Commit | Line | Data |
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82fd53b7 MH |
1 | /* |
2 | * Backlight driver for Analog Devices ADP8860 Backlight Devices | |
3 | * | |
4 | * Copyright 2009-2010 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
82fd53b7 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> | |
3f43f8b2 | 18 | #include <linux/slab.h> |
82fd53b7 MH |
19 | #include <linux/workqueue.h> |
20 | ||
21 | #include <linux/i2c/adp8860.h> | |
22 | #define ADP8860_EXT_FEATURES | |
23 | #define ADP8860_USE_LEDS | |
24 | ||
25 | #define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */ | |
26 | #define ADP8860_MDCR 0x01 /* Device mode and status */ | |
27 | #define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */ | |
28 | #define ADP8860_INTR_EN 0x03 /* Interrupts enable */ | |
29 | #define ADP8860_CFGR 0x04 /* Configuration register */ | |
30 | #define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */ | |
31 | #define ADP8860_BLOFF 0x06 /* Backlight off timeout */ | |
32 | #define ADP8860_BLDIM 0x07 /* Backlight dim timeout */ | |
33 | #define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */ | |
34 | #define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */ | |
35 | #define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */ | |
36 | #define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */ | |
37 | #define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */ | |
38 | #define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */ | |
39 | #define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */ | |
40 | #define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */ | |
41 | #define ADP8860_ISCC 0x10 /* Independent sink current control register */ | |
42 | #define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */ | |
43 | #define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */ | |
44 | #define ADP8860_ISCF 0x13 /* Independent sink current fade register */ | |
45 | #define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */ | |
46 | #define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */ | |
47 | #define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */ | |
48 | #define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */ | |
49 | #define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */ | |
50 | #define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */ | |
51 | #define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */ | |
52 | #define ADP8860_CCFG 0x1B /* Comparator configuration */ | |
53 | #define ADP8860_CCFG2 0x1C /* Second comparator configuration */ | |
54 | #define ADP8860_L2_TRP 0x1D /* L2 comparator reference */ | |
55 | #define ADP8860_L2_HYS 0x1E /* L2 hysteresis */ | |
56 | #define ADP8860_L3_TRP 0x1F /* L3 comparator reference */ | |
57 | #define ADP8860_L3_HYS 0x20 /* L3 hysteresis */ | |
58 | #define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */ | |
59 | #define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */ | |
60 | #define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */ | |
61 | #define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */ | |
62 | ||
63 | #define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */ | |
c7c06d8a MH |
64 | #define ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */ |
65 | #define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer ID */ | |
66 | ||
82fd53b7 MH |
67 | #define ADP8860_DEVID(x) ((x) & 0xF) |
68 | #define ADP8860_MANID(x) ((x) >> 4) | |
69 | ||
70 | /* MDCR Device mode and status */ | |
71 | #define INT_CFG (1 << 6) | |
72 | #define NSTBY (1 << 5) | |
73 | #define DIM_EN (1 << 4) | |
c7c06d8a | 74 | #define GDWN_DIS (1 << 3) |
82fd53b7 MH |
75 | #define SIS_EN (1 << 2) |
76 | #define CMP_AUTOEN (1 << 1) | |
77 | #define BLEN (1 << 0) | |
78 | ||
79 | /* ADP8860_CCFG Main ALS comparator level enable */ | |
80 | #define L3_EN (1 << 1) | |
81 | #define L2_EN (1 << 0) | |
82 | ||
83 | #define CFGR_BLV_SHIFT 3 | |
84 | #define CFGR_BLV_MASK 0x3 | |
85 | #define ADP8860_FLAG_LED_MASK 0xFF | |
86 | ||
87 | #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) | |
88 | #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) | |
