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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> | |
10 | #include <linux/version.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/pm.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/fb.h> | |
17 | #include <linux/backlight.h> | |
18 | #include <linux/leds.h> | |
3f43f8b2 | 19 | #include <linux/slab.h> |
82fd53b7 MH |
20 | #include <linux/workqueue.h> |
21 | ||
22 | #include <linux/i2c/adp8860.h> | |
23 | #define ADP8860_EXT_FEATURES | |
24 | #define ADP8860_USE_LEDS | |
25 | ||
26 | #define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */ | |
27 | #define ADP8860_MDCR 0x01 /* Device mode and status */ | |
28 | #define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */ | |
29 | #define ADP8860_INTR_EN 0x03 /* Interrupts enable */ | |
30 | #define ADP8860_CFGR 0x04 /* Configuration register */ | |
31 | #define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */ | |
32 | #define ADP8860_BLOFF 0x06 /* Backlight off timeout */ | |
33 | #define ADP8860_BLDIM 0x07 /* Backlight dim timeout */ | |
34 | #define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */ | |
35 | #define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */ | |
36 | #define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */ | |
37 | #define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */ | |
38 | #define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */ | |
39 | #define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */ | |
40 | #define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */ | |
41 | #define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */ | |
42 | #define ADP8860_ISCC 0x10 /* Independent sink current control register */ | |
43 | #define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */ | |
44 | #define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */ | |
45 | #define ADP8860_ISCF 0x13 /* Independent sink current fade register */ | |
46 | #define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */ | |
47 | #define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */ | |
48 | #define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */ | |
49 | #define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */ | |
50 | #define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */ | |
51 | #define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */ | |
52 | #define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */ | |
53 | #define ADP8860_CCFG 0x1B /* Comparator configuration */ | |
54 | #define ADP8860_CCFG2 0x1C /* Second comparator configuration */ | |
55 | #define ADP8860_L2_TRP 0x1D /* L2 comparator reference */ | |
56 | #define ADP8860_L2_HYS 0x1E /* L2 hysteresis */ | |
57 | #define ADP8860_L3_TRP 0x1F /* L3 comparator reference */ | |
58 | #define ADP8860_L3_HYS 0x20 /* L3 hysteresis */ | |
59 | #define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */ | |
60 | #define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */ | |
61 | #define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */ | |
62 | #define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */ | |
63 | ||
64 | #define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */ | |
c7c06d8a MH |
65 | #define ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */ |
66 | #define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer ID */ | |
67 | ||
82fd53b7 MH |
68 | #define ADP8860_DEVID(x) ((x) & 0xF) |
69 | #define ADP8860_MANID(x) ((x) >> 4) | |
70 | ||
71 | /* MDCR Device mode and status */ | |
72 | #define INT_CFG (1 << 6) | |
73 | #define NSTBY (1 << 5) | |
74 | #define DIM_EN (1 << 4) | |
