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80503b23 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a59ec1e7 MH |
2 | /* |
3 | * Backlight driver for Analog Devices ADP8870 Backlight Devices | |
4 | * | |
5 | * Copyright 2009-2011 Analog Devices Inc. | |
a59ec1e7 MH |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
a59ec1e7 MH |
9 | #include <linux/init.h> |
10 | #include <linux/errno.h> | |
11 | #include <linux/pm.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/fb.h> | |
15 | #include <linux/backlight.h> | |
16 | #include <linux/leds.h> | |
17 | #include <linux/workqueue.h> | |
18 | #include <linux/slab.h> | |
19 | ||
056d6ff4 | 20 | #include <linux/platform_data/adp8870.h> |
a59ec1e7 MH |
21 | #define ADP8870_EXT_FEATURES |
22 | #define ADP8870_USE_LEDS | |
23 | ||
24 | ||
25 | #define ADP8870_MFDVID 0x00 /* Manufacturer and device ID */ | |
26 | #define ADP8870_MDCR 0x01 /* Device mode and status */ | |
27 | #define ADP8870_INT_STAT 0x02 /* Interrupts status */ | |
28 | #define ADP8870_INT_EN 0x03 /* Interrupts enable */ | |
29 | #define ADP8870_CFGR 0x04 /* Configuration register */ | |
30 | #define ADP8870_BLSEL 0x05 /* Sink enable backlight or independent */ | |
31 | #define ADP8870_PWMLED 0x06 /* PWM Enable Selection Register */ | |
32 | #define ADP8870_BLOFF 0x07 /* Backlight off timeout */ | |
33 | #define ADP8870_BLDIM 0x08 /* Backlight dim timeout */ | |
34 | #define ADP8870_BLFR 0x09 /* Backlight fade in and out rates */ | |
35 | #define ADP8870_BLMX1 0x0A /* Backlight (Brightness Level 1-daylight) maximum current */ | |
36 | #define ADP8870_BLDM1 0x0B /* Backlight (Brightness Level 1-daylight) dim current */ | |
37 | #define ADP8870_BLMX2 0x0C /* Backlight (Brightness Level 2-bright) maximum current */ | |
38 | #define ADP8870_BLDM2 0x0D /* Backlight (Brightness Level 2-bright) dim current */ | |
39 | #define ADP8870_BLMX3 0x0E /* Backlight (Brightness Level 3-office) maximum current */ | |
40 | #define ADP8870_BLDM3 0x0F /* Backlight (Brightness Level 3-office) dim current */ | |
41 | #define ADP8870_BLMX4 0x10 /* Backlight (Brightness Level 4-indoor) maximum current */ | |
42 | #define ADP8870_BLDM4 0x11 /* Backlight (Brightness Level 4-indoor) dim current */ | |
43 | #define ADP8870_BLMX5 0x12 /* Backlight (Brightness Level 5-dark) maximum current */ | |
44 | #define ADP8870_BLDM5 0x13 /* Backlight (Brightness Level 5-dark) dim current */ | |
45 | #define ADP8870_ISCLAW 0x1A /* Independent sink current fade law register */ | |
46 | #define ADP8870_ISCC 0x1B /* Independent sink current control register */ | |
47 | #define ADP8870_ISCT1 0x1C /* Independent Sink Current Timer Register LED[7:5] */ | |
48 | #define ADP8870_ISCT2 0x1D /* Independent Sink Current Timer Register LED[4:1] */ | |
49 | #define ADP8870_ISCF 0x1E /* Independent sink current fade register */ | |
50 | #define ADP8870_ISC1 0x1F /* Independent Sink Current LED1 */ | |
51 | #define ADP8870_ISC2 0x20 /* Independent Sink Current LED2 */ | |
52 | #define ADP8870_ISC3 0x21 /* Independent Sink Current LED3 */ | |
53 | #define ADP8870_ISC4 0x22 /* Independent Sink Current LED4 */ | |
54 | #define ADP8870_ISC5 0x23 /* Independent Sink Current LED5 */ | |
55 | #define ADP8870_ISC6 0x24 /* Independent Sink Current LED6 */ | |
56 | #define ADP8870_ISC7 0x25 /* Independent Sink Current LED7 (Brightness Level 1-daylight) */ | |
57 | #define ADP8870_ISC7_L2 0x26 /* Independent Sink Current LED7 (Brightness Level 2-bright) */ | |
58 | #define ADP8870_ISC7_L3 0x27 /* Independent Sink Current LED7 (Brightness Level 3-office) */ | |
59 | #define ADP8870_ISC7_L4 0x28 /* Independent Sink Current LED7 (Brightness Level 4-indoor) */ | |
60 | #define ADP8870_ISC7_L5 0x29 /* Independent Sink Current LED7 (Brightness Level 5-dark) */ | |
61 | #define ADP8870_CMP_CTL 0x2D /* ALS Comparator Control Register */ | |
62 | #define ADP8870_ALS1_EN 0x2E /* Main ALS comparator level enable */ | |
63 | #define ADP8870_ALS2_EN 0x2F /* Second ALS comparator level enable */ | |
64 | #define ADP8870_ALS1_STAT 0x30 /* Main ALS Comparator Status Register */ | |
65 | #define ADP8870_ALS2_STAT 0x31 /* Second ALS Comparator Status Register */ | |
66 | #define ADP8870_L2TRP 0x32 /* L2 comparator reference */ | |
67 | #define ADP8870_L2HYS 0x33 /* L2 hysteresis */ | |
68 | #define ADP8870_L3TRP 0x34 /* L3 comparator reference */ | |
69 | #define ADP8870_L3HYS 0x35 /* L3 hysteresis */ | |
