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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 | ||
056d6ff4 | 21 | #include <linux/platform_data/adp8870.h> |
a59ec1e7 MH |
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); | |
fe9a8623 | 147 | |
a59ec1e7 MH |
148 | if (ret) |
149 | dev_err(&client->dev, "failed to write\n"); | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
154 | static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
155 | { | |
156 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
157 | uint8_t reg_val; | |
158 | int ret; | |
159 | ||
160 | mutex_lock(&data->lock); | |
161 | ||
162 | ret = adp8870_read(client, reg, ®_val); | |
163 | ||
36c3e759 | 164 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
a59ec1e7 MH |
165 | reg_val |= bit_mask; |
166 | ret = adp8870_write(client, reg, reg_val); | |
167 | } | |
168 | ||
169 | mutex_unlock(&data->lock); | |
170 | return ret; | |
171 | } | |
172 | ||
173 | static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) | |
174 | { | |
175 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
176 | uint8_t reg_val; | |
177 | int ret; | |
178 | ||
179 | mutex_lock(&data->lock); | |
180 | ||
181 | ret = adp8870_read(client, reg, ®_val); | |
182 | ||
183 | if (!ret && (reg_val & bit_mask)) { | |
184 | reg_val &= ~bit_mask; | |
185 | ret = adp8870_write(client, reg, reg_val); | |
186 | } | |
187 | ||
188 | mutex_unlock(&data->lock); | |
189 | return ret; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Independent sink / LED | |
194 | */ | |
195 | #if defined(ADP8870_USE_LEDS) | |
196 | static void adp8870_led_work(struct work_struct *work) | |
197 | { | |
198 | struct adp8870_led *led = container_of(work, struct adp8870_led, work); | |
fe9a8623 | 199 | |
a59ec1e7 MH |
200 | adp8870_write(led->client, ADP8870_ISC1 + led->id - 1, |
201 | led->new_brightness >> 1); | |
202 | } | |
203 | ||
204 | static void adp8870_led_set(struct led_classdev *led_cdev, | |
205 | enum led_brightness value) | |
206 | { | |
207 | struct adp8870_led *led; | |
208 | ||
209 | led = container_of(led_cdev, struct adp8870_led, cdev); | |
210 | led->new_brightness = value; | |
211 | /* | |
212 | * Use workqueue for IO since I2C operations can sleep. | |
213 | */ | |
214 | schedule_work(&led->work); | |
215 | } | |
216 | ||
217 | static int adp8870_led_setup(struct adp8870_led *led) | |
218 | { | |
219 | struct i2c_client *client = led->client; | |
220 | int ret = 0; | |
221 | ||
222 | ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0); | |
223 | if (ret) | |
224 | return ret; | |
225 | ||
226 | ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1)); | |
227 | if (ret) | |
228 | return ret; | |
229 | ||
230 | if (led->id > 4) | |
231 | ret = adp8870_set_bits(client, ADP8870_ISCT1, | |
232 | (led->flags & 0x3) << ((led->id - 5) * 2)); | |
233 | else | |
234 | ret = adp8870_set_bits(client, ADP8870_ISCT2, | |
235 | (led->flags & 0x3) << ((led->id - 1) * 2)); | |
236 | ||
237 | return ret; | |
238 | } | |
239 | ||
1b9e450d | 240 | static int adp8870_led_probe(struct i2c_client *client) |
a59ec1e7 MH |
241 | { |
242 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 243 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
244 | struct adp8870_bl *data = i2c_get_clientdata(client); |
245 | struct adp8870_led *led, *led_dat; | |
246 | struct led_info *cur_led; | |
247 | int ret, i; | |
248 | ||
91cdb239 JH |
249 | led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led), |
250 | GFP_KERNEL); | |
0167a956 | 251 | if (led == NULL) |
a59ec1e7 | 252 | return -ENOMEM; |
a59ec1e7 MH |
253 | |
254 | ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); | |
255 | if (ret) | |
91cdb239 | 256 | return ret; |
a59ec1e7 MH |
257 | |
258 | ret = adp8870_write(client, ADP8870_ISCT1, | |
