]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blame - drivers/video/backlight/adp8870_bl.c
projects / mirror_ubuntu-focal-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
backlight: adp8860: Move header file out of I2C realm
[mirror_ubuntu-focal-kernel.git] / drivers / video / backlight / adp8870_bl.c
CommitLineData
a59ec1e7
MH		 1/*
2 * Backlight driver for Analog Devices ADP8870 Backlight Devices
3 *
4 * Copyright 2009-2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/module.h>
a59ec1e7
MH		 10#include <linux/init.h>
11#include <linux/errno.h>
12#include <linux/pm.h>
13#include <linux/platform_device.h>
14#include <linux/i2c.h>
15#include <linux/fb.h>
16#include <linux/backlight.h>
17#include <linux/leds.h>
18#include <linux/workqueue.h>
19#include <linux/slab.h>
20
21#include <linux/i2c/adp8870.h>
22#define ADP8870_EXT_FEATURES
23#define ADP8870_USE_LEDS
24
25
26#define ADP8870_MFDVID 0x00 /* Manufacturer and device ID */
27#define ADP8870_MDCR 0x01 /* Device mode and status */
28#define ADP8870_INT_STAT 0x02 /* Interrupts status */
29#define ADP8870_INT_EN 0x03 /* Interrupts enable */
30#define ADP8870_CFGR 0x04 /* Configuration register */
31#define ADP8870_BLSEL 0x05 /* Sink enable backlight or independent */
32#define ADP8870_PWMLED 0x06 /* PWM Enable Selection Register */
33#define ADP8870_BLOFF 0x07 /* Backlight off timeout */
34#define ADP8870_BLDIM 0x08 /* Backlight dim timeout */
35#define ADP8870_BLFR 0x09 /* Backlight fade in and out rates */
36#define ADP8870_BLMX1 0x0A /* Backlight (Brightness Level 1-daylight) maximum current */
37#define ADP8870_BLDM1 0x0B /* Backlight (Brightness Level 1-daylight) dim current */
38#define ADP8870_BLMX2 0x0C /* Backlight (Brightness Level 2-bright) maximum current */
39#define ADP8870_BLDM2 0x0D /* Backlight (Brightness Level 2-bright) dim current */
40#define ADP8870_BLMX3 0x0E /* Backlight (Brightness Level 3-office) maximum current */
41#define ADP8870_BLDM3 0x0F /* Backlight (Brightness Level 3-office) dim current */
42#define ADP8870_BLMX4 0x10 /* Backlight (Brightness Level 4-indoor) maximum current */
43#define ADP8870_BLDM4 0x11 /* Backlight (Brightness Level 4-indoor) dim current */
44#define ADP8870_BLMX5 0x12 /* Backlight (Brightness Level 5-dark) maximum current */
45#define ADP8870_BLDM5 0x13 /* Backlight (Brightness Level 5-dark) dim current */
46#define ADP8870_ISCLAW 0x1A /* Independent sink current fade law register */
47#define ADP8870_ISCC 0x1B /* Independent sink current control register */
48#define ADP8870_ISCT1 0x1C /* Independent Sink Current Timer Register LED[7:5] */
49#define ADP8870_ISCT2 0x1D /* Independent Sink Current Timer Register LED[4:1] */
50#define ADP8870_ISCF 0x1E /* Independent sink current fade register */
51#define ADP8870_ISC1 0x1F /* Independent Sink Current LED1 */
52#define ADP8870_ISC2 0x20 /* Independent Sink Current LED2 */
53#define ADP8870_ISC3 0x21 /* Independent Sink Current LED3 */
54#define ADP8870_ISC4 0x22 /* Independent Sink Current LED4 */
55#define ADP8870_ISC5 0x23 /* Independent Sink Current LED5 */
56#define ADP8870_ISC6 0x24 /* Independent Sink Current LED6 */
57#define ADP8870_ISC7 0x25 /* Independent Sink Current LED7 (Brightness Level 1-daylight) */
58#define ADP8870_ISC7_L2 0x26 /* Independent Sink Current LED7 (Brightness Level 2-bright) */
59#define ADP8870_ISC7_L3 0x27 /* Independent Sink Current LED7 (Brightness Level 3-office) */
60#define ADP8870_ISC7_L4 0x28 /* Independent Sink Current LED7 (Brightness Level 4-indoor) */
61#define ADP8870_ISC7_L5 0x29 /* Independent Sink Current LED7 (Brightness Level 5-dark) */
62#define ADP8870_CMP_CTL 0x2D /* ALS Comparator Control Register */
63#define ADP8870_ALS1_EN 0x2E /* Main ALS comparator level enable */