70 | #define ADP8870_L4TRP 0x36 /* L4 comparator reference */ | |
71 | #define ADP8870_L4HYS 0x37 /* L4 hysteresis */ | |
72 | #define ADP8870_L5TRP 0x38 /* L5 comparator reference */ | |
73 | #define ADP8870_L5HYS 0x39 /* L5 hysteresis */ | |
74 | #define ADP8870_PH1LEVL 0x40 /* First phototransistor ambient light level-low byte register */ | |
75 | #define ADP8870_PH1LEVH 0x41 /* First phototransistor ambient light level-high byte register */ | |
76 | #define ADP8870_PH2LEVL 0x42 /* Second phototransistor ambient light level-low byte register */ | |
77 | #define ADP8870_PH2LEVH 0x43 /* Second phototransistor ambient light level-high byte register */ | |
78 | ||
79 | #define ADP8870_MANUFID 0x3 /* Analog Devices AD8870 Manufacturer and device ID */ | |
80 | #define ADP8870_DEVID(x) ((x) & 0xF) | |
81 | #define ADP8870_MANID(x) ((x) >> 4) | |
82 | ||
83 | /* MDCR Device mode and status */ | |
84 | #define D7ALSEN (1 << 7) | |
85 | #define INT_CFG (1 << 6) | |
86 | #define NSTBY (1 << 5) | |
87 | #define DIM_EN (1 << 4) | |
88 | #define GDWN_DIS (1 << 3) | |
89 | #define SIS_EN (1 << 2) | |
90 | #define CMP_AUTOEN (1 << 1) | |
91 | #define BLEN (1 << 0) | |
92 | ||
93 | /* ADP8870_ALS1_EN Main ALS comparator level enable */ | |
94 | #define L5_EN (1 << 3) | |
95 | #define L4_EN (1 << 2) | |
96 | #define L3_EN (1 << 1) | |
97 | #define L2_EN (1 << 0) | |
98 | ||
99 | #define CFGR_BLV_SHIFT 3 | |
100 | #define CFGR_BLV_MASK 0x7 | |
101 | #define ADP8870_FLAG_LED_MASK 0xFF | |
102 | ||
103 | #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) | |
104 | #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) | |
105 | #define ALS_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1) | |
106 | ||
107 | struct adp8870_bl { | |
108 | struct i2c_client *client; | |
109 | struct backlight_device *bl; | |
110 | struct adp8870_led *led; | |
111 | struct adp8870_backlight_platform_data *pdata; | |
112 | struct mutex lock; | |
113 | unsigned long cached_daylight_max; | |
114 | int id; | |
115 | int revid; | |
116 | int current_brightness; | |
117 | }; | |
118 | ||
119 | struct adp8870_led { | |
120 | struct led_classdev cdev; | |
121 | struct work_struct work; | |
122 | struct i2c_client *client; | |
123 | enum led_brightness new_brightness; | |
124 | int id; | |
125 | int flags; | |
126 | }; | |
127 | ||
128 | static int adp8870_read(struct i2c_client *client, int reg, uint8_t *val) | |
129 | { | |
130 | int ret; | |
131 | ||
132 | ret = i2c_smbus_read_byte_data(client, reg); | |
133 | if (ret < 0) { | |
134 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
135 | return ret; | |
136 | } | |
137 | ||
138 | *val = ret; | |
139 | return 0; | |
140 | } | |
141 | ||
142 | ||
143 | static int adp8870_write(struct i2c_client *client, u8 reg, u8 val) | |
144 | { | |
145 | int ret = i2c_smbus_write_byte_data(client, reg, val); | |
fe9a8623 | 146 | |
a59ec1e7 MH |
147 | if (ret) |
148 | dev_err(&client->dev, "failed to write\n"); | |
149 | ||
150 | return ret; | |
151 | } | |
152 | ||
153 | static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
154 | { | |
155 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
156 | uint8_t reg_val; | |
157 | int ret; | |
158 | ||
159 | mutex_lock(&data->lock); | |
160 | ||
161 | ret = adp8870_read(client, reg, ®_val); | |
162 | ||
36c3e759 | 163 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
a59ec1e7 MH |
164 | reg_val |= bit_mask; |
165 | ret = adp8870_write(client, reg, reg_val); | |
166 | } | |
167 | ||
168 | mutex_unlock(&data->lock); | |
169 | return ret; | |
170 | } | |
171 | ||
172 | static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
173 | { | |
174 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
175 | uint8_t reg_val; | |
176 | int ret; | |
177 | ||
178 | mutex_lock(&data->lock); | |
179 | ||
180 | ret = adp8870_read(client, reg, ®_val); | |
181 | ||
182 | if (!ret && (reg_val & bit_mask)) { | |
183 | reg_val &= ~bit_mask; | |
184 | ret = adp8870_write(client, reg, reg_val); | |
185 | } | |
186 | ||
187 | mutex_unlock(&data->lock); | |
188 | return ret; | |
189 | } | |
190 | ||
191 | /* | |
192 | * Independent sink / LED | |
193 | */ | |
194 | #if defined(ADP8870_USE_LEDS) | |
195 | static void adp8870_led_work(struct work_struct *work) | |
196 | { | |
197 | struct adp8870_led *led = container_of(work, struct adp8870_led, work); | |
fe9a8623 | 198 | |
a59ec1e7 MH |