259 | (pdata->led_on_time & 0x3) << 6); | |
260 | if (ret) | |
91cdb239 | 261 | return ret; |
a59ec1e7 MH |
262 | |
263 | ret = adp8870_write(client, ADP8870_ISCF, | |
264 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); | |
265 | if (ret) | |
91cdb239 | 266 | return ret; |
a59ec1e7 MH |
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); | |
514f920a | 277 | ret = -EINVAL; |
a59ec1e7 MH |
278 | goto err; |
279 | } | |
280 | ||
281 | if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { | |
282 | dev_err(&client->dev, "LED %d used by Backlight\n", | |
283 | led_dat->id); | |
514f920a | 284 | ret = -EBUSY; |
a59ec1e7 MH |
285 | goto err; |
286 | } | |
287 | ||
288 | led_dat->cdev.name = cur_led->name; | |
289 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
290 | led_dat->cdev.brightness_set = adp8870_led_set; | |
291 | led_dat->cdev.brightness = LED_OFF; | |
292 | led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; | |
293 | led_dat->client = client; | |
294 | led_dat->new_brightness = LED_OFF; | |
295 | INIT_WORK(&led_dat->work, adp8870_led_work); | |
296 | ||
297 | ret = led_classdev_register(&client->dev, &led_dat->cdev); | |
298 | if (ret) { | |
299 | dev_err(&client->dev, "failed to register LED %d\n", | |
300 | led_dat->id); | |
301 | goto err; | |
302 | } | |
303 | ||
304 | ret = adp8870_led_setup(led_dat); | |
305 | if (ret) { | |
306 | dev_err(&client->dev, "failed to write\n"); | |
307 | i++; | |
308 | goto err; | |
309 | } | |
310 | } | |
311 | ||
312 | data->led = led; | |
313 | ||
314 | return 0; | |
315 | ||
316 | err: | |
317 | for (i = i - 1; i >= 0; --i) { | |
318 | led_classdev_unregister(&led[i].cdev); | |
319 | cancel_work_sync(&led[i].work); | |
320 | } | |
321 | ||
a59ec1e7 MH |
322 | return ret; |
323 | } | |
324 | ||
7e4b9d0b | 325 | static int adp8870_led_remove(struct i2c_client *client) |
a59ec1e7 MH |
326 | { |
327 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 328 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
329 | struct adp8870_bl *data = i2c_get_clientdata(client); |
330 | int i; | |
331 | ||
332 | for (i = 0; i < pdata->num_leds; i++) { | |
333 | led_classdev_unregister(&data->led[i].cdev); | |
334 | cancel_work_sync(&data->led[i].work); | |
335 | } | |
336 | ||
a59ec1e7 MH |
337 | return 0; |
338 | } | |
339 | #else | |
1b9e450d | 340 | static int adp8870_led_probe(struct i2c_client *client) |
a59ec1e7 MH |
341 | { |
342 | return 0; | |
343 | } | |
344 | ||
7e4b9d0b | 345 | static int adp8870_led_remove(struct i2c_client *client) |
a59ec1e7 MH |
346 | { |
347 | return 0; | |
348 | } | |
349 | #endif | |
350 | ||
351 | static int adp8870_bl_set(struct backlight_device *bl, int brightness) | |
352 | { | |
353 | struct adp8870_bl *data = bl_get_data(bl); | |
354 | struct i2c_client *client = data->client; | |
355 | int ret = 0; | |
356 | ||
357 | if (data->pdata->en_ambl_sens) { | |
358 | if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { | |
359 | /* Disable Ambient Light auto adjust */ | |
360 | ret = adp8870_clr_bits(client, ADP8870_MDCR, | |
361 | CMP_AUTOEN); | |
362 | if (ret) | |
363 | return ret; | |
364 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
365 | if (ret) | |
366 | return ret; | |
367 | } else { | |
368 | /* | |
369 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust | |
370 | * restore daylight l1 sysfs brightness | |
371 | */ | |
372 | ret = adp8870_write(client, ADP8870_BLMX1, | |
373 | data->cached_daylight_max); | |
374 | if (ret) | |
375 | return ret; | |
376 | ||
377 | ret = adp8870_set_bits(client, ADP8870_MDCR, | |
378 | CMP_AUTOEN); | |
379 | if (ret) | |
380 | return ret; | |
381 | } | |
382 | } else { | |
383 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); | |
384 | if (ret) | |
385 | return ret; | |
