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 = |
Jingoo Han | c512794c | 2013-11-12 15:09:04 -0800 | [diff] [blame] | 241 | dev_get_platdata(&client->dev); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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); |
Jingoo Han | 0167a95 | 2014-04-03 14:48:58 -0700 | [diff] [blame] | 249 | if (led == NULL) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 250 | return -ENOMEM; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 251 | |
| 252 | ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law); |
| 253 | if (ret) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 254 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 255 | |
| 256 | ret = adp8870_write(client, ADP8870_ISCT1, |
| 257 | (pdata->led_on_time & 0x3) << 6); |
| 258 | if (ret) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 259 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 260 | |
| 261 | ret = adp8870_write(client, ADP8870_ISCF, |
| 262 | FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); |
| 263 | if (ret) |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 264 | return ret; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 265 | |
| 266 | for (i = 0; i < pdata->num_leds; ++i) { |
| 267 | cur_led = &pdata->leds[i]; |
| 268 | led_dat = &led[i]; |
| 269 | |
| 270 | led_dat->id = cur_led->flags & ADP8870_FLAG_LED_MASK; |
| 271 | |
| 272 | if (led_dat->id > 7 || led_dat->id < 1) { |
| 273 | dev_err(&client->dev, "Invalid LED ID %d\n", |
| 274 | led_dat->id); |
Wei Yongjun | 514f920 | 2013-04-29 16:17:54 -0700 | [diff] [blame] | 275 | ret = -EINVAL; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 276 | goto err; |
| 277 | } |
| 278 | |
| 279 | if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { |
| 280 | dev_err(&client->dev, "LED %d used by Backlight\n", |
| 281 | led_dat->id); |
Wei Yongjun | 514f920 | 2013-04-29 16:17:54 -0700 | [diff] [blame] | 282 | ret = -EBUSY; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 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 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 320 | return ret; |
| 321 | } |
| 322 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 323 | static int adp8870_led_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 324 | { |
| 325 | struct adp8870_backlight_platform_data *pdata = |
Jingoo Han | c512794c | 2013-11-12 15:09:04 -0800 | [diff] [blame] | 326 | dev_get_platdata(&client->dev); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 327 | struct adp8870_bl *data = i2c_get_clientdata(client); |
| 328 | int i; |
| 329 | |
| 330 | for (i = 0; i < pdata->num_leds; i++) { |
| 331 | led_classdev_unregister(&data->led[i].cdev); |
| 332 | cancel_work_sync(&data->led[i].work); |
| 333 | } |
| 334 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 335 | return 0; |
| 336 | } |
| 337 | #else |
Bill Pemberton | 1b9e450 | 2012-11-19 13:21:46 -0500 | [diff] [blame] | 338 | static int adp8870_led_probe(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 339 | { |
| 340 | return 0; |
| 341 | } |
| 342 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 343 | static int adp8870_led_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 344 | { |
| 345 | return 0; |
| 346 | } |
| 347 | #endif |
| 348 | |
| 349 | static int adp8870_bl_set(struct backlight_device *bl, int brightness) |
| 350 | { |
| 351 | struct adp8870_bl *data = bl_get_data(bl); |
| 352 | struct i2c_client *client = data->client; |
| 353 | int ret = 0; |
| 354 | |
| 355 | if (data->pdata->en_ambl_sens) { |
| 356 | if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) { |
| 357 | /* Disable Ambient Light auto adjust */ |
| 358 | ret = adp8870_clr_bits(client, ADP8870_MDCR, |
| 359 | CMP_AUTOEN); |
| 360 | if (ret) |
| 361 | return ret; |
| 362 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); |
| 363 | if (ret) |