199 | adp8870_write(led->client, ADP8870_ISC1 + led->id - 1, |
200 | led->new_brightness >> 1); | |
201 | } | |
202 | ||
203 | static void adp8870_led_set(struct led_classdev *led_cdev, | |
204 | enum led_brightness value) | |
205 | { | |
206 | struct adp8870_led *led; | |
207 | ||
208 | led = container_of(led_cdev, struct adp8870_led, cdev); | |
209 | led->new_brightness = value; | |
210 | /* | |
211 | * Use workqueue for IO since I2C operations can sleep. | |
212 | */ | |
213 | schedule_work(&led->work); | |
214 | } | |
215 | ||
216 | static int adp8870_led_setup(struct adp8870_led *led) | |
217 | { | |
218 | struct i2c_client *client = led->client; | |
219 | int ret = 0; | |
220 | ||
221 | ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0); | |
222 | if (ret) | |
223 | return ret; | |
224 | ||
225 | ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1)); | |
226 | if (ret) | |
227 | return ret; | |
228 | ||
229 | if (led->id > 4) | |
230 | ret = adp8870_set_bits(client, ADP8870_ISCT1, | |
231 | (led->flags & 0x3) << ((led->id - 5) * 2)); | |
232 | else | |
233 | ret = adp8870_set_bits(client, ADP8870_ISCT2, | |
234 | (led->flags & 0x3) << ((led->id - 1) * 2)); | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
1b9e450d | 239 | static int adp8870_led_probe(struct i2c_client *client) |
a59ec1e7 MH |
240 | { |
241 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 242 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
243 | struct adp8870_bl *data = i2c_get_clientdata(client); |
244 | struct adp8870_led *led, *led_dat; | |
245 | struct led_info *cur_led; | |
246 | int ret, i; | |
247 | ||
a86854d0 | 248 | led = devm_kcalloc(&client->dev, pdata->num_leds, sizeof(*led), |
91cdb239 | 249 | GFP_KERNEL); |
0167a956 | 250 | if (led == NULL) |
a59ec1e7 | 251 | return -ENOMEM; |
a59ec1e7 MH |
252 | |
253 | ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); | |
254 | if (ret) | |
91cdb239 | 255 | return ret; |
a59ec1e7 MH |
256 | |
257 | ret = adp8870_write(client, ADP8870_ISCT1, | |
258 | (pdata->led_on_time & 0x3) << 6); | |
259 | if (ret) | |
91cdb239 | 260 | return ret; |
a59ec1e7 MH |
261 | |
262 | ret = adp8870_write(client, ADP8870_ISCF, | |
263 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); | |
264 | if (ret) | |
91cdb239 | 265 | return ret; |
a59ec1e7 MH |
266 | |
267 | for (i = 0; i < pdata->num_leds; ++i) { | |
268 | cur_led = &pdata->leds[i]; | |
269 | led_dat = &led[i]; | |
270 | ||
271 | led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK; | |
272 | ||
273 | if (led_dat->id > 7 || led_dat->id < 1) { | |
274 | dev_err(&client->dev, "Invalid LED ID %d\n", | |
275 | led_dat->id); | |
514f920a | 276 | ret = -EINVAL; |
a59ec1e7 MH |
277 | goto err; |
278 | } | |
279 | ||
280 | if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { | |
281 | dev_err(&client->dev, "LED %d used by Backlight\n", | |
282 | led_dat->id); | |
514f920a | 283 | ret = -EBUSY; |
a59ec1e7 MH |
284 | goto err; |
285 | } | |
286 | ||
287 | led_dat->cdev.name = cur_led->name; | |
288 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
289 | led_dat->cdev.brightness_set = adp8870_led_set; | |
290 | led_dat->cdev.brightness = LED_OFF; | |
291 | led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; | |
292 | led_dat->client = client; | |
293 | led_dat->new_brightness = LED_OFF; | |
294 | INIT_WORK(&led_dat->work, adp8870_led_work); | |
295 | ||
296 | ret = led_classdev_register(&client->dev, &led_dat->cdev); | |
297 | if (ret) { | |
298 | dev_err(&client->dev, "failed to register LED %d\n", | |
299 | led_dat->id); | |
300 | goto err; | |
301 | } | |
302 | ||
303 | ret = adp8870_led_setup(led_dat); | |
304 | if (ret) { | |
305 | dev_err(&client->dev, "failed to write\n"); | |
306 | i++; | |
307 | goto err; | |
308 | } | |
309 | } | |
310 | ||
311 | data->led = led; | |
312 | ||
313 | return 0; | |
314 | ||
315 | err: | |
316 | for (i = i - 1; i >= 0; --i) { | |
317 | led_classdev_unregister(&led[i].cdev); | |
318 | cancel_work_sync(&led[i].work); | |
319 | } | |
320 | ||
a59ec1e7 MH |
321 | return ret; |
322 | } | |
323 | ||
7e4b9d0b | 324 | static int adp8870_led_remove(struct i2c_client *client) |
a59ec1e7 MH |
325 | { |
326 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 327 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
328 | struct adp8870_bl *data = i2c_get_clientdata(client); |
329 | int i; | |
330 | ||
331 | for (i = 0; i < pdata->num_leds; i++) { | |