64#define ADP8870_ALS2_EN 0x2F /* Second ALS comparator level enable */
65#define ADP8870_ALS1_STAT 0x30 /* Main ALS Comparator Status Register */
66#define ADP8870_ALS2_STAT 0x31 /* Second ALS Comparator Status Register */
67#define ADP8870_L2TRP 0x32 /* L2 comparator reference */
68#define ADP8870_L2HYS 0x33 /* L2 hysteresis */
69#define ADP8870_L3TRP 0x34 /* L3 comparator reference */
70#define ADP8870_L3HYS 0x35 /* L3 hysteresis */
71#define ADP8870_L4TRP 0x36 /* L4 comparator reference */
72#define ADP8870_L4HYS 0x37 /* L4 hysteresis */
73#define ADP8870_L5TRP 0x38 /* L5 comparator reference */
74#define ADP8870_L5HYS 0x39 /* L5 hysteresis */
75#define ADP8870_PH1LEVL 0x40 /* First phototransistor ambient light level-low byte register */
76#define ADP8870_PH1LEVH 0x41 /* First phototransistor ambient light level-high byte register */
77#define ADP8870_PH2LEVL 0x42 /* Second phototransistor ambient light level-low byte register */
78#define ADP8870_PH2LEVH 0x43 /* Second phototransistor ambient light level-high byte register */
79
80#define ADP8870_MANUFID 0x3 /* Analog Devices AD8870 Manufacturer and device ID */
81#define ADP8870_DEVID(x) ((x) & 0xF)
82#define ADP8870_MANID(x) ((x) >> 4)
83
84/* MDCR Device mode and status */
85#define D7ALSEN (1 << 7)
86#define INT_CFG (1 << 6)
87#define NSTBY (1 << 5)
88#define DIM_EN (1 << 4)
89#define GDWN_DIS (1 << 3)
90#define SIS_EN (1 << 2)
91#define CMP_AUTOEN (1 << 1)
92#define BLEN (1 << 0)
93
94/* ADP8870_ALS1_EN Main ALS comparator level enable */
95#define L5_EN (1 << 3)
96#define L4_EN (1 << 2)
97#define L3_EN (1 << 1)
98#define L2_EN (1 << 0)
99
100#define CFGR_BLV_SHIFT 3
101#define CFGR_BLV_MASK 0x7
102#define ADP8870_FLAG_LED_MASK 0xFF
103
104#define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4))
105#define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1))
106#define ALS_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1)
107
108struct adp8870_bl {
109 struct i2c_client *client;
110 struct backlight_device *bl;
111 struct adp8870_led *led;
112 struct adp8870_backlight_platform_data *pdata;
113 struct mutex lock;
114 unsigned long cached_daylight_max;
115 int id;
116 int revid;
117 int current_brightness;
118};
119
120struct adp8870_led {
121 struct led_classdev cdev;
122 struct work_struct work;
123 struct i2c_client *client;
124 enum led_brightness new_brightness;
125 int id;
126 int flags;
127};
128
129static int adp8870_read(struct i2c_client *client, int reg, uint8_t *val)
130{
131 int ret;
132
133 ret = i2c_smbus_read_byte_data(client, reg);
134 if (ret < 0) {
135 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
136 return ret;
137 }
138
139 *val = ret;
140 return 0;
141}
142
143
144static int adp8870_write(struct i2c_client *client, u8 reg, u8 val)
145{
146 int ret = i2c_smbus_write_byte_data(client, reg, val);
fe9a8623 147
a59ec1e7
MH		 148 if (ret)
149 dev_err(&client->dev, "failed to write\n");
150
151 return ret;
152}
153
154static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
155{
156 struct adp8870_bl *data = i2c_get_clientdata(client);
157 uint8_t reg_val;
158 int ret;
159
160 mutex_lock(&data->lock);
161
162 ret = adp8870_read(client, reg, &reg_val);
163
36c3e759 164 if (!ret && ((reg_val & bit_mask) != bit_mask)) {
a59ec1e7
MH		 165 reg_val |= bit_mask;
166 ret = adp8870_write(client, reg, reg_val);
167 }
168
169 mutex_unlock(&data->lock);
170 return ret;
171}
172
173static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
174{
175 struct adp8870_bl *data = i2c_get_clientdata(client);
176 uint8_t reg_val;
177 int ret;
178
179 mutex_lock(&data->lock);
180
181 ret = adp8870_read(client, reg, &reg_val);
182
183 if (!ret && (reg_val & bit_mask)) {
184 reg_val &= ~bit_mask;
185 ret = adp8870_write(client, reg, reg_val);
