Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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> |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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 | |
Axel Lin | 36c3e75 | 2012-01-20 14:34:05 -0800 | [diff] [blame] | 163 | if (!ret && ((reg_val & bit_mask) != bit_mask)) { |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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 | |
Bill Pemberton | 1b9e450 | 2012-11-19 13:21:46 -0500 | [diff] [blame] | 238 | static int adp8870_led_probe(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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 | |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 247 | led = devm_kzalloc(&client->dev, pdata->num_leds * sizeof(*led), |
| 248 | GFP_KERNEL); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 256 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 257 | |
| 258 | ret = adp8870_write(client, ADP8870_ISCT1, |
| 259 | (pdata->led_on_time & 0x3) << 6); |
| 260 | if (ret) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 261 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 262 | |
| 263 | ret = adp8870_write(client, ADP8870_ISCF, |
| 264 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); |
| 265 | if (ret) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 266 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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); |
Wei Yongjun | 514f920 | 2013-04-29 16:17:54 -0700 | [diff] [blame^] | 277 | ret = -EINVAL; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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); |
Wei Yongjun | 514f920 | 2013-04-29 16:17:54 -0700 | [diff] [blame^] | 284 | ret = -EBUSY; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 322 | return ret; |
| 323 | } |
| 324 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 325 | static int adp8870_led_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 326 | { |
| 327 | struct adp8870_backlight_platform_data *pdata = |
| 328 | client->dev.platform_data; |
| 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 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 337 | return 0; |
| 338 | } |
| 339 | #else |
Bill Pemberton | 1b9e450 | 2012-11-19 13:21:46 -0500 | [diff] [blame] | 340 | static int adp8870_led_probe(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 341 | { |
| 342 | return 0; |
| 343 | } |
| 344 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 345 | static int adp8870_led_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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; |
| 404 | if (bl->props.power != FB_BLANK_UNBLANK) |
| 405 | brightness = 0; |
| 406 | |
| 407 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) |
| 408 | brightness = 0; |
| 409 | |
| 410 | return adp8870_bl_set(bl, brightness); |
| 411 | } |
| 412 | |
| 413 | static int adp8870_bl_get_brightness(struct backlight_device *bl) |
| 414 | { |
| 415 | struct adp8870_bl *data = bl_get_data(bl); |
| 416 | |
| 417 | return data->current_brightness; |
| 418 | } |
| 419 | |
| 420 | static const struct backlight_ops adp8870_bl_ops = { |
| 421 | .update_status = adp8870_bl_update_status, |
| 422 | .get_brightness = adp8870_bl_get_brightness, |
| 423 | }; |
| 424 | |
| 425 | static int adp8870_bl_setup(struct backlight_device *bl) |
| 426 | { |
| 427 | struct adp8870_bl *data = bl_get_data(bl); |
| 428 | struct i2c_client *client = data->client; |
| 429 | struct adp8870_backlight_platform_data *pdata = data->pdata; |
| 430 | int ret = 0; |
| 431 | |
| 432 | ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); |
| 433 | if (ret) |
| 434 | return ret; |
| 435 | |
| 436 | ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); |
| 437 | if (ret) |
| 438 | return ret; |
| 439 | |
| 440 | ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); |
| 441 | if (ret) |
| 442 | return ret; |
| 443 | |
| 444 | ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); |
| 445 | if (ret) |