332 | led_classdev_unregister(&data->led[i].cdev); | |
333 | cancel_work_sync(&data->led[i].work); | |
334 | } | |
335 | ||
a59ec1e7 MH |
336 | return 0; |
337 | } | |
338 | #else | |
1b9e450d | 339 | static int adp8870_led_probe(struct i2c_client *client) |
a59ec1e7 MH |
340 | { |
341 | return 0; | |
342 | } | |
343 | ||
7e4b9d0b | 344 | static int adp8870_led_remove(struct i2c_client *client) |
a59ec1e7 MH |
345 | { |
346 | return 0; | |
347 | } | |
348 | #endif | |
349 | ||
350 | static int adp8870_bl_set(struct backlight_device *bl, int brightness) | |
351 | { | |
352 | struct adp8870_bl *data = bl_get_data(bl); | |
353 | struct i2c_client *client = data->client; | |
354 | int ret = 0; | |
355 | ||
356 | if (data->pdata->en_ambl_sens) { | |
357 | if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { | |
358 | /* Disable Ambient Light auto adjust */ | |
359 | ret = adp8870_clr_bits(client, ADP8870_MDCR, | |
360 | CMP_AUTOEN); | |
361 | if (ret) | |
362 | return ret; | |
363 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
364 | if (ret) | |
365 | return ret; | |
366 | } else { | |
367 | /* | |
368 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust | |
369 | * restore daylight l1 sysfs brightness | |
370 | */ | |
371 | ret = adp8870_write(client, ADP8870_BLMX1, | |
372 | data->cached_daylight_max); | |
373 | if (ret) | |
374 | return ret; | |
375 | ||
376 | ret = adp8870_set_bits(client, ADP8870_MDCR, | |
377 | CMP_AUTOEN); | |
378 | if (ret) | |
379 | return ret; | |
380 | } | |
381 | } else { | |
382 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
383 | if (ret) | |
384 | return ret; | |
385 | } | |
386 | ||
387 | if (data->current_brightness && brightness == 0) | |
388 | ret = adp8870_set_bits(client, | |
389 | ADP8870_MDCR, DIM_EN); | |
390 | else if (data->current_brightness == 0 && brightness) | |
391 | ret = adp8870_clr_bits(client, | |
392 | ADP8870_MDCR, DIM_EN); | |
393 | ||
394 | if (!ret) | |
395 | data->current_brightness = brightness; | |
396 | ||
397 | return ret; | |
398 | } | |
399 | ||
400 | static int adp8870_bl_update_status(struct backlight_device *bl) | |
401 | { | |
402 | int brightness = bl->props.brightness; | |
fe9a8623 | 403 | |
a59ec1e7 MH |
404 | if (bl->props.power != FB_BLANK_UNBLANK) |
405 | brightness = 0; | |
406 | ||
407 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
408 | brightness = 0; | |
409 | ||
410 | return adp8870_bl_set(bl, brightness); | |
411 | } | |
412 | ||
413 | static int adp8870_bl_get_brightness(struct backlight_device *bl) | |
414 | { | |
415 | struct adp8870_bl *data = bl_get_data(bl); | |
416 | ||
417 | return data->current_brightness; | |
418 | } | |
419 | ||
420 | static const struct backlight_ops adp8870_bl_ops = { | |
421 | .update_status = adp8870_bl_update_status, | |
422 | .get_brightness = adp8870_bl_get_brightness, | |
423 | }; | |
424 | ||
425 | static int adp8870_bl_setup(struct backlight_device *bl) | |
426 | { | |
427 | struct adp8870_bl *data = bl_get_data(bl); | |
428 | struct i2c_client *client = data->client; | |
429 | struct adp8870_backlight_platform_data *pdata = data->pdata; | |
430 | int ret = 0; | |
431 | ||
432 | ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); | |
433 | if (ret) | |
434 | return ret; | |
435 | ||
436 | ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); | |
437 | if (ret) | |
438 | return ret; | |
439 | ||
440 | ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); | |
441 | if (ret) | |
442 | return ret; | |
443 | ||
444 | ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); | |
445 | if (ret) | |
446 | return ret; | |
447 | ||
448 | if (pdata->en_ambl_sens) { | |
449 | data->cached_daylight_max = pdata->l1_daylight_max; | |
450 | ret = adp8870_write(client, ADP8870_BLMX2, | |
451 | pdata->l2_bright_max); | |
452 | if (ret) | |
453 | return ret; | |
454 | ret = adp8870_write(client, ADP8870_BLDM2, | |
455 | pdata->l2_bright_dim); | |
456 | if (ret) | |
457 | return ret; | |
458 | ||
459 | ret = adp8870_write(client, ADP8870_BLMX3, | |
460 | pdata->l3_office_max); | |
461 | if (ret) | |
462 | return ret; | |
463 | ret = adp8870_write(client, ADP8870_BLDM3, | |
464 | pdata->l3_office_dim); | |
465 | if (ret) | |
466 | return ret; | |
467 | ||
468 | ret = adp8870_write(client, ADP8870_BLMX4, | |
469 | pdata->l4_indoor_max); | |
470 | if (ret) | |
471 | return ret; | |
472 | ||