186 }
187
188 mutex_unlock(&data->lock);
189 return ret;
190}
191
192/*
193 * Independent sink / LED
194 */
195#if defined(ADP8870_USE_LEDS)
196static void adp8870_led_work(struct work_struct *work)
197{
198 struct adp8870_led *led = container_of(work, struct adp8870_led, work);
fe9a8623 199
a59ec1e7
MH		 200 adp8870_write(led->client, ADP8870_ISC1 + led->id - 1,
201 led->new_brightness >> 1);
202}
203
204static void adp8870_led_set(struct led_classdev *led_cdev,
205 enum led_brightness value)
206{
207 struct adp8870_led *led;
208
209 led = container_of(led_cdev, struct adp8870_led, cdev);
210 led->new_brightness = value;
211 /*
212 * Use workqueue for IO since I2C operations can sleep.
213 */
214 schedule_work(&led->work);
215}
216
217static int adp8870_led_setup(struct adp8870_led *led)
218{
219 struct i2c_client *client = led->client;
220 int ret = 0;
221
222 ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0);
223 if (ret)
224 return ret;
225
226 ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1));
227 if (ret)
228 return ret;
229
230 if (led->id > 4)
231 ret = adp8870_set_bits(client, ADP8870_ISCT1,
232 (led->flags & 0x3) << ((led->id - 5) * 2));
233 else
234 ret = adp8870_set_bits(client, ADP8870_ISCT2,
235 (led->flags & 0x3) << ((led->id - 1) * 2));
236
237 return ret;
238}
239
1b9e450d 240static int adp8870_led_probe(struct i2c_client *client)
a59ec1e7
MH		 241{
242 struct adp8870_backlight_platform_data *pdata =
c512794c 243 dev_get_platdata(&client->dev);
a59ec1e7
MH		 244 struct adp8870_bl *data = i2c_get_clientdata(client);
245 struct adp8870_led *led, *led_dat;
246 struct led_info *cur_led;
247 int ret, i;
248
91cdb239
JH		 249 led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led),
250 GFP_KERNEL);
0167a956 251 if (led == NULL)
a59ec1e7 252 return -ENOMEM;
a59ec1e7
MH		 253
254 ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law);
255 if (ret)
91cdb239 256 return ret;
a59ec1e7
MH		 257
258 ret = adp8870_write(client, ADP8870_ISCT1,
259 (pdata->led_on_time & 0x3) << 6);
260 if (ret)
91cdb239 261 return ret;
a59ec1e7
MH		 262
263 ret = adp8870_write(client, ADP8870_ISCF,
264 FADE_VAL(pdata->led_fade_in, pdata->led_fade_out));
265 if (ret)
91cdb239 266 return ret;
a59ec1e7
MH		 267
268 for (i = 0; i < pdata->num_leds; ++i) {
269 cur_led = &pdata->leds[i];
270 led_dat = &led[i];
271
272 led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK;
273
274 if (led_dat->id > 7 || led_dat->id < 1) {
275 dev_err(&client->dev, "Invalid LED ID %d\n",
276 led_dat->id);
514f920a 277 ret = -EINVAL;
a59ec1e7
MH		 278 goto err;
279 }
280
281 if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) {
282 dev_err(&client->dev, "LED %d used by Backlight\n",
283 led_dat->id);
514f920a 284 ret = -EBUSY;
a59ec1e7
MH		 285 goto err;
286 }
287
288 led_dat->cdev.name = cur_led->name;
289 led_dat->cdev.default_trigger = cur_led->default_trigger;
290 led_dat->cdev.brightness_set = adp8870_led_set;
291 led_dat->cdev.brightness = LED_OFF;
292 led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT;
293 led_dat->client = client;
294 led_dat->new_brightness = LED_OFF;
295 INIT_WORK(&led_dat->work, adp8870_led_work);
296
297 ret = led_classdev_register(&client->dev, &led_dat->cdev);
298 if (ret) {
299 dev_err(&client->dev, "failed to register LED %d\n",
300 led_dat->id);
301 goto err;
302 }
303
304 ret = adp8870_led_setup(led_dat);
305 if (ret) {
306 dev_err(&client->dev, "failed to write\n");
307 i++;
308 goto err;
309 }
310 }
311
312 data->led = led;
313
314 return 0;
315
316 err:
317 for (i = i - 1; i >= 0; --i) {
318 led_classdev_unregister(&led[i].cdev);
319 cancel_work_sync(&led[i].work);
320 }
321
a59ec1e7
MH		 322 return ret;
323}
324
