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a59ec1e7 MH |
1 | /* |
2 | * Backlight driver for Analog Devices ADP8870 Backlight Devices | |
3 | * | |
4 | * Copyright 2009-2011 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
a59ec1e7 MH |
10 | #include <linux/init.h> |
11 | #include <linux/errno.h> | |
12 | #include <linux/pm.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/i2c.h> | |
15 | #include <linux/fb.h> | |
16 | #include <linux/backlight.h> | |
17 | #include <linux/leds.h> | |
18 | #include <linux/workqueue.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | #include <linux/i2c/adp8870.h> | |
22 | #define ADP8870_EXT_FEATURES | |
23 | #define ADP8870_USE_LEDS | |
24 | ||
25 | ||
26 | #define ADP8870_MFDVID 0x00 /* Manufacturer and device ID */ | |
27 | #define ADP8870_MDCR 0x01 /* Device mode and status */ | |
28 | #define ADP8870_INT_STAT 0x02 /* Interrupts status */ | |
29 | #define ADP8870_INT_EN 0x03 /* Interrupts enable */ | |
30 | #define ADP8870_CFGR 0x04 /* Configuration register */ | |
31 | #define ADP8870_BLSEL 0x05 /* Sink enable backlight or independent */ | |
32 | #define ADP8870_PWMLED 0x06 /* PWM Enable Selection Register */ | |
33 | #define ADP8870_BLOFF 0x07 /* Backlight off timeout */ | |
34 | #define ADP8870_BLDIM 0x08 /* Backlight dim timeout */ | |
35 | #define ADP8870_BLFR 0x09 /* Backlight fade in and out rates */ | |
36 | #define ADP8870_BLMX1 0x0A /* Backlight (Brightness Level 1-daylight) maximum current */ | |
37 | #define ADP8870_BLDM1 0x0B /* Backlight (Brightness Level 1-daylight) dim current */ | |
38 | #define ADP8870_BLMX2 0x0C /* Backlight (Brightness Level 2-bright) maximum current */ | |
39 | #define ADP8870_BLDM2 0x0D /* Backlight (Brightness Level 2-bright) dim current */ | |
40 | #define ADP8870_BLMX3 0x0E /* Backlight (Brightness Level 3-office) maximum current */ | |
41 | #define ADP8870_BLDM3 0x0F /* Backlight (Brightness Level 3-office) dim current */ | |
42 | #define ADP8870_BLMX4 0x10 /* Backlight (Brightness Level 4-indoor) maximum current */ | |
43 | #define ADP8870_BLDM4 0x11 /* Backlight (Brightness Level 4-indoor) dim current */ | |
44 | #define ADP8870_BLMX5 0x12 /* Backlight (Brightness Level 5-dark) maximum current */ | |
45 | #define ADP8870_BLDM5 0x13 /* Backlight (Brightness Level 5-dark) dim current */ | |
46 | #define ADP8870_ISCLAW 0x1A /* Independent sink current fade law register */ | |
47 | #define ADP8870_ISCC 0x1B /* Independent sink current control register */ | |
48 | #define ADP8870_ISCT1 0x1C /* Independent Sink Current Timer Register LED[7:5] */ | |
49 | #define ADP8870_ISCT2 0x1D /* Independent Sink Current Timer Register LED[4:1] */ | |
50 | #define ADP8870_ISCF 0x1E /* Independent sink current fade register */ | |
51 | #define ADP8870_ISC1 0x1F /* Independent Sink Current LED1 */ | |
52 | #define ADP8870_ISC2 0x20 /* Independent Sink Current LED2 */ | |
53 | #define ADP8870_ISC3 0x21 /* Independent Sink Current LED3 */ | |
54 | #define ADP8870_ISC4 0x22 /* Independent Sink Current LED4 */ | |
55 | #define ADP8870_ISC5 0x23 /* Independent Sink Current LED5 */ | |
56 | #define ADP8870_ISC6 0x24 /* Independent Sink Current LED6 */ | |
57 | #define ADP8870_ISC7 0x25 /* Independent Sink Current LED7 (Brightness Level 1-daylight) */ | |
58 | #define ADP8870_ISC7_L2 0x26 /* Independent Sink Current LED7 (Brightness Level 2-bright) */ | |
59 | #define ADP8870_ISC7_L3 0x27 /* Independent Sink Current LED7 (Brightness Level 3-office) */ | |
60 | #define ADP8870_ISC7_L4 0x28 /* Independent Sink Current LED7 (Brightness Level 4-indoor) */ | |
61 | #define ADP8870_ISC7_L5 0x29 /* Independent Sink Current LED7 (Brightness Level 5-dark) */ | |
62 | #define ADP8870_CMP_CTL 0x2D /* ALS Comparator Control Register */ | |
63 | #define ADP8870_ALS1_EN 0x2E /* Main ALS comparator level enable */ | |
64 | #define ADP8870_ALS2_EN 0x2F /* Second ALS comparator level enable */ | |
65 | #define ADP8870_ALS1_STAT 0x30 /* Main ALS Comparator Status Register */ | |
66 | #define ADP8870_ALS2_STAT 0x31 /* Second ALS Comparator Status Register */ | |
67 | #define ADP8870_L2TRP 0x32 /* L2 comparator reference */ | |
