_page);
266 ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
267 LP5523_PROGRAM_LENGTH, pattern);
268
269 return ret;
270}
271
272static int lp5523_run_program(struct lp5523_engine *engine)
273{
274 struct lp5523_chip *chip = engine_to_lp5523(engine);
275 struct i2c_client *client = chip->client;
276 int ret;
277
278 ret = lp5523_write(client, LP5523_REG_ENABLE,
279 LP5523_CMD_RUN | LP5523_ENABLE);
280 if (ret)
281 goto fail;
282
283 ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
284fail:
285 return ret;
286}
287
288static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
289{
290 int i;
291 u16 tmp_mux = 0;
469eba02 292
0e202346 293 len = min_t(int, len, LP5523_MAX_LEDS);
0efba16c
SO		 294 for (i = 0; i < len; i++) {
295 switch (buf[i]) {
296 case '1':
297 tmp_mux |= (1 << i);
298 break;
299 case '0':
300 break;
301 case '\n':
302 i = len;
303 break;
304 default:
305 return -1;
306 }
307 }
308 *mux = tmp_mux;
309
310 return 0;
311}
312
313static void lp5523_mux_to_array(u16 led_mux, char *array)
314{
315 int i, pos = 0;
0e202346 316 for (i = 0; i < LP5523_MAX_LEDS; i++)
0efba16c
SO		 317 pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
318
319 array[pos] = '\0';
320}
321
322/*--------------------------------------------------------------*/
323/* Sysfs interface */
324/*--------------------------------------------------------------*/
325
326static ssize_t show_engine_leds(struct device *dev,
327 struct device_attribute *attr,
328 char *buf, int nr)
329{
330 struct i2c_client *client = to_i2c_client(dev);
331 struct lp5523_chip *chip = i2c_get_clientdata(client);
0e202346 332 char mux[LP5523_MAX_LEDS + 1];
0efba16c
SO		 333
334 lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
335
336 return sprintf(buf, "%s\n", mux);
337}
338
339#define show_leds(nr) \
340static ssize_t show_engine##nr##_leds(struct device *dev, \
341 struct device_attribute *attr, \
342 char *buf) \
343{ \
344 return show_engine_leds(dev, attr, buf, nr); \
345}
346show_leds(1)
347show_leds(2)
348show_leds(3)
349
350static ssize_t store_engine_leds(struct device *dev,
351 struct device_attribute *attr,
352 const char *buf, size_t len, int nr)
353{
354 struct i2c_client *client = to_i2c_client(dev);
355 struct lp5523_chip *chip = i2c_get_clientdata(client);
356 u16 mux = 0;
fbac0812 357 ssize_t ret;
0efba16c
SO		 358
359 if (lp5523_mux_parse(buf, &mux, len))
360 return -EINVAL;
361
fbac0812
SO		 362 mutex_lock(&chip->lock);
363 ret = -EINVAL;
364 if (chip->engines[nr - 1].mode != LP5523_CMD_LOAD)
365 goto leave;
366
0efba16c 367 if (lp5523_load_mux(&chip->engines[nr - 1], mux))
fbac0812 368 goto leave;
0efba16c 369
fbac0812
SO		 370 ret = len;
371leave:
372 mutex_unlock(&chip->lock);
373 return ret;
0efba16c
SO		 374}
375
376#define store_leds(nr) \
377static ssize_t store_engine##nr##_leds(struct device *dev, \
378 struct device_attribute *attr, \
379 const char *buf, size_t len) \
380{ \
381 return store_engine_leds(dev, attr, buf, len, nr); \
382}
383store_leds(1)
384store_leds(2)
385store_leds(3)
386
387static ssize_t lp5523_selftest(struct device *dev,
388 struct device_attribute *attr,
389 char *buf)
390{
391 struct i2c_client *client = to_i2c_client(dev);
392 struct lp5523_chip *chip = i2c_get_clientdata(client);
393 int i, ret, pos = 0;
394 int led = 0;
395 u8 status, adc, vdd;
396
397 mutex_lock(&chip->lock);
398
399 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
400 if (ret < 0)
401 goto fail;
402
403 /* Check that ext clock is really in use if requested */
404 if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT))
405 if ((status & LP5523_EXT_CLK_USED) == 0)
406 goto fail;
407
408 /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
409 lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL,
410 LP5523_EN_LEDTEST | 16);
2e4840ed 411 usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
0efba16c 412 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
1b21ec5a
JH		 413 if (ret < 0)
414 goto fail;
415
0efba16c 416 if (!(status & LP5523_LEDTEST_DONE))