| 446 | return ret; |
| 447 | |
| 448 | if (pdata->en_ambl_sens) { |
| 449 | data->cached_daylight_max = pdata->l1_daylight_max; |
| 450 | ret = adp8870_write(client, ADP8870_BLMX2, |
| 451 | pdata->l2_bright_max); |
| 452 | if (ret) |
| 453 | return ret; |
| 454 | ret = adp8870_write(client, ADP8870_BLDM2, |
| 455 | pdata->l2_bright_dim); |
| 456 | if (ret) |
| 457 | return ret; |
| 458 | |
| 459 | ret = adp8870_write(client, ADP8870_BLMX3, |
| 460 | pdata->l3_office_max); |
| 461 | if (ret) |
| 462 | return ret; |
| 463 | ret = adp8870_write(client, ADP8870_BLDM3, |
| 464 | pdata->l3_office_dim); |
| 465 | if (ret) |
| 466 | return ret; |
| 467 | |
| 468 | ret = adp8870_write(client, ADP8870_BLMX4, |
| 469 | pdata->l4_indoor_max); |
| 470 | if (ret) |
| 471 | return ret; |
| 472 | |
| 473 | ret = adp8870_write(client, ADP8870_BLDM4, |
| 474 | pdata->l4_indor_dim); |
| 475 | if (ret) |
| 476 | return ret; |
| 477 | |
| 478 | ret = adp8870_write(client, ADP8870_BLMX5, |
| 479 | pdata->l5_dark_max); |
| 480 | if (ret) |
| 481 | return ret; |
| 482 | |
| 483 | ret = adp8870_write(client, ADP8870_BLDM5, |
| 484 | pdata->l5_dark_dim); |
| 485 | if (ret) |
| 486 | return ret; |
| 487 | |
| 488 | ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); |
| 489 | if (ret) |
| 490 | return ret; |
| 491 | |
| 492 | ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); |
| 493 | if (ret) |
| 494 | return ret; |
| 495 | |
| 496 | ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); |
| 497 | if (ret) |
| 498 | return ret; |
| 499 | |
| 500 | ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); |
| 501 | if (ret) |
| 502 | return ret; |
| 503 | |
| 504 | ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); |
| 505 | if (ret) |
| 506 | return ret; |
| 507 | |
| 508 | ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); |
| 509 | if (ret) |
| 510 | return ret; |
| 511 | |
| 512 | ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); |
| 513 | if (ret) |
| 514 | return ret; |
| 515 | |
| 516 | ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); |
| 517 | if (ret) |
| 518 | return ret; |
| 519 | |
| 520 | ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | |
| 521 | L3_EN | L2_EN); |
| 522 | if (ret) |
| 523 | return ret; |
| 524 | |
| 525 | ret = adp8870_write(client, ADP8870_CMP_CTL, |
| 526 | ALS_CMPR_CFG_VAL(pdata->abml_filt)); |
| 527 | if (ret) |
| 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | ret = adp8870_write(client, ADP8870_CFGR, |
| 532 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); |
| 533 | if (ret) |
| 534 | return ret; |
| 535 | |
| 536 | ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, |
| 537 | pdata->bl_fade_out)); |
| 538 | if (ret) |
| 539 | return ret; |
| 540 | /* |
| 541 | * ADP8870 Rev0 requires GDWN_DIS bit set |
| 542 | */ |
| 543 | |
| 544 | ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | |
| 545 | (data->revid == 0 ? GDWN_DIS : 0)); |
| 546 | |
| 547 | return ret; |
| 548 | } |
| 549 | |
| 550 | static ssize_t adp8870_show(struct device *dev, char *buf, int reg) |
| 551 | { |
| 552 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 553 | int error; |
| 554 | uint8_t reg_val; |
| 555 | |
| 556 | mutex_lock(&data->lock); |
| 557 | error = adp8870_read(data->client, reg, ®_val); |
| 558 | mutex_unlock(&data->lock); |
| 559 | |
| 560 | if (error < 0) |
| 561 | return error; |
| 562 | |
| 563 | return sprintf(buf, "%u\n", reg_val); |
| 564 | } |
| 565 | |
| 566 | static ssize_t adp8870_store(struct device *dev, const char *buf, |
| 567 | size_t count, int reg) |
| 568 | { |
| 569 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 570 | unsigned long val; |
| 571 | int ret; |
| 572 | |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 573 | ret = kstrtoul(buf, 10, &val); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 574 | if (ret) |
| 575 | return ret; |
| 576 | |
| 577 | mutex_lock(&data->lock); |
| 578 | adp8870_write(data->client, reg, val); |
| 579 | mutex_unlock(&data->lock); |
| 580 | |