c7c06d8a | 75 | #define GDWN_DIS (1 << 3) |
82fd53b7 MH |
76 | #define SIS_EN (1 << 2) |
77 | #define CMP_AUTOEN (1 << 1) | |
78 | #define BLEN (1 << 0) | |
79 | ||
80 | /* ADP8860_CCFG Main ALS comparator level enable */ | |
81 | #define L3_EN (1 << 1) | |
82 | #define L2_EN (1 << 0) | |
83 | ||
84 | #define CFGR_BLV_SHIFT 3 | |
85 | #define CFGR_BLV_MASK 0x3 | |
86 | #define ADP8860_FLAG_LED_MASK 0xFF | |
87 | ||
88 | #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) | |
89 | #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) | |
90 | #define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5) | |
91 | ||
c7c06d8a MH |
92 | enum { |
93 | adp8860, | |
94 | adp8861, | |
95 | adp8863 | |
96 | }; | |
97 | ||
82fd53b7 MH |
98 | struct adp8860_led { |
99 | struct led_classdev cdev; | |
100 | struct work_struct work; | |
101 | struct i2c_client *client; | |
102 | enum led_brightness new_brightness; | |
103 | int id; | |
104 | int flags; | |
105 | }; | |
106 | ||
107 | struct adp8860_bl { | |
108 | struct i2c_client *client; | |
109 | struct backlight_device *bl; | |
110 | struct adp8860_led *led; | |
111 | struct adp8860_backlight_platform_data *pdata; | |
112 | struct mutex lock; | |
113 | unsigned long cached_daylight_max; | |
114 | int id; | |
115 | int revid; | |
116 | int current_brightness; | |
c7c06d8a MH |
117 | unsigned en_ambl_sens:1; |
118 | unsigned gdwn_dis:1; | |
82fd53b7 MH |
119 | }; |
120 | ||
121 | static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val) | |
122 | { | |
123 | int ret; | |
124 | ||
125 | ret = i2c_smbus_read_byte_data(client, reg); | |
126 | if (ret < 0) { | |
127 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
128 | return ret; | |
129 | } | |
130 | ||
131 | *val = (uint8_t)ret; | |
132 | return 0; | |
133 | } | |
134 | ||
82fd53b7 MH |
135 | static int adp8860_write(struct i2c_client *client, u8 reg, u8 val) |
136 | { | |
137 | return i2c_smbus_write_byte_data(client, reg, val); | |
138 | } | |
139 | ||
140 | static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
141 | { | |
142 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
143 | uint8_t reg_val; | |
144 | int ret; | |
145 | ||
146 | mutex_lock(&data->lock); | |
147 | ||
148 | ret = adp8860_read(client, reg, ®_val); | |
149 | ||
150 | if (!ret && ((reg_val & bit_mask) == 0)) { | |
151 | reg_val |= bit_mask; | |
152 | ret = adp8860_write(client, reg, reg_val); | |
153 | } | |
154 | ||
155 | mutex_unlock(&data->lock); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
160 | { | |
161 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
162 | uint8_t reg_val; | |
163 | int ret; | |
164 | ||
165 | mutex_lock(&data->lock); | |
166 | ||
167 | ret = adp8860_read(client, reg, ®_val); | |
168 | ||
169 | if (!ret && (reg_val & bit_mask)) { | |
170 | reg_val &= ~bit_mask; | |
171 | ret = adp8860_write(client, reg, reg_val); | |
172 | } | |
173 | ||
174 | mutex_unlock(&data->lock); | |
175 | return ret; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Independent sink / LED | |
180 | */ | |
181 | #if defined(ADP8860_USE_LEDS) | |
182 | static void adp8860_led_work(struct work_struct *work) | |
183 | { | |
184 | struct adp8860_led *led = container_of(work, struct adp8860_led, work); | |
185 | adp8860_write(led->client, ADP8860_ISC1 - led->id + 1, | |
186 | led->new_brightness >> 1); | |
187 | } | |
188 | ||
189 | static void adp8860_led_set(struct led_classdev *led_cdev, | |
190 | enum led_brightness value) | |
191 | { | |
192 | struct adp8860_led *led; | |
193 | ||
194 | led = container_of(led_cdev, struct adp8860_led, cdev); | |
195 | led->new_brightness = value; | |
196 | schedule_work(&led->work); | |