2e4840ed 417 usleep_range(3000, 6000); /* Was not ready. Wait little bit */
0efba16c 418
1b21ec5a
JH		 419 ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd);
420 if (ret < 0)
421 goto fail;
422
0efba16c
SO		 423 vdd--; /* There may be some fluctuation in measurement */
424
0e202346 425 for (i = 0; i < LP5523_MAX_LEDS; i++) {
0efba16c
SO		 426 /* Skip non-existing channels */
427 if (chip->pdata->led_config[i].led_current == 0)
428 continue;
429
430 /* Set default current */
431 lp5523_write(chip->client,
432 LP5523_REG_LED_CURRENT_BASE + i,
433 chip->pdata->led_config[i].led_current);
434
435 lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff);
2e4840ed
SO		 436 /* let current stabilize 2 - 4ms before measurements start */
437 usleep_range(2000, 4000);
0efba16c
SO		 438 lp5523_write(chip->client,
439 LP5523_REG_LED_TEST_CTRL,
440 LP5523_EN_LEDTEST | i);
2e4840ed
SO		 441 /* ADC conversion time is 2.7 ms typically */
442 usleep_range(3000, 6000);
0efba16c 443 ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
1b21ec5a
JH		 444 if (ret < 0)
445 goto fail;
446
0efba16c 447 if (!(status & LP5523_LEDTEST_DONE))
2e4840ed 448 usleep_range(3000, 6000);/* Was not ready. Wait. */
1b21ec5a
JH		 449 ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc);
450 if (ret < 0)
451 goto fail;
0efba16c
SO		 452
453 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
454 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
455
456 lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00);
457
458 /* Restore current */
459 lp5523_write(chip->client,
460 LP5523_REG_LED_CURRENT_BASE + i,
461 chip->leds[led].led_current);
462 led++;
463 }
464 if (pos == 0)
465 pos = sprintf(buf, "OK\n");
466 goto release_lock;
467fail:
468 pos = sprintf(buf, "FAIL\n");
469
470release_lock:
471 mutex_unlock(&chip->lock);
472
473 return pos;
474}
475
0efba16c
SO		 476static void lp5523_led_brightness_work(struct work_struct *work)
477{
a6e4679a 478 struct lp55xx_led *led = container_of(work, struct lp55xx_led,
0efba16c 479 brightness_work);
a6e4679a 480 struct lp55xx_chip *chip = led->chip;
0efba16c
SO		 481
482 mutex_lock(&chip->lock);
a6e4679a 483 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
0efba16c 484 led->brightness);
0efba16c
SO		 485 mutex_unlock(&chip->lock);
486}
487
488static int lp5523_do_store_load(struct lp5523_engine *engine,
489 const char *buf, size_t len)
490{
491 struct lp5523_chip *chip = engine_to_lp5523(engine);
492 struct i2c_client *client = chip->client;
493 int ret, nrchars, offset = 0, i = 0;
494 char c[3];
495 unsigned cmd;
496 u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
497
469eba02
KM		 498 if (engine->mode != LP5523_CMD_LOAD)
499 return -EINVAL;
500
0efba16c
SO		 501 while ((offset < len - 1) && (i < LP5523_PROGRAM_LENGTH)) {
502 /* separate sscanfs because length is working only for %s */
503 ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
504 ret = sscanf(c, "%2x", &cmd);
505 if (ret != 1)
506 goto fail;
507 pattern[i] = (u8)cmd;
508
509 offset += nrchars;
510 i++;
511 }
512
513 /* Each instruction is 16bit long. Check that length is even */
514 if (i % 2)
515 goto fail;
516
517 mutex_lock(&chip->lock);
469eba02 518 ret = lp5523_load_program(engine, pattern);
0efba16c
SO		 519 mutex_unlock(&chip->lock);
520
521 if (ret) {
522 dev_err(&client->dev, "failed loading pattern\n");
523 return ret;
524 }
525
526 return len;
527fail:
528 dev_err(&client->dev, "wrong pattern format\n");
529 return -EINVAL;
530}
531
532static ssize_t store_engine_load(struct device *dev,
533 struct device_attribute *attr,
534 const char *buf, size_t len, int nr)
535{
536 struct i2c_client *client = to_i2c_client(dev);
537 struct lp5523_chip *chip = i2c_get_clientdata(client);
538 return lp5523_do_store_load(&chip->engines[nr - 1], buf, len);
539}
540
541#define store_load(nr) \
542static ssize_t store_engine##nr##_load(struct device *dev, \
543 struct device_attribute *attr, \
544 const char *buf, size_t len) \
545{ \
546 return store_engine_load(dev, attr, buf, len, nr); \
547}
548store_load(1)
549store_load(2)
550store_load(3)
551