| 364 | return ret; |
| 365 | } else { |
| 366 | /* |
| 367 | * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust |
| 368 | * restore daylight l1 sysfs brightness |
| 369 | */ |
| 370 | ret = adp8870_write(client, ADP8870_BLMX1, |
| 371 | data->cached_daylight_max); |
| 372 | if (ret) |
| 373 | return ret; |
| 374 | |
| 375 | ret = adp8870_set_bits(client, ADP8870_MDCR, |
| 376 | CMP_AUTOEN); |
| 377 | if (ret) |
| 378 | return ret; |
| 379 | } |
| 380 | } else { |
| 381 | ret = adp8870_write(client, ADP8870_BLMX1, brightness); |
| 382 | if (ret) |
| 383 | return ret; |
| 384 | } |
| 385 | |
| 386 | if (data->current_brightness && brightness == 0) |
| 387 | ret = adp8870_set_bits(client, |
| 388 | ADP8870_MDCR, DIM_EN); |
| 389 | else if (data->current_brightness == 0 && brightness) |
| 390 | ret = adp8870_clr_bits(client, |
| 391 | ADP8870_MDCR, DIM_EN); |
| 392 | |
| 393 | if (!ret) |
| 394 | data->current_brightness = brightness; |
| 395 | |
| 396 | return ret; |
| 397 | } |
| 398 | |
| 399 | static int adp8870_bl_update_status(struct backlight_device *bl) |
| 400 | { |
| 401 | int brightness = bl->props.brightness; |
| 402 | if (bl->props.power != FB_BLANK_UNBLANK) |
| 403 | brightness = 0; |
| 404 | |
| 405 | if (bl->props.fb_blank != FB_BLANK_UNBLANK) |
| 406 | brightness = 0; |
| 407 | |
| 408 | return adp8870_bl_set(bl, brightness); |
| 409 | } |
| 410 | |
| 411 | static int adp8870_bl_get_brightness(struct backlight_device *bl) |
| 412 | { |
| 413 | struct adp8870_bl *data = bl_get_data(bl); |
| 414 | |
| 415 | return data->current_brightness; |
| 416 | } |
| 417 | |
| 418 | static const struct backlight_ops adp8870_bl_ops = { |
| 419 | .update_status = adp8870_bl_update_status, |
| 420 | .get_brightness = adp8870_bl_get_brightness, |
| 421 | }; |
| 422 | |
| 423 | static int adp8870_bl_setup(struct backlight_device *bl) |
| 424 | { |
| 425 | struct adp8870_bl *data = bl_get_data(bl); |
| 426 | struct i2c_client *client = data->client; |
| 427 | struct adp8870_backlight_platform_data *pdata = data->pdata; |
| 428 | int ret = 0; |
| 429 | |
| 430 | ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign); |
| 431 | if (ret) |
| 432 | return ret; |
| 433 | |
| 434 | ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign); |
| 435 | if (ret) |
| 436 | return ret; |
| 437 | |
| 438 | ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max); |
| 439 | if (ret) |
| 440 | return ret; |
| 441 | |
| 442 | ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim); |
| 443 | if (ret) |
| 444 | return ret; |
| 445 | |
| 446 | if (pdata->en_ambl_sens) { |
| 447 | data->cached_daylight_max = pdata->l1_daylight_max; |
| 448 | ret = adp8870_write(client, ADP8870_BLMX2, |
| 449 | pdata->l2_bright_max); |
| 450 | if (ret) |
| 451 | return ret; |
| 452 | ret = adp8870_write(client, ADP8870_BLDM2, |
| 453 | pdata->l2_bright_dim); |
| 454 | if (ret) |
| 455 | return ret; |
| 456 | |
| 457 | ret = adp8870_write(client, ADP8870_BLMX3, |
| 458 | pdata->l3_office_max); |
| 459 | if (ret) |
| 460 | return ret; |
| 461 | ret = adp8870_write(client, ADP8870_BLDM3, |
| 462 | pdata->l3_office_dim); |
| 463 | if (ret) |
| 464 | return ret; |
| 465 | |
| 466 | ret = adp8870_write(client, ADP8870_BLMX4, |
| 467 | pdata->l4_indoor_max); |
| 468 | if (ret) |
| 469 | return ret; |
| 470 | |
| 471 | ret = adp8870_write(client, ADP8870_BLDM4, |
| 472 | pdata->l4_indor_dim); |
| 473 | if (ret) |
| 474 | return ret; |
| 475 | |
| 476 | ret = adp8870_write(client, ADP8870_BLMX5, |
| 477 | pdata->l5_dark_max); |
| 478 | if (ret) |
| 479 | return ret; |
| 480 | |
| 481 | ret = adp8870_write(client, ADP8870_BLDM5, |
| 482 | pdata->l5_dark_dim); |
| 483 | if (ret) |
| 484 | return ret; |
| 485 | |
| 486 | ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip); |
| 487 | if (ret) |
| 488 | return ret; |
| 489 | |
| 490 | ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst); |