7e4b9d0b 325static int adp8870_led_remove(struct i2c_client *client)
a59ec1e7
MH		 326{
327 struct adp8870_backlight_platform_data *pdata =
c512794c 328 dev_get_platdata(&client->dev);
a59ec1e7
MH		 329 struct adp8870_bl *data = i2c_get_clientdata(client);
330 int i;
331
332 for (i = 0; i < pdata->num_leds; i++) {
333 led_classdev_unregister(&data->led[i].cdev);
334 cancel_work_sync(&data->led[i].work);
335 }
336
a59ec1e7
MH		 337 return 0;
338}
339#else
1b9e450d 340static int adp8870_led_probe(struct i2c_client *client)
a59ec1e7
MH		 341{
342 return 0;
343}
344
7e4b9d0b 345static int adp8870_led_remove(struct i2c_client *client)
a59ec1e7
MH		 346{
347 return 0;
348}
349#endif
350
351static int adp8870_bl_set(struct backlight_device *bl, int brightness)
352{
353 struct adp8870_bl *data = bl_get_data(bl);
354 struct i2c_client *client = data->client;
355 int ret = 0;
356
357 if (data->pdata->en_ambl_sens) {
358 if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) {
359 /* Disable Ambient Light auto adjust */
360 ret = adp8870_clr_bits(client, ADP8870_MDCR,
361 CMP_AUTOEN);
362 if (ret)
363 return ret;
364 ret = adp8870_write(client, ADP8870_BLMX1, brightness);
365 if (ret)
366 return ret;
367 } else {
368 /*
369 * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
370 * restore daylight l1 sysfs brightness
371 */
372 ret = adp8870_write(client, ADP8870_BLMX1,
373 data->cached_daylight_max);
374 if (ret)
375 return ret;
376
377 ret = adp8870_set_bits(client, ADP8870_MDCR,
378 CMP_AUTOEN);
379 if (ret)
380 return ret;
381 }
382 } else {
383 ret = adp8870_write(client, ADP8870_BLMX1, brightness);
384 if (ret)
385 return ret;
386 }
387
388 if (data->current_brightness && brightness == 0)
389 ret = adp8870_set_bits(client,
390 ADP8870_MDCR, DIM_EN);
391 else if (data->current_brightness == 0 && brightness)
392 ret = adp8870_clr_bits(client,
393 ADP8870_MDCR, DIM_EN);
394
395 if (!ret)
396 data->current_brightness = brightness;
397
398 return ret;
399}
400
401static int adp8870_bl_update_status(struct backlight_device *bl)
402{
403 int brightness = bl->props.brightness;
fe9a8623 404
a59ec1e7
MH		 405 if (bl->props.power != FB_BLANK_UNBLANK)
406 brightness = 0;
407
408 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
409 brightness = 0;
410
411 return adp8870_bl_set(bl, brightness);
412}
413
414static int adp8870_bl_get_brightness(struct backlight_device *bl)
415{
416 struct adp8870_bl *data = bl_get_data(bl);
417
418 return data->current_brightness;
419}
420
421static const struct backlight_ops adp8870_bl_ops = {
422 .update_status = adp8870_bl_update_status,
423 .get_brightness = adp8870_bl_get_brightness,
424};
425
426static int adp8870_bl_setup(struct backlight_device *bl)
427{
428 struct adp8870_bl *data = bl_get_data(bl);
429 struct i2c_client *client = data->client;
430 struct adp8870_backlight_platform_data *pdata = data->pdata;
431 int ret = 0;
432
433 ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign);
434 if (ret)
435 return ret;
436
437 ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign);
438 if (ret)
439 return ret;
440
441 ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max);
442 if (ret)
443 return ret;
444
445 ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim);
446 if (ret)
447 return ret;
448
449 if (pdata->en_ambl_sens) {
450 data->cached_daylight_max = pdata->l1_daylight_max;
451 ret = adp8870_write(client, ADP8870_BLMX2,
452 pdata->l2_bright_max);
453 if (ret)
454 return ret;
455 ret = adp8870_write(client, ADP8870_BLDM2,
456 pdata->l2_bright_dim);
457 if (ret)
458 return ret;
459
460 ret = adp8870_write(client, ADP8870_BLMX3,
461 pdata->l3_office_max);
462 if (ret)
463 return ret;
464 ret = adp8870_write(client, ADP8870_BLDM3,
465 pdata->l3_office_dim);
466 if (ret)
467 return ret;