552static ssize_t show_engine_mode(struct device *dev,
553 struct device_attribute *attr,
554 char *buf, int nr)
555{
556 struct i2c_client *client = to_i2c_client(dev);
557 struct lp5523_chip *chip = i2c_get_clientdata(client);
558 switch (chip->engines[nr - 1].mode) {
559 case LP5523_CMD_RUN:
560 return sprintf(buf, "run\n");
561 case LP5523_CMD_LOAD:
562 return sprintf(buf, "load\n");
563 case LP5523_CMD_DISABLED:
564 return sprintf(buf, "disabled\n");
565 default:
566 return sprintf(buf, "disabled\n");
567 }
568}
569
570#define show_mode(nr) \
571static ssize_t show_engine##nr##_mode(struct device *dev, \
572 struct device_attribute *attr, \
573 char *buf) \
574{ \
575 return show_engine_mode(dev, attr, buf, nr); \
576}
577show_mode(1)
578show_mode(2)
579show_mode(3)
580
581static ssize_t store_engine_mode(struct device *dev,
582 struct device_attribute *attr,
583 const char *buf, size_t len, int nr)
584{
585 struct i2c_client *client = to_i2c_client(dev);
586 struct lp5523_chip *chip = i2c_get_clientdata(client);
587 struct lp5523_engine *engine = &chip->engines[nr - 1];
588 mutex_lock(&chip->lock);
589
590 if (!strncmp(buf, "run", 3))
591 lp5523_set_mode(engine, LP5523_CMD_RUN);
592 else if (!strncmp(buf, "load", 4))
593 lp5523_set_mode(engine, LP5523_CMD_LOAD);
594 else if (!strncmp(buf, "disabled", 8))
595 lp5523_set_mode(engine, LP5523_CMD_DISABLED);
596
597 mutex_unlock(&chip->lock);
598 return len;
599}
600
601#define store_mode(nr) \
602static ssize_t store_engine##nr##_mode(struct device *dev, \
603 struct device_attribute *attr, \
604 const char *buf, size_t len) \
605{ \
606 return store_engine_mode(dev, attr, buf, len, nr); \
607}
608store_mode(1)
609store_mode(2)
610store_mode(3)
611
0efba16c 612/* device attributes */
ccd7510f 613static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
0efba16c 614 show_engine1_mode, store_engine1_mode);
ccd7510f 615static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
0efba16c 616 show_engine2_mode, store_engine2_mode);
ccd7510f 617static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
0efba16c 618 show_engine3_mode, store_engine3_mode);
ccd7510f 619static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUSR,
0efba16c 620 show_engine1_leds, store_engine1_leds);
ccd7510f 621static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUSR,
0efba16c 622 show_engine2_leds, store_engine2_leds);
ccd7510f 623static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUSR,
0efba16c 624 show_engine3_leds, store_engine3_leds);
ccd7510f
VK		 625static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
626static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
627static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
0efba16c
SO		 628static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
629
630static struct attribute *lp5523_attributes[] = {
631 &dev_attr_engine1_mode.attr,
632 &dev_attr_engine2_mode.attr,
633 &dev_attr_engine3_mode.attr,
634 &dev_attr_selftest.attr,
0efba16c
SO		 635 &dev_attr_engine1_load.attr,
636 &dev_attr_engine1_leds.attr,
0efba16c
SO		 637 &dev_attr_engine2_load.attr,
638 &dev_attr_engine2_leds.attr,
0efba16c
SO		 639 &dev_attr_engine3_load.attr,
640 &dev_attr_engine3_leds.attr,
f1625842 641 NULL,
0efba16c
SO		 642};
643
644static const struct attribute_group lp5523_group = {
645 .attrs = lp5523_attributes,
646};
647
0efba16c
SO		 648static int lp5523_register_sysfs(struct i2c_client *client)
649{
650 struct device *dev = &client->dev;
651 int ret;
652
653 ret = sysfs_create_group(&dev->kobj, &lp5523_group);
654 if (ret < 0)
655 return ret;
656
657 return 0;
658}
659
660static void lp5523_unregister_sysfs(struct i2c_client *client)
661{
0efba16c 662 struct device *dev = &client->dev;
0efba16c
SO		 663
664 sysfs_remove_group(&dev->kobj, &lp5523_group);
0efba16c
SO		 665}
666
667/*--------------------------------------------------------------*/
668/* Set chip operating mode */
669/*--------------------------------------------------------------*/
6f6365fb 670static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