68 | #define ADP8870_L2HYS 0x33 /* L2 hysteresis */ | |
69 | #define ADP8870_L3TRP 0x34 /* L3 comparator reference */ | |
70 | #define ADP8870_L3HYS 0x35 /* L3 hysteresis */ | |
71 | #define ADP8870_L4TRP 0x36 /* L4 comparator reference */ | |
72 | #define ADP8870_L4HYS 0x37 /* L4 hysteresis */ | |
73 | #define ADP8870_L5TRP 0x38 /* L5 comparator reference */ | |
74 | #define ADP8870_L5HYS 0x39 /* L5 hysteresis */ | |
75 | #define ADP8870_PH1LEVL 0x40 /* First phototransistor ambient light level-low byte register */ | |
76 | #define ADP8870_PH1LEVH 0x41 /* First phototransistor ambient light level-high byte register */ | |
77 | #define ADP8870_PH2LEVL 0x42 /* Second phototransistor ambient light level-low byte register */ | |
78 | #define ADP8870_PH2LEVH 0x43 /* Second phototransistor ambient light level-high byte register */ | |
79 | ||
80 | #define ADP8870_MANUFID 0x3 /* Analog Devices AD8870 Manufacturer and device ID */ | |
81 | #define ADP8870_DEVID(x) ((x) & 0xF) | |
82 | #define ADP8870_MANID(x) ((x) >> 4) | |
83 | ||
84 | /* MDCR Device mode and status */ | |
85 | #define D7ALSEN (1 << 7) | |
86 | #define INT_CFG (1 << 6) | |
87 | #define NSTBY (1 << 5) | |
88 | #define DIM_EN (1 << 4) | |
89 | #define GDWN_DIS (1 << 3) | |
90 | #define SIS_EN (1 << 2) | |
91 | #define CMP_AUTOEN (1 << 1) | |
92 | #define BLEN (1 << 0) | |
93 | ||
94 | /* ADP8870_ALS1_EN Main ALS comparator level enable */ | |
95 | #define L5_EN (1 << 3) | |
96 | #define L4_EN (1 << 2) | |
97 | #define L3_EN (1 << 1) | |
98 | #define L2_EN (1 << 0) | |
99 | ||
100 | #define CFGR_BLV_SHIFT 3 | |
101 | #define CFGR_BLV_MASK 0x7 | |
102 | #define ADP8870_FLAG_LED_MASK 0xFF | |
103 | ||
104 | #define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) | |
105 | #define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) | |
106 | #define ALS_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1) | |
107 | ||
108 | struct adp8870_bl { | |
109 | struct i2c_client *client; | |
110 | struct backlight_device *bl; | |
111 | struct adp8870_led *led; | |
112 | struct adp8870_backlight_platform_data *pdata; | |
113 | struct mutex lock; | |
114 | unsigned long cached_daylight_max; | |
115 | int id; | |
116 | int revid; | |
117 | int current_brightness; | |
118 | }; | |
119 | ||
120 | struct adp8870_led { | |
121 | struct led_classdev cdev; | |
122 | struct work_struct work; | |
123 | struct i2c_client *client; | |
124 | enum led_brightness new_brightness; | |
125 | int id; | |
126 | int flags; | |
127 | }; | |
128 | ||
129 | static int adp8870_read(struct i2c_client *client, int reg, uint8_t *val) | |
130 | { | |
131 | int ret; | |
132 | ||
133 | ret = i2c_smbus_read_byte_data(client, reg); | |
134 | if (ret < 0) { | |
135 | dev_err(&client->dev, "failed reading at 0x%02x\n", reg); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | *val = ret; | |
140 | return 0; | |
141 | } | |
142 | ||
143 | ||
144 | static int adp8870_write(struct i2c_client *client, u8 reg, u8 val) | |
145 | { | |
146 | int ret = i2c_smbus_write_byte_data(client, reg, val); | |
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); | |
198 | adp8870_write(led->client, ADP8870_ISC1 + led->id - 1, | |
199 | led->new_brightness >> 1); | |
200 | } | |
201 | ||
202 | static void adp8870_led_set(struct led_classdev *led_cdev, | |
203 | enum led_brightness value) | |
204 | { | |
205 | struct adp8870_led *led; | |
206 | ||
207 | led = container_of(led_cdev, struct adp8870_led, cdev); | |
208 | led->new_brightness = value; | |
209 | /* | |
210 | * Use workqueue for IO since I2C operations can sleep. | |
211 | */ | |
212 | schedule_work(&led->work); | |
213 | } | |
214 | ||
215 | static int adp8870_led_setup(struct adp8870_led *led) | |
216 | { | |
217 | struct i2c_client *client = led->client; | |
218 | int ret = 0; | |
219 | ||
220 | ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0); | |
221 | if (ret) | |
222 | return ret; | |
223 | ||
224 | ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1)); | |
225 | if (ret) | |
226 | return ret; | |
227 | ||
228 | if (led->id > 4) | |
229 | ret = adp8870_set_bits(client, ADP8870_ISCT1, | |