473 | ret = adp8870_write(client, ADP8870_BLDM4, | |
474 | pdata->l4_indor_dim); | |
475 | if (ret) | |
476 | return ret; | |
477 | ||
478 | ret = adp8870_write(client, ADP8870_BLMX5, | |
479 | pdata->l5_dark_max); | |
480 | if (ret) | |
481 | return ret; | |
482 | ||
483 | ret = adp8870_write(client, ADP8870_BLDM5, | |
484 | pdata->l5_dark_dim); | |
485 | if (ret) | |
486 | return ret; | |
487 | ||
488 | ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); | |
489 | if (ret) | |
490 | return ret; | |
491 | ||
492 | ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); | |
497 | if (ret) | |
498 | return ret; | |
499 | ||
500 | ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); | |
501 | if (ret) | |
502 | return ret; | |
503 | ||
504 | ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); | |
505 | if (ret) | |
506 | return ret; | |
507 | ||
508 | ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); | |
509 | if (ret) | |
510 | return ret; | |
511 | ||
512 | ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); | |
513 | if (ret) | |
514 | return ret; | |
515 | ||
516 | ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); | |
517 | if (ret) | |
518 | return ret; | |
519 | ||
520 | ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | | |
521 | L3_EN | L2_EN); | |
522 | if (ret) | |
523 | return ret; | |
524 | ||
525 | ret = adp8870_write(client, ADP8870_CMP_CTL, | |
526 | ALS_CMPR_CFG_VAL(pdata->abml_filt)); | |
527 | if (ret) | |
528 | return ret; | |
529 | } | |
530 | ||
531 | ret = adp8870_write(client, ADP8870_CFGR, | |
532 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
533 | if (ret) | |
534 | return ret; | |
535 | ||
536 | ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, | |
537 | pdata->bl_fade_out)); | |
538 | if (ret) | |
539 | return ret; | |
540 | /* | |
541 | * ADP8870 Rev0 requires GDWN_DIS bit set | |
542 | */ | |
543 | ||
544 | ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | | |
545 | (data->revid == 0 ? GDWN_DIS : 0)); | |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | static ssize_t adp8870_show(struct device *dev, char *buf, int reg) | |
551 | { | |
552 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
553 | int error; | |
554 | uint8_t reg_val; | |
555 | ||
556 | mutex_lock(&data->lock); | |
557 | error = adp8870_read(data->client, reg, ®_val); | |
558 | mutex_unlock(&data->lock); | |
559 | ||
560 | if (error < 0) | |
561 | return error; | |
562 | ||
563 | return sprintf(buf, "%u\n", reg_val); | |
564 | } | |
565 | ||
566 | static ssize_t adp8870_store(struct device *dev, const char *buf, | |
567 | size_t count, int reg) | |
568 | { | |
569 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
570 | unsigned long val; | |
571 | int ret; | |
572 | ||
dc406f56 | 573 | ret = kstrtoul(buf, 10, &val); |
a59ec1e7 MH |
574 | if (ret) |
575 | return ret; | |
576 | ||
577 | mutex_lock(&data->lock); | |
578 | adp8870_write(data->client, reg, val); | |
579 | mutex_unlock(&data->lock); | |
580 | ||
581 | return count; | |
582 | } | |
583 | ||
584 | static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, | |
585 | struct device_attribute *attr, char *buf) | |
586 | { | |
587 | return adp8870_show(dev, buf, ADP8870_BLMX5); | |
588 | } | |
589 | ||
590 | static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, | |
591 | struct device_attribute *attr, const char *buf, size_t count) | |
592 | { | |
593 | return adp8870_store(dev, buf, count, ADP8870_BLMX5); | |
594 | } | |
595 | static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, | |
596 | adp8870_bl_l5_dark_max_store); | |
597 | ||
598 | ||
599 | static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, | |
600 | struct device_attribute *attr, char *buf) | |
601 | { | |
602 | return adp8870_show(dev, buf, ADP8870_BLMX4); | |
603 | } | |
604 | ||
605 | static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, | |
606 | struct device_attribute *attr, const char *buf, size_t count) | |
607 | { | |
608 | return adp8870_store(dev, buf, count, ADP8870_BLMX4); | |
609 | } | |
610 | static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, | |
611 | adp8870_bl_l4_indoor_max_store); | |
612 | ||
613 | ||
614 | static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, | |
615 | struct device_attribute *attr, char *buf) | |
616 | { | |
617 | return adp8870_show(dev, buf, ADP8870_BLMX3); | |
618 | } | |
619 | ||