| 581 | return count; |
| 582 | } |
| 583 | |
| 584 | static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, |
| 585 | struct device_attribute *attr, char *buf) |
| 586 | { |
| 587 | return adp8870_show(dev, buf, ADP8870_BLMX5); |
| 588 | } |
| 589 | |
| 590 | static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, |
| 591 | struct device_attribute *attr, const char *buf, size_t count) |
| 592 | { |
| 593 | return adp8870_store(dev, buf, count, ADP8870_BLMX5); |
| 594 | } |
| 595 | static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, |
| 596 | adp8870_bl_l5_dark_max_store); |
| 597 | |
| 598 | |
| 599 | static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, |
| 600 | struct device_attribute *attr, char *buf) |
| 601 | { |
| 602 | return adp8870_show(dev, buf, ADP8870_BLMX4); |
| 603 | } |
| 604 | |
| 605 | static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, |
| 606 | struct device_attribute *attr, const char *buf, size_t count) |
| 607 | { |
| 608 | return adp8870_store(dev, buf, count, ADP8870_BLMX4); |
| 609 | } |
| 610 | static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, |
| 611 | adp8870_bl_l4_indoor_max_store); |
| 612 | |
| 613 | |
| 614 | static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, |
| 615 | struct device_attribute *attr, char *buf) |
| 616 | { |
| 617 | return adp8870_show(dev, buf, ADP8870_BLMX3); |
| 618 | } |
| 619 | |
| 620 | static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, |
| 621 | struct device_attribute *attr, const char *buf, size_t count) |
| 622 | { |
| 623 | return adp8870_store(dev, buf, count, ADP8870_BLMX3); |
| 624 | } |
| 625 | |
| 626 | static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, |
| 627 | adp8870_bl_l3_office_max_store); |
| 628 | |
| 629 | static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, |
| 630 | struct device_attribute *attr, char *buf) |
| 631 | { |
| 632 | return adp8870_show(dev, buf, ADP8870_BLMX2); |
| 633 | } |
| 634 | |
| 635 | static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, |
| 636 | struct device_attribute *attr, const char *buf, size_t count) |
| 637 | { |
| 638 | return adp8870_store(dev, buf, count, ADP8870_BLMX2); |
| 639 | } |
| 640 | static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, |
| 641 | adp8870_bl_l2_bright_max_store); |
| 642 | |
| 643 | static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, |
| 644 | struct device_attribute *attr, char *buf) |
| 645 | { |
| 646 | return adp8870_show(dev, buf, ADP8870_BLMX1); |
| 647 | } |
| 648 | |
| 649 | static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, |
| 650 | struct device_attribute *attr, const char *buf, size_t count) |
| 651 | { |
| 652 | struct adp8870_bl *data = dev_get_drvdata(dev); |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 653 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 654 | if (ret) |
| 655 | return ret; |
| 656 | |
| 657 | return adp8870_store(dev, buf, count, ADP8870_BLMX1); |
| 658 | } |
| 659 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, |
| 660 | adp8870_bl_l1_daylight_max_store); |
| 661 | |
| 662 | static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, |
| 663 | struct device_attribute *attr, char *buf) |
| 664 | { |
| 665 | return adp8870_show(dev, buf, ADP8870_BLDM5); |
| 666 | } |
| 667 | |
| 668 | static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, |
| 669 | struct device_attribute *attr, |
| 670 | const char *buf, size_t count) |
| 671 | { |
| 672 | return adp8870_store(dev, buf, count, ADP8870_BLDM5); |
| 673 | } |
| 674 | static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, |
| 675 | adp8870_bl_l5_dark_dim_store); |
| 676 | |
| 677 | static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, |
| 678 | struct device_attribute *attr, char *buf) |
| 679 | { |
| 680 | return adp8870_show(dev, buf, ADP8870_BLDM4); |
| 681 | } |
| 682 | |
| 683 | static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, |
| 684 | struct device_attribute *attr, |
| 685 | const char *buf, size_t count) |