197 | } | |
198 | ||
199 | static int adp8860_led_setup(struct adp8860_led *led) | |
200 | { | |
201 | struct i2c_client *client = led->client; | |
202 | int ret = 0; | |
203 | ||
204 | ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0); | |
205 | ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1)); | |
206 | ||
207 | if (led->id > 4) | |
208 | ret |= adp8860_set_bits(client, ADP8860_ISCT1, | |
209 | (led->flags & 0x3) << ((led->id - 5) * 2)); | |
210 | else | |
211 | ret |= adp8860_set_bits(client, ADP8860_ISCT2, | |
212 | (led->flags & 0x3) << ((led->id - 1) * 2)); | |
213 | ||
214 | return ret; | |
215 | } | |
216 | ||
217 | static int __devinit adp8860_led_probe(struct i2c_client *client) | |
218 | { | |
219 | struct adp8860_backlight_platform_data *pdata = | |
220 | client->dev.platform_data; | |
221 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
222 | struct adp8860_led *led, *led_dat; | |
223 | struct led_info *cur_led; | |
224 | int ret, i; | |
225 | ||
226 | led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL); | |
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"); | |
240 | goto err_free; | |
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 | ||
295 | err_free: | |
296 | kfree(led); | |
297 | ||
298 | return ret; | |
299 | } | |
300 | ||
301 | static int __devexit adp8860_led_remove(struct i2c_client *client) | |
302 | { | |
303 | struct adp8860_backlight_platform_data *pdata = | |
304 | client->dev.platform_data; | |
305 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
306 | int i; | |
307 | ||
308 | for (i = 0; i < pdata->num_leds; i++) { | |
309 | led_classdev_unregister(&data->led[i].cdev); | |
310 | cancel_work_sync(&data->led[i].work); | |
311 | } | |
312 | ||
313 | kfree(data->led); | |
314 | return 0; | |
315 | } | |
316 | #else | |
317 | static int __devinit adp8860_led_probe(struct i2c_client *client) | |
318 | { | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int __devexit adp8860_led_remove(struct i2c_client *client) | |
323 | { | |
324 | return 0; | |
325 | } | |
326 | #endif | |
327 | ||
328 | static int adp8860_bl_set(struct backlight_device *bl, int brightness) | |
329 | { | |
330 | struct adp8860_bl *data = bl_get_data(bl); | |
331 | struct i2c_client *client = data->client; | |
332 | int ret = 0; | |
333 | ||
c7c06d8a | 334 | if (data->en_ambl_sens) { |
82fd53b7 MH |
335 | if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) { |
336 | /* Disable Ambient Light auto adjust */ | |
337 | ret |= adp8860_clr_bits(client, ADP8860_MDCR, | |
338 | CMP_AUTOEN); | |
339 | ret |= adp8860_write(client, ADP8860_BLMX1, brightness); | |
340 | } else { | |
341 | /* | |
342 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust | |
343 | * restore daylight l1 sysfs brightness | |
344 | */ | |
345 | ret |= adp8860_write(client, ADP8860_BLMX1, | |
346 | data->cached_daylight_max); | |
347 | ret |= adp8860_set_bits(client, ADP8860_MDCR, | |
348 | CMP_AUTOEN); | |
349 | } | |
350 | } else | |
351 | ret |= adp8860_write(client, ADP8860_BLMX1, brightness); | |
352 | ||
353 | if (data->current_brightness && brightness == 0) | |
354 | ret |= adp8860_set_bits(client, | |
355 | ADP8860_MDCR, DIM_EN); | |
356 | else if (data->current_brightness == 0 && brightness) | |
357 | ret |= adp8860_clr_bits(client, | |
358 | ADP8860_MDCR, DIM_EN); | |
359 | ||
360 | if (!ret) | |
361 | data->current_brightness = brightness; | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | static int adp8860_bl_update_status(struct backlight_device *bl) | |
367 | { | |
368 | int brightness = bl->props.brightness; | |
369 | if (bl->props.power != FB_BLANK_UNBLANK) | |
370 | brightness = 0; | |
