This source file includes following definitions.
- lp5523_wait_opmode_done
- lp5523_set_led_current
- lp5523_post_init_device
- lp5523_load_engine
- lp5523_load_engine_and_select_page
- lp5523_stop_all_engines
- lp5523_stop_engine
- lp5523_turn_off_channels
- lp5523_run_engine
- lp5523_init_program_engine
- lp5523_update_program_memory
- lp5523_firmware_loaded
- show_engine_mode
- show_mode
- store_mode
- lp5523_mux_to_array
- show_engine_leds
- show_leds
- store_engine_leds
- store_leds
- store_load
- show_master_fader
- show_fader
- store_fader
- store_master_fader_leds
- lp5523_led_brightness
- lp5523_probe
- lp5523_remove
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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
106 enum lp5523_chip_id {
107 LP5523,
108 LP55231,
109 };
110
111 static int lp5523_init_program_engine(struct lp55xx_chip *chip);
112
113 static inline void lp5523_wait_opmode_done(void)
114 {
115 usleep_range(1000, 2000);
116 }
117
118 static 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
125 static 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
155 static 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
175 static 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
189 static 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
195 static 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
209 static 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
217 static 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
265 static 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
320 out:
321 lp5523_stop_all_engines(chip);
322 return ret;
323 }
324
325 static 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 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
363 err:
364 dev_err(&chip->cl->dev, "wrong pattern format\n");
365 return -EINVAL;
366 }
367
368 static 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
388 static 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 }
406 show_mode(1)
407 show_mode(2)
408 show_mode(3)
409
410 static 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 }
438 store_mode(1)
439 store_mode(2)
440 store_mode(3)
441
442 static 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
468 static void lp5523_mux_to_array(u16 led_mux, char *array)
469 {
470 int i, pos = 0;
471 for (i = 0; i < LP5523_MAX_LEDS; i++)
472 pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
473
474 array[pos] = '\0';
475 }
476
477 static ssize_t show_engine_leds(struct device *dev,
478 struct device_attribute *attr,
479 char *buf, int nr)
480 {
481 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
482 struct lp55xx_chip *chip = led->chip;
483 char mux[LP5523_MAX_LEDS + 1];
484
485 lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
486
487 return sprintf(buf, "%s\n", mux);
488 }
489 show_leds(1)
490 show_leds(2)
491 show_leds(3)
492
493 static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
494 {
495 struct lp55xx_engine *engine = &chip->engines[nr - 1];
496 int ret;
497 static const u8 mux_page[] = {
498 [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
499 [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
500 [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
501 };
502
503 lp5523_load_engine(chip);
504
505 ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
506 if (ret)
507 return ret;
508
509 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8));
510 if (ret)
511 return ret;
512
513 ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
514 if (ret)
515 return ret;
516
517 engine->led_mux = mux;
518 return 0;
519 }
520
521 static ssize_t store_engine_leds(struct device *dev,
522 struct device_attribute *attr,
523 const char *buf, size_t len, int nr)
524 {
525 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
526 struct lp55xx_chip *chip = led->chip;
527 struct lp55xx_engine *engine = &chip->engines[nr - 1];
528 u16 mux = 0;
529 ssize_t ret;
530
531 if (lp5523_mux_parse(buf, &mux, len))
532 return -EINVAL;
533
534 mutex_lock(&chip->lock);
535
536 chip->engine_idx = nr;
537 ret = -EINVAL;
538
539 if (engine->mode != LP55XX_ENGINE_LOAD)
540 goto leave;
541
542 if (lp5523_load_mux(chip, mux, nr))
543 goto leave;
544
545 ret = len;
546 leave:
547 mutex_unlock(&chip->lock);
548 return ret;
549 }
550 store_leds(1)
551 store_leds(2)
552 store_leds(3)
553
554 static ssize_t store_engine_load(struct device *dev,
555 struct device_attribute *attr,
556 const char *buf, size_t len, int nr)
557 {
558 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
559 struct lp55xx_chip *chip = led->chip;
560 int ret;
561
562 mutex_lock(&chip->lock);
563
564 chip->engine_idx = nr;
565 lp5523_load_engine_and_select_page(chip);
566 ret = lp5523_update_program_memory(chip, buf, len);
567
568 mutex_unlock(&chip->lock);
569
570 return ret;
571 }
572 store_load(1)
573 store_load(2)
574 store_load(3)
575
576 static ssize_t lp5523_selftest(struct device *dev,
577 struct device_attribute *attr,
578 char *buf)
579 {
580 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
581 struct lp55xx_chip *chip = led->chip;