230 | (led->flags & 0x3) << ((led->id - 5) * 2)); | |
231 | else | |
232 | ret = adp8870_set_bits(client, ADP8870_ISCT2, | |
233 | (led->flags & 0x3) << ((led->id - 1) * 2)); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | static int __devinit adp8870_led_probe(struct i2c_client *client) | |
239 | { | |
240 | struct adp8870_backlight_platform_data *pdata = | |
241 | client->dev.platform_data; | |
242 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
243 | struct adp8870_led *led, *led_dat; | |
244 | struct led_info *cur_led; | |
245 | int ret, i; | |
246 | ||
247 | ||
248 | led = kcalloc(pdata->num_leds, sizeof(*led), GFP_KERNEL); | |
249 | if (led == NULL) { | |
250 | dev_err(&client->dev, "failed to alloc memory\n"); | |
251 | return -ENOMEM; | |
252 | } | |
253 | ||
254 | ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); | |
255 | if (ret) | |
256 | goto err_free; | |
257 | ||
258 | ret = adp8870_write(client, ADP8870_ISCT1, | |
259 | (pdata->led_on_time & 0x3) << 6); | |
260 | if (ret) | |
261 | goto err_free; | |
262 | ||
263 | ret = adp8870_write(client, ADP8870_ISCF, | |
264 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); | |
265 | if (ret) | |
266 | goto err_free; | |
267 | ||
268 | for (i = 0; i < pdata->num_leds; ++i) { | |
269 | cur_led = &pdata->leds[i]; | |
270 | led_dat = &led[i]; | |
271 | ||
272 | led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK; | |
273 | ||
274 | if (led_dat->id > 7 || led_dat->id < 1) { | |
275 | dev_err(&client->dev, "Invalid LED ID %d\n", | |
276 | led_dat->id); | |
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); | |
283 | goto err; | |
284 | } | |
285 | ||
286 | led_dat->cdev.name = cur_led->name; | |
287 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
288 | led_dat->cdev.brightness_set = adp8870_led_set; | |
289 | led_dat->cdev.brightness = LED_OFF; | |
290 | led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; | |
291 | led_dat->client = client; | |
292 | led_dat->new_brightness = LED_OFF; | |
293 | INIT_WORK(&led_dat->work, adp8870_led_work); | |
294 | ||
295 | ret = led_classdev_register(&client->dev, &led_dat->cdev); | |
296 | if (ret) { | |
297 | dev_err(&client->dev, "failed to register LED %d\n", | |
298 | led_dat->id); | |
299 | goto err; | |
300 | } | |
301 | ||
302 | ret = adp8870_led_setup(led_dat); | |
303 | if (ret) { | |
304 | dev_err(&client->dev, "failed to write\n"); | |
305 | i++; | |
306 | goto err; | |
307 | } | |
308 | } | |
309 | ||
310 | data->led = led; | |
311 | ||
312 | return 0; | |
313 | ||
314 | err: | |
315 | for (i = i - 1; i >= 0; --i) { | |
316 | led_classdev_unregister(&led[i].cdev); | |
317 | cancel_work_sync(&led[i].work); | |
318 | } | |
319 | ||
320 | err_free: | |
321 | kfree(led); | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
326 | static int __devexit adp8870_led_remove(struct i2c_client *client) | |
327 | { | |
328 | struct adp8870_backlight_platform_data *pdata = | |
329 | client->dev.platform_data; | |
330 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
331 | int i; | |
332 | ||
333 | for (i = 0; i < pdata->num_leds; i++) { | |
334 | led_classdev_unregister(&data->led[i].cdev); | |
335 | cancel_work_sync(&data->led[i].work); | |
336 | } | |
337 | ||
338 | kfree(data->led); | |
339 | return 0; | |
340 | } | |
341 | #else | |
342 | static int __devinit adp8870_led_probe(struct i2c_client *client) | |
343 | { | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static int __devexit adp8870_led_remove(struct i2c_client *client) | |
348 | { | |
349 | return 0; | |
350 | } | |
351 | #endif | |
352 | ||
353 | static int adp8870_bl_set(struct backlight_device *bl, int brightness) | |
354 | { | |
355 | struct adp8870_bl *data = bl_get_data(bl); | |
356 | struct i2c_client *client = data->client; | |
357 | int ret = 0; | |
358 | ||
359 | if (data->pdata->en_ambl_sens) { | |
360 | if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { | |
361 | /* Disable Ambient Light auto adjust */ | |
362 | ret = adp8870_clr_bits(client, ADP8870_MDCR, | |
363 | CMP_AUTOEN); | |
364 | if (ret) | |
365 | return ret; | |