| 686 | { |
| 687 | return adp8870_store(dev, buf, count, ADP8870_BLDM4); |
| 688 | } |
| 689 | static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, |
| 690 | adp8870_bl_l4_indoor_dim_store); |
| 691 | |
| 692 | |
| 693 | static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, |
| 694 | struct device_attribute *attr, char *buf) |
| 695 | { |
| 696 | return adp8870_show(dev, buf, ADP8870_BLDM3); |
| 697 | } |
| 698 | |
| 699 | static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, |
| 700 | struct device_attribute *attr, |
| 701 | const char *buf, size_t count) |
| 702 | { |
| 703 | return adp8870_store(dev, buf, count, ADP8870_BLDM3); |
| 704 | } |
| 705 | static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, |
| 706 | adp8870_bl_l3_office_dim_store); |
| 707 | |
| 708 | static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, |
| 709 | struct device_attribute *attr, char *buf) |
| 710 | { |
| 711 | return adp8870_show(dev, buf, ADP8870_BLDM2); |
| 712 | } |
| 713 | |
| 714 | static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, |
| 715 | struct device_attribute *attr, |
| 716 | const char *buf, size_t count) |
| 717 | { |
| 718 | return adp8870_store(dev, buf, count, ADP8870_BLDM2); |
| 719 | } |
| 720 | static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, |
| 721 | adp8870_bl_l2_bright_dim_store); |
| 722 | |
| 723 | static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, |
| 724 | struct device_attribute *attr, char *buf) |
| 725 | { |
| 726 | return adp8870_show(dev, buf, ADP8870_BLDM1); |
| 727 | } |
| 728 | |
| 729 | static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, |
| 730 | struct device_attribute *attr, |
| 731 | const char *buf, size_t count) |
| 732 | { |
| 733 | return adp8870_store(dev, buf, count, ADP8870_BLDM1); |
| 734 | } |
| 735 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, |
| 736 | adp8870_bl_l1_daylight_dim_store); |
| 737 | |
| 738 | #ifdef ADP8870_EXT_FEATURES |
| 739 | static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, |
| 740 | struct device_attribute *attr, char *buf) |
| 741 | { |
| 742 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 743 | int error; |
| 744 | uint8_t reg_val; |
| 745 | uint16_t ret_val; |
| 746 | |
| 747 | mutex_lock(&data->lock); |
| 748 | error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); |
| 749 | if (error < 0) { |
| 750 | mutex_unlock(&data->lock); |
| 751 | return error; |
| 752 | } |
| 753 | ret_val = reg_val; |
| 754 | error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); |
| 755 | mutex_unlock(&data->lock); |
| 756 | |
| 757 | if (error < 0) |
| 758 | return error; |
| 759 | |
| 760 | /* Return 13-bit conversion value for the first light sensor */ |
| 761 | ret_val += (reg_val & 0x1F) << 8; |
| 762 | |
| 763 | return sprintf(buf, "%u\n", ret_val); |
| 764 | } |
| 765 | static DEVICE_ATTR(ambient_light_level, 0444, |
| 766 | adp8870_bl_ambient_light_level_show, NULL); |
| 767 | |
| 768 | static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, |
| 769 | struct device_attribute *attr, char *buf) |
| 770 | { |
| 771 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 772 | int error; |
| 773 | uint8_t reg_val; |
| 774 | |
| 775 | mutex_lock(&data->lock); |
| 776 | error = adp8870_read(data->client, ADP8870_CFGR, ®_val); |
| 777 | mutex_unlock(&data->lock); |
| 778 | |
| 779 | if (error < 0) |
| 780 | return error; |
| 781 | |
| 782 | return sprintf(buf, "%u\n", |
| 783 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); |
| 784 | } |
| 785 | |
| 786 | static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, |
| 787 | struct device_attribute *attr, |
| 788 | const char *buf, size_t count) |
| 789 | { |
| 790 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 791 | unsigned long val; |
| 792 | uint8_t reg_val; |
| 793 | int ret; |
| 794 | |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 795 | ret = kstrtoul(buf, 10, &val); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 796 | if (ret) |
