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12#include <linux/delay.h>
13#include <linux/firmware.h>
14#include <linux/i2c.h>
15#include <linux/leds.h>
16#include <linux/module.h>
17#include <linux/mutex.h>
18#include <linux/of.h>
19#include <linux/platform_data/leds-lp55xx.h>
20#include <linux/slab.h>
21
22#include "leds-lp55xx-common.h"
23
24#define LP5523_PROGRAM_LENGTH 32
25
26
27
28
29
30
31
32
33#define LP5523_MAX_LEDS 9
34
35
36#define LP5523_REG_ENABLE 0x00
37#define LP5523_REG_OP_MODE 0x01
38#define LP5523_REG_ENABLE_LEDS_MSB 0x04
39#define LP5523_REG_ENABLE_LEDS_LSB 0x05
40#define LP5523_REG_LED_CTRL_BASE 0x06
41#define LP5523_REG_LED_PWM_BASE 0x16
42#define LP5523_REG_LED_CURRENT_BASE 0x26
43#define LP5523_REG_CONFIG 0x36
44#define LP5523_REG_STATUS 0x3A
45#define LP5523_REG_RESET 0x3D
46#define LP5523_REG_LED_TEST_CTRL 0x41
47#define LP5523_REG_LED_TEST_ADC 0x42
48#define LP5523_REG_MASTER_FADER_BASE 0x48
49#define LP5523_REG_CH1_PROG_START 0x4C
50#define LP5523_REG_CH2_PROG_START 0x4D
51#define LP5523_REG_CH3_PROG_START 0x4E
52#define LP5523_REG_PROG_PAGE_SEL 0x4F
53#define LP5523_REG_PROG_MEM 0x50
54
55
56#define LP5523_ENABLE 0x40
57#define LP5523_AUTO_INC 0x40
58#define LP5523_PWR_SAVE 0x20
59#define LP5523_PWM_PWR_SAVE 0x04
60#define LP5523_CP_AUTO 0x18
61#define LP5523_AUTO_CLK 0x02
62
63#define LP5523_EN_LEDTEST 0x80
64#define LP5523_LEDTEST_DONE 0x80
65#define LP5523_RESET 0xFF
66#define LP5523_ADC_SHORTCIRC_LIM 80
67#define LP5523_EXT_CLK_USED 0x08
68#define LP5523_ENG_STATUS_MASK 0x07
69
70#define LP5523_FADER_MAPPING_MASK 0xC0
71#define LP5523_FADER_MAPPING_SHIFT 6
72
73
74#define LP5523_PAGE_ENG1 0
75#define LP5523_PAGE_ENG2 1
76#define LP5523_PAGE_ENG3 2
77#define LP5523_PAGE_MUX1 3
78#define LP5523_PAGE_MUX2 4
79#define LP5523_PAGE_MUX3 5
80
81
82#define LP5523_MODE_ENG1_M 0x30
83#define LP5523_MODE_ENG2_M 0x0C
84#define LP5523_MODE_ENG3_M 0x03
85#define LP5523_LOAD_ENG1 0x10
86#define LP5523_LOAD_ENG2 0x04
87#define LP5523_LOAD_ENG3 0x01
88
89#define LP5523_ENG1_IS_LOADING(mode) \
90 ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
91#define LP5523_ENG2_IS_LOADING(mode) \
92 ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
93#define LP5523_ENG3_IS_LOADING(mode) \
94 ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
95
96#define LP5523_EXEC_ENG1_M 0x30
97#define LP5523_EXEC_ENG2_M 0x0C
98#define LP5523_EXEC_ENG3_M 0x03
99#define LP5523_EXEC_M 0x3F
100#define LP5523_RUN_ENG1 0x20
101#define LP5523_RUN_ENG2 0x08
102#define LP5523_RUN_ENG3 0x02
103
104#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
105
106enum lp5523_chip_id {
107 LP5523,
108 LP55231,
109};
110
111static int lp5523_init_program_engine(struct lp55xx_chip *chip);
112
113static inline void lp5523_wait_opmode_done(void)
114{
115 usleep_range(1000, 2000);
116}
117
118static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
119{
120 led->led_current = led_current;
121 lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
122 led_current);
123}
124
125static int lp5523_post_init_device(struct lp55xx_chip *chip)
126{
127 int ret;
128
129 ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
130 if (ret)
131 return ret;
132
133
134 usleep_range(1000, 2000);
135
136 ret = lp55xx_write(chip, LP5523_REG_CONFIG,
137 LP5523_AUTO_INC | LP5523_PWR_SAVE |
138 LP5523_CP_AUTO | LP5523_AUTO_CLK |
139 LP5523_PWM_PWR_SAVE);
140 if (ret)
141 return ret;
142
143
144 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
145 if (ret)
146 return ret;
147
148 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
149 if (ret)
150 return ret;
151
152 return lp5523_init_program_engine(chip);
153}
154
155static void lp5523_load_engine(struct lp55xx_chip *chip)
156{
157 enum lp55xx_engine_index idx = chip->engine_idx;
158 static const u8 mask[] = {
159 [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
160 [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
161 [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
162 };
163
164 static const u8 val[] = {
165 [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