| 491 | if (ret) |
| 492 | return ret; |
| 493 | |
| 494 | ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip); |
| 495 | if (ret) |
| 496 | return ret; |
| 497 | |
| 498 | ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst); |
| 499 | if (ret) |
| 500 | return ret; |
| 501 | |
| 502 | ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip); |
| 503 | if (ret) |
| 504 | return ret; |
| 505 | |
| 506 | ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst); |
| 507 | if (ret) |
| 508 | return ret; |
| 509 | |
| 510 | ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip); |
| 511 | if (ret) |
| 512 | return ret; |
| 513 | |
| 514 | ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst); |
| 515 | if (ret) |
| 516 | return ret; |
| 517 | |
| 518 | ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN | |
| 519 | L3_EN | L2_EN); |
| 520 | if (ret) |
| 521 | return ret; |
| 522 | |
| 523 | ret = adp8870_write(client, ADP8870_CMP_CTL, |
| 524 | ALS_CMPR_CFG_VAL(pdata->abml_filt)); |
| 525 | if (ret) |
| 526 | return ret; |
| 527 | } |
| 528 | |
| 529 | ret = adp8870_write(client, ADP8870_CFGR, |
| 530 | BL_CFGR_VAL(pdata->bl_fade_law, 0)); |
| 531 | if (ret) |
| 532 | return ret; |
| 533 | |
| 534 | ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in, |
| 535 | pdata->bl_fade_out)); |
| 536 | if (ret) |
| 537 | return ret; |
| 538 | /* |
| 539 | * ADP8870 Rev0 requires GDWN_DIS bit set |
| 540 | */ |
| 541 | |
| 542 | ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY | |
| 543 | (data->revid == 0 ? GDWN_DIS : 0)); |
| 544 | |
| 545 | return ret; |
| 546 | } |
| 547 | |
| 548 | static ssize_t adp8870_show(struct device *dev, char *buf, int reg) |
| 549 | { |
| 550 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 551 | int error; |
| 552 | uint8_t reg_val; |
| 553 | |
| 554 | mutex_lock(&data->lock); |
| 555 | error = adp8870_read(data->client, reg, ®_val); |
| 556 | mutex_unlock(&data->lock); |
| 557 | |
| 558 | if (error < 0) |
| 559 | return error; |
| 560 | |
| 561 | return sprintf(buf, "%u\n", reg_val); |
| 562 | } |
| 563 | |
| 564 | static ssize_t adp8870_store(struct device *dev, const char *buf, |
| 565 | size_t count, int reg) |
| 566 | { |
| 567 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 568 | unsigned long val; |
| 569 | int ret; |
| 570 | |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 571 | ret = kstrtoul(buf, 10, &val); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 572 | if (ret) |
| 573 | return ret; |
| 574 | |
| 575 | mutex_lock(&data->lock); |
| 576 | adp8870_write(data->client, reg, val); |
| 577 | mutex_unlock(&data->lock); |
| 578 | |
| 579 | return count; |
| 580 | } |
| 581 | |
| 582 | static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev, |
| 583 | struct device_attribute *attr, char *buf) |
| 584 | { |
| 585 | return adp8870_show(dev, buf, ADP8870_BLMX5); |
| 586 | } |
| 587 | |
| 588 | static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev, |
| 589 | struct device_attribute *attr, const char *buf, size_t count) |
| 590 | { |
| 591 | return adp8870_store(dev, buf, count, ADP8870_BLMX5); |
| 592 | } |
| 593 | static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show, |
| 594 | adp8870_bl_l5_dark_max_store); |
| 595 | |
| 596 | |
| 597 | static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev, |
| 598 | struct device_attribute *attr, char *buf) |
| 599 | { |
| 600 | return adp8870_show(dev, buf, ADP8870_BLMX4); |
| 601 | } |
| 602 | |
| 603 | static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev, |
| 604 | struct device_attribute *attr, const char *buf, size_t count) |
| 605 | { |
| 606 | return adp8870_store(dev, buf, count, ADP8870_BLMX4); |
| 607 | } |
| 608 | static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show, |
| 609 | adp8870_bl_l4_indoor_max_store); |
| 610 | |
| 611 | |