386 | } | |
387 | ||
388 | if (data->current_brightness && brightness == 0) | |
389 | ret = adp8870_set_bits(client, | |
390 | ADP8870_MDCR, DIM_EN); | |
391 | else if (data->current_brightness == 0 && brightness) | |
392 | ret = adp8870_clr_bits(client, | |
393 | ADP8870_MDCR, DIM_EN); | |
394 | ||
395 | if (!ret) | |
396 | data->current_brightness = brightness; | |
397 | ||
398 | return ret; | |
399 | } | |
400 | ||
401 | static int adp8870_bl_update_status(struct backlight_device *bl) | |
402 | { | |
403 | int brightness = bl->props.brightness; | |
fe9a8623 | 404 | |
a59ec1e7 MH |
405 | if (bl->props.power != FB_BLANK_UNBLANK) |
406 | brightness = 0; | |
407 | ||
408 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) | |
409 | brightness = 0; | |
410 | ||
411 | return adp8870_bl_set(bl, brightness); | |
412 | } | |
413 | ||
414 | static int adp8870_bl_get_brightness(struct backlight_device *bl) | |
415 | { | |
416 | struct adp8870_bl *data = bl_get_data(bl); | |
417 | ||
418 | return data->current_brightness; | |
419 | } | |
420 | ||
421 | static const struct backlight_ops adp8870_bl_ops = { | |
422 | .update_status = adp8870_bl_update_status, | |
423 | .get_brightness = adp8870_bl_get_brightness, | |
424 | }; | |
425 | ||
426 | static int adp8870_bl_setup(struct backlight_device *bl) | |
427 | { | |
428 | struct adp8870_bl *data = bl_get_data(bl); | |
429 | struct i2c_client *client = data->client; | |
430 | struct adp8870_backlight_platform_data *pdata = data->pdata; | |
431 | int ret = 0; | |
432 | ||
433 | ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); | |
434 | if (ret) | |
435 | return ret; | |
436 | ||
437 | ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); | |
438 | if (ret) | |
439 | return ret; | |
440 | ||
441 | ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); | |
442 | if (ret) | |
443 | return ret; | |
444 | ||
445 | ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); | |
446 | if (ret) | |
447 | return ret; | |
448 | ||
449 | if (pdata->en_ambl_sens) { | |
450 | data->cached_daylight_max = pdata->l1_daylight_max; | |
451 | ret = adp8870_write(client, ADP8870_BLMX2, | |
452 | pdata->l2_bright_max); | |
453 | if (ret) | |
454 | return ret; | |
455 | ret = adp8870_write(client, ADP8870_BLDM2, | |
456 | pdata->l2_bright_dim); | |
457 | if (ret) | |
458 | return ret; | |
459 | ||
460 | ret = adp8870_write(client, ADP8870_BLMX3, | |
461 | pdata->l3_office_max); | |
462 | if (ret) | |
463 | return ret; | |
464 | ret = adp8870_write(client, ADP8870_BLDM3, | |
465 | pdata->l3_office_dim); | |
466 | if (ret) | |
467 | return ret; | |
468 | ||
469 | ret = adp8870_write(client, ADP8870_BLMX4, | |
470 | pdata->l4_indoor_max); | |
471 | if (ret) | |
472 | return ret; | |
473 | ||
474 | ret = adp8870_write(client, ADP8870_BLDM4, | |
475 | pdata->l4_indor_dim); | |
476 | if (ret) | |
477 | return ret; | |
478 | ||
479 | ret = adp8870_write(client, ADP8870_BLMX5, | |
480 | pdata->l5_dark_max); | |
481 | if (ret) | |
482 | return ret; | |
483 | ||
484 | ret = adp8870_write(client, ADP8870_BLDM5, | |
485 | pdata->l5_dark_dim); | |
486 | if (ret) | |
487 | return ret; | |
488 | ||
489 | ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); | |
490 | if (ret) | |
491 | return ret; | |
492 | ||
493 | ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); | |
494 | if (ret) | |
495 | return ret; | |
496 | ||
497 | ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); | |
498 | if (ret) | |
499 | return ret; | |
500 | ||
501 | ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); | |
502 | if (ret) | |
503 | return ret; | |
504 | ||
505 | ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); | |
506 | if (ret) | |
507 | return ret; | |
508 | ||
509 | ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); | |