371 | ||
372 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
373 | brightness = 0; | |
374 | ||
375 | return adp8860_bl_set(bl, brightness); | |
376 | } | |
377 | ||
378 | static int adp8860_bl_get_brightness(struct backlight_device *bl) | |
379 | { | |
380 | struct adp8860_bl *data = bl_get_data(bl); | |
381 | ||
382 | return data->current_brightness; | |
383 | } | |
384 | ||
385 | static const struct backlight_ops adp8860_bl_ops = { | |
386 | .update_status = adp8860_bl_update_status, | |
387 | .get_brightness = adp8860_bl_get_brightness, | |
388 | }; | |
389 | ||
390 | static int adp8860_bl_setup(struct backlight_device *bl) | |
391 | { | |
392 | struct adp8860_bl *data = bl_get_data(bl); | |
393 | struct i2c_client *client = data->client; | |
394 | struct adp8860_backlight_platform_data *pdata = data->pdata; | |
395 | int ret = 0; | |
396 | ||
397 | ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign); | |
398 | ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max); | |
399 | ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim); | |
400 | ||
c7c06d8a | 401 | if (data->en_ambl_sens) { |
82fd53b7 MH |
402 | data->cached_daylight_max = pdata->l1_daylight_max; |
403 | ret |= adp8860_write(client, ADP8860_BLMX2, | |
404 | pdata->l2_office_max); | |
405 | ret |= adp8860_write(client, ADP8860_BLDM2, | |
406 | pdata->l2_office_dim); | |
407 | ret |= adp8860_write(client, ADP8860_BLMX3, | |
408 | pdata->l3_dark_max); | |
409 | ret |= adp8860_write(client, ADP8860_BLDM3, | |
410 | pdata->l3_dark_dim); | |
411 | ||
412 | ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip); | |
413 | ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst); | |
414 | ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip); | |
415 | ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst); | |
416 | ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN | | |
417 | ALS_CCFG_VAL(pdata->abml_filt)); | |
418 | } | |
419 | ||
420 | ret |= adp8860_write(client, ADP8860_CFGR, | |
421 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
422 | ||
423 | ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in, | |
424 | pdata->bl_fade_out)); | |
425 | ||
c7c06d8a MH |
426 | ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY | |
427 | (data->gdwn_dis ? GDWN_DIS : 0)); | |
82fd53b7 MH |
428 | |
429 | return ret; | |
430 | } | |
431 | ||
432 | static ssize_t adp8860_show(struct device *dev, char *buf, int reg) | |
433 | { | |
434 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
435 | int error; | |
436 | uint8_t reg_val; | |
437 | ||
438 | mutex_lock(&data->lock); | |
439 | error = adp8860_read(data->client, reg, ®_val); | |
440 | mutex_unlock(&data->lock); | |
441 | ||
442 | if (error < 0) | |
443 | return error; | |
444 | ||
445 | return sprintf(buf, "%u\n", reg_val); | |
446 | } | |
447 | ||
448 | static ssize_t adp8860_store(struct device *dev, const char *buf, | |
449 | size_t count, int reg) | |
450 | { | |
451 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
452 | unsigned long val; | |
453 | int ret; | |
454 | ||
455 | ret = strict_strtoul(buf, 10, &val); | |
456 | if (ret) | |
457 | return ret; | |
458 | ||
459 | mutex_lock(&data->lock); | |
460 | adp8860_write(data->client, reg, val); | |
461 | mutex_unlock(&data->lock); | |
462 | ||
463 | return count; | |
464 | } | |
465 | ||
466 | static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev, | |
467 | struct device_attribute *attr, char *buf) | |
468 | { | |
469 | return adp8860_show(dev, buf, ADP8860_BLMX3); | |
470 | } | |
471 | ||
472 | static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev, | |