620 | static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, | |
621 | struct device_attribute *attr, const char *buf, size_t count) | |
622 | { | |
623 | return adp8870_store(dev, buf, count, ADP8870_BLMX3); | |
624 | } | |
625 | ||
626 | static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, | |
627 | adp8870_bl_l3_office_max_store); | |
628 | ||
629 | static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, | |
630 | struct device_attribute *attr, char *buf) | |
631 | { | |
632 | return adp8870_show(dev, buf, ADP8870_BLMX2); | |
633 | } | |
634 | ||
635 | static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, | |
636 | struct device_attribute *attr, const char *buf, size_t count) | |
637 | { | |
638 | return adp8870_store(dev, buf, count, ADP8870_BLMX2); | |
639 | } | |
640 | static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, | |
641 | adp8870_bl_l2_bright_max_store); | |
642 | ||
643 | static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, | |
644 | struct device_attribute *attr, char *buf) | |
645 | { | |
646 | return adp8870_show(dev, buf, ADP8870_BLMX1); | |
647 | } | |
648 | ||
649 | static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, | |
650 | struct device_attribute *attr, const char *buf, size_t count) | |
651 | { | |
652 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
dc406f56 | 653 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
fe9a8623 | 654 | |
a59ec1e7 MH |
655 | if (ret) |
656 | return ret; | |
657 | ||
658 | return adp8870_store(dev, buf, count, ADP8870_BLMX1); | |
659 | } | |
660 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, | |
661 | adp8870_bl_l1_daylight_max_store); | |
662 | ||
663 | static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, | |
664 | struct device_attribute *attr, char *buf) | |
665 | { | |
666 | return adp8870_show(dev, buf, ADP8870_BLDM5); | |
667 | } | |
668 | ||
669 | static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, | |
670 | struct device_attribute *attr, | |
671 | const char *buf, size_t count) | |
672 | { | |
673 | return adp8870_store(dev, buf, count, ADP8870_BLDM5); | |
674 | } | |
675 | static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, | |
676 | adp8870_bl_l5_dark_dim_store); | |
677 | ||
678 | static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, | |
679 | struct device_attribute *attr, char *buf) | |
680 | { | |
681 | return adp8870_show(dev, buf, ADP8870_BLDM4); | |
682 | } | |
683 | ||
684 | static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, | |
685 | struct device_attribute *attr, | |
686 | const char *buf, size_t count) | |
687 | { | |
688 | return adp8870_store(dev, buf, count, ADP8870_BLDM4); | |
689 | } | |
690 | static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, | |
691 | adp8870_bl_l4_indoor_dim_store); | |
692 | ||
693 | ||
694 | static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, | |
695 | struct device_attribute *attr, char *buf) | |
696 | { | |
697 | return adp8870_show(dev, buf, ADP8870_BLDM3); | |
698 | } | |
699 | ||
700 | static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, | |
701 | struct device_attribute *attr, | |
702 | const char *buf, size_t count) | |
703 | { | |
704 | return adp8870_store(dev, buf, count, ADP8870_BLDM3); | |
705 | } | |
706 | static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, | |
707 | adp8870_bl_l3_office_dim_store); | |
708 | ||
709 | static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, | |
710 | struct device_attribute *attr, char *buf) | |
711 | { | |
712 | return adp8870_show(dev, buf, ADP8870_BLDM2); | |
713 | } | |
714 | ||
715 | static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, | |
716 | struct device_attribute *attr, | |
717 | const char *buf, size_t count) | |
718 | { | |
719 | return adp8870_store(dev, buf, count, ADP8870_BLDM2); | |
720 | } | |
721 | static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, | |
722 | adp8870_bl_l2_bright_dim_store); | |
723 | ||
724 | static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, | |
725 | struct device_attribute *attr, char *buf) | |
726 | { | |
727 | return adp8870_show(dev, buf, ADP8870_BLDM1); | |
728 | } | |
729 | ||
730 | static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, | |
731 | struct device_attribute *attr, | |
732 | const char *buf, size_t count) | |
733 | { | |
734 | return adp8870_store(dev, buf, count, ADP8870_BLDM1); | |
735 | } | |