89 | #define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5) | |
90 | ||
c7c06d8a MH |
91 | enum { |
92 | adp8860, | |
93 | adp8861, | |
94 | adp8863 | |
95 | }; | |
96 | ||
82fd53b7 MH |
97 | struct adp8860_led { |
98 | struct led_classdev cdev; | |
99 | struct work_struct work; | |
100 | struct i2c_client *client; | |
101 | enum led_brightness new_brightness; | |
102 | int id; | |
103 | int flags; | |
104 | }; | |
105 | ||
106 | struct adp8860_bl { | |
107 | struct i2c_client *client; | |
108 | struct backlight_device *bl; | |
109 | struct adp8860_led *led; | |
110 | struct adp8860_backlight_platform_data *pdata; | |
111 | struct mutex lock; | |
112 | unsigned long cached_daylight_max; | |
113 | int id; | |
114 | int revid; | |
115 | int current_brightness; | |
c7c06d8a MH |
116 | unsigned en_ambl_sens:1; |
117 | unsigned gdwn_dis:1; | |
82fd53b7 MH |
118 | }; |
119 | ||
120 | static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val) | |
121 | { | |
122 | int ret; | |
123 | ||
124 | ret = i2c_smbus_read_byte_data(client, reg); | |
125 | if (ret < 0) { | |
126 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | *val = (uint8_t)ret; | |
131 | return 0; | |
132 | } | |
133 | ||
82fd53b7 MH |
134 | static int adp8860_write(struct i2c_client *client, u8 reg, u8 val) |
135 | { | |
136 | return i2c_smbus_write_byte_data(client, reg, val); | |
137 | } | |
138 | ||
139 | static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
140 | { | |
141 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
142 | uint8_t reg_val; | |
143 | int ret; | |
144 | ||
145 | mutex_lock(&data->lock); | |
146 | ||
147 | ret = adp8860_read(client, reg, ®_val); | |
148 | ||
36c3e759 | 149 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
82fd53b7 MH |
150 | reg_val |= bit_mask; |
151 | ret = adp8860_write(client, reg, reg_val); | |
152 | } | |
153 | ||
154 | mutex_unlock(&data->lock); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
159 | { | |
160 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
161 | uint8_t reg_val; | |
162 | int ret; | |
163 | ||
164 | mutex_lock(&data->lock); | |
165 | ||
166 | ret = adp8860_read(client, reg, ®_val); | |
167 | ||
168 | if (!ret && (reg_val & bit_mask)) { | |
169 | reg_val &= ~bit_mask; | |
170 | ret = adp8860_write(client, reg, reg_val); | |
171 | } | |
172 | ||
173 | mutex_unlock(&data->lock); | |
174 | return ret; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Independent sink / LED | |
179 | */ | |
180 | #if defined(ADP8860_USE_LEDS) | |
181 | static void adp8860_led_work(struct work_struct *work) | |
182 | { | |
183 | struct adp8860_led *led = container_of(work, struct adp8860_led, work); | |
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 | ||
216 | static int __devinit adp8860_led_probe(struct i2c_client *client) | |
217 | { | |
218 | struct adp8860_backlight_platform_data *pdata = | |
219 | client->dev.platform_data; | |
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 | ||
58875ea9 JH |
225 | led = devm_kzalloc(&client->dev, sizeof(*led) * pdata->num_leds, |
226 | GFP_KERNEL); | |
82fd53b7 MH |
227 | if (led == NULL) { |
228 | dev_err(&client->dev, "failed to alloc memory\n"); | |
229 | return -ENOMEM; | |
230 | } | |
231 | ||
232 | ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law); | |
233 | ret = adp8860_write(client, ADP8860_ISCT1, | |
234 | (pdata->led_on_time & 0x3) << 6); | |
235 | ret |= adp8860_write(client, ADP8860_ISCF, | |
236 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); | |
237 | ||
238 | if (ret) { | |
239 | dev_err(&client->dev, "failed to write\n"); | |
58875ea9 | 240 | return ret; |
82fd53b7 MH |
241 | } |
242 | ||
243 | for (i = 0; i < pdata->num_leds; ++i) { | |
244 | cur_led = &pdata->leds[i]; | |
245 | led_dat = &led[i]; | |
246 | ||
247 | led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK; | |
248 | ||
249 | if (led_dat->id > 7 || led_dat->id < 1) { | |
250 | dev_err(&client->dev, "Invalid LED ID %d\n", | |
251 | led_dat->id); | |
252 | goto err; | |
253 | } | |
254 | ||
255 | if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { | |
256 | dev_err(&client->dev, "LED %d used by Backlight\n", | |
257 | led_dat->id); | |
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 | ||
298 | static int __devexit adp8860_led_remove(struct i2c_client *client) | |
299 | { | |
300 | struct adp8860_backlight_platform_data *pdata = | |
301 | client->dev.platform_data; | |
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 | |
313 | static int __devinit adp8860_led_probe(struct i2c_client *client) | |
314 | { | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static int __devexit adp8860_led_remove(struct i2c_client *client) | |
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; | |
365 | if (bl->props.power != FB_BLANK_UNBLANK) | |
366 | brightness = 0; | |
367 | ||
368 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
369 | brightness = 0; | |
370 | ||
371 | return adp8860_bl_set(bl, brightness); | |
372 | } | |
373 | ||
374 | static int adp8860_bl_get_brightness(struct backlight_device *bl) | |
375 | { | |
376 | struct adp8860_bl *data = bl_get_data(bl); | |
377 | ||
378 | return data->current_brightness; | |
379 | } | |
380 | ||
381 | static const struct backlight_ops adp8860_bl_ops = { | |
382 | .update_status = adp8860_bl_update_status, | |
383 | .get_brightness = adp8860_bl_get_brightness, | |
384 | }; | |
385 | ||
386 | static int adp8860_bl_setup(struct backlight_device *bl) | |
387 | { | |
388 | struct adp8860_bl *data = bl_get_data(bl); | |
389 | struct i2c_client *client = data->client; | |
390 | struct adp8860_backlight_platform_data *pdata = data->pdata; | |
391 | int ret = 0; | |
392 | ||
393 | ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign); | |
394 | ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max); | |
395 | ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim); | |
396 | ||
c7c06d8a | 397 | if (data->en_ambl_sens) { |
82fd53b7 MH |
398 | data->cached_daylight_max = pdata->l1_daylight_max; |
399 | ret |= adp8860_write(client, ADP8860_BLMX2, | |
400 | pdata->l2_office_max); | |
401 | ret |= adp8860_write(client, ADP8860_BLDM2, | |
402 | pdata->l2_office_dim); | |
403 | ret |= adp8860_write(client, ADP8860_BLMX3, | |
404 | pdata->l3_dark_max); | |
405 | ret |= adp8860_write(client, ADP8860_BLDM3, | |
406 | pdata->l3_dark_dim); | |
407 | ||
408 | ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip); | |
409 | ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst); | |
410 | ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip); | |
411 | ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst); | |
412 | ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN | | |
413 | ALS_CCFG_VAL(pdata->abml_filt)); | |
414 | } | |
415 | ||
416 | ret |= adp8860_write(client, ADP8860_CFGR, | |
417 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
418 | ||
419 | ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in, | |
420 | pdata->bl_fade_out)); | |
421 | ||
c7c06d8a MH |
422 | ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY | |
423 | (data->gdwn_dis ? GDWN_DIS : 0)); | |
82fd53b7 MH |
424 | |
425 | return ret; | |
426 | } | |
427 | ||
428 | static ssize_t adp8860_show(struct device *dev, char *buf, int reg) | |
429 | { | |
430 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
431 | int error; | |
432 | uint8_t reg_val; | |
433 | ||
434 | mutex_lock(&data->lock); | |
435 | error = adp8860_read(data->client, reg, ®_val); | |
436 | mutex_unlock(&data->lock); | |
437 | ||
438 | if (error < 0) | |
439 | return error; | |
440 | ||
441 | return sprintf(buf, "%u\n", reg_val); | |
442 | } | |
443 | ||
444 | static ssize_t adp8860_store(struct device *dev, const char *buf, | |
445 | size_t count, int reg) | |
446 | { | |
447 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
448 | unsigned long val; | |
449 | int ret; | |
450 | ||
8dd9d7f2 | 451 | ret = kstrtoul(buf, 10, &val); |
82fd53b7 MH |
452 | if (ret) |
453 | return ret; | |
454 | ||
455 | mutex_lock(&data->lock); | |
456 | adp8860_write(data->client, reg, val); | |
457 | mutex_unlock(&data->lock); | |
458 | ||
459 | return count; | |
460 | } | |
461 | ||
462 | static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev, | |
463 | struct device_attribute *attr, char *buf) | |