510 | if (ret) | |
511 | return ret; | |
512 | ||
513 | ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); | |
514 | if (ret) | |
515 | return ret; | |
516 | ||
517 | ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); | |
518 | if (ret) | |
519 | return ret; | |
520 | ||
521 | ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | | |
522 | L3_EN | L2_EN); | |
523 | if (ret) | |
524 | return ret; | |
525 | ||
526 | ret = adp8870_write(client, ADP8870_CMP_CTL, | |
527 | ALS_CMPR_CFG_VAL(pdata->abml_filt)); | |
528 | if (ret) | |
529 | return ret; | |
530 | } | |
531 | ||
532 | ret = adp8870_write(client, ADP8870_CFGR, | |
533 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); | |
534 | if (ret) | |
535 | return ret; | |
536 | ||
537 | ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, | |
538 | pdata->bl_fade_out)); | |
539 | if (ret) | |
540 | return ret; | |
541 | /* | |
542 | * ADP8870 Rev0 requires GDWN_DIS bit set | |
543 | */ | |
544 | ||
545 | ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | | |
546 | (data->revid == 0 ? GDWN_DIS : 0)); | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
551 | static ssize_t adp8870_show(struct device *dev, char *buf, int reg) | |
552 | { | |
553 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
554 | int error; | |
555 | uint8_t reg_val; | |
556 | ||
557 | mutex_lock(&data->lock); | |
558 | error = adp8870_read(data->client, reg, ®_val); | |
559 | mutex_unlock(&data->lock); | |
560 | ||
561 | if (error < 0) | |
562 | return error; | |
563 | ||
564 | return sprintf(buf, "%u\n", reg_val); | |
565 | } | |
566 | ||
567 | static ssize_t adp8870_store(struct device *dev, const char *buf, | |
568 | size_t count, int reg) | |
569 | { | |
570 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
571 | unsigned long val; | |
572 | int ret; | |
573 | ||
dc406f56 | 574 | ret = kstrtoul(buf, 10, &val); |
a59ec1e7 MH |
575 | if (ret) |
576 | return ret; | |
577 | ||
578 | mutex_lock(&data->lock); | |
579 | adp8870_write(data->client, reg, val); | |
580 | mutex_unlock(&data->lock); | |
581 | ||
582 | return count; | |
583 | } | |
584 | ||
585 | static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, | |
586 | struct device_attribute *attr, char *buf) | |
587 | { | |
588 | return adp8870_show(dev, buf, ADP8870_BLMX5); | |
589 | } | |
590 | ||
591 | static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, | |
592 | struct device_attribute *attr, const char *buf, size_t count) | |
593 | { | |
594 | return adp8870_store(dev, buf, count, ADP8870_BLMX5); | |
595 | } | |
596 | static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, | |
597 | adp8870_bl_l5_dark_max_store); | |
598 | ||
599 | ||
600 | static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, | |
601 | struct device_attribute *attr, char *buf) | |
602 | { | |
603 | return adp8870_show(dev, buf, ADP8870_BLMX4); | |
604 | } | |
605 | ||
606 | static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, | |
607 | struct device_attribute *attr, const char *buf, size_t count) | |
608 | { | |
609 | return adp8870_store(dev, buf, count, ADP8870_BLMX4); | |
610 | } | |
611 | static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, | |
612 | adp8870_bl_l4_indoor_max_store); | |
613 | ||
614 | ||
615 | static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, | |
616 | struct device_attribute *attr, char *buf) | |
617 | { | |
618 | return adp8870_show(dev, buf, ADP8870_BLMX3); | |
619 | } | |
620 | ||
621 | static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, | |
622 | struct device_attribute *attr, const char *buf, size_t count) | |
623 | { | |
624 | return adp8870_store(dev, buf, count, ADP8870_BLMX3); | |
625 | } | |
626 | ||
627 | static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, | |
