diff options
Diffstat (limited to 'kernel/drivers/video/backlight/adp8860_bl.c')
| -rw-r--r-- | kernel/drivers/video/backlight/adp8860_bl.c | 822 |
1 files changed, 822 insertions, 0 deletions
diff --git a/kernel/drivers/video/backlight/adp8860_bl.c b/kernel/drivers/video/backlight/adp8860_bl.c new file mode 100644 index 000000000..71147f446 --- /dev/null +++ b/kernel/drivers/video/backlight/adp8860_bl.c @@ -0,0 +1,822 @@ +/* + * Backlight driver for Analog Devices ADP8860 Backlight Devices + * + * Copyright 2009-2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pm.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/leds.h> +#include <linux/slab.h> +#include <linux/workqueue.h> + +#include <linux/i2c/adp8860.h> +#define ADP8860_EXT_FEATURES +#define ADP8860_USE_LEDS + +#define ADP8860_MFDVID 0x00 /* Manufacturer and device ID */ +#define ADP8860_MDCR 0x01 /* Device mode and status */ +#define ADP8860_MDCR2 0x02 /* Device mode and Status Register 2 */ +#define ADP8860_INTR_EN 0x03 /* Interrupts enable */ +#define ADP8860_CFGR 0x04 /* Configuration register */ +#define ADP8860_BLSEN 0x05 /* Sink enable backlight or independent */ +#define ADP8860_BLOFF 0x06 /* Backlight off timeout */ +#define ADP8860_BLDIM 0x07 /* Backlight dim timeout */ +#define ADP8860_BLFR 0x08 /* Backlight fade in and out rates */ +#define ADP8860_BLMX1 0x09 /* Backlight (Brightness Level 1-daylight) maximum current */ +#define ADP8860_BLDM1 0x0A /* Backlight (Brightness Level 1-daylight) dim current */ +#define ADP8860_BLMX2 0x0B /* Backlight (Brightness Level 2-office) maximum current */ +#define ADP8860_BLDM2 0x0C /* Backlight (Brightness Level 2-office) dim current */ +#define ADP8860_BLMX3 0x0D /* Backlight (Brightness Level 3-dark) maximum current */ +#define ADP8860_BLDM3 0x0E /* Backlight (Brightness Level 3-dark) dim current */ +#define ADP8860_ISCFR 0x0F /* Independent sink current fade control register */ +#define ADP8860_ISCC 0x10 /* Independent sink current control register */ +#define ADP8860_ISCT1 0x11 /* Independent Sink Current Timer Register LED[7:5] */ +#define ADP8860_ISCT2 0x12 /* Independent Sink Current Timer Register LED[4:1] */ +#define ADP8860_ISCF 0x13 /* Independent sink current fade register */ +#define ADP8860_ISC7 0x14 /* Independent Sink Current LED7 */ +#define ADP8860_ISC6 0x15 /* Independent Sink Current LED6 */ +#define ADP8860_ISC5 0x16 /* Independent Sink Current LED5 */ +#define ADP8860_ISC4 0x17 /* Independent Sink Current LED4 */ +#define ADP8860_ISC3 0x18 /* Independent Sink Current LED3 */ +#define ADP8860_ISC2 0x19 /* Independent Sink Current LED2 */ +#define ADP8860_ISC1 0x1A /* Independent Sink Current LED1 */ +#define ADP8860_CCFG 0x1B /* Comparator configuration */ +#define ADP8860_CCFG2 0x1C /* Second comparator configuration */ +#define ADP8860_L2_TRP 0x1D /* L2 comparator reference */ +#define ADP8860_L2_HYS 0x1E /* L2 hysteresis */ +#define ADP8860_L3_TRP 0x1F /* L3 comparator reference */ +#define ADP8860_L3_HYS 0x20 /* L3 hysteresis */ +#define ADP8860_PH1LEVL 0x21 /* First phototransistor ambient light level-low byte register */ +#define ADP8860_PH1LEVH 0x22 /* First phototransistor ambient light level-high byte register */ +#define ADP8860_PH2LEVL 0x23 /* Second phototransistor ambient light level-low byte register */ +#define ADP8860_PH2LEVH 0x24 /* Second phototransistor ambient light level-high byte register */ + +#define ADP8860_MANUFID 0x0 /* Analog Devices ADP8860 Manufacturer ID */ +#define ADP8861_MANUFID 0x4 /* Analog Devices ADP8861 Manufacturer ID */ +#define ADP8863_MANUFID 0x2 /* Analog Devices ADP8863 Manufacturer ID */ + +#define ADP8860_DEVID(x) ((x) & 0xF) +#define ADP8860_MANID(x) ((x) >> 4) + +/* MDCR Device mode and status */ +#define INT_CFG (1 << 6) +#define NSTBY (1 << 5) +#define DIM_EN (1 << 4) +#define GDWN_DIS (1 << 3) +#define SIS_EN (1 << 2) +#define CMP_AUTOEN (1 << 1) +#define BLEN (1 << 0) + +/* ADP8860_CCFG Main ALS comparator level enable */ +#define L3_EN (1 << 1) +#define L2_EN (1 << 0) + +#define CFGR_BLV_SHIFT 3 +#define CFGR_BLV_MASK 0x3 +#define ADP8860_FLAG_LED_MASK 0xFF + +#define FADE_VAL(in, out) ((0xF & (in)) | ((0xF & (out)) << 4)) +#define BL_CFGR_VAL(law, blv) ((((blv) & CFGR_BLV_MASK) << CFGR_BLV_SHIFT) | ((0x3 & (law)) << 1)) +#define ALS_CCFG_VAL(filt) ((0x7 & filt) << 5) + +enum { + adp8860, + adp8861, + adp8863 +}; + +struct adp8860_led { + struct led_classdev cdev; + struct work_struct work; + struct i2c_client *client; + enum led_brightness new_brightness; + int id; + int flags; +}; + +struct adp8860_bl { + struct i2c_client *client; + struct backlight_device *bl; + struct adp8860_led *led; + struct adp8860_backlight_platform_data *pdata; + struct mutex lock; + unsigned long cached_daylight_max; + int id; + int revid; + int current_brightness; + unsigned en_ambl_sens:1; + unsigned gdwn_dis:1; +}; + +static int adp8860_read(struct i2c_client *client, int reg, uint8_t *val) +{ + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "failed reading at 0x%02x\n", reg); + return ret; + } + + *val = (uint8_t)ret; + return 0; +} + +static int adp8860_write(struct i2c_client *client, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(client, reg, val); +} + +static int adp8860_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8860_read(client, reg, ®_val); + + if (!ret && ((reg_val & bit_mask) != bit_mask)) { + reg_val |= bit_mask; + ret = adp8860_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +static int adp8860_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + uint8_t reg_val; + int ret; + + mutex_lock(&data->lock); + + ret = adp8860_read(client, reg, ®_val); + + if (!ret && (reg_val & bit_mask)) { + reg_val &= ~bit_mask; + ret = adp8860_write(client, reg, reg_val); + } + + mutex_unlock(&data->lock); + return ret; +} + +/* + * Independent sink / LED + */ +#if defined(ADP8860_USE_LEDS) +static void adp8860_led_work(struct work_struct *work) +{ + struct adp8860_led *led = container_of(work, struct adp8860_led, work); + + adp8860_write(led->client, ADP8860_ISC1 - led->id + 1, + led->new_brightness >> 1); +} + +static void adp8860_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct adp8860_led *led; + + led = container_of(led_cdev, struct adp8860_led, cdev); + led->new_brightness = value; + schedule_work(&led->work); +} + +static int adp8860_led_setup(struct adp8860_led *led) +{ + struct i2c_client *client = led->client; + int ret = 0; + + ret = adp8860_write(client, ADP8860_ISC1 - led->id + 1, 0); + ret |= adp8860_set_bits(client, ADP8860_ISCC, 1 << (led->id - 1)); + + if (led->id > 4) + ret |= adp8860_set_bits(client, ADP8860_ISCT1, + (led->flags & 0x3) << ((led->id - 5) * 2)); + else + ret |= adp8860_set_bits(client, ADP8860_ISCT2, + (led->flags & 0x3) << ((led->id - 1) * 2)); + + return ret; +} + +static