166 [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
167 [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
168 };
169
170 lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
171
172 lp5523_wait_opmode_done();
173}
174
175static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
176{
177 enum lp55xx_engine_index idx = chip->engine_idx;
178 static const u8 page_sel[] = {
179 [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
180 [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
181 [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
182 };
183
184 lp5523_load_engine(chip);
185
186 lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
187}
188
189static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
190{
191 lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
192 lp5523_wait_opmode_done();
193}
194
195static void lp5523_stop_engine(struct lp55xx_chip *chip)
196{
197 enum lp55xx_engine_index idx = chip->engine_idx;
198 static const u8 mask[] = {
199 [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
200 [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
201 [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
202 };
203
204 lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
205
206 lp5523_wait_opmode_done();
207}
208
209static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
210{
211 int i;
212
213 for (i = 0; i < LP5523_MAX_LEDS; i++)
214 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
215}
216
217static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
218{
219 int ret;
220 u8 mode;
221 u8 exec;
222
223
224 if (!start) {
225 lp5523_stop_engine(chip);
226 lp5523_turn_off_channels(chip);
227 return;
228 }
229
230
231
232
233
234
235 ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
236 if (ret)
237 return;
238
239 ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
240 if (ret)
241 return;
242
243
244 if (LP5523_ENG1_IS_LOADING(mode)) {
245 mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
246 exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
247 }
248
249 if (LP5523_ENG2_IS_LOADING(mode)) {
250 mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
251 exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
252 }
253
254 if (LP5523_ENG3_IS_LOADING(mode)) {
255 mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
256 exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
257 }
258
259 lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
260 lp5523_wait_opmode_done();
261
262 lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
263}
264
265static int lp5523_init_program_engine(struct lp55xx_chip *chip)
266{
267 int i;
268 int j;
269 int ret;
270 u8 status;
271
272 static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
273 { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
274 { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
275 { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
276 };
277
278
279 ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00);
280 if (ret)
281 return ret;
282
283 ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10);
284 if (ret)
285 return ret;
286
287 ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20);
288 if (ret)
289 return ret;
290
291
292 for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
293 chip->engine_idx = i;
294 lp5523_load_engine_and_select_page(chip);
295
296 for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) {
297 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
298 pattern[i - 1][j]);
299 if (ret)
300 goto out;
301 }
302 }
303
304 lp5523_run_engine(chip, true);
305
306
307 usleep_range(3000, 6000);
308 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
309 if (ret)
310 return ret;
311 status &= LP5523_ENG_STATUS_MASK;
312
313 if (status != LP5523_ENG_STATUS_MASK) {
314 dev_err(&chip->cl->dev,
315 "could not configure LED engine, status = 0x%.2x\n",
316 status);
317 ret = -1;
318 }
319
320out:
321 lp5523_stop_all_engines(chip);
322 return ret;
323}
324
325static int lp5523_update_program_memory(struct lp55xx_chip *chip,
326 const u8 *data, size_t size)