468
469 ret = adp8870_write(client, ADP8870_BLMX4,
470 pdata->l4_indoor_max);
471 if (ret)
472 return ret;
473
474 ret = adp8870_write(client, ADP8870_BLDM4,
475 pdata->l4_indor_dim);
476 if (ret)
477 return ret;
478
479 ret = adp8870_write(client, ADP8870_BLMX5,
480 pdata->l5_dark_max);
481 if (ret)
482 return ret;
483
484 ret = adp8870_write(client, ADP8870_BLDM5,
485 pdata->l5_dark_dim);
486 if (ret)
487 return ret;
488
489 ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip);
490 if (ret)
491 return ret;
492
493 ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst);
494 if (ret)
495 return ret;
496
497 ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip);
498 if (ret)
499 return ret;
500
501 ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst);
502 if (ret)
503 return ret;
504
505 ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip);
506 if (ret)
507 return ret;
508
509 ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst);
510 if (ret)
511 return ret;
512
513 ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip);
514 if (ret)
515 return ret;
516
517 ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst);
518 if (ret)
519 return ret;
520
521 ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN |
522 L3_EN | L2_EN);
523 if (ret)
524 return ret;
525
526 ret = adp8870_write(client, ADP8870_CMP_CTL,
527 ALS_CMPR_CFG_VAL(pdata->abml_filt));
528 if (ret)
529 return ret;
530 }
531
532 ret = adp8870_write(client, ADP8870_CFGR,
533 BL_CFGR_VAL(pdata->bl_fade_law, 0));
534 if (ret)
535 return ret;
536
537 ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in,
538 pdata->bl_fade_out));
539 if (ret)
540 return ret;
541 /*
542 * ADP8870 Rev0 requires GDWN_DIS bit set
543 */
544
545 ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY |
546 (data->revid == 0 ? GDWN_DIS : 0));
547
548 return ret;
549}
550
551static ssize_t adp8870_show(struct device *dev, char *buf, int reg)
552{
553 struct adp8870_bl *data = dev_get_drvdata(dev);
554 int error;
555 uint8_t reg_val;
556
557 mutex_lock(&data->lock);
558 error = adp8870_read(data->client, reg, &reg_val);
559 mutex_unlock(&data->lock);
560
561 if (error < 0)
562 return error;
563
564 return sprintf(buf, "%u\n", reg_val);
565}
566
567static ssize_t adp8870_store(struct device *dev, const char *buf,
568 size_t count, int reg)
569{
570 struct adp8870_bl *data = dev_get_drvdata(dev);
571 unsigned long val;
572 int ret;
573
dc406f56 574 ret = kstrtoul(buf, 10, &val);
a59ec1e7
MH		 575 if (ret)
576 return ret;
577
578 mutex_lock(&data->lock);
579 adp8870_write(data->client, reg, val);
580 mutex_unlock(&data->lock);
581
582 return count;
583}
584
585static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev,
586 struct device_attribute *attr, char *buf)
587{
588 return adp8870_show(dev, buf, ADP8870_BLMX5);
589}
590
591static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev,
592 struct device_attribute *attr, const char *buf, size_t count)
593{
594 return adp8870_store(dev, buf, count, ADP8870_BLMX5);
595}
596static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show,
597 adp8870_bl_l5_dark_max_store);
598
599
600static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev,
601 struct device_attribute *attr, char *buf)
602{
603 return adp8870_show(dev, buf, ADP8870_BLMX4);
604}
605
606static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev,
607 struct device_attribute *attr, const char *buf, size_t count)
608{
609 return adp8870_store(dev, buf, count, ADP8870_BLMX4);
610}
611static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show,
612 adp8870_bl_l4_indoor_max_store);
613
614
615static ssize_t adp8870_bl_l3_office_max_show(struct device *dev,
616 struct device_attribute *attr, char *buf)
617{
