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80503b23 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
82fd53b7 MH |
2 | /* |
3 | * Backlight driver for Analog Devices ADP8860 Backlight Devices | |
4 | * | |
5 | * Copyright 2009-2010 Analog Devices Inc. | |
82fd53b7 MH |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
82fd53b7 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> | |
3f43f8b2 | 17 | #include <linux/slab.h> |
82fd53b7 MH |
18 | #include <linux/workqueue.h> |
19 | ||
8476d6cd | 20 | #include <linux/platform_data/adp8860.h> |
82fd53b7 MH |
21 | #define ADP8860_EXT_FEATURES |
22 | #define ADP8860_USE_LEDS | |
23 | ||
24 | #define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */ | |
25 | #define ADP8860_MDCR 0x01 /* Device mode and status */ | |
26 | #define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */ | |
27 | #define ADP8860_INTR_EN 0x03 /* Interrupts enable */ | |
28 | #define ADP8860_CFGR 0x04 /* Configuration register */ | |
29 | #define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */ | |
30 | #define ADP8860_BLOFF 0x06 /* Backlight off timeout */ | |
31 | #define ADP8860_BLDIM 0x07 /* Backlight dim timeout */ | |
32 | #define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */ | |
33 | #define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */ | |
34 | #define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */ | |
35 | #define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */ | |
36 | #define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */ | |
37 | #define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */ | |
38 | #define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */ | |
39 | #define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */ | |
40 | #define ADP8860_ISCC 0x10 /* Independent sink current control register */ | |
41 | #define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */ | |
42 | #define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */ | |
43 | #define ADP8860_ISCF 0x13 /* Independent sink current fade register */ | |
44 | #define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */ | |
45 | #define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */ | |
46 | #define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */ | |
47 | #define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */ | |
48 | #define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */ | |
49 | #define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */ | |
50 | #define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */ | |
51 | #define ADP8860_CCFG 0x1B /* Comparator configuration */ | |
52 | #define ADP8860_CCFG2 0x1C /* Second comparator configuration */ | |
53 | #define ADP8860_L2_TRP 0x1D /* L2 comparator reference */ | |
54 | #define ADP8860_L2_HYS 0x1E /* L2 hysteresis */ | |
55 | #define ADP8860_L3_TRP 0x1F /* L3 comparator reference */ | |
56 | #define ADP8860_L3_HYS 0x20 /* L3 hysteresis */ | |
57 | #define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */ | |
58 | #define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */ | |
59 | #define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */ | |
60 | #define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */ | |
61 | ||
62 | #define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */ | |
c7c06d8a MH |
63 | #define ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */ |
64 | #define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer ID */ | |
65 | ||
82fd53b7 MH |
66 | #define ADP8860_DEVID(x) ((x) & 0xF) |
67 | #define ADP8860_MANID(x) ((x) >> 4) | |
68 | ||
69 | /* MDCR Device mode and status */ | |
70 | #define INT_CFG (1 << 6) | |
71 | #define NSTBY (1 << 5) | |