327{
328 u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
329 unsigned int cmd;
330 char c[3];
331 int nrchars;
332 int ret;
333 int offset = 0;
334 int i = 0;
335
336 while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
337
338 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
339 if (ret != 1)
340 goto err;
341
342 ret = sscanf(c, "%2x", &cmd);
343 if (ret != 1)
344 goto err;
345
346 pattern[i] = (u8)cmd;
347 offset += nrchars;
348 i++;
349 }
350
351
352 if (i % 2)
353 goto err;
354
355 for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) {
356 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
357 if (ret)
358 return -EINVAL;
359 }
360
361 return size;
362
363err:
364 dev_err(&chip->cl->dev, "wrong pattern format\n");
365 return -EINVAL;
366}
367
368static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
369{
370 const struct firmware *fw = chip->fw;
371
372 if (fw->size > LP5523_PROGRAM_LENGTH) {
373 dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
374 fw->size);
375 return;
376 }
377
378
379
380
381
382
383
384 lp5523_load_engine_and_select_page(chip);
385 lp5523_update_program_memory(chip, fw->data, fw->size);
386}
387
388static ssize_t show_engine_mode(struct device *dev,
389 struct device_attribute *attr,
390 char *buf, int nr)
391{
392 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
393 struct lp55xx_chip *chip = led->chip;
394 enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
395
396 switch (mode) {
397 case LP55XX_ENGINE_RUN:
398 return sprintf(buf, "run\n");
399 case LP55XX_ENGINE_LOAD:
400 return sprintf(buf, "load\n");
401 case LP55XX_ENGINE_DISABLED:
402 default:
403 return sprintf(buf, "disabled\n");
404 }
405}
406show_mode(1)
407show_mode(2)
408show_mode(3)
409
410static ssize_t store_engine_mode(struct device *dev,
411 struct device_attribute *attr,
412 const char *buf, size_t len, int nr)
413{
414 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
415 struct lp55xx_chip *chip = led->chip;
416 struct lp55xx_engine *engine = &chip->engines[nr - 1];
417
418 mutex_lock(&chip->lock);
419
420 chip->engine_idx = nr;
421
422 if (!strncmp(buf, "run", 3)) {
423 lp5523_run_engine(chip, true);
424 engine->mode = LP55XX_ENGINE_RUN;
425 } else if (!strncmp(buf, "load", 4)) {
426 lp5523_stop_engine(chip);
427 lp5523_load_engine(chip);
428 engine->mode = LP55XX_ENGINE_LOAD;
429 } else if (!strncmp(buf, "disabled", 8)) {
430 lp5523_stop_engine(chip);
431 engine->mode = LP55XX_ENGINE_DISABLED;
432 }
433
434 mutex_unlock(&chip->lock);
435
436 return len;
437}
438store_mode(1)
439store_mode(2)
440store_mode(3)
441
442static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
443{
444 u16 tmp_mux = 0;
445 int i;
446
447 len = min_t(int, len, LP5523_MAX_LEDS);
448
449 for (i = 0; i < len; i++) {
450 switch (buf[i]) {
451 case '1':
452 tmp_mux |= (1 << i);
453 break;
454 case '0':
455 break;
456 case '\n':
457 i = len;
458 break;
459 default:
460 return -1;
461 }
462 }
463 *mux = tmp_mux;
464
465 return 0;
466}
467
468static void lp5523_mux_to_array(u16 led_mux, char *array)
469{
470 int i, pos = 0;
471
472 for (i = 0; i < LP5523_MAX_LEDS; i++)
473 pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
474
475 array[pos] = '\0';
476}
477
478static ssize_t show_engine_leds(struct device *dev,
479 struct device_attribute *attr,
480 char *buf, int nr)
481{
482 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
483 struct lp55xx_chip *chip = led->chip;
484 char mux[LP5523_MAX_LEDS + 1];
485
486 lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
487
488 return sprintf(buf, "%s\n", mux);
489}
490show_leds(1)
491show_leds(2)
492show_leds(3)
493
494static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
495{
496 struct lp55xx_engine *engine = &chip->engines[nr - 1];
497 int ret;
498 static const u8 mux_page[] = {
499 [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
500 [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
501 [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
502 };
503
504 lp5523_load_engine(chip);
505