628 | adp8870_bl_l3_office_max_store); | |
629 | ||
630 | static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, | |
631 | struct device_attribute *attr, char *buf) | |
632 | { | |
633 | return adp8870_show(dev, buf, ADP8870_BLMX2); | |
634 | } | |
635 | ||
636 | static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, | |
637 | struct device_attribute *attr, const char *buf, size_t count) | |
638 | { | |
639 | return adp8870_store(dev, buf, count, ADP8870_BLMX2); | |
640 | } | |
641 | static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, | |
642 | adp8870_bl_l2_bright_max_store); | |
643 | ||
644 | static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, | |
645 | struct device_attribute *attr, char *buf) | |
646 | { | |
647 | return adp8870_show(dev, buf, ADP8870_BLMX1); | |
648 | } | |
649 | ||
650 | static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, | |
651 | struct device_attribute *attr, const char *buf, size_t count) | |
652 | { | |
653 | struct adp8870_bl *data = dev_get_drvdata(dev); | |
dc406f56 | 654 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
fe9a8623 | 655 | |
a59ec1e7 MH |
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 | ||
dc406f56 | 797 | ret = kstrtoul(buf, 10, &val); |
a59ec1e7 MH |
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); | |
86c68e2f AB |
810 | ret = adp8870_read(data->client, ADP8870_CFGR, ®_val); |
811 | if (!ret) { | |
812 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); | |
813 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; | |
814 | adp8870_write(data->client, ADP8870_CFGR, reg_val); | |
815 | } | |
a59ec1e7 MH |
816 | mutex_unlock(&data->lock); |
817 | } | |
818 | ||
819 | return count; | |
820 | } | |
821 | static DEVICE_ATTR(ambient_light_zone, 0664, | |
822 | adp8870_bl_ambient_light_zone_show, | |
823 | adp8870_bl_ambient_light_zone_store); | |
824 | #endif | |
825 | ||
826 | static struct attribute *adp8870_bl_attributes[] = { | |
827 | &dev_attr_l5_dark_max.attr, | |
828 | &dev_attr_l5_dark_dim.attr, | |
829 | &dev_attr_l4_indoor_max.attr, | |
830 | &dev_attr_l4_indoor_dim.attr, | |
831 | &dev_attr_l3_office_max.attr, | |
832 | &dev_attr_l3_office_dim.attr, | |
833 | &dev_attr_l2_bright_max.attr, | |
834 | &dev_attr_l2_bright_dim.attr, | |
835 | &dev_attr_l1_daylight_max.attr, | |
836 | &dev_attr_l1_daylight_dim.attr, | |
837 | #ifdef ADP8870_EXT_FEATURES | |
838 | &dev_attr_ambient_light_level.attr, | |
839 | &dev_attr_ambient_light_zone.attr, | |
840 | #endif | |
841 | NULL | |
842 | }; | |
843 | ||
844 | static const struct attribute_group adp8870_bl_attr_group = { | |
845 | .attrs = adp8870_bl_attributes, | |
846 | }; | |
847 | ||
1b9e450d | 848 | static int adp8870_probe(struct i2c_client *client, |
a59ec1e7 MH |
849 | const struct i2c_device_id *id) |
850 | { | |
851 | struct backlight_properties props; | |
852 | struct backlight_device *bl; | |
853 | struct adp8870_bl *data; | |
854 | struct adp8870_backlight_platform_data *pdata = | |
c512794c | 855 | dev_get_platdata(&client->dev); |
a59ec1e7 MH |
856 | uint8_t reg_val; |
857 | int ret; | |
858 | ||
859 | if (!i2c_check_functionality(client->adapter, | |
860 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
861 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
862 | return -EIO; | |
863 | } | |
864 | ||
865 | if (!pdata) { | |
866 | dev_err(&client->dev, "no platform data?\n"); | |
867 | return -EINVAL; | |
868 | } | |
869 | ||
870 | ret = adp8870_read(client, ADP8870_MFDVID, ®_val); | |
871 | if (ret < 0) | |
872 | return -EIO; | |
873 | ||
874 | if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { | |
875 | dev_err(&client->dev, "failed to probe\n"); | |
876 | return -ENODEV; | |
877 | } | |
878 | ||
91cdb239 | 879 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