0efba16c 671{
0efba16c
SO		 672 /* if in that mode already do nothing, except for run */
673 if (mode == engine->mode && mode != LP5523_CMD_RUN)
6f6365fb 674 return;
0efba16c 675
6f6365fb
KM		 676 switch (mode) {
677 case LP5523_CMD_RUN:
678 lp5523_run_program(engine);
679 break;
680 case LP5523_CMD_LOAD:
0efba16c
SO		 681 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
682 lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
6f6365fb
KM		 683 break;
684 case LP5523_CMD_DISABLED:
0efba16c 685 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
6f6365fb
KM		 686 break;
687 default:
688 return;
0efba16c
SO		 689 }
690
0efba16c 691 engine->mode = mode;
0efba16c
SO		 692}
693
694/*--------------------------------------------------------------*/
695/* Probe, Attach, Remove */
696/*--------------------------------------------------------------*/
48068d5d
MWK		 697/* Chip specific configurations */
698static struct lp55xx_device_config lp5523_cfg = {
699 .reset = {
700 .addr = LP5523_REG_RESET,
701 .val = LP5523_RESET,
702 },
e3a700d8
MWK		 703 .enable = {
704 .addr = LP5523_REG_ENABLE,
705 .val = LP5523_ENABLE,
706 },
0e202346 707 .max_channel = LP5523_MAX_LEDS,
ffbdccdb 708 .post_init_device = lp5523_post_init_device,
a6e4679a 709 .brightness_work_fn = lp5523_led_brightness_work,
a96bfa13 710 .set_led_current = lp5523_set_led_current,
48068d5d
MWK		 711};
712
98ea1ea2 713static int lp5523_probe(struct i2c_client *client,
0efba16c
SO		 714 const struct i2c_device_id *id)
715{
22ebeb48 716 int ret;
6a0c9a47
MWK		 717 struct lp55xx_chip *chip;
718 struct lp55xx_led *led;
719 struct lp55xx_platform_data *pdata = client->dev.platform_data;
0efba16c 720
6a0c9a47 721 if (!pdata) {
0efba16c 722 dev_err(&client->dev, "no platform data\n");
94ca4bcc 723 return -EINVAL;
0efba16c
SO		 724 }
725
6a0c9a47
MWK		 726 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
727 if (!chip)
728 return -ENOMEM;
729
730 led = devm_kzalloc(&client->dev,
731 sizeof(*led) * pdata->num_channels, GFP_KERNEL);
732 if (!led)
733 return -ENOMEM;
734
735 chip->cl = client;
736 chip->pdata = pdata;
48068d5d 737 chip->cfg = &lp5523_cfg;
6a0c9a47
MWK		 738
739 mutex_init(&chip->lock);
0efba16c 740
6a0c9a47 741 i2c_set_clientdata(client, led);
0efba16c 742
22ebeb48 743 ret = lp55xx_init_device(chip);
0efba16c 744 if (ret)
f6c64c6f 745 goto err_init;
0efba16c 746
56a1e9ad 747 dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
0efba16c 748
9e9b3db1 749 ret = lp55xx_register_leds(led, chip);
f6524808 750 if (ret)
9e9b3db1 751 goto err_register_leds;
0efba16c
SO		 752
753 ret = lp5523_register_sysfs(client);
754 if (ret) {
755 dev_err(&client->dev, "registering sysfs failed\n");
94ca4bcc 756 goto fail2;
0efba16c
SO		 757 }
758 return ret;
94ca4bcc 759fail2:
c3a68ebf 760 lp55xx_unregister_leds(led, chip);
9e9b3db1 761err_register_leds:
6ce61762 762 lp55xx_deinit_device(chip);
f6c64c6f 763err_init:
0efba16c
SO		 764 return ret;
765}
766
767static int lp5523_remove(struct i2c_client *client)
768{
6ce61762
MWK		 769 struct lp55xx_led *led = i2c_get_clientdata(client);
770 struct lp55xx_chip *chip = led->chip;
0efba16c 771
23301b7f
KM		 772 /* Disable engine mode */
773 lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
774
0efba16c
SO		 775 lp5523_unregister_sysfs(client);
776
c3a68ebf 777 lp55xx_unregister_leds(led, chip);
6ce61762 778 lp55xx_deinit_device(chip);
0efba16c 779
0efba16c
SO		 780 return 0;
781}
782
783static const struct i2c_device_id lp5523_id[] = {
27d7704e
KM		 784 { "lp5523", LP5523 },
785 { "lp55231", LP55231 },
0efba16c
SO		 786 { }
787};
788
789MODULE_DEVICE_TABLE(i2c, lp5523_id);
790
791static struct i2c_driver lp5523_driver = {
792 .driver = {
27d7704e 793 .name = "lp5523x",
0efba16c
SO		 794 },
795 .probe = lp5523_probe,
796 .remove = lp5523_remove,
797 .id_table = lp5523_id,
798};
799
09a0d183 800module_i2c_driver(lp5523_driver);
0efba16c
SO		 801
802MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
803MODULE_DESCRIPTION("LP5523 LED engine");
804MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)