506 ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
507 if (ret)
508 return ret;
509
510 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8));
511 if (ret)
512 return ret;
513
514 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
515 if (ret)
516 return ret;
517
518 engine->led_mux = mux;
519 return 0;
520}
521
522static ssize_t store_engine_leds(struct device *dev,
523 struct device_attribute *attr,
524 const char *buf, size_t len, int nr)
525{
526 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
527 struct lp55xx_chip *chip = led->chip;
528 struct lp55xx_engine *engine = &chip->engines[nr - 1];
529 u16 mux = 0;
530 ssize_t ret;
531
532 if (lp5523_mux_parse(buf, &mux, len))
533 return -EINVAL;
534
535 mutex_lock(&chip->lock);
536
537 chip->engine_idx = nr;
538 ret = -EINVAL;
539
540 if (engine->mode != LP55XX_ENGINE_LOAD)
541 goto leave;
542
543 if (lp5523_load_mux(chip, mux, nr))
544 goto leave;
545
546 ret = len;
547leave:
548 mutex_unlock(&chip->lock);
549 return ret;
550}
551store_leds(1)
552store_leds(2)
553store_leds(3)
554
555static ssize_t store_engine_load(struct device *dev,
556 struct device_attribute *attr,
557 const char *buf, size_t len, int nr)
558{
559 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
560 struct lp55xx_chip *chip = led->chip;
561 int ret;
562
563 mutex_lock(&chip->lock);
564
565 chip->engine_idx = nr;
566 lp5523_load_engine_and_select_page(chip);
567 ret = lp5523_update_program_memory(chip, buf, len);
568
569 mutex_unlock(&chip->lock);
570
571 return ret;
572}
573store_load(1)
574store_load(2)
575store_load(3)
576
577static ssize_t lp5523_selftest(struct device *dev,
578 struct device_attribute *attr,
579 char *buf)
580{
581 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
582 struct lp55xx_chip *chip = led->chip;
583 struct lp55xx_platform_data *pdata = chip->pdata;
584 int i, ret, pos = 0;
585 u8 status, adc, vdd;
586
587 mutex_lock(&chip->lock);
588
589 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
590 if (ret < 0)
591 goto fail;
592
593
594 if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
595 if ((status & LP5523_EXT_CLK_USED) == 0)
596 goto fail;
597 }
598
599
600 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
601 usleep_range(3000, 6000);
602 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
603 if (ret < 0)
604 goto fail;
605
606 if (!(status & LP5523_LEDTEST_DONE))
607 usleep_range(3000, 6000);
608
609 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
610 if (ret < 0)
611 goto fail;
612
613 vdd--;
614
615 for (i = 0; i < LP5523_MAX_LEDS; i++) {
616
617 if (pdata->led_config[i].led_current == 0)
618 continue;
619
620
621 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
622 pdata->led_config[i].led_current);
623
624 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
625
626 usleep_range(2000, 4000);
627 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
628 LP5523_EN_LEDTEST | i);
629
630 usleep_range(3000, 6000);
631 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
632 if (ret < 0)
633 goto fail;
634
635 if (!(status & LP5523_LEDTEST_DONE))
636 usleep_range(3000, 6000);
637
638 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
639 if (ret < 0)
640 goto fail;
641
642 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
643 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
644
645 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
646
647
648 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
649 led->led_current);
650 led++;
651 }
652 if (pos == 0)
653 pos = sprintf(buf, "OK\n");
654 goto release_lock;
655fail:
656 pos = sprintf(buf, "FAIL\n");
657
658release_lock:
659 mutex_unlock(&chip->lock);
660
661 return pos;
662}
663
664#define show_fader(nr) \
665static ssize_t show_master_fader##nr(struct device *dev, \
666 struct device_attribute *attr, \
667 char *buf) \
668{ \
669 return show_master_fader(dev, attr, buf, nr); \
670}
671
672#define store_fader(nr) \
673static ssize_t store_master_fader##nr(struct device *dev, \
674 struct device_attribute *attr, \
675 const char *buf, size_t len) \
676{ \