| 797 | return ret; |
| 798 | |
| 799 | if (val == 0) { |
| 800 | /* Enable automatic ambient light sensing */ |
| 801 | adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); |
| 802 | } else if ((val > 0) && (val < 6)) { |
| 803 | /* Disable automatic ambient light sensing */ |
| 804 | adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); |
| 805 | |
| 806 | /* Set user supplied ambient light zone */ |
| 807 | mutex_lock(&data->lock); |
| 808 | adp8870_read(data->client, ADP8870_CFGR, ®_val); |
| 809 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); |
| 810 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; |
| 811 | adp8870_write(data->client, ADP8870_CFGR, reg_val); |
| 812 | mutex_unlock(&data->lock); |
| 813 | } |
| 814 | |
| 815 | return count; |
| 816 | } |
| 817 | static DEVICE_ATTR(ambient_light_zone, 0664, |
| 818 | adp8870_bl_ambient_light_zone_show, |
| 819 | adp8870_bl_ambient_light_zone_store); |
| 820 | #endif |
| 821 | |
| 822 | static struct attribute *adp8870_bl_attributes[] = { |
| 823 | &dev_attr_l5_dark_max.attr, |
| 824 | &dev_attr_l5_dark_dim.attr, |
| 825 | &dev_attr_l4_indoor_max.attr, |
| 826 | &dev_attr_l4_indoor_dim.attr, |
| 827 | &dev_attr_l3_office_max.attr, |
| 828 | &dev_attr_l3_office_dim.attr, |
| 829 | &dev_attr_l2_bright_max.attr, |
| 830 | &dev_attr_l2_bright_dim.attr, |
| 831 | &dev_attr_l1_daylight_max.attr, |
| 832 | &dev_attr_l1_daylight_dim.attr, |
| 833 | #ifdef ADP8870_EXT_FEATURES |
| 834 | &dev_attr_ambient_light_level.attr, |
| 835 | &dev_attr_ambient_light_zone.attr, |
| 836 | #endif |
| 837 | NULL |
| 838 | }; |
| 839 | |
| 840 | static const struct attribute_group adp8870_bl_attr_group = { |
| 841 | .attrs = adp8870_bl_attributes, |
| 842 | }; |
| 843 | |
Bill Pemberton | 1b9e450 | 2012-11-19 13:21:46 -0500 | [diff] [blame] | 844 | static int adp8870_probe(struct i2c_client *client, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 845 | const struct i2c_device_id *id) |
| 846 | { |
| 847 | struct backlight_properties props; |
| 848 | struct backlight_device *bl; |
| 849 | struct adp8870_bl *data; |
| 850 | struct adp8870_backlight_platform_data *pdata = |
| 851 | client->dev.platform_data; |
| 852 | uint8_t reg_val; |
| 853 | int ret; |
| 854 | |
| 855 | if (!i2c_check_functionality(client->adapter, |
| 856 | I2C_FUNC_SMBUS_BYTE_DATA)) { |
| 857 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); |
| 858 | return -EIO; |
| 859 | } |
| 860 | |
| 861 | if (!pdata) { |
| 862 | dev_err(&client->dev, "no platform data?\n"); |
| 863 | return -EINVAL; |
| 864 | } |
| 865 | |
| 866 | ret = adp8870_read(client, ADP8870_MFDVID, ®_val); |
| 867 | if (ret < 0) |
| 868 | return -EIO; |
| 869 | |
| 870 | if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { |
| 871 | dev_err(&client->dev, "failed to probe\n"); |
| 872 | return -ENODEV; |
| 873 | } |
| 874 | |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 875 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 876 | if (data == NULL) |
| 877 | return -ENOMEM; |
| 878 | |
| 879 | data->revid = ADP8870_DEVID(reg_val); |
| 880 | data->client = client; |
| 881 | data->pdata = pdata; |
| 882 | data->id = id->driver_data; |
| 883 | data->current_brightness = 0; |
| 884 | i2c_set_clientdata(client, data); |
| 885 | |
| 886 | mutex_init(&data->lock); |
| 887 | |
| 888 | memset(&props, 0, sizeof(props)); |
Andrew Morton | e1bbd19 | 2011-06-15 15:08:12 -0700 | [diff] [blame] | 889 | props.type = BACKLIGHT_RAW; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 890 | props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; |
| 891 | bl = backlight_device_register(dev_driver_string(&client->dev), |
| 892 | &client->dev, data, &adp8870_bl_ops, &props); |
| 893 | if (IS_ERR(bl)) { |
| 894 | dev_err(&client->dev, "failed to register backlight\n"); |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 895 | return PTR_ERR(bl); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | data->bl = bl; |
| 899 | |