366 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
367 | if (ret) | |
368 | return ret; | |
369 | } else { | |
370 | /* | |
371 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust | |
372 | * restore daylight l1 sysfs brightness | |
373 | */ | |
374 | ret = adp8870_write(client, ADP8870_BLMX1, | |
375 | data->cached_daylight_max); | |
376 | if (ret) | |
377 | return ret; | |
378 | ||
379 | ret = adp8870_set_bits(client, ADP8870_MDCR, | |
380 | CMP_AUTOEN); | |
381 | if (ret) | |
382 | return ret; | |
383 | } | |
384 | } else { | |
385 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
386 | if (ret) | |
387 | return ret; | |
388 | } | |
389 | ||
390 | if (data->current_brightness && brightness == 0) | |
391 | ret = adp8870_set_bits(client, | |
392 | ADP8870_MDCR, DIM_EN); | |
393 | else if (data->current_brightness == 0 && brightness) | |
394 | ret = adp8870_clr_bits(client, | |
395 | ADP8870_MDCR, DIM_EN); | |
396 | ||
397 | if (!ret) | |
398 | data->current_brightness = brightness; | |
399 | ||
400 | return ret; | |
401 | } | |
402 | ||
403 | static int adp8870_bl_update_status(struct backlight_device *bl) | |
404 | { | |
405 | int brightness = bl->props.brightness; | |
406 | if (bl->props.power != FB_BLANK_UNBLANK) | |
407 | brightness = 0; | |
408 | ||
409 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
410 | brightness = 0; | |
411 | ||
412 | return adp8870_bl_set(bl, brightness); | |
413 | } | |
414 | ||
415 | static int adp8870_bl_get_brightness(struct backlight_device *bl) | |
416 | { | |
417 | struct adp8870_bl *data = bl_get_data(bl); | |
418 | ||
419 | return data->current_brightness; | |
420 | } | |
421 | ||
422 | static const struct backlight_ops adp8870_bl_ops = { | |
423 | .update_status = adp8870_bl_update_status, | |
424 | .get_brightness = adp8870_bl_get_brightness, | |
425 | }; | |
426 | ||
427 | static int adp8870_bl_setup(struct backlight_device *bl) | |
428 | { | |
429 | struct adp8870_bl *data = bl_get_data(bl); | |
430 | struct i2c_client *client = data->client; | |
431 | struct adp8870_backlight_platform_data *pdata = data->pdata; | |
432 | int ret = 0; | |
433 | ||
434 | ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); | |
435 | if (ret) | |
436 | return ret; | |
437 | ||
438 | ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); | |
439 | if (ret) | |
440 | return ret; | |
441 | ||
442 | ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); | |
443 | if (ret) | |
444 | return ret; | |
445 | ||
446 | ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); | |
447 | if (ret) | |
448 | return ret; | |
449 | ||
450 | if (pdata->en_ambl_sens) { | |
451 | data->cached_daylight_max = pdata->l1_daylight_max; | |
452 | ret = adp8870_write(client, ADP8870_BLMX2, | |
453 | pdata->l2_bright_max); | |
454 | if (ret) | |
455 | return ret; | |
456 | ret = adp8870_write(client, ADP8870_BLDM2, | |
457 | pdata->l2_bright_dim); | |
458 | if (ret) | |
459 | return ret; | |
460 | ||
461 | ret = adp8870_write(client, ADP8870_BLMX3, | |
462 | pdata->l3_office_max); | |
463 | if (ret) | |
464 | return ret; | |
465 | ret = adp8870_write(client, ADP8870_BLDM3, | |
466 | pdata->l3_office_dim); | |
467 | if (ret) | |
468 | return ret; | |
469 | ||
470 | ret = adp8870_write(client, ADP8870_BLMX4, | |
471 | pdata->l4_indoor_max); | |
472 | if (ret) | |
473 | return ret; | |
474 | ||
475 | ret = adp8870_write(client, ADP8870_BLDM4, | |
476 | pdata->l4_indor_dim); | |
477 | if (ret) | |
478 | return ret; | |
479 | ||
480 | ret = adp8870_write(client, ADP8870_BLMX5, | |
481 | pdata->l5_dark_max); | |
482 | if (ret) | |
483 | return ret; | |
484 | ||
485 | ret = adp8870_write(client, ADP8870_BLDM5, | |
486 | pdata->l5_dark_dim); | |
487 | if (ret) | |
488 | return ret; | |
489 | ||
490 | ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); | |
491 | if (ret) | |
492 | return ret; | |
493 | ||
494 | ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); | |
495 | if (ret) | |
496 | return ret; | |
497 | ||
498 | ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); | |
499 | if (ret) | |
500 | return ret; | |
501 | ||
502 | ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); | |