464 | { | |
465 | return adp8860_show(dev, buf, ADP8860_BLMX3); | |
466 | } | |
467 | ||
468 | static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev, | |
469 | struct device_attribute *attr, const char *buf, size_t count) | |
470 | { | |
471 | return adp8860_store(dev, buf, count, ADP8860_BLMX3); | |
472 | } | |
473 | ||
474 | static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show, | |
475 | adp8860_bl_l3_dark_max_store); | |
476 | ||
477 | static ssize_t adp8860_bl_l2_office_max_show(struct device *dev, | |
478 | struct device_attribute *attr, char *buf) | |
479 | { | |
480 | return adp8860_show(dev, buf, ADP8860_BLMX2); | |
481 | } | |
482 | ||
483 | static ssize_t adp8860_bl_l2_office_max_store(struct device *dev, | |
484 | struct device_attribute *attr, const char *buf, size_t count) | |
485 | { | |
486 | return adp8860_store(dev, buf, count, ADP8860_BLMX2); | |
487 | } | |
488 | static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show, | |
489 | adp8860_bl_l2_office_max_store); | |
490 | ||
491 | static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev, | |
492 | struct device_attribute *attr, char *buf) | |
493 | { | |
494 | return adp8860_show(dev, buf, ADP8860_BLMX1); | |
495 | } | |
496 | ||
497 | static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, | |
498 | struct device_attribute *attr, const char *buf, size_t count) | |
499 | { | |
500 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
8dd9d7f2 | 501 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
4f1aa846 MH |
502 | if (ret) |
503 | return ret; | |
82fd53b7 | 504 | |
82fd53b7 MH |
505 | return adp8860_store(dev, buf, count, ADP8860_BLMX1); |
506 | } | |
507 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, | |
508 | adp8860_bl_l1_daylight_max_store); | |
509 | ||
510 | static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev, | |
511 | struct device_attribute *attr, char *buf) | |
512 | { | |
513 | return adp8860_show(dev, buf, ADP8860_BLDM3); | |
514 | } | |
515 | ||
516 | static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev, | |
517 | struct device_attribute *attr, | |
518 | const char *buf, size_t count) | |
519 | { | |
520 | return adp8860_store(dev, buf, count, ADP8860_BLDM3); | |
521 | } | |
522 | static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show, | |
523 | adp8860_bl_l3_dark_dim_store); | |
524 | ||
525 | static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev, | |
526 | struct device_attribute *attr, char *buf) | |
527 | { | |
528 | return adp8860_show(dev, buf, ADP8860_BLDM2); | |
529 | } | |
530 | ||
531 | static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev, | |
532 | struct device_attribute *attr, | |
533 | const char *buf, size_t count) | |
534 | { | |
535 | return adp8860_store(dev, buf, count, ADP8860_BLDM2); | |
536 | } | |
537 | static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show, | |
538 | adp8860_bl_l2_office_dim_store); | |
539 | ||
540 | static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev, | |
541 | struct device_attribute *attr, char *buf) | |
542 | { | |
543 | return adp8860_show(dev, buf, ADP8860_BLDM1); | |
544 | } | |
545 | ||
546 | static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev, | |
547 | struct device_attribute *attr, | |
548 | const char *buf, size_t count) | |
549 | { | |
550 | return adp8860_store(dev, buf, count, ADP8860_BLDM1); | |
551 | } | |
552 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show, | |
553 | adp8860_bl_l1_daylight_dim_store); | |
554 | ||
555 | #ifdef ADP8860_EXT_FEATURES | |
556 | static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev, | |
557 | struct device_attribute *attr, char *buf) | |
558 | { | |
559 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
560 | int error; | |
561 | uint8_t reg_val; | |
562 | uint16_t ret_val; | |
563 | ||
564 | mutex_lock(&data->lock); | |
565 | error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val); | |
566 | ret_val = reg_val; | |
567 | error |= adp8860_read(data->client, ADP8860_PH1LEVH, ®_val); | |
568 | mutex_unlock(&data->lock); | |
569 | ||
570 | if (error < 0) | |