| 612 | static ssize_t adp8870_bl_l3_office_max_show(struct device *dev, |
| 613 | struct device_attribute *attr, char *buf) |
| 614 | { |
| 615 | return adp8870_show(dev, buf, ADP8870_BLMX3); |
| 616 | } |
| 617 | |
| 618 | static ssize_t adp8870_bl_l3_office_max_store(struct device *dev, |
| 619 | struct device_attribute *attr, const char *buf, size_t count) |
| 620 | { |
| 621 | return adp8870_store(dev, buf, count, ADP8870_BLMX3); |
| 622 | } |
| 623 | |
| 624 | static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show, |
| 625 | adp8870_bl_l3_office_max_store); |
| 626 | |
| 627 | static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev, |
| 628 | struct device_attribute *attr, char *buf) |
| 629 | { |
| 630 | return adp8870_show(dev, buf, ADP8870_BLMX2); |
| 631 | } |
| 632 | |
| 633 | static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev, |
| 634 | struct device_attribute *attr, const char *buf, size_t count) |
| 635 | { |
| 636 | return adp8870_store(dev, buf, count, ADP8870_BLMX2); |
| 637 | } |
| 638 | static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show, |
| 639 | adp8870_bl_l2_bright_max_store); |
| 640 | |
| 641 | static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev, |
| 642 | struct device_attribute *attr, char *buf) |
| 643 | { |
| 644 | return adp8870_show(dev, buf, ADP8870_BLMX1); |
| 645 | } |
| 646 | |
| 647 | static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev, |
| 648 | struct device_attribute *attr, const char *buf, size_t count) |
| 649 | { |
| 650 | struct adp8870_bl *data = dev_get_drvdata(dev); |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 651 | int ret = kstrtoul(buf, 10, &data->cached_daylight_max); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 652 | if (ret) |
| 653 | return ret; |
| 654 | |
| 655 | return adp8870_store(dev, buf, count, ADP8870_BLMX1); |
| 656 | } |
| 657 | static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show, |
| 658 | adp8870_bl_l1_daylight_max_store); |
| 659 | |
| 660 | static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev, |
| 661 | struct device_attribute *attr, char *buf) |
| 662 | { |
| 663 | return adp8870_show(dev, buf, ADP8870_BLDM5); |
| 664 | } |
| 665 | |
| 666 | static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev, |
| 667 | struct device_attribute *attr, |
| 668 | const char *buf, size_t count) |
| 669 | { |
| 670 | return adp8870_store(dev, buf, count, ADP8870_BLDM5); |
| 671 | } |
| 672 | static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show, |
| 673 | adp8870_bl_l5_dark_dim_store); |
| 674 | |
| 675 | static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev, |
| 676 | struct device_attribute *attr, char *buf) |
| 677 | { |
| 678 | return adp8870_show(dev, buf, ADP8870_BLDM4); |
| 679 | } |
| 680 | |
| 681 | static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev, |
| 682 | struct device_attribute *attr, |
| 683 | const char *buf, size_t count) |
| 684 | { |
| 685 | return adp8870_store(dev, buf, count, ADP8870_BLDM4); |
| 686 | } |
| 687 | static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show, |
| 688 | adp8870_bl_l4_indoor_dim_store); |
| 689 | |
| 690 | |
| 691 | static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev, |
| 692 | struct device_attribute *attr, char *buf) |
| 693 | { |
| 694 | return adp8870_show(dev, buf, ADP8870_BLDM3); |
| 695 | } |
| 696 | |
| 697 | static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev, |
| 698 | struct device_attribute *attr, |
| 699 | const char *buf, size_t count) |
| 700 | { |
| 701 | return adp8870_store(dev, buf, count, ADP8870_BLDM3); |
| 702 | } |
| 703 | static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show, |
| 704 | adp8870_bl_l3_office_dim_store); |
| 705 | |
| 706 | static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev, |
| 707 | struct device_attribute *attr, char *buf) |