503 | if (ret) | |
504 | return ret; | |
505 | ||
506 | ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); | |
507 | if (ret) | |
508 | return ret; | |
509 | ||
510 | ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); | |
511 | if (ret) | |
512 | return ret; | |
513 | ||
514 | ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); | |
515 | if (ret) | |
516 | return ret; | |
517 | ||
518 | ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); | |
519 | if (ret) | |
520 | return ret; | |
521 | ||
522 | ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | | |
523 | L3_EN | L2_EN); | |
524 | if (ret) | |
525 | return ret; | |
526 | ||
527 | ret = adp8870_write(client, ADP8870_CMP_CTL, | |
528 | ALS_CMPR_CFG_VAL(pdata->abml_filt)); | |
529 | if (ret) | |
530 | return ret; | |
531 | } | |
532 | ||
533 | ret = adp8870_write(client, ADP8870_CFGR, | |
534 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
535 | if (ret) | |
536 | return ret; | |
537 | ||
538 | ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, | |
539 | pdata->bl_fade_out)); | |
540 | if (ret) | |
541 | return ret; | |
542 | /* | |
543 | * ADP8870 Rev0 requires GDWN_DIS bit set | |
544 | */ | |
545 | ||
546 | ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | | |
547 | (data->revid == 0 ? GDWN_DIS : 0)); | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | static ssize_t adp8870_show(struct device *dev, char *buf, int reg) | |
553 | { | |
554 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
555 | int error; | |
556 | uint8_t reg_val; | |
557 | ||
558 | mutex_lock(&data->lock); | |
559 | error = adp8870_read(data->client, reg, ®_val); | |
560 | mutex_unlock(&data->lock); | |
561 | ||
562 | if (error < 0) | |
563 | return error; | |
564 | ||
565 | return sprintf(buf, "%u\n", reg_val); | |
566 | } | |
567 | ||
568 | static ssize_t adp8870_store(struct device *dev, const char *buf, | |
569 | size_t count, int reg) | |
570 | { | |
571 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
572 | unsigned long val; | |
573 | int ret; | |
574 | ||
575 | ret = strict_strtoul(buf, 10, &val); | |
576 | if (ret) | |
577 | return ret; | |
578 | ||
579 | mutex_lock(&data->lock); | |
580 | adp8870_write(data->client, reg, val); | |
581 | mutex_unlock(&data->lock); | |
582 | ||
583 | return count; | |
584 | } | |
585 | ||
586 | static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, | |
587 | struct device_attribute *attr, char *buf) | |
588 | { | |
589 | return adp8870_show(dev, buf, ADP8870_BLMX5); | |
590 | } | |
591 | ||
592 | static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, | |
593 | struct device_attribute *attr, const char *buf, size_t count) | |
594 | { | |
595 | return adp8870_store(dev, buf, count, ADP8870_BLMX5); | |
596 | } | |
597 | static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, | |
598 | adp8870_bl_l5_dark_max_store); | |
599 | ||
600 | ||
601 | static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, | |
602 | struct device_attribute *attr, char *buf) | |
603 | { | |
604 | return adp8870_show(dev, buf, ADP8870_BLMX4); | |
605 | } | |
606 | ||
607 | static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, | |
608 | struct device_attribute *attr, const char *buf, size_t count) | |
609 | { | |
610 | return adp8870_store(dev, buf, count, ADP8870_BLMX4); | |
611 | } | |
612 | static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, | |
613 | adp8870_bl_l4_indoor_max_store); | |
614 | ||
615 | ||
616 | static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, | |
617 | struct device_attribute *attr, char *buf) | |
618 | { | |
619 | return adp8870_show(dev, buf, ADP8870_BLMX3); | |
620 | } | |
621 | ||
622 | static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, | |
623 | struct device_attribute *attr, const char *buf, size_t count) | |
624 | { | |
625 | return adp8870_store(dev, buf, count, ADP8870_BLMX3); | |
626 | } | |
627 | ||
628 | static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, | |
629 | adp8870_bl_l3_office_max_store); | |
630 | ||
631 | static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, | |