571 | return error; | |
572 | ||
573 | /* Return 13-bit conversion value for the first light sensor */ | |
574 | ret_val += (reg_val & 0x1F) << 8; | |
575 | ||
576 | return sprintf(buf, "%u\n", ret_val); | |
577 | } | |
578 | static DEVICE_ATTR(ambient_light_level, 0444, | |
579 | adp8860_bl_ambient_light_level_show, NULL); | |
580 | ||
581 | static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev, | |
582 | struct device_attribute *attr, char *buf) | |
583 | { | |
584 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
585 | int error; | |
586 | uint8_t reg_val; | |
587 | ||
588 | mutex_lock(&data->lock); | |
589 | error = adp8860_read(data->client, ADP8860_CFGR, ®_val); | |
590 | mutex_unlock(&data->lock); | |
591 | ||
592 | if (error < 0) | |
593 | return error; | |
594 | ||
595 | return sprintf(buf, "%u\n", | |
596 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); | |
597 | } | |
598 | ||
599 | static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, | |
600 | struct device_attribute *attr, | |
601 | const char *buf, size_t count) | |
602 | { | |
603 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
604 | unsigned long val; | |
605 | uint8_t reg_val; | |
606 | int ret; | |
607 | ||
8dd9d7f2 | 608 | ret = kstrtoul(buf, 10, &val); |
82fd53b7 MH |
609 | if (ret) |
610 | return ret; | |
611 | ||
612 | if (val == 0) { | |
613 | /* Enable automatic ambient light sensing */ | |
614 | adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); | |
c7ce2500 | 615 | } else if ((val > 0) && (val <= 3)) { |
82fd53b7 MH |
616 | /* Disable automatic ambient light sensing */ |
617 | adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); | |
618 | ||
619 | /* Set user supplied ambient light zone */ | |
620 | mutex_lock(&data->lock); | |
621 | adp8860_read(data->client, ADP8860_CFGR, ®_val); | |
622 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); | |
c7ce2500 | 623 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; |
82fd53b7 MH |
624 | adp8860_write(data->client, ADP8860_CFGR, reg_val); |
625 | mutex_unlock(&data->lock); | |
626 | } | |
627 | ||
628 | return count; | |
629 | } | |
630 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
631 | adp8860_bl_ambient_light_zone_show, | |
632 | adp8860_bl_ambient_light_zone_store); | |
633 | #endif | |
634 | ||
635 | static struct attribute *adp8860_bl_attributes[] = { | |
636 | &dev_attr_l3_dark_max.attr, | |
637 | &dev_attr_l3_dark_dim.attr, | |
638 | &dev_attr_l2_office_max.attr, | |
639 | &dev_attr_l2_office_dim.attr, | |
640 | &dev_attr_l1_daylight_max.attr, | |
641 | &dev_attr_l1_daylight_dim.attr, | |
642 | #ifdef ADP8860_EXT_FEATURES | |
643 | &dev_attr_ambient_light_level.attr, | |
644 | &dev_attr_ambient_light_zone.attr, | |
645 | #endif | |
646 | NULL | |
647 | }; | |
648 | ||
649 | static const struct attribute_group adp8860_bl_attr_group = { | |
650 | .attrs = adp8860_bl_attributes, | |
651 | }; | |
652 | ||
653 | static int __devinit adp8860_probe(struct i2c_client *client, | |
654 | const struct i2c_device_id *id) | |
655 | { | |
656 | struct backlight_device *bl; | |
657 | struct adp8860_bl *data; | |
658 | struct adp8860_backlight_platform_data *pdata = | |
659 | client->dev.platform_data; | |
3f43f8b2 | 660 | struct backlight_properties props; |
82fd53b7 MH |
661 | uint8_t reg_val; |
662 | int ret; | |
663 | ||
664 | if (!i2c_check_functionality(client->adapter, | |
665 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
666 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
667 | return -EIO; | |
668 | } | |
669 | ||
670 | if (!pdata) { | |
671 | dev_err(&client->dev, "no platform data?\n"); | |
672 | return -EINVAL; | |
673 | } | |
674 | ||
58875ea9 | 675 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
c7c06d8a MH |
676 | if (data == NULL) |
677 | return -ENOMEM; | |
678 | ||
82fd53b7 MH |
679 | ret = adp8860_read(client, ADP8860_MFDVID, ®_val); |
680 | if (ret < 0) | |
58875ea9 | 681 | return ret; |
82fd53b7 | 682 | |
c7c06d8a MH |
683 | switch (ADP8860_MANID(reg_val)) { |
684 | case ADP8863_MANUFID: | |
685 | data->gdwn_dis = !!pdata->gdwn_dis; | |
686 | case ADP8860_MANUFID: | |