72 | #define DIM_EN (1 << 4) | |
c7c06d8a | 73 | #define GDWN_DIS (1 << 3) |
82fd53b7 MH |
74 | #define SIS_EN (1 << 2) |
75 | #define CMP_AUTOEN (1 << 1) | |
76 | #define BLEN (1 << 0) | |
77 | ||
78 | /* ADP8860_CCFG Main ALS comparator level enable */ | |
79 | #define L3_EN (1 << 1) | |
80 | #define L2_EN (1 << 0) | |
81 | ||
82 | #define CFGR_BLV_SHIFT 3 | |
83 | #define CFGR_BLV_MASK 0x3 | |
84 | #define ADP8860_FLAG_LED_MASK 0xFF | |
85 | ||
86 | #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) | |
87 | #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) | |
88 | #define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5) | |
89 | ||
c7c06d8a MH |
90 | enum { |
91 | adp8860, | |
92 | adp8861, | |
93 | adp8863 | |
94 | }; | |
95 | ||
82fd53b7 MH |
96 | struct adp8860_led { |
97 | struct led_classdev cdev; | |
98 | struct work_struct work; | |
99 | struct i2c_client *client; | |
100 | enum led_brightness new_brightness; | |
101 | int id; | |
102 | int flags; | |
103 | }; | |
104 | ||
105 | struct adp8860_bl { | |
106 | struct i2c_client *client; | |
107 | struct backlight_device *bl; | |
108 | struct adp8860_led *led; | |
109 | struct adp8860_backlight_platform_data *pdata; | |
110 | struct mutex lock; | |
111 | unsigned long cached_daylight_max; | |
112 | int id; | |
113 | int revid; | |
114 | int current_brightness; | |
c7c06d8a MH |
115 | unsigned en_ambl_sens:1; |
116 | unsigned gdwn_dis:1; | |
82fd53b7 MH |
117 | }; |
118 | ||
119 | static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val) | |
120 | { | |
121 | int ret; | |
122 | ||
123 | ret = i2c_smbus_read_byte_data(client, reg); | |
124 | if (ret < 0) { | |
125 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
126 | return ret; | |
127 | } | |
128 | ||
129 | *val = (uint8_t)ret; | |
130 | return 0; | |
131 | } | |
132 | ||
82fd53b7 MH |
133 | static int adp8860_write(struct i2c_client *client, u8 reg, u8 val) |
134 | { | |
135 | return i2c_smbus_write_byte_data(client, reg, val); | |
136 | } | |
137 | ||
138 | static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
139 | { | |
140 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
141 | uint8_t reg_val; | |
142 | int ret; | |
143 | ||
144 | mutex_lock(&data->lock); | |
145 | ||
146 | ret = adp8860_read(client, reg, ®_val); | |
147 | ||
36c3e759 | 148 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
82fd53b7 MH |
149 | reg_val |= bit_mask; |
150 | ret = adp8860_write(client, reg, reg_val); | |
151 | } | |
152 | ||
153 | mutex_unlock(&data->lock); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
158 | { | |
159 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
160 | uint8_t reg_val; | |
161 | int ret; | |
162 | ||
163 | mutex_lock(&data->lock); | |
164 | ||
165 | ret = adp8860_read(client, reg, ®_val); | |
166 | ||
167 | if (!ret && (reg_val & bit_mask)) { | |
168 | reg_val &= ~bit_mask; | |
169 | ret = adp8860_write(client, reg, reg_val); | |
170 | } | |
171 | ||
172 | mutex_unlock(&data->lock); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Independent sink / LED | |
178 | */ | |
179 | #if defined(ADP8860_USE_LEDS) | |
180 | static void adp8860_led_work(struct work_struct *work) | |
181 | { | |
182 | struct adp8860_led *led = container_of(work, struct adp8860_led, work); | |
5e548f0f | 183 | |
82fd53b7 MH |
184 | adp8860_write(led->client, ADP8860_ISC1 - led->id + 1, |
185 | led->new_brightness >> 1); | |
186 | } | |
187 | ||
188 | static void adp8860_led_set(struct led_classdev *led_cdev, | |
189 | enum led_brightness value) | |
190 | { | |
191 | struct adp8860_led *led; | |
192 | ||
193 | led = container_of(led_cdev, struct adp8860_led, cdev); | |
194 | led->new_brightness = value; | |