int adp8860_led_probe(struct i2c_client *client) +{ + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8860_bl *data = i2c_get_clientdata(client); + struct adp8860_led *led, *led_dat; + struct led_info *cur_led; + int ret, i; + + led = devm_kzalloc(&client->dev, sizeof(*led) * pdata->num_leds, + GFP_KERNEL); + if (led == NULL) + return -ENOMEM; + + ret = adp8860_write(client, ADP8860_ISCFR, pdata->led_fade_law); + ret = adp8860_write(client, ADP8860_ISCT1, + (pdata->led_on_time & 0x3) << 6); + ret |= adp8860_write(client, ADP8860_ISCF, + FADE_VAL(pdata->led_fade_in, pdata->led_fade_out)); + + if (ret) { + dev_err(&client->dev, "failed to write\n"); + return ret; + } + + for (i = 0; i < pdata->num_leds; ++i) { + cur_led = &pdata->leds[i]; + led_dat = &led[i]; + + led_dat->id = cur_led->flags & ADP8860_FLAG_LED_MASK; + + if (led_dat->id > 7 || led_dat->id < 1) { + dev_err(&client->dev, "Invalid LED ID %d\n", + led_dat->id); + ret = -EINVAL; + goto err; + } + + if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) { + dev_err(&client->dev, "LED %d used by Backlight\n", + led_dat->id); + ret = -EBUSY; + goto err; + } + + led_dat->cdev.name = cur_led->name; + led_dat->cdev.default_trigger = cur_led->default_trigger; + led_dat->cdev.brightness_set = adp8860_led_set; + led_dat->cdev.brightness = LED_OFF; + led_dat->flags = cur_led->flags >> FLAG_OFFT_SHIFT; + led_dat->client = client; + led_dat->new_brightness = LED_OFF; + INIT_WORK(&led_dat->work, adp8860_led_work); + + ret = led_classdev_register(&client->dev, &led_dat->cdev); + if (ret) { + dev_err(&client->dev, "failed to register LED %d\n", + led_dat->id); + goto err; + } + + ret = adp8860_led_setup(led_dat); + if (ret) { + dev_err(&client->dev, "failed to write\n"); + i++; + goto err; + } + } + + data->led = led; + + return 0; + + err: + for (i = i - 1; i >= 0; --i) { + led_classdev_unregister(&led[i].cdev); + cancel_work_sync(&led[i].work); + } + + return ret; +} + +static int adp8860_led_remove(struct i2c_client *client) +{ + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct adp8860_bl *data = i2c_get_clientdata(client); + int i; + + for (i = 0; i < pdata->num_leds; i++) { + led_classdev_unregister(&data->led[i].cdev); + cancel_work_sync(&data->led[i].work); + } + + return 0; +} +#else +static int adp8860_led_probe(struct i2c_client *client) +{ + return 0; +} + +static int adp8860_led_remove(struct i2c_client *client) +{ + return 0; +} +#endif + +static int adp8860_bl_set(struct backlight_device *bl, int brightness) +{ + struct adp8860_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + int ret = 0; + + if (data->en_ambl_sens) { + if ((brightness > 0) && (brightness < ADP8860_MAX_BRIGHTNESS)) { + /* Disable Ambient Light auto adjust */ + ret |= adp8860_clr_bits(client, ADP8860_MDCR, + CMP_AUTOEN); + ret |= adp8860_write(client, ADP8860_BLMX1, brightness); + } else { + /* + * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust + * restore daylight l1 sysfs brightness + */ + ret |= adp8860_write(client, ADP8860_BLMX1, + data->cached_daylight_max); + ret |= adp8860_set_bits(client, ADP8860_MDCR, + CMP_AUTOEN); + } + } else + ret |= adp8860_write(client, ADP8860_BLMX1, brightness); + + if (data->current_brightness && brightness == 0) + ret |= adp8860_set_bits(client, + ADP8860_MDCR, DIM_EN); + else if (data->current_brightness == 0 && brightness) + ret |= adp8860_clr_bits(client, + ADP8860_MDCR, DIM_EN); + + if (!ret) + data->current_brightness = brightness; + + return ret; +} + +static int adp8860_bl_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + return adp8860_bl_set(bl, brightness); +} + +static int adp8860_bl_get_brightness(struct backlight_device *bl) +{ + struct adp8860_bl *data = bl_get_data(bl); + + return data->current_brightness; +} + +static const struct backlight_ops adp8860_bl_ops = { + .update_status = adp8860_bl_update_status, + .get_brightness = adp8860_bl_get_brightness, +}; + +static int adp8860_bl_setup(struct backlight_device *bl) +{ + struct adp8860_bl *data = bl_get_data(bl); + struct i2c_client *client = data->client; + struct adp8860_backlight_platform_data *pdata = data->pdata; + int ret = 0; + + ret |= adp8860_write(client, ADP8860_BLSEN, ~pdata->bl_led_assign); + ret |= adp8860_write(client, ADP8860_BLMX1, pdata->l1_daylight_max); + ret |= adp8860_write(client, ADP8860_BLDM1, pdata->l1_daylight_dim); + + if (data->en_ambl_sens) { + data->cached_daylight_max = pdata->l1_daylight_max; + ret |= adp8860_write(client, ADP8860_BLMX2, + pdata->l2_office_max); + ret |= adp8860_write(client, ADP8860_BLDM2, + pdata->l2_office_dim); + ret |= adp8860_write(client, ADP8860_BLMX3, + pdata->l3_dark_max); + ret |= adp8860_write(client, ADP8860_BLDM3, + pdata->l3_dark_dim); + + ret |= adp8860_write(client, ADP8860_L2_TRP, pdata->l2_trip); + ret |= adp8860_write(client, ADP8860_L2_HYS, pdata->l2_hyst); + ret |= adp8860_write(client, ADP8860_L3_TRP, pdata->l3_trip); + ret |= adp8860_write(client, ADP8860_L3_HYS, pdata->l3_hyst); + ret |= adp8860_write(client, ADP8860_CCFG, L2_EN | L3_EN | + ALS_CCFG_VAL(pdata->abml_filt)); + } + + ret |= adp8860_write(client, ADP8860_CFGR, + BL_CFGR_VAL(pdata->bl_fade_law, 0)); + + ret |= adp8860_write(client, ADP8860_BLFR, FADE_VAL(pdata->bl_fade_in, + pdata->bl_fade_out)); + + ret |= adp8860_set_bits(client, ADP8860_MDCR, BLEN | DIM_EN | NSTBY | + (data->gdwn_dis ? GDWN_DIS : 0)); + + return ret; +} + +static ssize_t adp8860_show(struct device *dev, char *buf, int reg) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, reg, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", reg_val); +} + +static ssize_t adp8860_store(struct device *dev, const char *buf, + size_t count, int reg) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&data->lock); + adp8860_write(data->client, reg, val); + mutex_unlock(&data->lock); + + return count; +} + +static ssize_t adp8860_bl_l3_dark_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX3); +} + +static ssize_t adp8860_bl_l3_dark_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLMX3); +} + +static DEVICE_ATTR(l3_dark_max, 0664, adp8860_bl_l3_dark_max_show, + adp8860_bl_l3_dark_max_store); + +static ssize_t adp8860_bl_l2_office_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX2); +} + +static ssize_t adp8860_bl_l2_office_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLMX2); +} +static DEVICE_ATTR(l2_office_max, 0664, adp8860_bl_l2_office_max_show, + adp8860_bl_l2_office_max_store); + +static ssize_t adp8860_bl_l1_daylight_max_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLMX1); +} + +static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int ret = kstrtoul(buf, 10, &data->cached_daylight_max); + + if (ret) + return ret; + + return