473 | struct device_attribute *attr, const char *buf, size_t count) | |
474 | { | |
475 | return adp8860_store(dev, buf, count, ADP8860_BLMX3); | |
476 | } | |
477 | ||
478 | static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show, | |
479 | adp8860_bl_l3_dark_max_store); | |
480 | ||
481 | static ssize_t adp8860_bl_l2_office_max_show(struct device *dev, | |
482 | struct device_attribute *attr, char *buf) | |
483 | { | |
484 | return adp8860_show(dev, buf, ADP8860_BLMX2); | |
485 | } | |
486 | ||
487 | static ssize_t adp8860_bl_l2_office_max_store(struct device *dev, | |
488 | struct device_attribute *attr, const char *buf, size_t count) | |
489 | { | |
490 | return adp8860_store(dev, buf, count, ADP8860_BLMX2); | |
491 | } | |
492 | static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show, | |
493 | adp8860_bl_l2_office_max_store); | |
494 | ||
495 | static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev, | |
496 | struct device_attribute *attr, char *buf) | |
497 | { | |
498 | return adp8860_show(dev, buf, ADP8860_BLMX1); | |
499 | } | |
500 | ||
501 | static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, | |
502 | struct device_attribute *attr, const char *buf, size_t count) | |
503 | { | |
504 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
4f1aa846 MH |
505 | int ret = strict_strtoul(buf, 10, &data->cached_daylight_max); |
506 | if (ret) | |
507 | return ret; | |
82fd53b7 | 508 | |
82fd53b7 MH |
509 | return adp8860_store(dev, buf, count, ADP8860_BLMX1); |
510 | } | |
511 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, | |
512 | adp8860_bl_l1_daylight_max_store); | |
513 | ||
514 | static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev, | |
515 | struct device_attribute *attr, char *buf) | |
516 | { | |
517 | return adp8860_show(dev, buf, ADP8860_BLDM3); | |
518 | } | |
519 | ||
520 | static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev, | |
521 | struct device_attribute *attr, | |
522 | const char *buf, size_t count) | |
523 | { | |
524 | return adp8860_store(dev, buf, count, ADP8860_BLDM3); | |
525 | } | |
526 | static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show, | |
527 | adp8860_bl_l3_dark_dim_store); | |
528 | ||
529 | static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev, | |
530 | struct device_attribute *attr, char *buf) | |
531 | { | |
532 | return adp8860_show(dev, buf, ADP8860_BLDM2); | |
533 | } | |
534 | ||
535 | static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev, | |
536 | struct device_attribute *attr, | |
537 | const char *buf, size_t count) | |
538 | { | |
539 | return adp8860_store(dev, buf, count, ADP8860_BLDM2); | |
540 | } | |
541 | static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show, | |
542 | adp8860_bl_l2_office_dim_store); | |
543 | ||
544 | static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev, | |
545 | struct device_attribute *attr, char *buf) | |
546 | { | |
547 | return adp8860_show(dev, buf, ADP8860_BLDM1); | |
548 | } | |
549 | ||
550 | static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev, | |
551 | struct device_attribute *attr, | |
552 | const char *buf, size_t count) | |
553 | { | |
554 | return adp8860_store(dev, buf, count, ADP8860_BLDM1); | |
555 | } | |
556 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show, | |
557 | adp8860_bl_l1_daylight_dim_store); | |
558 | ||
559 | #ifdef ADP8860_EXT_FEATURES | |
560 | static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev, | |
561 | struct device_attribute *attr, char *buf) | |
562 | { | |
563 | struct adp8860_bl *data = dev_get_drvdata(dev); | |
564 | int error; | |
565 | uint8_t reg_val; | |
566 | uint16_t ret_val; | |