195 | schedule_work(&led->work); | |
196 | } | |
197 | ||
198 | static int adp8860_led_setup(struct adp8860_led *led) | |
199 | { | |
200 | struct i2c_client *client = led->client; | |
201 | int ret = 0; | |
202 | ||
203 | ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0); | |
204 | ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1)); | |
205 | ||
206 | if (led->id > 4) | |
207 | ret |= adp8860_set_bits(client, ADP8860_ISCT1, | |
208 | (led->flags & 0x3) << ((led->id - 5) * 2)); | |
209 | else | |
210 | ret |= adp8860_set_bits(client, ADP8860_ISCT2, | |
211 | (led->flags & 0x3) << ((led->id - 1) * 2)); | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
1b9e450d | 216 | static int adp8860_led_probe(struct i2c_client *client) |
82fd53b7 MH |
217 | { |
218 | struct adp8860_backlight_platform_data *pdata = | |
c512794c | 219 | dev_get_platdata(&client->dev); |
82fd53b7 MH |
220 | struct adp8860_bl *data = i2c_get_clientdata(client); |
221 | struct adp8860_led *led, *led_dat; | |
222 | struct led_info *cur_led; | |
223 | int ret, i; | |
224 | ||
a86854d0 | 225 | led = devm_kcalloc(&client->dev, pdata->num_leds, sizeof(*led), |
58875ea9 | 226 | GFP_KERNEL); |
ba464d0c | 227 | if (led == NULL) |
82fd53b7 | 228 | return -ENOMEM; |
82fd53b7 MH |
229 | |
230 | ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law); | |
231 | ret = adp8860_write(client, ADP8860_ISCT1, | |
232 | (pdata->led_on_time & 0x3) << 6); | |
233 | ret |= adp8860_write(client, ADP8860_ISCF, | |
234 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); | |
235 | ||
236 | if (ret) { | |
237 | dev_err(&client->dev, "failed to write\n"); | |
58875ea9 | 238 | return ret; |
82fd53b7 MH |
239 | } |
240 | ||
241 | for (i = 0; i < pdata->num_leds; ++i) { | |
242 | cur_led = &pdata->leds[i]; | |
243 | led_dat = &led[i]; | |
244 | ||
245 | led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK; | |
246 | ||
247 | if (led_dat->id > 7 || led_dat->id < 1) { | |
248 | dev_err(&client->dev, "Invalid LED ID %d\n", | |
249 | led_dat->id); | |
84eba9ed | 250 | ret = -EINVAL; |
82fd53b7 MH |
251 | goto err; |
252 | } | |
253 | ||
254 | if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { | |
255 | dev_err(&client->dev, "LED %d used by Backlight\n", | |
256 | led_dat->id); | |
84eba9ed | 257 | ret = -EBUSY; |
82fd53b7 MH |
258 | goto err; |
259 | } | |
260 | ||
261 | led_dat->cdev.name = cur_led->name; | |
262 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
263 | led_dat->cdev.brightness_set = adp8860_led_set; | |
264 | led_dat->cdev.brightness = LED_OFF; | |
265 | led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; | |
266 | led_dat->client = client; | |
267 | led_dat->new_brightness = LED_OFF; | |
268 | INIT_WORK(&led_dat->work, adp8860_led_work); | |
269 | ||
270 | ret = led_classdev_register(&client->dev, &led_dat->cdev); | |
271 | if (ret) { | |
272 | dev_err(&client->dev, "failed to register LED %d\n", | |
273 | led_dat->id); | |
274 | goto err; | |
275 | } | |
276 | ||
277 | ret = adp8860_led_setup(led_dat); | |
278 | if (ret) { | |
279 | dev_err(&client->dev, "failed to write\n"); | |
280 | i++; | |
281 | goto err; | |
282 | } | |
283 | } | |
284 | ||
285 | data->led = led; | |
286 | ||
287 | return 0; | |
288 | ||
289 | err: | |
290 | for (i = i - 1; i >= 0; --i) { | |
291 | led_classdev_unregister(&led[i].cdev); | |
292 | cancel_work_sync(&led[i].work); | |
293 | } | |
294 | ||
82fd53b7 MH |
295 | return ret; |
296 | } | |
297 | ||
7e4b9d0b | 298 | static int adp8860_led_remove(struct i2c_client *client) |
82fd53b7 MH |
299 | { |
300 | struct adp8860_backlight_platform_data *pdata = | |
c512794c | 301 | dev_get_platdata(&client->dev); |
82fd53b7 MH |