a59ec1e7 MH |
880 | if (data == NULL) |
881 | return -ENOMEM; | |
882 | ||
883 | data->revid = ADP8870_DEVID(reg_val); | |
884 | data->client = client; | |
885 | data->pdata = pdata; | |
886 | data->id = id->driver_data; | |
887 | data->current_brightness = 0; | |
888 | i2c_set_clientdata(client, data); | |
889 | ||
890 | mutex_init(&data->lock); | |
891 | ||
892 | memset(&props, 0, sizeof(props)); | |
e1bbd19b | 893 | props.type = BACKLIGHT_RAW; |
a59ec1e7 | 894 | props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; |
568ee6c3 JH |
895 | bl = devm_backlight_device_register(&client->dev, |
896 | dev_driver_string(&client->dev), | |
897 | &client->dev, data, &adp8870_bl_ops, &props); | |
a59ec1e7 MH |
898 | if (IS_ERR(bl)) { |
899 | dev_err(&client->dev, "failed to register backlight\n"); | |
91cdb239 | 900 | return PTR_ERR(bl); |
a59ec1e7 MH |
901 | } |
902 | ||
903 | data->bl = bl; | |
904 | ||
8541b827 | 905 | if (pdata->en_ambl_sens) { |
a59ec1e7 MH |
906 | ret = sysfs_create_group(&bl->dev.kobj, |
907 | &adp8870_bl_attr_group); | |
8541b827 JH |
908 | if (ret) { |
909 | dev_err(&client->dev, "failed to register sysfs\n"); | |
568ee6c3 | 910 | return ret; |
8541b827 | 911 | } |
a59ec1e7 MH |
912 | } |
913 | ||
914 | ret = adp8870_bl_setup(bl); | |
915 | if (ret) { | |
916 | ret = -EIO; | |
917 | goto out; | |
918 | } | |
919 | ||
920 | backlight_update_status(bl); | |
921 | ||
922 | dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); | |
923 | ||
924 | if (pdata->num_leds) | |
925 | adp8870_led_probe(client); | |
926 | ||
927 | return 0; | |
928 | ||
929 | out: | |
930 | if (data->pdata->en_ambl_sens) | |
931 | sysfs_remove_group(&data->bl->dev.kobj, | |
932 | &adp8870_bl_attr_group); | |
a59ec1e7 MH |
933 | |
934 | return ret; | |
935 | } | |
936 | ||
7e4b9d0b | 937 | static int adp8870_remove(struct i2c_client *client) |
a59ec1e7 MH |
938 | { |
939 | struct adp8870_bl *data = i2c_get_clientdata(client); | |
940 | ||
941 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); | |
942 | ||
943 | if (data->led) | |
944 | adp8870_led_remove(client); | |
945 | ||
946 | if (data->pdata->en_ambl_sens) | |
947 | sysfs_remove_group(&data->bl->dev.kobj, | |
948 | &adp8870_bl_attr_group); | |
949 | ||
a59ec1e7 MH |
950 | return 0; |
951 | } | |
952 | ||
3cd4291a JH |
953 | #ifdef CONFIG_PM_SLEEP |
954 | static int adp8870_i2c_suspend(struct device *dev) | |
a59ec1e7 | 955 | { |
3cd4291a JH |
956 | struct i2c_client *client = to_i2c_client(dev); |
957 | ||
a59ec1e7 MH |
958 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
3cd4291a | 963 | static int adp8870_i2c_resume(struct device *dev) |
a59ec1e7 | 964 | { |
3cd4291a JH |
965 | struct i2c_client *client = to_i2c_client(dev); |
966 | ||
5eb02c01 | 967 | adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); |
a59ec1e7 MH |
968 | |
969 | return 0; | |
970 | } | |
a59ec1e7 MH |
971 | #endif |
972 | ||
3cd4291a JH |
973 | static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, |
974 | adp8870_i2c_resume); | |
975 | ||
a59ec1e7 MH |
976 | static const struct i2c_device_id adp8870_id[] = { |
977 | { "adp8870", 0 }, | |
978 | { } | |
979 | }; | |
980 | MODULE_DEVICE_TABLE(i2c, adp8870_id); | |
981 | ||
982 | static struct i2c_driver adp8870_driver = { | |
983 | .driver = { | |
3cd4291a JH |
984 | .name = KBUILD_MODNAME, |
985 | .pm = &adp8870_i2c_pm_ops, | |
a59ec1e7 MH |
986 | }, |
987 | .probe = adp8870_probe, | |
d1723fa2 | 988 | .remove = adp8870_remove, |
a59ec1e7 MH |
989 | .id_table = adp8870_id, |
990 | }; | |
991 | ||
81ce6864 | 992 | module_i2c_driver(adp8870_driver); |
a59ec1e7 MH |
993 | |
994 | MODULE_LICENSE("GPL v2"); | |
995 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
996 | MODULE_DESCRIPTION("ADP8870 Backlight driver"); |