Jingoo Han | 8541b82 | 2013-04-29 16:17:33 -0700 | [diff] [blame] | 900 | if (pdata->en_ambl_sens) { |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 901 | ret = sysfs_create_group(&bl->dev.kobj, |
| 902 | &adp8870_bl_attr_group); |
Jingoo Han | 8541b82 | 2013-04-29 16:17:33 -0700 | [diff] [blame] | 903 | if (ret) { |
| 904 | dev_err(&client->dev, "failed to register sysfs\n"); |
| 905 | goto out1; |
| 906 | } |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | ret = adp8870_bl_setup(bl); |
| 910 | if (ret) { |
| 911 | ret = -EIO; |
| 912 | goto out; |
| 913 | } |
| 914 | |
| 915 | backlight_update_status(bl); |
| 916 | |
| 917 | dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); |
| 918 | |
| 919 | if (pdata->num_leds) |
| 920 | adp8870_led_probe(client); |
| 921 | |
| 922 | return 0; |
| 923 | |
| 924 | out: |
| 925 | if (data->pdata->en_ambl_sens) |
| 926 | sysfs_remove_group(&data->bl->dev.kobj, |
| 927 | &adp8870_bl_attr_group); |
| 928 | out1: |
| 929 | backlight_device_unregister(bl); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 930 | |
| 931 | return ret; |
| 932 | } |
| 933 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 934 | static int adp8870_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 935 | { |
| 936 | struct adp8870_bl *data = i2c_get_clientdata(client); |
| 937 | |
| 938 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
| 939 | |
| 940 | if (data->led) |
| 941 | adp8870_led_remove(client); |
| 942 | |
| 943 | if (data->pdata->en_ambl_sens) |
| 944 | sysfs_remove_group(&data->bl->dev.kobj, |
| 945 | &adp8870_bl_attr_group); |
| 946 | |
| 947 | backlight_device_unregister(data->bl); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 948 | |
| 949 | return 0; |
| 950 | } |
| 951 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 952 | #ifdef CONFIG_PM_SLEEP |
| 953 | static int adp8870_i2c_suspend(struct device *dev) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 954 | { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 955 | struct i2c_client *client = to_i2c_client(dev); |
| 956 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 957 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
| 958 | |
| 959 | return 0; |
| 960 | } |
| 961 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 962 | static int adp8870_i2c_resume(struct device *dev) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 963 | { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 964 | struct i2c_client *client = to_i2c_client(dev); |
| 965 | |
Lars-Peter Clausen | 5eb02c0 | 2013-02-21 16:44:04 -0800 | [diff] [blame] | 966 | adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 967 | |
| 968 | return 0; |
| 969 | } |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 970 | #endif |
| 971 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 972 | static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, |
| 973 | adp8870_i2c_resume); |
| 974 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 975 | static const struct i2c_device_id adp8870_id[] = { |
| 976 | { "adp8870", 0 }, |
| 977 | { } |
| 978 | }; |
| 979 | MODULE_DEVICE_TABLE(i2c, adp8870_id); |
| 980 | |
| 981 | static struct i2c_driver adp8870_driver = { |
| 982 | .driver = { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 983 | .name = KBUILD_MODNAME, |
| 984 | .pm = &adp8870_i2c_pm_ops, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 985 | }, |
| 986 | .probe = adp8870_probe, |
Bill Pemberton | d1723fa | 2012-11-19 13:21:09 -0500 | [diff] [blame] | 987 | .remove = adp8870_remove, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 988 | .id_table = adp8870_id, |
| 989 | }; |
| 990 | |
Axel Lin | 81ce686 | 2012-03-23 15:01:59 -0700 | [diff] [blame] | 991 | module_i2c_driver(adp8870_driver); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 992 | |
| 993 | MODULE_LICENSE("GPL v2"); |
| 994 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 995 | MODULE_DESCRIPTION("ADP8870 Backlight driver"); |
Axel Lin | c53252b | 2011-08-25 15:59:18 -0700 | [diff] [blame] | 996 | MODULE_ALIAS("i2c:adp8870-backlight"); |