302 | struct adp8860_bl *data = i2c_get_clientdata(client); |
303 | int i; | |
304 | ||
305 | for (i = 0; i < pdata->num_leds; i++) { | |
306 | led_classdev_unregister(&data->led[i].cdev); | |
307 | cancel_work_sync(&data->led[i].work); | |
308 | } | |
309 | ||
82fd53b7 MH |
310 | return 0; |
311 | } | |
312 | #else | |
1b9e450d | 313 | static int adp8860_led_probe(struct i2c_client *client) |
82fd53b7 MH |
314 | { |
315 | return 0; | |
316 | } | |
317 | ||
7e4b9d0b | 318 | static int adp8860_led_remove(struct i2c_client *client) |
82fd53b7 MH |
319 | { |
320 | return 0; | |
321 | } | |
322 | #endif | |
323 | ||
324 | static int adp8860_bl_set(struct backlight_device *bl, int brightness) | |
325 | { | |
326 | struct adp8860_bl *data = bl_get_data(bl); | |
327 | struct i2c_client *client = data->client; | |
328 | int ret = 0; | |
329 | ||
c7c06d8a | 330 | if (data->en_ambl_sens) { |
82fd53b7 MH |
331 | if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) { |
332 | /* Disable Ambient Light auto adjust */ | |
333 | ret |= adp8860_clr_bits(client, ADP8860_MDCR, | |
334 | CMP_AUTOEN); | |
335 | ret |= adp8860_write(client, ADP8860_BLMX1, brightness); | |
336 | } else { | |
337 | /* | |
338 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust | |
339 | * restore daylight l1 sysfs brightness | |
340 | */ | |
341 | ret |= adp8860_write(client, ADP8860_BLMX1, | |
342 | data->cached_daylight_max); | |
343 | ret |= adp8860_set_bits(client, ADP8860_MDCR, | |
344 | CMP_AUTOEN); | |
345 | } | |
346 | } else | |
347 | ret |= adp8860_write(client, ADP8860_BLMX1, brightness); | |
348 | ||
349 | if (data->current_brightness && brightness == 0) | |
350 | ret |= adp8860_set_bits(client, | |
351 | ADP8860_MDCR, DIM_EN); | |
352 | else if (data->current_brightness == 0 && brightness) | |
353 | ret |= adp8860_clr_bits(client, | |
354 | ADP8860_MDCR, DIM_EN); | |
355 | ||
356 | if (!ret) | |
357 | data->current_brightness = brightness; | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | static int adp8860_bl_update_status(struct backlight_device *bl) | |
363 | { | |
364 | int brightness = bl->props.brightness; | |
5e548f0f | 365 | |
82fd53b7 MH |
366 | if (bl->props.power != FB_BLANK_UNBLANK) |
367 | brightness = 0; | |
368 | ||
369 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
370 | brightness = 0; | |
371 | ||
372 | return adp8860_bl_set(bl, brightness); | |
373 | } | |
374 | ||
375 | static int adp8860_bl_get_brightness(struct backlight_device *bl) | |
376 | { | |
377 | struct adp8860_bl *data = bl_get_data(bl); | |
378 | ||
379 | return data->current_brightness; | |
380 | } | |
381 | ||
382 | static const struct backlight_ops adp8860_bl_ops = { | |
383 | .update_status = adp8860_bl_update_status, | |
384 | .get_brightness = adp8860_bl_get_brightness, | |
385 | }; | |
386 | ||
387 | static int adp8860_bl_setup(struct backlight_device *bl) | |
388 | { | |
389 | struct adp8860_bl *data = bl_get_data(bl); | |
390 | struct i2c_client *client = data->client; | |
391 | struct adp8860_backlight_platform_data *pdata = data->pdata; | |
392 | int ret = 0; | |
393 | ||
394 | ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign); | |
395 | ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max); | |
396 | ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim); | |
397 | ||
c7c06d8a | 398 | if (data->en_ambl_sens) { |
82fd53b7 MH |
399 | data->cached_daylight_max = pdata->l1_daylight_max; |
400 | ret |= adp8860_write(client, ADP8860_BLMX2, | |
401 | pdata->l2_office_max); | |
402 | ret |= adp8860_write(client, ADP8860_BLDM2, | |
403 | pdata->l2_office_dim); | |
404 | ret |= adp8860_write(client, ADP8860_BLMX3, | |
405 | pdata->l3_dark_max); | |
406 | ret |= adp8860_write(client, ADP8860_BLDM3, | |