| 708 | { |
| 709 | return adp8870_show(dev, buf, ADP8870_BLDM2); |
| 710 | } |
| 711 | |
| 712 | static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev, |
| 713 | struct device_attribute *attr, |
| 714 | const char *buf, size_t count) |
| 715 | { |
| 716 | return adp8870_store(dev, buf, count, ADP8870_BLDM2); |
| 717 | } |
| 718 | static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show, |
| 719 | adp8870_bl_l2_bright_dim_store); |
| 720 | |
| 721 | static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev, |
| 722 | struct device_attribute *attr, char *buf) |
| 723 | { |
| 724 | return adp8870_show(dev, buf, ADP8870_BLDM1); |
| 725 | } |
| 726 | |
| 727 | static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev, |
| 728 | struct device_attribute *attr, |
| 729 | const char *buf, size_t count) |
| 730 | { |
| 731 | return adp8870_store(dev, buf, count, ADP8870_BLDM1); |
| 732 | } |
| 733 | static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show, |
| 734 | adp8870_bl_l1_daylight_dim_store); |
| 735 | |
| 736 | #ifdef ADP8870_EXT_FEATURES |
| 737 | static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev, |
| 738 | struct device_attribute *attr, char *buf) |
| 739 | { |
| 740 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 741 | int error; |
| 742 | uint8_t reg_val; |
| 743 | uint16_t ret_val; |
| 744 | |
| 745 | mutex_lock(&data->lock); |
| 746 | error = adp8870_read(data->client, ADP8870_PH1LEVL, ®_val); |
| 747 | if (error < 0) { |
| 748 | mutex_unlock(&data->lock); |
| 749 | return error; |
| 750 | } |
| 751 | ret_val = reg_val; |
| 752 | error = adp8870_read(data->client, ADP8870_PH1LEVH, ®_val); |
| 753 | mutex_unlock(&data->lock); |
| 754 | |
| 755 | if (error < 0) |
| 756 | return error; |
| 757 | |
| 758 | /* Return 13-bit conversion value for the first light sensor */ |
| 759 | ret_val += (reg_val & 0x1F) << 8; |
| 760 | |
| 761 | return sprintf(buf, "%u\n", ret_val); |
| 762 | } |
| 763 | static DEVICE_ATTR(ambient_light_level, 0444, |
| 764 | adp8870_bl_ambient_light_level_show, NULL); |
| 765 | |
| 766 | static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev, |
| 767 | struct device_attribute *attr, char *buf) |
| 768 | { |
| 769 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 770 | int error; |
| 771 | uint8_t reg_val; |
| 772 | |
| 773 | mutex_lock(&data->lock); |
| 774 | error = adp8870_read(data->client, ADP8870_CFGR, ®_val); |
| 775 | mutex_unlock(&data->lock); |
| 776 | |
| 777 | if (error < 0) |
| 778 | return error; |
| 779 | |
| 780 | return sprintf(buf, "%u\n", |
| 781 | ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); |
| 782 | } |
| 783 | |
| 784 | static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, |
| 785 | struct device_attribute *attr, |
| 786 | const char *buf, size_t count) |
| 787 | { |
| 788 | struct adp8870_bl *data = dev_get_drvdata(dev); |
| 789 | unsigned long val; |
| 790 | uint8_t reg_val; |
| 791 | int ret; |
| 792 | |
Jingoo Han | dc406f5 | 2012-05-29 15:07:15 -0700 | [diff] [blame] | 793 | ret = kstrtoul(buf, 10, &val); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 794 | if (ret) |
| 795 | return ret; |
| 796 | |
| 797 | if (val == 0) { |
| 798 | /* Enable automatic ambient light sensing */ |
| 799 | adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); |
| 800 | } else if ((val > 0) && (val < 6)) { |
| 801 | /* Disable automatic ambient light sensing */ |
| 802 | adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN); |
| 803 | |
| 804 | /* Set user supplied ambient light zone */ |
| 805 | mutex_lock(&data->lock); |
| 806 | adp8870_read(data->client, ADP8870_CFGR, ®_val); |
| 807 | reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); |
| 808 | reg_val |= (val - 1) << CFGR_BLV_SHIFT; |
| 809 | adp8870_write(data->client, ADP8870_CFGR, reg_val); |
| 810 | mutex_unlock(&data->lock); |