632 | struct device_attribute *attr, char *buf) | |
633 | { | |
634 | return adp8870_show(dev, buf, ADP8870_BLMX2); | |
635 | } | |
636 | ||
637 | static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, | |
638 | struct device_attribute *attr, const char *buf, size_t count) | |
639 | { | |
640 | return adp8870_store(dev, buf, count, ADP8870_BLMX2); | |
641 | } | |
642 | static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, | |
643 | adp8870_bl_l2_bright_max_store); | |
644 | ||
645 | static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, | |
646 | struct device_attribute *attr, char *buf) | |
647 | { | |
648 | return adp8870_show(dev, buf, ADP8870_BLMX1); | |
649 | } | |
650 | ||
651 | static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, | |
652 | struct device_attribute *attr, const char *buf, size_t count) | |
653 | { | |
654 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
655 | int ret = strict_strtoul(buf, 10, &data->cached_daylight_max); | |
656 | if (ret) | |
657 | return ret; | |
658 | ||
659 | return adp8870_store(dev, buf, count, ADP8870_BLMX1); | |
660 | } | |
661 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, | |
662 | adp8870_bl_l1_daylight_max_store); | |
663 | ||
664 | static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, | |
665 | struct device_attribute *attr, char *buf) | |
666 | { | |
667 | return adp8870_show(dev, buf, ADP8870_BLDM5); | |
668 | } | |
669 | ||
670 | static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, | |
671 | struct device_attribute *attr, | |
672 | const char *buf, size_t count) | |
673 | { | |
674 | return adp8870_store(dev, buf, count, ADP8870_BLDM5); | |
675 | } | |
676 | static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, | |
677 | adp8870_bl_l5_dark_dim_store); | |
678 | ||
679 | static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, | |
680 | struct device_attribute *attr, char *buf) | |
681 | { | |
682 | return adp8870_show(dev, buf, ADP8870_BLDM4); | |
683 | } | |
684 | ||
685 | static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, | |
686 | struct device_attribute *attr, | |
687 | const char *buf, size_t count) | |
688 | { | |
689 | return adp8870_store(dev, buf, count, ADP8870_BLDM4); | |
690 | } | |
691 | static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, | |
692 | adp8870_bl_l4_indoor_dim_store); | |
693 | ||
694 | ||
695 | static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, | |
696 | struct device_attribute *attr, char *buf) | |
697 | { | |
698 | return adp8870_show(dev, buf, ADP8870_BLDM3); | |
699 | } | |
700 | ||
701 | static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, | |
702 | struct device_attribute *attr, | |
703 | const char *buf, size_t count) | |
704 | { | |
705 | return adp8870_store(dev, buf, count, ADP8870_BLDM3); | |
706 | } | |
707 | static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, | |
708 | adp8870_bl_l3_office_dim_store); | |
709 | ||
710 | static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, | |
711 | struct device_attribute *attr, char *buf) | |
712 | { | |
713 | return adp8870_show(dev, buf, ADP8870_BLDM2); | |
714 | } | |
715 | ||
716 | static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, | |
717 | struct device_attribute *attr, | |
718 | const char *buf, size_t count) | |
719 | { | |
720 | return adp8870_store(dev, buf, count, ADP8870_BLDM2); | |
721 | } | |
722 | static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, | |
723 | adp8870_bl_l2_bright_dim_store); | |
724 | ||
725 | static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, | |
726 | struct device_attribute *attr, char *buf) | |
727 | { | |
728 | return adp8870_show(dev, buf, ADP8870_BLDM1); | |
729 | } | |
730 | ||
731 | static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, | |
732 | struct device_attribute *attr, | |
733 | const char *buf, size_t count) | |
734 | { | |
735 | return adp8870_store(dev, buf, count, ADP8870_BLDM1); | |
736 | } | |
737 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, | |
738 | adp8870_bl_l1_daylight_dim_store); | |
739 | ||
740 | #ifdef ADP8870_EXT_FEATURES | |