407 | pdata->l3_dark_dim); | |
408 | ||
409 | ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip); | |
410 | ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst); | |
411 | ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip); | |
412 | ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst); | |
413 | ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN | | |
414 | ALS_CCFG_VAL(pdata->abml_filt)); | |
415 | } | |
416 | ||
417 | ret |= adp8860_write(client, ADP8860_CFGR, | |
418 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
419 | ||
420 | ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in, | |
421 | pdata->bl_fade_out)); | |
422 | ||
c7c06d8a MH |
423 | ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY | |
424 | (data->gdwn_dis ? GDWN_DIS : 0)); | |
82fd53b7 MH |
425 | |
426 | return ret; | |
427 | } | |
428 | ||
429 | static ssize_t adp8860_show(struct device *dev, char *buf, int reg) | |
430 | { | |
431 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
432 | int error; | |
433 | uint8_t reg_val; | |
434 | ||
435 | mutex_lock(&data->lock); | |
436 | error = adp8860_read(data->client, reg, ®_val); | |
437 | mutex_unlock(&data->lock); | |
438 | ||
439 | if (error < 0) | |
440 | return error; | |
441 | ||
442 | return sprintf(buf, "%u\n", reg_val); | |
443 | } | |
444 | ||
445 | static ssize_t adp8860_store(struct device *dev, const char *buf, | |
446 | size_t count, int reg) | |
447 | { | |
448 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
449 | unsigned long val; | |
450 | int ret; | |
451 | ||
8dd9d7f2 | 452 | ret = kstrtoul(buf, 10, &val); |
82fd53b7 MH |
453 | if (ret) |
454 | return ret; | |
455 | ||
456 | mutex_lock(&data->lock); | |
457 | adp8860_write(data->client, reg, val); | |
458 | mutex_unlock(&data->lock); | |
459 | ||
460 | return count; | |
461 | } | |
462 | ||
463 | static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev, | |
464 | struct device_attribute *attr, char *buf) | |
465 | { | |
466 | return adp8860_show(dev, buf, ADP8860_BLMX3); | |
467 | } | |
468 | ||
469 | static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev, | |
470 | struct device_attribute *attr, const char *buf, size_t count) | |
471 | { | |
472 | return adp8860_store(dev, buf, count, ADP8860_BLMX3); | |
473 | } | |
474 | ||
475 | static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show, | |
476 | adp8860_bl_l3_dark_max_store); | |
477 | ||
478 | static ssize_t adp8860_bl_l2_office_max_show(struct device *dev, | |
479 | struct device_attribute *attr, char *buf) | |
480 | { | |
481 | return adp8860_show(dev, buf, ADP8860_BLMX2); | |
482 | } | |
483 | ||
484 | static ssize_t adp8860_bl_l2_office_max_store(struct device *dev, | |
485 | struct device_attribute *attr, const char *buf, size_t count) | |
486 | { | |
487 | return adp8860_store(dev, buf, count, ADP8860_BLMX2); | |
488 | } | |
489 | static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show, | |
490 | adp8860_bl_l2_office_max_store); | |
491 | ||
492 | static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev, | |
493 | struct device_attribute *attr, char *buf) | |
494 | { | |
495 | return adp8860_show(dev, buf, ADP8860_BLMX1); | |
496 | } | |
497 | ||
498 | static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, | |
499 | struct device_attribute *attr, const char *buf, size_t count) | |
500 | { | |
501 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
8dd9d7f2 | 502 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
5e548f0f | 503 | |
4f1aa846 MH |
504 | if (ret) |
505 | return ret; | |
82fd53b7 | 506 | |
82fd53b7 MH |
507 | return adp8860_store(dev, buf, count, ADP8860_BLMX1); |
508 | } | |