618 return adp8870_show(dev, buf, ADP8870_BLMX3);
619}
620
621static ssize_t adp8870_bl_l3_office_max_store(struct device *dev,
622 struct device_attribute *attr, const char *buf, size_t count)
623{
624 return adp8870_store(dev, buf, count, ADP8870_BLMX3);
625}
626
627static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show,
628 adp8870_bl_l3_office_max_store);
629
630static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev,
631 struct device_attribute *attr, char *buf)
632{
633 return adp8870_show(dev, buf, ADP8870_BLMX2);
634}
635
636static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev,
637 struct device_attribute *attr, const char *buf, size_t count)
638{
639 return adp8870_store(dev, buf, count, ADP8870_BLMX2);
640}
641static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show,
642 adp8870_bl_l2_bright_max_store);
643
644static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev,
645 struct device_attribute *attr, char *buf)
646{
647 return adp8870_show(dev, buf, ADP8870_BLMX1);
648}
649
650static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev,
651 struct device_attribute *attr, const char *buf, size_t count)
652{
653 struct adp8870_bl *data = dev_get_drvdata(dev);
dc406f56 654 int ret = kstrtoul(buf, 10, &data->cached_daylight_max);
fe9a8623 655
a59ec1e7
MH		 656 if (ret)
657 return ret;
658
659 return adp8870_store(dev, buf, count, ADP8870_BLMX1);
660}
661static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show,
662 adp8870_bl_l1_daylight_max_store);
663
664static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev,
665 struct device_attribute *attr, char *buf)
666{
667 return adp8870_show(dev, buf, ADP8870_BLDM5);
668}
669
670static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev,
671 struct device_attribute *attr,
672 const char *buf, size_t count)
673{
674 return adp8870_store(dev, buf, count, ADP8870_BLDM5);
675}
676static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show,
677 adp8870_bl_l5_dark_dim_store);
678
679static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev,
680 struct device_attribute *attr, char *buf)
681{
682 return adp8870_show(dev, buf, ADP8870_BLDM4);
683}
684
685static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev,
686 struct device_attribute *attr,
687 const char *buf, size_t count)
688{
689 return adp8870_store(dev, buf, count, ADP8870_BLDM4);
690}
691static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show,
692 adp8870_bl_l4_indoor_dim_store);
693
694
695static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev,
696 struct device_attribute *attr, char *buf)
697{
698 return adp8870_show(dev, buf, ADP8870_BLDM3);
699}
700
701static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev,
702 struct device_attribute *attr,
703 const char *buf, size_t count)
704{
705 return adp8870_store(dev, buf, count, ADP8870_BLDM3);
706}
707static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show,
708 adp8870_bl_l3_office_dim_store);
709
710static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev,
711 struct device_attribute *attr, char *buf)
712{
713 return adp8870_show(dev, buf, ADP8870_BLDM2);
714}
715
716static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev,
717 struct device_attribute *attr,
718 const char *buf, size_t count)
719{
720 return adp8870_store(dev, buf, count, ADP8870_BLDM2);
721}
722static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show,
723 adp8870_bl_l2_bright_dim_store);
724
725static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev,
726 struct device_attribute *attr, char *buf)
727{
728 return adp8870_show(dev, buf, ADP8870_BLDM1);
729}
730
731static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev,
732 struct device_attribute *attr,