741 | static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, | |
742 | struct device_attribute *attr, char *buf) | |
743 | { | |
744 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
745 | int error; | |
746 | uint8_t reg_val; | |
747 | uint16_t ret_val; | |
748 | ||
749 | mutex_lock(&data->lock); | |
750 | error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); | |
751 | if (error < 0) { | |
752 | mutex_unlock(&data->lock); | |
753 | return error; | |
754 | } | |
755 | ret_val = reg_val; | |
756 | error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); | |
757 | mutex_unlock(&data->lock); | |
758 | ||
759 | if (error < 0) | |
760 | return error; | |
761 | ||
762 | /* Return 13-bit conversion value for the first light sensor */ | |
763 | ret_val += (reg_val & 0x1F) << 8; | |
764 | ||
765 | return sprintf(buf, "%u\n", ret_val); | |
766 | } | |
767 | static DEVICE_ATTR(ambient_light_level, 0444, | |
768 | adp8870_bl_ambient_light_level_show, NULL); | |
769 | ||
770 | static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, | |
771 | struct device_attribute *attr, char *buf) | |
772 | { | |
773 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
774 | int error; | |
775 | uint8_t reg_val; | |
776 | ||
777 | mutex_lock(&data->lock); | |
778 | error = adp8870_read(data->client, ADP8870_CFGR, ®_val); | |
779 | mutex_unlock(&data->lock); | |
780 | ||
781 | if (error < 0) | |
782 | return error; | |
783 | ||
784 | return sprintf(buf, "%u\n", | |
785 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); | |
786 | } | |
787 | ||
788 | static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, | |
789 | struct device_attribute *attr, | |
790 | const char *buf, size_t count) | |
791 | { | |
792 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
793 | unsigned long val; | |
794 | uint8_t reg_val; | |
795 | int ret; | |
796 | ||
797 | ret = strict_strtoul(buf, 10, &val); | |
798 | if (ret) | |
799 | return ret; | |
800 | ||
801 | if (val == 0) { | |
802 | /* Enable automatic ambient light sensing */ | |
803 | adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); | |
804 | } else if ((val > 0) && (val < 6)) { | |
805 | /* Disable automatic ambient light sensing */ | |
806 | adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); | |
807 | ||
808 | /* Set user supplied ambient light zone */ | |
809 | mutex_lock(&data->lock); | |
810 | adp8870_read(data->client, ADP8870_CFGR, ®_val); | |
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 | mutex_unlock(&data->lock); | |
815 | } | |
816 | ||
817 | return count; | |
818 | } | |
819 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
820 | adp8870_bl_ambient_light_zone_show, | |
821 | adp8870_bl_ambient_light_zone_store); | |
822 | #endif | |
823 | ||
824 | static struct attribute *adp8870_bl_attributes[] = { | |
825 | &dev_attr_l5_dark_max.attr, | |
826 | &dev_attr_l5_dark_dim.attr, | |
827 | &dev_attr_l4_indoor_max.attr, | |
828 | &dev_attr_l4_indoor_dim.attr, | |
829 | &dev_attr_l3_office_max.attr, | |
830 | &dev_attr_l3_office_dim.attr, | |
831 | &dev_attr_l2_bright_max.attr, | |
832 | &dev_attr_l2_bright_dim.attr, | |
833 | &dev_attr_l1_daylight_max.attr, | |
834 | &dev_attr_l1_daylight_dim.attr, | |
835 | #ifdef ADP8870_EXT_FEATURES | |
836 | &dev_attr_ambient_light_level.attr, | |
837 | &dev_attr_ambient_light_zone.attr, | |
838 | #endif | |
839 | NULL | |
840 | }; | |
841 | ||
842 | static const struct attribute_group adp8870_bl_attr_group = { | |
843 | .attrs = adp8870_bl_attributes, | |
844 | }; | |
845 | ||
846 | static int __devinit adp8870_probe(struct i2c_client *client, | |
847 | const struct i2c_device_id *id) | |
848 | { | |
849 | struct backlight_properties props; | |
850 | struct backlight_device *bl; | |
851 | struct adp8870_bl *data; | |
852 | struct adp8870_backlight_platform_data *pdata = | |
853 | client->dev.platform_data; | |
854 | uint8_t reg_val; | |
855 | int ret; | |
856 | ||
857 | if (!i2c_check_functionality(client->adapter, | |
858 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
859 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
860 | return -EIO; | |
861 | } | |