509 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, | |
510 | adp8860_bl_l1_daylight_max_store); | |
511 | ||
512 | static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev, | |
513 | struct device_attribute *attr, char *buf) | |
514 | { | |
515 | return adp8860_show(dev, buf, ADP8860_BLDM3); | |
516 | } | |
517 | ||
518 | static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev, | |
519 | struct device_attribute *attr, | |
520 | const char *buf, size_t count) | |
521 | { | |
522 | return adp8860_store(dev, buf, count, ADP8860_BLDM3); | |
523 | } | |
524 | static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show, | |
525 | adp8860_bl_l3_dark_dim_store); | |
526 | ||
527 | static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev, | |
528 | struct device_attribute *attr, char *buf) | |
529 | { | |
530 | return adp8860_show(dev, buf, ADP8860_BLDM2); | |
531 | } | |
532 | ||
533 | static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev, | |
534 | struct device_attribute *attr, | |
535 | const char *buf, size_t count) | |
536 | { | |
537 | return adp8860_store(dev, buf, count, ADP8860_BLDM2); | |
538 | } | |
539 | static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show, | |
540 | adp8860_bl_l2_office_dim_store); | |
541 | ||
542 | static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev, | |
543 | struct device_attribute *attr, char *buf) | |
544 | { | |
545 | return adp8860_show(dev, buf, ADP8860_BLDM1); | |
546 | } | |
547 | ||
548 | static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev, | |
549 | struct device_attribute *attr, | |
550 | const char *buf, size_t count) | |
551 | { | |
552 | return adp8860_store(dev, buf, count, ADP8860_BLDM1); | |
553 | } | |
554 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show, | |
555 | adp8860_bl_l1_daylight_dim_store); | |
556 | ||
557 | #ifdef ADP8860_EXT_FEATURES | |
558 | static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev, | |
559 | struct device_attribute *attr, char *buf) | |
560 | { | |
561 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
562 | int error; | |
563 | uint8_t reg_val; | |
564 | uint16_t ret_val; | |
565 | ||
566 | mutex_lock(&data->lock); | |
567 | error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val); | |
02f22c00 AB |
568 | if (!error) { |
569 | ret_val = reg_val; | |
570 | error = adp8860_read(data->client, ADP8860_PH1LEVH, ®_val); | |
571 | } | |
82fd53b7 MH |
572 | mutex_unlock(&data->lock); |
573 | ||
02f22c00 | 574 | if (error) |
82fd53b7 MH |
575 | return error; |
576 | ||
577 | /* Return 13-bit conversion value for the first light sensor */ | |
578 | ret_val += (reg_val & 0x1F) << 8; | |
579 | ||
580 | return sprintf(buf, "%u\n", ret_val); | |
581 | } | |
582 | static DEVICE_ATTR(ambient_light_level, 0444, | |
583 | adp8860_bl_ambient_light_level_show, NULL); | |
584 | ||
585 | static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev, | |
586 | struct device_attribute *attr, char *buf) | |
587 | { | |
588 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
589 | int error; | |
590 | uint8_t reg_val; | |
591 | ||
592 | mutex_lock(&data->lock); | |
593 | error = adp8860_read(data->client, ADP8860_CFGR, ®_val); | |
594 | mutex_unlock(&data->lock); | |
595 | ||
596 | if (error < 0) | |
597 | return error; | |
598 | ||
599 | return sprintf(buf, "%u\n", | |
600 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); | |
601 | } | |
602 | ||
603 | static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, | |
604 | struct device_attribute *attr, | |
605 | const char *buf, size_t count) | |
606 | { | |
607 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
608 | unsigned long val; | |
609 | uint8_t reg_val; | |
610 | int ret; | |