736 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, | |
737 | adp8870_bl_l1_daylight_dim_store); | |
738 | ||
739 | #ifdef ADP8870_EXT_FEATURES | |
740 | static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, | |
741 | struct device_attribute *attr, char *buf) | |
742 | { | |
743 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
744 | int error; | |
745 | uint8_t reg_val; | |
746 | uint16_t ret_val; | |
747 | ||
748 | mutex_lock(&data->lock); | |
749 | error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); | |
750 | if (error < 0) { | |
751 | mutex_unlock(&data->lock); | |
752 | return error; | |
753 | } | |
754 | ret_val = reg_val; | |
755 | error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); | |
756 | mutex_unlock(&data->lock); | |
757 | ||
758 | if (error < 0) | |
759 | return error; | |
760 | ||
761 | /* Return 13-bit conversion value for the first light sensor */ | |
762 | ret_val += (reg_val & 0x1F) << 8; | |
763 | ||
764 | return sprintf(buf, "%u\n", ret_val); | |
765 | } | |
766 | static DEVICE_ATTR(ambient_light_level, 0444, | |
767 | adp8870_bl_ambient_light_level_show, NULL); | |
768 | ||
769 | static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, | |
770 | struct device_attribute *attr, char *buf) | |
771 | { | |
772 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
773 | int error; | |
774 | uint8_t reg_val; | |
775 | ||
776 | mutex_lock(&data->lock); | |
777 | error = adp8870_read(data->client, ADP8870_CFGR, ®_val); | |
778 | mutex_unlock(&data->lock); | |
779 | ||
780 | if (error < 0) | |
781 | return error; | |
782 | ||
783 | return sprintf(buf, "%u\n", | |
784 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); | |
785 | } | |
786 | ||
787 | static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, | |
788 | struct device_attribute *attr, | |
789 | const char *buf, size_t count) | |
790 | { | |
791 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
792 | unsigned long val; | |
793 | uint8_t reg_val; | |
794 | int ret; | |
795 | ||
dc406f56 | 796 | ret = kstrtoul(buf, 10, &val); |
a59ec1e7 MH |
797 | if (ret) |
798 | return ret; | |
799 | ||
800 | if (val == 0) { | |
801 | /* Enable automatic ambient light sensing */ | |
802 | adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); | |
803 | } else if ((val > 0) && (val < 6)) { | |
804 | /* Disable automatic ambient light sensing */ | |
805 | adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); | |
806 | ||
807 | /* Set user supplied ambient light zone */ | |
808 | mutex_lock(&data->lock); | |
86c68e2f AB |
809 | ret = adp8870_read(data->client, ADP8870_CFGR, ®_val); |
810 | if (!ret) { | |
811 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); | |
812 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; | |
813 | adp8870_write(data->client, ADP8870_CFGR, reg_val); | |
814 | } | |
a59ec1e7 MH |
815 | mutex_unlock(&data->lock); |
816 | } | |
817 | ||
818 | return count; | |
819 | } | |
820 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
821 | adp8870_bl_ambient_light_zone_show, | |
822 | adp8870_bl_ambient_light_zone_store); | |
823 | #endif | |
824 | ||
825 | static struct attribute *adp8870_bl_attributes[] = { | |
826 | &dev_attr_l5_dark_max.attr, | |
827 | &dev_attr_l5_dark_dim.attr, | |
828 | &dev_attr_l4_indoor_max.attr, | |
829 | &dev_attr_l4_indoor_dim.attr, | |
830 | &dev_attr_l3_office_max.attr, | |
831 | &dev_attr_l3_office_dim.attr, | |
832 | &dev_attr_l2_bright_max.attr, | |
833 | &dev_attr_l2_bright_dim.attr, | |
834 | &dev_attr_l1_daylight_max.attr, | |
835 | &dev_attr_l1_daylight_dim.attr, | |
836 | #ifdef ADP8870_EXT_FEATURES | |
837 | &dev_attr_ambient_light_level.attr, | |
838 | &dev_attr_ambient_light_zone.attr, | |
839 | #endif | |
840 | NULL | |
841 | }; | |
842 | ||
843 | static const struct attribute_group adp8870_bl_attr_group = { | |
844 | .attrs = adp8870_bl_attributes, | |
845 | }; | |
846 | ||
1b9e450d | 847 | static int adp8870_probe(struct i2c_client *client, |
a59ec1e7 MH |
848 | const struct i2c_device_id *id) |
849 | { | |
850 | struct backlight_properties props; | |
851 | struct backlight_device *bl; | |
852 | struct adp8870_bl *data; | |
853 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 854 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
855 | uint8_t reg_val; |
856 | int ret; | |
857 | ||
858 | if (!i2c_check_functionality(client->adapter, | |