| 811 | } |
| 812 | |
| 813 | return count; |
| 814 | } |
| 815 | static DEVICE_ATTR(ambient_light_zone, 0664, |
| 816 | adp8870_bl_ambient_light_zone_show, |
| 817 | adp8870_bl_ambient_light_zone_store); |
| 818 | #endif |
| 819 | |
| 820 | static struct attribute *adp8870_bl_attributes[] = { |
| 821 | &dev_attr_l5_dark_max.attr, |
| 822 | &dev_attr_l5_dark_dim.attr, |
| 823 | &dev_attr_l4_indoor_max.attr, |
| 824 | &dev_attr_l4_indoor_dim.attr, |
| 825 | &dev_attr_l3_office_max.attr, |
| 826 | &dev_attr_l3_office_dim.attr, |
| 827 | &dev_attr_l2_bright_max.attr, |
| 828 | &dev_attr_l2_bright_dim.attr, |
| 829 | &dev_attr_l1_daylight_max.attr, |
| 830 | &dev_attr_l1_daylight_dim.attr, |
| 831 | #ifdef ADP8870_EXT_FEATURES |
| 832 | &dev_attr_ambient_light_level.attr, |
| 833 | &dev_attr_ambient_light_zone.attr, |
| 834 | #endif |
| 835 | NULL |
| 836 | }; |
| 837 | |
| 838 | static const struct attribute_group adp8870_bl_attr_group = { |
| 839 | .attrs = adp8870_bl_attributes, |
| 840 | }; |
| 841 | |
Bill Pemberton | 1b9e450 | 2012-11-19 13:21:46 -0500 | [diff] [blame] | 842 | static int adp8870_probe(struct i2c_client *client, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 843 | const struct i2c_device_id *id) |
| 844 | { |
| 845 | struct backlight_properties props; |
| 846 | struct backlight_device *bl; |
| 847 | struct adp8870_bl *data; |
| 848 | struct adp8870_backlight_platform_data *pdata = |
Jingoo Han | c512794c | 2013-11-12 15:09:04 -0800 | [diff] [blame] | 849 | dev_get_platdata(&client->dev); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 850 | uint8_t reg_val; |
| 851 | int ret; |
| 852 | |
| 853 | if (!i2c_check_functionality(client->adapter, |
| 854 | I2C_FUNC_SMBUS_BYTE_DATA)) { |
| 855 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); |
| 856 | return -EIO; |
| 857 | } |
| 858 | |
| 859 | if (!pdata) { |
| 860 | dev_err(&client->dev, "no platform data?\n"); |
| 861 | return -EINVAL; |
| 862 | } |
| 863 | |
| 864 | ret = adp8870_read(client, ADP8870_MFDVID, ®_val); |
| 865 | if (ret < 0) |
| 866 | return -EIO; |
| 867 | |
| 868 | if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) { |
| 869 | dev_err(&client->dev, "failed to probe\n"); |
| 870 | return -ENODEV; |
| 871 | } |
| 872 | |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 873 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 874 | if (data == NULL) |
| 875 | return -ENOMEM; |
| 876 | |
| 877 | data->revid = ADP8870_DEVID(reg_val); |
| 878 | data->client = client; |
| 879 | data->pdata = pdata; |
| 880 | data->id = id->driver_data; |
| 881 | data->current_brightness = 0; |
| 882 | i2c_set_clientdata(client, data); |
| 883 | |
| 884 | mutex_init(&data->lock); |
| 885 | |
| 886 | memset(&props, 0, sizeof(props)); |
Andrew Morton | e1bbd19 | 2011-06-15 15:08:12 -0700 | [diff] [blame] | 887 | props.type = BACKLIGHT_RAW; |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 888 | props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; |
Jingoo Han | 568ee6c | 2013-11-12 15:09:09 -0800 | [diff] [blame] | 889 | bl = devm_backlight_device_register(&client->dev, |
| 890 | dev_driver_string(&client->dev), |
| 891 | &client->dev, data, &adp8870_bl_ops, &props); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 892 | if (IS_ERR(bl)) { |
| 893 | dev_err(&client->dev, "failed to register backlight\n"); |
Jingoo Han | 91cdb23 | 2012-05-29 15:07:21 -0700 | [diff] [blame] | 894 | return PTR_ERR(bl); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 895 | } |
| 896 | |
| 897 | data->bl = bl; |
| 898 | |
Jingoo Han | 8541b82 | 2013-04-29 16:17:33 -0700 | [diff] [blame] | 899 | if (pdata->en_ambl_sens) { |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 900 | ret = sysfs_create_group(&bl->dev.kobj, |
| 901 | &adp8870_bl_attr_group); |
Jingoo Han | 8541b82 | 2013-04-29 16:17:33 -0700 | [diff] [blame] | 902 | if (ret) { |