611 | ||
8dd9d7f2 | 612 | ret = kstrtoul(buf, 10, &val); |
82fd53b7 MH |
613 | if (ret) |
614 | return ret; | |
615 | ||
616 | if (val == 0) { | |
617 | /* Enable automatic ambient light sensing */ | |
618 | adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); | |
c7ce2500 | 619 | } else if ((val > 0) && (val <= 3)) { |
82fd53b7 MH |
620 | /* Disable automatic ambient light sensing */ |
621 | adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); | |
622 | ||
623 | /* Set user supplied ambient light zone */ | |
624 | mutex_lock(&data->lock); | |
86c68e2f AB |
625 | ret = adp8860_read(data->client, ADP8860_CFGR, ®_val); |
626 | if (!ret) { | |
627 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); | |
628 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; | |
629 | adp8860_write(data->client, ADP8860_CFGR, reg_val); | |
630 | } | |
82fd53b7 MH |
631 | mutex_unlock(&data->lock); |
632 | } | |
633 | ||
634 | return count; | |
635 | } | |
636 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
637 | adp8860_bl_ambient_light_zone_show, | |
638 | adp8860_bl_ambient_light_zone_store); | |
639 | #endif | |
640 | ||
641 | static struct attribute *adp8860_bl_attributes[] = { | |
642 | &dev_attr_l3_dark_max.attr, | |
643 | &dev_attr_l3_dark_dim.attr, | |
644 | &dev_attr_l2_office_max.attr, | |
645 | &dev_attr_l2_office_dim.attr, | |
646 | &dev_attr_l1_daylight_max.attr, | |
647 | &dev_attr_l1_daylight_dim.attr, | |
648 | #ifdef ADP8860_EXT_FEATURES | |
649 | &dev_attr_ambient_light_level.attr, | |
650 | &dev_attr_ambient_light_zone.attr, | |
651 | #endif | |
652 | NULL | |
653 | }; | |
654 | ||
655 | static const struct attribute_group adp8860_bl_attr_group = { | |
656 | .attrs = adp8860_bl_attributes, | |
657 | }; | |
658 | ||
1b9e450d | 659 | static int adp8860_probe(struct i2c_client *client, |
82fd53b7 MH |
660 | const struct i2c_device_id *id) |
661 | { | |
662 | struct backlight_device *bl; | |
663 | struct adp8860_bl *data; | |
664 | struct adp8860_backlight_platform_data *pdata = | |
c512794c | 665 | dev_get_platdata(&client->dev); |
3f43f8b2 | 666 | struct backlight_properties props; |
82fd53b7 MH |
667 | uint8_t reg_val; |
668 | int ret; | |
669 | ||
670 | if (!i2c_check_functionality(client->adapter, | |
671 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
672 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
673 | return -EIO; | |
674 | } | |
675 | ||
676 | if (!pdata) { | |
677 | dev_err(&client->dev, "no platform data?\n"); | |
678 | return -EINVAL; | |
679 | } | |
680 | ||
58875ea9 | 681 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
c7c06d8a MH |
682 | if (data == NULL) |
683 | return -ENOMEM; | |
684 | ||
82fd53b7 MH |
685 | ret = adp8860_read(client, ADP8860_MFDVID, ®_val); |
686 | if (ret < 0) | |
58875ea9 | 687 | return ret; |
82fd53b7 | 688 | |
c7c06d8a MH |
689 | switch (ADP8860_MANID(reg_val)) { |
690 | case ADP8863_MANUFID: | |
691 | data->gdwn_dis = !!pdata->gdwn_dis; | |
858c5dfc | 692 | /* fall through */ |
c7c06d8a MH |
693 | case ADP8860_MANUFID: |
694 | data->en_ambl_sens = !!pdata->en_ambl_sens; | |
695 | break; | |
696 | case ADP8861_MANUFID: | |
697 | data->gdwn_dis = !!pdata->gdwn_dis; | |
698 | break; | |
699 | default: | |
82fd53b7 | 700 | dev_err(&client->dev, "failed to probe\n"); |
58875ea9 | 701 | return -ENODEV; |
82fd53b7 MH |
702 | } |
703 | ||
82fd53b7 MH |
704 | /* It's confirmed that the DEVID field is actually a REVID */ |
705 | ||
706 | data->revid = ADP8860_DEVID(reg_val); | |
707 | data->client = client; | |
708 | data->pdata = pdata; | |
709 | data->id = id->driver_data; | |
710 | data->current_brightness = 0; | |
711 | i2c_set_clientdata(client, data); | |
712 | ||