582 struct lp55xx_platform_data *pdata = chip->pdata;
583 int i, ret, pos = 0;
584 u8 status, adc, vdd;
585
586 mutex_lock(&chip->lock);
587
588 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
589 if (ret < 0)
590 goto fail;
591
592
593 if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
594 if ((status & LP5523_EXT_CLK_USED) == 0)
595 goto fail;
596 }
597
598
599 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
600 usleep_range(3000, 6000);
601 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
602 if (ret < 0)
603 goto fail;
604
605 if (!(status & LP5523_LEDTEST_DONE))
606 usleep_range(3000, 6000);
607
608 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
609 if (ret < 0)
610 goto fail;
611
612 vdd--;
613
614 for (i = 0; i < LP5523_MAX_LEDS; i++) {
615
616 if (pdata->led_config[i].led_current == 0)
617 continue;
618
619
620 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
621 pdata->led_config[i].led_current);
622
623 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
624
625 usleep_range(2000, 4000);
626 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
627 LP5523_EN_LEDTEST | i);
628
629 usleep_range(3000, 6000);
630 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
631 if (ret < 0)
632 goto fail;
633
634 if (!(status & LP5523_LEDTEST_DONE))
635 usleep_range(3000, 6000);
636
637 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
638 if (ret < 0)
639 goto fail;
640
641 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
642 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
643
644 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
645
646
647 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
648 led->led_current);
649 led++;
650 }
651 if (pos == 0)
652 pos = sprintf(buf, "OK\n");
653 goto release_lock;
654 fail:
655 pos = sprintf(buf, "FAIL\n");
656
657 release_lock:
658 mutex_unlock(&chip->lock);
659
660 return pos;
661 }
662
663 #define show_fader(nr) \
664 static ssize_t show_master_fader##nr(struct device *dev, \
665 struct device_attribute *attr, \
666 char *buf) \
667 { \
668 return show_master_fader(dev, attr, buf, nr); \
669 }
670
671 #define store_fader(nr) \
672 static ssize_t store_master_fader##nr(struct device *dev, \
673 struct device_attribute *attr, \
674 const char *buf, size_t len) \
675 { \
676 return store_master_fader(dev, attr, buf, len, nr); \
677 }
678
679 static ssize_t show_master_fader(struct device *dev,
680 struct device_attribute *attr,
681 char *buf, int nr)
682 {
683 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
684 struct lp55xx_chip *chip = led->chip;
685 int ret;
686 u8 val;
687
688 mutex_lock(&chip->lock);
689 ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
690 mutex_unlock(&chip->lock);
691
692 if (ret == 0)
693 ret = sprintf(buf, "%u\n", val);
694
695 return ret;
696 }
697 show_fader(1)
698 show_fader(2)
699 show_fader(3)
700
701 static ssize_t store_master_fader(struct device *dev,
702 struct device_attribute *attr,
703 const char *buf, size_t len, int nr)
704 {
705 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
706 struct lp55xx_chip *chip = led->chip;
707 int ret;
708 unsigned long val;
709
710 if (kstrtoul(buf, 0, &val))
711 return -EINVAL;
712
713 if (val > 0xff)
714 return -EINVAL;
715
716 mutex_lock(&chip->lock);
717 ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
718 (u8)val);
719 mutex_unlock(&chip->lock);
720
721 if (ret == 0)
722 ret = len;
723
724 return ret;
725 }
726 store_fader(1)
727 store_fader(2)
728 store_fader(3)
729
730 static ssize_t show_master_fader_leds(struct device *dev,
731 struct device_attribute *attr,
732 char *buf)
733 {
734 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
735 struct lp55xx_chip *chip = led->chip;
736 int i, ret, pos = 0;
737 u8 val;
738
739 mutex_lock(&chip->lock);
740
741 for (i = 0; i < LP5523_MAX_LEDS; i++) {
742 ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
743 if (ret)
744 goto leave;
745
746 val = (val & LP5523_FADER_MAPPING_MASK)
747 >> LP5523_FADER_MAPPING_SHIFT;
748 if (val > 3) {
749 ret = -EINVAL;
750 goto leave;
751 }
752 buf[pos++] = val + '0';
753 }
754 buf[pos++] = '\n';
755 ret = pos;
756 leave:
757 mutex_unlock(&chip->lock);
758 return ret;
759 }
760
761 static ssize_t store_master_fader_leds(struct device *dev,
762 struct device_attribute *attr,
763 const char *buf, size_t len)
764 {
765 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
766 struct lp55xx_chip *chip = led->chip;
767 int i, n, ret;
768 u8 val;
769
770 n = min_t(int, len, LP5523_MAX_LEDS);
771
772 mutex_lock(&chip->lock);
773
774 for (i = 0; i < n; i++) {
775 if (buf[i] >= '0' && buf[i] <= '3') {
776 val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
777 ret = lp55xx_update_bits(chip,
778 LP5523_REG_LED_CTRL_BASE + i,
779 LP5523_FADER_MAPPING_MASK,
780 val);
781 if (ret)
782 goto leave;
783 } else {
784 ret = -EINVAL;
785 goto leave;
786 }
787 }
788 ret = len;
789 leave:
790 mutex_unlock(&chip->lock);
791 return ret;
792 }
793
794 static int lp5523_led_brightness(struct lp55xx_led *led)
795 {