adp8860_store(dev, buf, count, ADP8860_BLMX1); +} +static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, + adp8860_bl_l1_daylight_max_store); + +static ssize_t adp8860_bl_l3_dark_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM3); +} + +static ssize_t adp8860_bl_l3_dark_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM3); +} +static DEVICE_ATTR(l3_dark_dim, 0664, adp8860_bl_l3_dark_dim_show, + adp8860_bl_l3_dark_dim_store); + +static ssize_t adp8860_bl_l2_office_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM2); +} + +static ssize_t adp8860_bl_l2_office_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM2); +} +static DEVICE_ATTR(l2_office_dim, 0664, adp8860_bl_l2_office_dim_show, + adp8860_bl_l2_office_dim_store); + +static ssize_t adp8860_bl_l1_daylight_dim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return adp8860_show(dev, buf, ADP8860_BLDM1); +} + +static ssize_t adp8860_bl_l1_daylight_dim_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return adp8860_store(dev, buf, count, ADP8860_BLDM1); +} +static DEVICE_ATTR(l1_daylight_dim, 0664, adp8860_bl_l1_daylight_dim_show, + adp8860_bl_l1_daylight_dim_store); + +#ifdef ADP8860_EXT_FEATURES +static ssize_t adp8860_bl_ambient_light_level_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + uint16_t ret_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, ADP8860_PH1LEVL, ®_val); + ret_val = reg_val; + error |= adp8860_read(data->client, ADP8860_PH1LEVH, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + /* Return 13-bit conversion value for the first light sensor */ + ret_val += (reg_val & 0x1F) << 8; + + return sprintf(buf, "%u\n", ret_val); +} +static DEVICE_ATTR(ambient_light_level, 0444, + adp8860_bl_ambient_light_level_show, NULL); + +static ssize_t adp8860_bl_ambient_light_zone_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + int error; + uint8_t reg_val; + + mutex_lock(&data->lock); + error = adp8860_read(data->client, ADP8860_CFGR, ®_val); + mutex_unlock(&data->lock); + + if (error < 0) + return error; + + return sprintf(buf, "%u\n", + ((reg_val >> CFGR_BLV_SHIFT) & CFGR_BLV_MASK) + 1); +} + +static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adp8860_bl *data = dev_get_drvdata(dev); + unsigned long val; + uint8_t reg_val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret) + return ret; + + if (val == 0) { + /* Enable automatic ambient light sensing */ + adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); + } else if ((val > 0) && (val <= 3)) { + /* Disable automatic ambient light sensing */ + adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); + + /* Set user supplied ambient light zone */ + mutex_lock(&data->lock); + adp8860_read(data->client, ADP8860_CFGR, ®_val); + reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); + reg_val |= (val - 1) << CFGR_BLV_SHIFT; + adp8860_write(data->client, ADP8860_CFGR, reg_val); + mutex_unlock(&data->lock); + } + + return count; +} +static DEVICE_ATTR(ambient_light_zone, 0664, + adp8860_bl_ambient_light_zone_show, + adp8860_bl_ambient_light_zone_store); +#endif + +static struct attribute *adp8860_bl_attributes[] = { + &dev_attr_l3_dark_max.attr, + &dev_attr_l3_dark_dim.attr, + &dev_attr_l2_office_max.attr, + &dev_attr_l2_office_dim.attr, + &dev_attr_l1_daylight_max.attr, + &dev_attr_l1_daylight_dim.attr, +#ifdef ADP8860_EXT_FEATURES + &dev_attr_ambient_light_level.attr, + &dev_attr_ambient_light_zone.attr, +#endif + NULL +}; + +static const struct attribute_group adp8860_bl_attr_group = { + .attrs = adp8860_bl_attributes, +}; + +static int adp8860_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct backlight_device *bl; + struct adp8860_bl *data; + struct adp8860_backlight_platform_data *pdata = + dev_get_platdata(&client->dev); + struct backlight_properties props; + uint8_t reg_val; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); + return -EIO; + } + + if (!pdata) { + dev_err(&client->dev, "no platform data?