567 | ||
568 | mutex_lock(&data->lock); | |
569 | error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val); | |
570 | ret_val = reg_val; | |
571 | error |= adp8860_read(data->client, ADP8860_PH1LEVH, ®_val); | |
572 | mutex_unlock(&data->lock); | |
573 | ||
574 | if (error < 0) | |
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 | ||
612 | ret = strict_strtoul(buf, 10, &val); | |
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); | |
625 | adp8860_read(data->client, ADP8860_CFGR, ®_val); | |
626 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); | |
c7ce2500 | 627 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; |
82fd53b7 MH |
628 | adp8860_write(data->client, ADP8860_CFGR, reg_val); |
629 | mutex_unlock(&data->lock); | |
630 | } | |
631 | ||
632 | return count; | |
633 | } | |
634 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
635 | adp8860_bl_ambient_light_zone_show, | |
636 | adp8860_bl_ambient_light_zone_store); | |
637 | #endif | |
638 | ||
639 | static struct attribute *adp8860_bl_attributes[] = { | |
640 | &dev_attr_l3_dark_max.attr, | |
641 | &dev_attr_l3_dark_dim.attr, | |
642 | &dev_attr_l2_office_max.attr, | |
643 | &dev_attr_l2_office_dim.attr, | |
644 | &dev_attr_l1_daylight_max.attr, | |
645 | &dev_attr_l1_daylight_dim.attr, | |
646 | #ifdef ADP8860_EXT_FEATURES | |
647 | &dev_attr_ambient_light_level.attr, | |
648 | &dev_attr_ambient_light_zone.attr, | |
649 | #endif | |
650 | NULL | |
651 | }; | |
652 | ||
653 | static const struct attribute_group adp8860_bl_attr_group = { | |
654 | .attrs = adp8860_bl_attributes, | |
655 | }; | |
656 | ||
657 | static int __devinit adp8860_probe(struct i2c_client *client, | |
658 | const struct i2c_device_id *id) | |
659 | { | |
660 | struct backlight_device *bl; | |
661 | struct adp8860_bl *data; | |
662 | struct adp8860_backlight_platform_data *pdata = | |
663 | client->dev.platform_data; | |
3f43f8b2 | 664 | struct backlight_properties props; |
82fd53b7 MH |
665 | uint8_t reg_val; |
666 | int ret; | |
667 | ||
668 | if (!i2c_check_functionality(client->adapter, | |
669 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
670 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
671 | return -EIO; | |
672 | } | |
673 | ||
674 | if (!pdata) { | |
675 | dev_err(&client->dev, "no platform data?\n"); | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
c7c06d8a MH |
679 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
680 | if (data == NULL) | |
681 | return -ENOMEM; | |
682 | ||
82fd53b7 MH |
683 | ret = adp8860_read(client, ADP8860_MFDVID, ®_val); |
684 | if (ret < 0) | |
c7c06d8a | 685 | goto out2; |
82fd53b7 | 686 | |
c7c06d8a MH |
687 | switch (ADP8860_MANID(reg_val)) { |
688 | case ADP8863_MANUFID: | |
689 | data->gdwn_dis = !!pdata->gdwn_dis; | |
690 | case ADP8860_MANUFID: | |
691 | data->en_ambl_sens = !!pdata->en_ambl_sens; | |
692 | break; | |
693 | case ADP8861_MANUFID: | |
694 | data->gdwn_dis = !!pdata->gdwn_dis; | |
695 | break; | |
696 | default: | |
82fd53b7 | 697 | dev_err(&client->dev, "failed to probe\n"); |
c7c06d8a MH |
698 | ret = -ENODEV; |
699 | goto out2; | |
82fd53b7 MH |
700 | } |
701 | ||
82fd53b7 MH |
702 | /* It's confirmed that the DEVID field is actually a REVID */ |
703 | ||
704 | data->revid = ADP8860_DEVID(reg_val); | |
705 | data->client = client; | |
706 | data->pdata = pdata; | |
707 | data->id = id->driver_data; | |
708 | data->current_brightness = 0; | |
709 | i2c_set_clientdata(client, data); | |
710 | ||
3f43f8b2 RD |
711 | memset(&props, 0, sizeof(props)); |
712 | props.max_brightness = ADP8860_MAX_BRIGHTNESS; | |
713 | ||
82fd53b7 MH |
714 | mutex_init(&data->lock); |