733 const char *buf, size_t count)
734{
735 return adp8870_store(dev, buf, count, ADP8870_BLDM1);
736}
737static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show,
738 adp8870_bl_l1_daylight_dim_store);
739
740#ifdef ADP8870_EXT_FEATURES
741static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev,
742 struct device_attribute *attr, char *buf)
743{
744 struct adp8870_bl *data = dev_get_drvdata(dev);
745 int error;
746 uint8_t reg_val;
747 uint16_t ret_val;
748
749 mutex_lock(&data->lock);
750 error = adp8870_read(data->client, ADP8870_PH1LEVL, &reg_val);
751 if (error < 0) {
752 mutex_unlock(&data->lock);
753 return error;
754 }
755 ret_val = reg_val;
756 error = adp8870_read(data->client, ADP8870_PH1LEVH, &reg_val);
757 mutex_unlock(&data->lock);
758
759 if (error < 0)
760 return error;
761
762 /* Return 13-bit conversion value for the first light sensor */
763 ret_val += (reg_val & 0x1F) << 8;
764
765 return sprintf(buf, "%u\n", ret_val);
766}
767static DEVICE_ATTR(ambient_light_level, 0444,
768 adp8870_bl_ambient_light_level_show, NULL);
769
770static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev,
771 struct device_attribute *attr, char *buf)
772{
773 struct adp8870_bl *data = dev_get_drvdata(dev);
774 int error;
775 uint8_t reg_val;
776
777 mutex_lock(&data->lock);
778 error = adp8870_read(data->client, ADP8870_CFGR, &reg_val);
779 mutex_unlock(&data->lock);
780
781 if (error < 0)
782 return error;
783
784 return sprintf(buf, "%u\n",
785 ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1);
786}
787
788static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev,
789 struct device_attribute *attr,
790 const char *buf, size_t count)
791{
792 struct adp8870_bl *data = dev_get_drvdata(dev);
793 unsigned long val;
794 uint8_t reg_val;
795 int ret;
796
dc406f56 797 ret = kstrtoul(buf, 10, &val);
a59ec1e7
MH		 798 if (ret)
799 return ret;
800
801 if (val == 0) {
802 /* Enable automatic ambient light sensing */
803 adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN);
804 } else if ((val > 0) && (val < 6)) {
805 /* Disable automatic ambient light sensing */
806 adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN);
807
808 /* Set user supplied ambient light zone */
809 mutex_lock(&data->lock);
86c68e2f
AB		 810 ret = adp8870_read(data->client, ADP8870_CFGR, &reg_val);
811 if (!ret) {
812 reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
813 reg_val |= (val - 1) << CFGR_BLV_SHIFT;
814 adp8870_write(data->client, ADP8870_CFGR, reg_val);
815 }
a59ec1e7
MH		 816 mutex_unlock(&data->lock);
817 }
818
819 return count;
820}
821static DEVICE_ATTR(ambient_light_zone, 0664,
822 adp8870_bl_ambient_light_zone_show,
823 adp8870_bl_ambient_light_zone_store);
824#endif
825
826static struct attribute *adp8870_bl_attributes[] = {
827 &dev_attr_l5_dark_max.attr,
828 &dev_attr_l5_dark_dim.attr,
829 &dev_attr_l4_indoor_max.attr,
830 &dev_attr_l4_indoor_dim.attr,
831 &dev_attr_l3_office_max.attr,
832 &dev_attr_l3_office_dim.attr,
833 &dev_attr_l2_bright_max.attr,
834 &dev_attr_l2_bright_dim.attr,
835 &dev_attr_l1_daylight_max.attr,
836 &dev_attr_l1_daylight_dim.attr,
837#ifdef ADP8870_EXT_FEATURES
838 &dev_attr_ambient_light_level.attr,
839 &dev_attr_ambient_light_zone.attr,
840#endif
841 NULL
842};
843
844static const struct attribute_group adp8870_bl_attr_group = {
845 .attrs = adp8870_bl_attributes,
846};
847
1b9e450d 848static int adp8870_probe(struct i2c_client *client,
a59ec1e7
MH		 849 const struct i2c_device_id *id)
850{
851 struct backlight_properties props;
852 struct backlight_device *bl;
853 struct adp8870_bl *data;
854 struct adp8870_backlight_platform_data *pdata =
c512794c 855 dev_get_platdata(&client->dev);
a59ec1e7
MH		 856 uint8_t reg_val;
857 int ret;
858