862 | ||
863 | if (!pdata) { | |
864 | dev_err(&client->dev, "no platform data?\n"); | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | ret = adp8870_read(client, ADP8870_MFDVID, ®_val); | |
869 | if (ret < 0) | |
870 | return -EIO; | |
871 | ||
872 | if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { | |
873 | dev_err(&client->dev, "failed to probe\n"); | |
874 | return -ENODEV; | |
875 | } | |
876 | ||
877 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
878 | if (data == NULL) | |
879 | return -ENOMEM; | |
880 | ||
881 | data->revid = ADP8870_DEVID(reg_val); | |
882 | data->client = client; | |
883 | data->pdata = pdata; | |
884 | data->id = id->driver_data; | |
885 | data->current_brightness = 0; | |
886 | i2c_set_clientdata(client, data); | |
887 | ||
888 | mutex_init(&data->lock); | |
889 | ||
890 | memset(&props, 0, sizeof(props)); | |
e1bbd19b | 891 | props.type = BACKLIGHT_RAW; |
a59ec1e7 MH |
892 | props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; |
893 | bl = backlight_device_register(dev_driver_string(&client->dev), | |
894 | &client->dev, data, &adp8870_bl_ops, &props); | |
895 | if (IS_ERR(bl)) { | |
896 | dev_err(&client->dev, "failed to register backlight\n"); | |
897 | ret = PTR_ERR(bl); | |
898 | goto out2; | |
899 | } | |
900 | ||
901 | data->bl = bl; | |
902 | ||
903 | if (pdata->en_ambl_sens) | |
904 | ret = sysfs_create_group(&bl->dev.kobj, | |
905 | &adp8870_bl_attr_group); | |
906 | ||
907 | if (ret) { | |
908 | dev_err(&client->dev, "failed to register sysfs\n"); | |
909 | goto out1; | |
910 | } | |
911 | ||
912 | ret = adp8870_bl_setup(bl); | |
913 | if (ret) { | |
914 | ret = -EIO; | |
915 | goto out; | |
916 | } | |
917 | ||
918 | backlight_update_status(bl); | |
919 | ||
920 | dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); | |
921 | ||
922 | if (pdata->num_leds) | |
923 | adp8870_led_probe(client); | |
924 | ||
925 | return 0; | |
926 | ||
927 | out: | |
928 | if (data->pdata->en_ambl_sens) | |
929 | sysfs_remove_group(&data->bl->dev.kobj, | |
930 | &adp8870_bl_attr_group); | |
931 | out1: | |
932 | backlight_device_unregister(bl); | |
933 | out2: | |
a59ec1e7 MH |
934 | kfree(data); |
935 | ||
936 | return ret; | |
937 | } | |
938 | ||
939 | static int __devexit adp8870_remove(struct i2c_client *client) | |
940 | { | |
941 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
942 | ||
943 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); | |
944 | ||
945 | if (data->led) | |
946 | adp8870_led_remove(client); | |
947 | ||
948 | if (data->pdata->en_ambl_sens) | |
949 | sysfs_remove_group(&data->bl->dev.kobj, | |
950 | &adp8870_bl_attr_group); | |
951 | ||
952 | backlight_device_unregister(data->bl); | |
a59ec1e7 MH |
953 | kfree(data); |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | #ifdef CONFIG_PM | |
959 | static int adp8870_i2c_suspend(struct i2c_client *client, pm_message_t message) | |
960 | { | |
961 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); | |
962 | ||
963 | return 0; | |
964 | } | |
965 | ||
966 | static int adp8870_i2c_resume(struct i2c_client *client) | |
967 | { | |
968 | adp8870_set_bits(client, ADP8870_MDCR, NSTBY); | |
969 | ||
970 | return 0; | |
971 | } | |
972 | #else | |
973 | #define adp8870_i2c_suspend NULL | |
974 | #define adp8870_i2c_resume NULL | |
975 | #endif | |
976 | ||
977 | static const struct i2c_device_id adp8870_id[] = { | |
978 | { "adp8870", 0 }, | |
979 | { } | |
980 | }; | |
981 | MODULE_DEVICE_TABLE(i2c, adp8870_id); | |
982 | ||
983 | static struct i2c_driver adp8870_driver = { | |
984 | .driver = { | |
985 | .name = KBUILD_MODNAME, | |
986 | }, | |
987 | .probe = adp8870_probe, | |
988 | .remove = __devexit_p(adp8870_remove), | |
989 | .suspend = adp8870_i2c_suspend, | |
990 | .resume = adp8870_i2c_resume, | |
991 | .id_table = adp8870_id, | |
992 | }; | |
993 | ||
81ce6864 | 994 | module_i2c_driver(adp8870_driver); |
a59ec1e7 MH |
995 | |
996 | MODULE_LICENSE("GPL v2"); | |
997 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
998 | MODULE_DESCRIPTION("ADP8870 Backlight driver"); | |
c53252b7 | 999 | MODULE_ALIAS("i2c:adp8870-backlight"); |