796 struct lp55xx_chip *chip = led->chip;
797 int ret;
798
799 mutex_lock(&chip->lock);
800 ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
801 led->brightness);
802 mutex_unlock(&chip->lock);
803 return ret;
804 }
805
806 static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
807 static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
808 static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
809 static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
810 static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
811 static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
812 static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
813 static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
814 static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
815 static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
816 static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
817 store_master_fader1);
818 static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
819 store_master_fader2);
820 static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
821 store_master_fader3);
822 static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
823 store_master_fader_leds);
824
825 static struct attribute *lp5523_attributes[] = {
826 &dev_attr_engine1_mode.attr,
827 &dev_attr_engine2_mode.attr,
828 &dev_attr_engine3_mode.attr,
829 &dev_attr_engine1_load.attr,
830 &dev_attr_engine2_load.attr,
831 &dev_attr_engine3_load.attr,
832 &dev_attr_engine1_leds.attr,
833 &dev_attr_engine2_leds.attr,
834 &dev_attr_engine3_leds.attr,
835 &dev_attr_selftest.attr,
836 &dev_attr_master_fader1.attr,
837 &dev_attr_master_fader2.attr,
838 &dev_attr_master_fader3.attr,
839 &dev_attr_master_fader_leds.attr,
840 NULL,
841 };
842
843 static const struct attribute_group lp5523_group = {
844 .attrs = lp5523_attributes,
845 };
846
847
848 static struct lp55xx_device_config lp5523_cfg = {
849 .reset = {
850 .addr = LP5523_REG_RESET,
851 .val = LP5523_RESET,
852 },
853 .enable = {
854 .addr = LP5523_REG_ENABLE,
855 .val = LP5523_ENABLE,
856 },
857 .max_channel = LP5523_MAX_LEDS,
858 .post_init_device = lp5523_post_init_device,
859 .brightness_fn = lp5523_led_brightness,
860 .set_led_current = lp5523_set_led_current,
861 .firmware_cb = lp5523_firmware_loaded,
862 .run_engine = lp5523_run_engine,
863 .dev_attr_group = &lp5523_group,
864 };
865
866 static int lp5523_probe(struct i2c_client *client,
867 const struct i2c_device_id *id)
868 {
869 int ret;
870 struct lp55xx_chip *chip;
871 struct lp55xx_led *led;
872 struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
873 struct device_node *np = client->dev.of_node;
874
875 if (!pdata) {
876 if (np) {
877 pdata = lp55xx_of_populate_pdata(&client->dev, np);
878 if (IS_ERR(pdata))
879 return PTR_ERR(pdata);
880 } else {
881 dev_err(&client->dev, "no platform data\n");
882 return -EINVAL;
883 }
884 }
885
886 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
887 if (!chip)
888 return -ENOMEM;
889
890 led = devm_kcalloc(&client->dev,
891 pdata->num_channels, sizeof(*led), GFP_KERNEL);
892 if (!led)
893 return -ENOMEM;
894
895 chip->cl = client;
896 chip->pdata = pdata;
897 chip->cfg = &lp5523_cfg;
898
899 mutex_init(&chip->lock);
900
901 i2c_set_clientdata(client, led);
902
903 ret = lp55xx_init_device(chip);
904 if (ret)
905 goto err_init;
906
907 dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
908
909 ret = lp55xx_register_leds(led, chip);
910 if (ret)
911 goto err_register_leds;
912
913 ret = lp55xx_register_sysfs(chip);
914 if (ret) {
915 dev_err(&client->dev, "registering sysfs failed\n");
916 goto err_register_sysfs;
917 }
918
919 return 0;
920
921 err_register_sysfs:
922 lp55xx_unregister_leds(led, chip);
923 err_register_leds:
924 lp55xx_deinit_device(chip);
925 err_init:
926 return ret;
927 }
928
929 static int lp5523_remove(struct i2c_client *client)
930 {
931 struct lp55xx_led *led = i2c_get_clientdata(client);
932 struct lp55xx_chip *chip = led->chip;
933
934 lp5523_stop_all_engines(chip);
935 lp55xx_unregister_sysfs(chip);
936 lp55xx_unregister_leds(led, chip);
937 lp55xx_deinit_device(chip);
938
939 return 0;
940 }
941
942 static const struct i2c_device_id lp5523_id[] = {
943 { "lp5523", LP5523 },
944 { "lp55231", LP55231 },
945 { }
946 };
947
948 MODULE_DEVICE_TABLE(i2c, lp5523_id);
949
950 #ifdef CONFIG_OF
951 static const struct of_device_id of_lp5523_leds_match[] = {
952 { .compatible = "national,lp5523", },
953 { .compatible = "ti,lp55231", },
954 {},
955 };
956
957 MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
958 #endif
959
960 static struct i2c_driver lp5523_driver = {
961 .driver = {
962 .name = "lp5523x",
963 .of_match_table = of_match_ptr(of_lp5523_leds_match),
964 },
965 .probe = lp5523_probe,
966 .remove = lp5523_remove,
967 .id_table = lp5523_id,
968 };
969
970 module_i2c_driver(lp5523_driver);
971
972 MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
973 MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
974 MODULE_DESCRIPTION("LP5523 LED engine");
975 MODULE_LICENSE("GPL");