859 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
860 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
861 | return -EIO; | |
862 | } | |
863 | ||
864 | if (!pdata) { | |
865 | dev_err(&client->dev, "no platform data?\n"); | |
866 | return -EINVAL; | |
867 | } | |
868 | ||
869 | ret = adp8870_read(client, ADP8870_MFDVID, ®_val); | |
870 | if (ret < 0) | |
871 | return -EIO; | |
872 | ||
873 | if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { | |
874 | dev_err(&client->dev, "failed to probe\n"); | |
875 | return -ENODEV; | |
876 | } | |
877 | ||
91cdb239 | 878 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
a59ec1e7 MH |
879 | if (data == NULL) |
880 | return -ENOMEM; | |
881 | ||
882 | data->revid = ADP8870_DEVID(reg_val); | |
883 | data->client = client; | |
884 | data->pdata = pdata; | |
885 | data->id = id->driver_data; | |
886 | data->current_brightness = 0; | |
887 | i2c_set_clientdata(client, data); | |
888 | ||
889 | mutex_init(&data->lock); | |
890 | ||
891 | memset(&props, 0, sizeof(props)); | |
e1bbd19b | 892 | props.type = BACKLIGHT_RAW; |
a59ec1e7 | 893 | props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; |
568ee6c3 JH |
894 | bl = devm_backlight_device_register(&client->dev, |
895 | dev_driver_string(&client->dev), | |
896 | &client->dev, data, &adp8870_bl_ops, &props); | |
a59ec1e7 MH |
897 | if (IS_ERR(bl)) { |
898 | dev_err(&client->dev, "failed to register backlight\n"); | |
91cdb239 | 899 | return PTR_ERR(bl); |
a59ec1e7 MH |
900 | } |
901 | ||
902 | data->bl = bl; | |
903 | ||
8541b827 | 904 | if (pdata->en_ambl_sens) { |
a59ec1e7 MH |
905 | ret = sysfs_create_group(&bl->dev.kobj, |
906 | &adp8870_bl_attr_group); | |
8541b827 JH |
907 | if (ret) { |
908 | dev_err(&client->dev, "failed to register sysfs\n"); | |
568ee6c3 | 909 | return ret; |
8541b827 | 910 | } |
a59ec1e7 MH |
911 | } |
912 | ||
913 | ret = adp8870_bl_setup(bl); | |
914 | if (ret) { | |
915 | ret = -EIO; | |
916 | goto out; | |
917 | } | |
918 | ||
919 | backlight_update_status(bl); | |
920 | ||
921 | dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); | |
922 | ||
923 | if (pdata->num_leds) | |
924 | adp8870_led_probe(client); | |
925 | ||
926 | return 0; | |
927 | ||
928 | out: | |
929 | if (data->pdata->en_ambl_sens) | |
930 | sysfs_remove_group(&data->bl->dev.kobj, | |
931 | &adp8870_bl_attr_group); | |
a59ec1e7 MH |
932 | |
933 | return ret; | |
934 | } | |
935 | ||
7e4b9d0b | 936 | static int adp8870_remove(struct i2c_client *client) |
a59ec1e7 MH |
937 | { |
938 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
939 | ||
940 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); | |
941 | ||
942 | if (data->led) | |
943 | adp8870_led_remove(client); | |
944 | ||
945 | if (data->pdata->en_ambl_sens) | |
946 | sysfs_remove_group(&data->bl->dev.kobj, | |
947 | &adp8870_bl_attr_group); | |
948 | ||
a59ec1e7 MH |
949 | return 0; |
950 | } | |
951 | ||
3cd4291a JH |
952 | #ifdef CONFIG_PM_SLEEP |
953 | static int adp8870_i2c_suspend(struct device *dev) | |
a59ec1e7 | 954 | { |
3cd4291a JH |
955 | struct i2c_client *client = to_i2c_client(dev); |
956 | ||
a59ec1e7 MH |
957 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
3cd4291a | 962 | static int adp8870_i2c_resume(struct device *dev) |
a59ec1e7 | 963 | { |
3cd4291a JH |
964 | struct i2c_client *client = to_i2c_client(dev); |
965 | ||
5eb02c01 | 966 | adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); |
a59ec1e7 MH |
967 | |
968 | return 0; | |
969 | } | |
a59ec1e7 MH |
970 | #endif |
971 | ||
3cd4291a JH |
972 | static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, |
973 | adp8870_i2c_resume); | |
974 | ||
a59ec1e7 MH |
975 | static const struct i2c_device_id adp8870_id[] = { |
976 | { "adp8870", 0 }, | |
977 | { } | |
978 | }; | |
979 | MODULE_DEVICE_TABLE(i2c, adp8870_id); | |
980 | ||
981 | static struct i2c_driver adp8870_driver = { | |
982 | .driver = { | |
3cd4291a JH |
983 | .name = KBUILD_MODNAME, |
984 | .pm = &adp8870_i2c_pm_ops, | |
a59ec1e7 MH |
985 | }, |
986 | .probe = adp8870_probe, | |
d1723fa2 | 987 | .remove = adp8870_remove, |
a59ec1e7 MH |
988 | .id_table = adp8870_id, |
989 | }; | |
990 | ||
81ce6864 | 991 | module_i2c_driver(adp8870_driver); |
a59ec1e7 MH |
992 | |
993 | MODULE_LICENSE("GPL v2"); | |
0b193400 | 994 | MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); |
a59ec1e7 | 995 | MODULE_DESCRIPTION("ADP8870 Backlight driver"); |