677 return store_master_fader(dev, attr, buf, len, nr); \
678}
679
680static ssize_t show_master_fader(struct device *dev,
681 struct device_attribute *attr,
682 char *buf, int nr)
683{
684 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
685 struct lp55xx_chip *chip = led->chip;
686 int ret;
687 u8 val;
688
689 mutex_lock(&chip->lock);
690 ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
691 mutex_unlock(&chip->lock);
692
693 if (ret == 0)
694 ret = sprintf(buf, "%u\n", val);
695
696 return ret;
697}
698show_fader(1)
699show_fader(2)
700show_fader(3)
701
702static ssize_t store_master_fader(struct device *dev,
703 struct device_attribute *attr,
704 const char *buf, size_t len, int nr)
705{
706 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
707 struct lp55xx_chip *chip = led->chip;
708 int ret;
709 unsigned long val;
710
711 if (kstrtoul(buf, 0, &val))
712 return -EINVAL;
713
714 if (val > 0xff)
715 return -EINVAL;
716
717 mutex_lock(&chip->lock);
718 ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
719 (u8)val);
720 mutex_unlock(&chip->lock);
721
722 if (ret == 0)
723 ret = len;
724
725 return ret;
726}
727store_fader(1)
728store_fader(2)
729store_fader(3)
730
731static ssize_t show_master_fader_leds(struct device *dev,
732 struct device_attribute *attr,
733 char *buf)
734{
735 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
736 struct lp55xx_chip *chip = led->chip;
737 int i, ret, pos = 0;
738 u8 val;
739
740 mutex_lock(&chip->lock);
741
742 for (i = 0; i < LP5523_MAX_LEDS; i++) {
743 ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
744 if (ret)
745 goto leave;
746
747 val = (val & LP5523_FADER_MAPPING_MASK)
748 >> LP5523_FADER_MAPPING_SHIFT;
749 if (val > 3) {
750 ret = -EINVAL;
751 goto leave;
752 }
753 buf[pos++] = val + '0';
754 }
755 buf[pos++] = '\n';
756 ret = pos;
757leave:
758 mutex_unlock(&chip->lock);
759 return ret;
760}
761
762static ssize_t store_master_fader_leds(struct device *dev,
763 struct device_attribute *attr,
764 const char *buf, size_t len)
765{
766 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
767 struct lp55xx_chip *chip = led->chip;
768 int i, n, ret;
769 u8 val;
770
771 n = min_t(int, len, LP5523_MAX_LEDS);
772
773 mutex_lock(&chip->lock);
774
775 for (i = 0; i < n; i++) {
776 if (buf[i] >= '0' && buf[i] <= '3') {
777 val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
778 ret = lp55xx_update_bits(chip,
779 LP5523_REG_LED_CTRL_BASE + i,
780 LP5523_FADER_MAPPING_MASK,
781 val);
782 if (ret)
783 goto leave;
784 } else {
785 ret = -EINVAL;
786 goto leave;
787 }
788 }
789 ret = len;
790leave:
791 mutex_unlock(&chip->lock);
792 return ret;
793}
794
795static int lp5523_multicolor_brightness(struct lp55xx_led *led)
796{
797 struct lp55xx_chip *chip = led->chip;
798 int ret;
799 int i;
800
801 mutex_lock(&chip->lock);
802 for (i = 0; i < led->mc_cdev.num_colors; i++) {
803 ret = lp55xx_write(chip,
804 LP5523_REG_LED_PWM_BASE +
805 led->mc_cdev.subled_info[i].channel,
806 led->mc_cdev.subled_info[i].brightness);
807 if (ret)
808 break;
809 }
810 mutex_unlock(&chip->lock);
811 return ret;
812}
813
814static int lp5523_led_brightness(struct lp55xx_led *led)
815{
816 struct lp55xx_chip *chip = led->chip;
817 int ret;
818
819 mutex_lock(&chip->lock);
820 ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
821 led->brightness);
822 mutex_unlock(&chip->lock);
823 return ret;
824}
825
826static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
827static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
828static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
829static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
830static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
831static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
832static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
833static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
834static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
835static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
836static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