3f43f8b2 | 713 | memset(&props, 0, sizeof(props)); |
bb7ca747 | 714 | props.type = BACKLIGHT_RAW; |
3f43f8b2 RD |
715 | props.max_brightness = ADP8860_MAX_BRIGHTNESS; |
716 | ||
82fd53b7 MH |
717 | mutex_init(&data->lock); |
718 | ||
91fa4ee8 JH |
719 | bl = devm_backlight_device_register(&client->dev, |
720 | dev_driver_string(&client->dev), | |
721 | &client->dev, data, &adp8860_bl_ops, &props); | |
82fd53b7 MH |
722 | if (IS_ERR(bl)) { |
723 | dev_err(&client->dev, "failed to register backlight\n"); | |
58875ea9 | 724 | return PTR_ERR(bl); |
82fd53b7 MH |
725 | } |
726 | ||
6b19bad8 | 727 | bl->props.brightness = ADP8860_MAX_BRIGHTNESS; |
82fd53b7 MH |
728 | |
729 | data->bl = bl; | |
730 | ||
c7c06d8a | 731 | if (data->en_ambl_sens) |
82fd53b7 MH |
732 | ret = sysfs_create_group(&bl->dev.kobj, |
733 | &adp8860_bl_attr_group); | |
734 | ||
735 | if (ret) { | |
736 | dev_err(&client->dev, "failed to register sysfs\n"); | |
91fa4ee8 | 737 | return ret; |
82fd53b7 MH |
738 | } |
739 | ||
740 | ret = adp8860_bl_setup(bl); | |
741 | if (ret) { | |
742 | ret = -EIO; | |
743 | goto out; | |
744 | } | |
745 | ||
746 | backlight_update_status(bl); | |
747 | ||
c7c06d8a MH |
748 | dev_info(&client->dev, "%s Rev.%d Backlight\n", |
749 | client->name, data->revid); | |
82fd53b7 MH |
750 | |
751 | if (pdata->num_leds) | |
752 | adp8860_led_probe(client); | |
753 | ||
754 | return 0; | |
755 | ||
756 | out: | |
c7c06d8a | 757 | if (data->en_ambl_sens) |
82fd53b7 MH |
758 | sysfs_remove_group(&data->bl->dev.kobj, |
759 | &adp8860_bl_attr_group); | |
82fd53b7 MH |
760 | |
761 | return ret; | |
762 | } | |
763 | ||
7e4b9d0b | 764 | static int adp8860_remove(struct i2c_client *client) |
82fd53b7 MH |
765 | { |
766 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
767 | ||
768 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); | |
769 | ||
770 | if (data->led) | |
771 | adp8860_led_remove(client); | |
772 | ||
c7c06d8a | 773 | if (data->en_ambl_sens) |
82fd53b7 MH |
774 | sysfs_remove_group(&data->bl->dev.kobj, |
775 | &adp8860_bl_attr_group); | |
776 | ||
82fd53b7 MH |
777 | return 0; |
778 | } | |
779 | ||
cf108b5c JH |
780 | #ifdef CONFIG_PM_SLEEP |
781 | static int adp8860_i2c_suspend(struct device *dev) | |
82fd53b7 | 782 | { |
cf108b5c JH |
783 | struct i2c_client *client = to_i2c_client(dev); |
784 | ||
82fd53b7 MH |
785 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
cf108b5c | 790 | static int adp8860_i2c_resume(struct device *dev) |
82fd53b7 | 791 | { |
cf108b5c JH |
792 | struct i2c_client *client = to_i2c_client(dev); |
793 | ||
5eb02c01 | 794 | adp8860_set_bits(client, ADP8860_MDCR, NSTBY | BLEN); |
82fd53b7 MH |
795 | |
796 | return 0; | |
797 | } | |
82fd53b7 MH |
798 | #endif |
799 | ||
cf108b5c JH |
800 | static SIMPLE_DEV_PM_OPS(adp8860_i2c_pm_ops, adp8860_i2c_suspend, |
801 | adp8860_i2c_resume); | |
802 | ||
82fd53b7 | 803 | static const struct i2c_device_id adp8860_id[] = { |
c7c06d8a MH |
804 | { "adp8860", adp8860 }, |
805 | { "adp8861", adp8861 }, | |
806 | { "adp8863", adp8863 }, | |
82fd53b7 MH |
807 | { } |
808 | }; | |
809 | MODULE_DEVICE_TABLE(i2c, adp8860_id); | |
810 | ||
811 | static struct i2c_driver adp8860_driver = { | |
812 | .driver = { | |
cf108b5c JH |
813 | .name = KBUILD_MODNAME, |
814 | .pm = &adp8860_i2c_pm_ops, | |
82fd53b7 MH |
815 | }, |
816 | .probe = adp8860_probe, | |
d1723fa2 | 817 | .remove = adp8860_remove, |
82fd53b7 MH |
818 | .id_table = adp8860_id, |
819 | }; | |
820 | ||
81ce6864 | 821 | module_i2c_driver(adp8860_driver); |
82fd53b7 MH |
822 | |
823 | MODULE_LICENSE("GPL v2"); | |
0b193400 | 824 | MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); |
82fd53b7 | 825 | MODULE_DESCRIPTION("ADP8860 Backlight driver"); |