859 if (!i2c_check_functionality(client->adapter,
860 I2C_FUNC_SMBUS_BYTE_DATA)) {
861 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
862 return -EIO;
863 }
864
865 if (!pdata) {
866 dev_err(&client->dev, "no platform data?\n");
867 return -EINVAL;
868 }
869
870 ret = adp8870_read(client, ADP8870_MFDVID, &reg_val);
871 if (ret < 0)
872 return -EIO;
873
874 if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) {
875 dev_err(&client->dev, "failed to probe\n");
876 return -ENODEV;
877 }
878
91cdb239 879 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
a59ec1e7
MH		 880 if (data == NULL)
881 return -ENOMEM;
882
883 data->revid = ADP8870_DEVID(reg_val);
884 data->client = client;
885 data->pdata = pdata;
886 data->id = id->driver_data;
887 data->current_brightness = 0;
888 i2c_set_clientdata(client, data);
889
890 mutex_init(&data->lock);
891
892 memset(&props, 0, sizeof(props));
e1bbd19b 893 props.type = BACKLIGHT_RAW;
a59ec1e7 894 props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS;
568ee6c3
JH		 895 bl = devm_backlight_device_register(&client->dev,
896 dev_driver_string(&client->dev),
897 &client->dev, data, &adp8870_bl_ops, &props);
a59ec1e7
MH		 898 if (IS_ERR(bl)) {
899 dev_err(&client->dev, "failed to register backlight\n");
91cdb239 900 return PTR_ERR(bl);
a59ec1e7
MH		 901 }
902
903 data->bl = bl;
904
8541b827 905 if (pdata->en_ambl_sens) {
a59ec1e7
MH		 906 ret = sysfs_create_group(&bl->dev.kobj,
907 &adp8870_bl_attr_group);
8541b827
JH		 908 if (ret) {
909 dev_err(&client->dev, "failed to register sysfs\n");
568ee6c3 910 return ret;
8541b827 911 }
a59ec1e7
MH		 912 }
913
914 ret = adp8870_bl_setup(bl);
915 if (ret) {
916 ret = -EIO;
917 goto out;
918 }
919
920 backlight_update_status(bl);
921
922 dev_info(&client->dev, "Rev.%d Backlight\n", data->revid);
923
924 if (pdata->num_leds)
925 adp8870_led_probe(client);
926
927 return 0;
928
929out:
930 if (data->pdata->en_ambl_sens)
931 sysfs_remove_group(&data->bl->dev.kobj,
932 &adp8870_bl_attr_group);
a59ec1e7
MH		 933
934 return ret;
935}
936
7e4b9d0b 937static int adp8870_remove(struct i2c_client *client)
a59ec1e7
MH		 938{
939 struct adp8870_bl *data = i2c_get_clientdata(client);
940
941 adp8870_clr_bits(client, ADP8870_MDCR, NSTBY);
942
943 if (data->led)
944 adp8870_led_remove(client);
945
946 if (data->pdata->en_ambl_sens)
947 sysfs_remove_group(&data->bl->dev.kobj,
948 &adp8870_bl_attr_group);
949
a59ec1e7
MH		 950 return 0;
951}
952
3cd4291a
JH		 953#ifdef CONFIG_PM_SLEEP
954static int adp8870_i2c_suspend(struct device *dev)
a59ec1e7 955{
3cd4291a
JH		 956 struct i2c_client *client = to_i2c_client(dev);
957
a59ec1e7
MH		 958 adp8870_clr_bits(client, ADP8870_MDCR, NSTBY);
959
960 return 0;
961}
962
3cd4291a 963static int adp8870_i2c_resume(struct device *dev)
a59ec1e7 964{
3cd4291a
JH		 965 struct i2c_client *client = to_i2c_client(dev);
966
5eb02c01 967 adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN);
a59ec1e7
MH		 968
969 return 0;
970}
a59ec1e7
MH		 971#endif
972
3cd4291a
JH		 973static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend,
974 adp8870_i2c_resume);
975
a59ec1e7
MH		 976static const struct i2c_device_id adp8870_id[] = {
977 { "adp8870", 0 },
978 { }
979};
980MODULE_DEVICE_TABLE(i2c, adp8870_id);
981
982static struct i2c_driver adp8870_driver = {
983 .driver = {
3cd4291a
JH		 984 .name = KBUILD_MODNAME,
985 .pm = &adp8870_i2c_pm_ops,
a59ec1e7
MH		 986 },
987 .probe = adp8870_probe,
d1723fa2 988 .remove = adp8870_remove,
a59ec1e7
MH		 989 .id_table = adp8870_id,
990};
991
81ce6864 992module_i2c_driver(adp8870_driver);
a59ec1e7
MH		 993
994MODULE_LICENSE("GPL v2");
995MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
996MODULE_DESCRIPTION("ADP8870 Backlight driver");
Ubuntu Focal Linux kernel mirror