715 | ||
716 | bl = backlight_device_register(dev_driver_string(&client->dev), | |
3f43f8b2 | 717 | &client->dev, data, &adp8860_bl_ops, &props); |
82fd53b7 MH |
718 | if (IS_ERR(bl)) { |
719 | dev_err(&client->dev, "failed to register backlight\n"); | |
720 | ret = PTR_ERR(bl); | |
721 | goto out2; | |
722 | } | |
723 | ||
724 | bl->props.max_brightness = | |
725 | bl->props.brightness = ADP8860_MAX_BRIGHTNESS; | |
726 | ||
727 | data->bl = bl; | |
728 | ||
c7c06d8a | 729 | if (data->en_ambl_sens) |
82fd53b7 MH |
730 | ret = sysfs_create_group(&bl->dev.kobj, |
731 | &adp8860_bl_attr_group); | |
732 | ||
733 | if (ret) { | |
734 | dev_err(&client->dev, "failed to register sysfs\n"); | |
735 | goto out1; | |
736 | } | |
737 | ||
738 | ret = adp8860_bl_setup(bl); | |
739 | if (ret) { | |
740 | ret = -EIO; | |
741 | goto out; | |
742 | } | |
743 | ||
744 | backlight_update_status(bl); | |
745 | ||
c7c06d8a MH |
746 | dev_info(&client->dev, "%s Rev.%d Backlight\n", |
747 | client->name, data->revid); | |
82fd53b7 MH |
748 | |
749 | if (pdata->num_leds) | |
750 | adp8860_led_probe(client); | |
751 | ||
752 | return 0; | |
753 | ||
754 | out: | |
c7c06d8a | 755 | if (data->en_ambl_sens) |
82fd53b7 MH |
756 | sysfs_remove_group(&data->bl->dev.kobj, |
757 | &adp8860_bl_attr_group); | |
758 | out1: | |
759 | backlight_device_unregister(bl); | |
760 | out2: | |
82fd53b7 MH |
761 | kfree(data); |
762 | ||
763 | return ret; | |
764 | } | |
765 | ||
766 | static int __devexit adp8860_remove(struct i2c_client *client) | |
767 | { | |
768 | struct adp8860_bl *data = i2c_get_clientdata(client); | |
769 | ||
770 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); | |
771 | ||
772 | if (data->led) | |
773 | adp8860_led_remove(client); | |
774 | ||
c7c06d8a | 775 | if (data->en_ambl_sens) |
82fd53b7 MH |
776 | sysfs_remove_group(&data->bl->dev.kobj, |
777 | &adp8860_bl_attr_group); | |
778 | ||
779 | backlight_device_unregister(data->bl); | |
82fd53b7 MH |
780 | kfree(data); |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | #ifdef CONFIG_PM | |
786 | static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message) | |
787 | { | |
788 | adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | static int adp8860_i2c_resume(struct i2c_client *client) | |
794 | { | |
795 | adp8860_set_bits(client, ADP8860_MDCR, NSTBY); | |
796 | ||
797 | return 0; | |
798 | } | |
799 | #else | |
800 | #define adp8860_i2c_suspend NULL | |
801 | #define adp8860_i2c_resume NULL | |
802 | #endif | |
803 | ||
804 | static const struct i2c_device_id adp8860_id[] = { | |
c7c06d8a MH |
805 | { "adp8860", adp8860 }, |
806 | { "adp8861", adp8861 }, | |
807 | { "adp8863", adp8863 }, | |
82fd53b7 MH |
808 | { } |
809 | }; | |
810 | MODULE_DEVICE_TABLE(i2c, adp8860_id); | |
811 | ||
812 | static struct i2c_driver adp8860_driver = { | |
813 | .driver = { | |
814 | .name = KBUILD_MODNAME, | |
815 | }, | |
816 | .probe = adp8860_probe, | |
817 | .remove = __devexit_p(adp8860_remove), | |
818 | .suspend = adp8860_i2c_suspend, | |
819 | .resume = adp8860_i2c_resume, | |
820 | .id_table = adp8860_id, | |
821 | }; | |
822 | ||
823 | static int __init adp8860_init(void) | |
824 | { | |
825 | return i2c_add_driver(&adp8860_driver); | |
826 | } | |
827 | module_init(adp8860_init); | |
828 | ||
829 | static void __exit adp8860_exit(void) | |
830 | { | |
831 | i2c_del_driver(&adp8860_driver); | |
832 | } | |
833 | module_exit(adp8860_exit); | |
834 | ||
835 | MODULE_LICENSE("GPL v2"); | |
836 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
837 | MODULE_DESCRIPTION("ADP8860 Backlight driver"); | |
838 | MODULE_ALIAS("i2c:adp8860-backlight"); |