\n"); + return -EINVAL; + } + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + ret = adp8860_read(client, ADP8860_MFDVID, ®_val); + if (ret < 0) + return ret; + + switch (ADP8860_MANID(reg_val)) { + case ADP8863_MANUFID: + data->gdwn_dis = !!pdata->gdwn_dis; + case ADP8860_MANUFID: + data->en_ambl_sens = !!pdata->en_ambl_sens; + break; + case ADP8861_MANUFID: + data->gdwn_dis = !!pdata->gdwn_dis; + break; + default: + dev_err(&client->dev, "failed to probe\n"); + return -ENODEV; + } + + /* It's confirmed that the DEVID field is actually a REVID */ + + data->revid = ADP8860_DEVID(reg_val); + data->client = client; + data->pdata = pdata; + data->id = id->driver_data; + data->current_brightness = 0; + i2c_set_clientdata(client, data); + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = ADP8860_MAX_BRIGHTNESS; + + mutex_init(&data->lock); + + bl = devm_backlight_device_register(&client->dev, + dev_driver_string(&client->dev), + &client->dev, data, &adp8860_bl_ops, &props); + if (IS_ERR(bl)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = ADP8860_MAX_BRIGHTNESS; + + data->bl = bl; + + if (data->en_ambl_sens) + ret = sysfs_create_group(&bl->dev.kobj, + &adp8860_bl_attr_group); + + if (ret) { + dev_err(&client->dev, "failed to register sysfs\n"); + return ret; + } + + ret = adp8860_bl_setup(bl); + if (ret) { + ret = -EIO; + goto out; + } + + backlight_update_status(bl); + + dev_info(&client->dev, "%s Rev.%d Backlight\n", + client->name, data->revid); + + if (pdata->num_leds) + adp8860_led_probe(client); + + return 0; + +out: + if (data->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8860_bl_attr_group); + + return ret; +} + +static int adp8860_remove(struct i2c_client *client) +{ + struct adp8860_bl *data = i2c_get_clientdata(client); + + adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); + + if (data->led) + adp8860_led_remove(client); + + if (data->en_ambl_sens) + sysfs_remove_group(&data->bl->dev.kobj, + &adp8860_bl_attr_group); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int adp8860_i2c_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); + + return 0; +} + +static int adp8860_i2c_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + + adp8860_set_bits(client, ADP8860_MDCR, NSTBY | BLEN); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(adp8860_i2c_pm_ops, adp8860_i2c_suspend, + adp8860_i2c_resume); + +static const struct i2c_device_id adp8860_id[] = { + { "adp8860", adp8860 }, + { "adp8861", adp8861 }, + { "adp8863", adp8863 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adp8860_id); + +static struct i2c_driver adp8860_driver = { + .driver = { + .name = KBUILD_MODNAME, + .pm = &adp8860_i2c_pm_ops, + }, + .probe = adp8860_probe, + .remove = adp8860_remove, + .id_table = adp8860_id, +}; + +module_i2c_driver(adp8860_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("ADP8860 Backlight driver"); +MODULE_ALIAS("i2c:adp8860-backlight"); |