687 | data->en_ambl_sens = !!pdata->en_ambl_sens; | |
688 | break; | |
689 | case ADP8861_MANUFID: | |
690 | data->gdwn_dis = !!pdata->gdwn_dis; | |
691 | break; | |
692 | default: | |
82fd53b7 | 693 | dev_err(&client->dev, "failed to probe\n"); |
58875ea9 | 694 | return -ENODEV; |
82fd53b7 MH |
695 | } |
696 | ||
82fd53b7 MH |
697 | /* It's confirmed that the DEVID field is actually a REVID */ |
698 | ||
699 | data->revid = ADP8860_DEVID(reg_val); | |
700 | data->client = client; | |
701 | data->pdata = pdata; | |
702 | data->id = id->driver_data; | |
703 | data->current_brightness = 0; | |
704 | i2c_set_clientdata(client, data); | |
705 | ||
3f43f8b2 | 706 | memset(&props, 0, sizeof(props)); |
bb7ca747 | 707 | props.type = BACKLIGHT_RAW; |
3f43f8b2 RD |
708 | props.max_brightness = ADP8860_MAX_BRIGHTNESS; |
709 | ||
82fd53b7 MH |
710 | mutex_init(&data->lock); |
711 | ||
712 | bl = backlight_device_register(dev_driver_string(&client->dev), | |
3f43f8b2 | 713 | &client->dev, data, &adp8860_bl_ops, &props); |
82fd53b7 MH |
714 | if (IS_ERR(bl)) { |
715 | dev_err(&client->dev, "failed to register backlight\n"); | |
58875ea9 | 716 | return PTR_ERR(bl); |
82fd53b7 MH |
717 | } |
718 | ||
6b19bad8 | 719 | bl->props.brightness = ADP8860_MAX_BRIGHTNESS; |
82fd53b7 MH |
720 | |
721 | data->bl = bl; | |
722 | ||
c7c06d8a | 723 | if (data->en_ambl_sens) |
82fd53b7 MH |
724 | ret = sysfs_create_group(&bl->dev.kobj, |
725 | &adp8860_bl_attr_group); | |
726 | ||
727 | if (ret) { | |
728 | dev_err(&client->dev, "failed to register sysfs\n"); | |
729 | goto out1; | |
730 | } | |
731 | ||
732 | ret = adp8860_bl_setup(bl); | |
733 | if (ret) { | |
734 | ret = -EIO; | |
735 | goto out; | |
736 | } | |
737 | ||
738 | backlight_update_status(bl); | |
739 | ||
c7c06d8a MH |
740 | dev_info(&client->dev, "%s Rev.%d Backlight\n", |
741 | client->name, data->revid); | |
82fd53b7 MH |
742 | |
743 | if (pdata->num_leds) | |
744 | adp8860_led_probe(client); | |
745 | ||
746 | return 0; | |
747 | ||
748 | out: | |
c7c06d8a | 749 | if (data->en_ambl_sens) |
82fd53b7 MH |
750 | sysfs_remove_group(&data->bl->dev.kobj, |
751 | &adp8860_bl_attr_group); | |
752 | out1: | |
753 | backlight_device_unregister(bl); | |
82fd53b7 MH |
754 | |
755 | return ret; | |
756 | } | |
757 | ||
758 | static int __devexit adp8860_remove(struct i2c_client *client) | |
759 | { | |
760 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
761 | ||
762 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); | |
763 | ||
764 | if (data->led) | |
765 | adp8860_led_remove(client); | |
766 | ||
c7c06d8a | 767 | if (data->en_ambl_sens) |
82fd53b7 MH |
768 | sysfs_remove_group(&data->bl->dev.kobj, |
769 | &adp8860_bl_attr_group); | |
770 | ||
771 | backlight_device_unregister(data->bl); | |
82fd53b7 MH |
772 | |
773 | return 0; | |
774 | } | |
775 | ||
776 | #ifdef CONFIG_PM | |
777 | static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message) | |
778 | { | |
779 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int adp8860_i2c_resume(struct i2c_client *client) | |
785 | { | |
786 | adp8860_set_bits(client, ADP8860_MDCR, NSTBY); | |
787 | ||
788 | return 0; | |
789 | } | |
790 | #else | |
791 | #define adp8860_i2c_suspend NULL | |
792 | #define adp8860_i2c_resume NULL | |
793 | #endif | |
794 | ||
795 | static const struct i2c_device_id adp8860_id[] = { | |
c7c06d8a MH |
796 | { "adp8860", adp8860 }, |
797 | { "adp8861", adp8861 }, | |
798 | { "adp8863", adp8863 }, | |
82fd53b7 MH |
799 | { } |
800 | }; | |
801 | MODULE_DEVICE_TABLE(i2c, adp8860_id); | |
802 | ||
803 | static struct i2c_driver adp8860_driver = { | |
804 | .driver = { | |
805 | .name = KBUILD_MODNAME, | |
806 | }, | |
807 | .probe = adp8860_probe, | |
808 | .remove = __devexit_p(adp8860_remove), | |
809 | .suspend = adp8860_i2c_suspend, | |
810 | .resume = adp8860_i2c_resume, | |
811 | .id_table = adp8860_id, | |
812 | }; | |
813 | ||
81ce6864 | 814 | module_i2c_driver(adp8860_driver); |
82fd53b7 MH |
815 | |
816 | MODULE_LICENSE("GPL v2"); | |
817 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
818 | MODULE_DESCRIPTION("ADP8860 Backlight driver"); | |
819 | MODULE_ALIAS("i2c:adp8860-backlight"); |