| 903 | dev_err(&client->dev, "failed to register sysfs\n"); |
Jingoo Han | 568ee6c | 2013-11-12 15:09:09 -0800 | [diff] [blame] | 904 | return ret; |
Jingoo Han | 8541b82 | 2013-04-29 16:17:33 -0700 | [diff] [blame] | 905 | } |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | ret = adp8870_bl_setup(bl); |
| 909 | if (ret) { |
| 910 | ret = -EIO; |
| 911 | goto out; |
| 912 | } |
| 913 | |
| 914 | backlight_update_status(bl); |
| 915 | |
| 916 | dev_info(&client->dev, "Rev.%d Backlight\n", data->revid); |
| 917 | |
| 918 | if (pdata->num_leds) |
| 919 | adp8870_led_probe(client); |
| 920 | |
| 921 | return 0; |
| 922 | |
| 923 | out: |
| 924 | if (data->pdata->en_ambl_sens) |
| 925 | sysfs_remove_group(&data->bl->dev.kobj, |
| 926 | &adp8870_bl_attr_group); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 927 | |
| 928 | return ret; |
| 929 | } |
| 930 | |
Bill Pemberton | 7e4b9d0 | 2012-11-19 13:26:34 -0500 | [diff] [blame] | 931 | static int adp8870_remove(struct i2c_client *client) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 932 | { |
| 933 | struct adp8870_bl *data = i2c_get_clientdata(client); |
| 934 | |
| 935 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
| 936 | |
| 937 | if (data->led) |
| 938 | adp8870_led_remove(client); |
| 939 | |
| 940 | if (data->pdata->en_ambl_sens) |
| 941 | sysfs_remove_group(&data->bl->dev.kobj, |
| 942 | &adp8870_bl_attr_group); |
| 943 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 944 | return 0; |
| 945 | } |
| 946 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 947 | #ifdef CONFIG_PM_SLEEP |
| 948 | static int adp8870_i2c_suspend(struct device *dev) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 949 | { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 950 | struct i2c_client *client = to_i2c_client(dev); |
| 951 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 952 | adp8870_clr_bits(client, ADP8870_MDCR, NSTBY); |
| 953 | |
| 954 | return 0; |
| 955 | } |
| 956 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 957 | static int adp8870_i2c_resume(struct device *dev) |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 958 | { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 959 | struct i2c_client *client = to_i2c_client(dev); |
| 960 | |
Lars-Peter Clausen | 5eb02c0 | 2013-02-21 16:44:04 -0800 | [diff] [blame] | 961 | adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 962 | |
| 963 | return 0; |
| 964 | } |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 965 | #endif |
| 966 | |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 967 | static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend, |
| 968 | adp8870_i2c_resume); |
| 969 | |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 970 | static const struct i2c_device_id adp8870_id[] = { |
| 971 | { "adp8870", 0 }, |
| 972 | { } |
| 973 | }; |
| 974 | MODULE_DEVICE_TABLE(i2c, adp8870_id); |
| 975 | |
| 976 | static struct i2c_driver adp8870_driver = { |
| 977 | .driver = { |
Jingoo Han | 3cd4291 | 2013-04-29 16:17:40 -0700 | [diff] [blame] | 978 | .name = KBUILD_MODNAME, |
| 979 | .pm = &adp8870_i2c_pm_ops, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 980 | }, |
| 981 | .probe = adp8870_probe, |
Bill Pemberton | d1723fa | 2012-11-19 13:21:09 -0500 | [diff] [blame] | 982 | .remove = adp8870_remove, |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 983 | .id_table = adp8870_id, |
| 984 | }; |
| 985 | |
Axel Lin | 81ce686 | 2012-03-23 15:01:59 -0700 | [diff] [blame] | 986 | module_i2c_driver(adp8870_driver); |
Michael Hennerich | a59ec1e | 2011-06-15 15:08:11 -0700 | [diff] [blame] | 987 | |
| 988 | MODULE_LICENSE("GPL v2"); |
| 989 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 990 | MODULE_DESCRIPTION("ADP8870 Backlight driver"); |
Axel Lin | c53252b | 2011-08-25 15:59:18 -0700 | [diff] [blame] | 991 | MODULE_ALIAS("i2c:adp8870-backlight"); |