837 store_master_fader1);
838static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
839 store_master_fader2);
840static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
841 store_master_fader3);
842static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
843 store_master_fader_leds);
844
845static struct attribute *lp5523_attributes[] = {
846 &dev_attr_engine1_mode.attr,
847 &dev_attr_engine2_mode.attr,
848 &dev_attr_engine3_mode.attr,
849 &dev_attr_engine1_load.attr,
850 &dev_attr_engine2_load.attr,
851 &dev_attr_engine3_load.attr,
852 &dev_attr_engine1_leds.attr,
853 &dev_attr_engine2_leds.attr,
854 &dev_attr_engine3_leds.attr,
855 &dev_attr_selftest.attr,
856 &dev_attr_master_fader1.attr,
857 &dev_attr_master_fader2.attr,
858 &dev_attr_master_fader3.attr,
859 &dev_attr_master_fader_leds.attr,
860 NULL,
861};
862
863static const struct attribute_group lp5523_group = {
864 .attrs = lp5523_attributes,
865};
866
867
868static struct lp55xx_device_config lp5523_cfg = {
869 .reset = {
870 .addr = LP5523_REG_RESET,
871 .val = LP5523_RESET,
872 },
873 .enable = {
874 .addr = LP5523_REG_ENABLE,
875 .val = LP5523_ENABLE,
876 },
877 .max_channel = LP5523_MAX_LEDS,
878 .post_init_device = lp5523_post_init_device,
879 .brightness_fn = lp5523_led_brightness,
880 .multicolor_brightness_fn = lp5523_multicolor_brightness,
881 .set_led_current = lp5523_set_led_current,
882 .firmware_cb = lp5523_firmware_loaded,
883 .run_engine = lp5523_run_engine,
884 .dev_attr_group = &lp5523_group,
885};
886
887static int lp5523_probe(struct i2c_client *client,
888 const struct i2c_device_id *id)
889{
890 int ret;
891 struct lp55xx_chip *chip;
892 struct lp55xx_led *led;
893 struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
894 struct device_node *np = dev_of_node(&client->dev);
895
896 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
897 if (!chip)
898 return -ENOMEM;
899
900 chip->cfg = &lp5523_cfg;
901
902 if (!pdata) {
903 if (np) {
904 pdata = lp55xx_of_populate_pdata(&client->dev, np,
905 chip);
906 if (IS_ERR(pdata))
907 return PTR_ERR(pdata);
908 } else {
909 dev_err(&client->dev, "no platform data\n");
910 return -EINVAL;
911 }
912 }
913
914 led = devm_kcalloc(&client->dev,
915 pdata->num_channels, sizeof(*led), GFP_KERNEL);
916 if (!led)
917 return -ENOMEM;
918
919 chip->cl = client;
920 chip->pdata = pdata;
921
922 mutex_init(&chip->lock);
923
924 i2c_set_clientdata(client, led);
925
926 ret = lp55xx_init_device(chip);
927 if (ret)
928 goto err_init;
929
930 dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
931
932 ret = lp55xx_register_leds(led, chip);
933 if (ret)
934 goto err_out;
935
936 ret = lp55xx_register_sysfs(chip);
937 if (ret) {
938 dev_err(&client->dev, "registering sysfs failed\n");
939 goto err_out;
940 }
941
942 return 0;
943
944err_out:
945 lp55xx_deinit_device(chip);
946err_init:
947 return ret;
948}
949
950static int lp5523_remove(struct i2c_client *client)
951{
952 struct lp55xx_led *led = i2c_get_clientdata(client);
953 struct lp55xx_chip *chip = led->chip;
954
955 lp5523_stop_all_engines(chip);
956 lp55xx_unregister_sysfs(chip);
957 lp55xx_deinit_device(chip);
958
959 return 0;
960}
961
962static const struct i2c_device_id lp5523_id[] = {
963 { "lp5523", LP5523 },
964 { "lp55231", LP55231 },
965 { }
966};
967
968MODULE_DEVICE_TABLE(i2c, lp5523_id);
969
970#ifdef CONFIG_OF
971static const struct of_device_id of_lp5523_leds_match[] = {
972 { .compatible = "national,lp5523", },
973 { .compatible = "ti,lp55231", },
974 {},
975};
976
977MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
978#endif
979
980static struct i2c_driver lp5523_driver = {
981 .driver = {
982 .name = "lp5523x",
983 .of_match_table = of_match_ptr(of_lp5523_leds_match),
984 },
985 .probe = lp5523_probe,
986 .remove = lp5523_remove,
987 .id_table = lp5523_id,
988};
989
990module_i2c_driver(lp5523_driver);
991
992MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
993MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
994MODULE_DESCRIPTION("LP5523 LED engine");
995MODULE_LICENSE("GPL");
996
