/* * 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/version.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) == 0)) { 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 __devinit adp8860_led_probe(struct i2c_client *client) { struct adp8860_backlight_platform_data *pdata = client->dev.platform_data; struct adp8860_bl *data = i2c_get_clientdata(client); struct adp8860_led *led, *led_dat; struct led_info *cur_led; int ret, i; led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL); if (led == NULL) { dev_err(&client->dev, "failed to alloc memory\n"); 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"); goto err_free; } 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); 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); 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); } err_free: kfree(led); return ret; } static int __devexit adp8860_led_remove(struct i2c_client *client) { struct adp8860_backlight_platform_data *pdata = client->dev.platform_data; 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); } kfree(data->led); return 0; } #else static int __devinit adp8860_led_probe(struct i2c_client *client) { return 0; } static int __devexit 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 = strict_strtoul(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 = strict_strtoul(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 = strict_strtoul(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 __devinit 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 = client->dev.platform_data; 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 = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; ret = adp8860_read(client, ADP8860_MFDVID, ®_val); if (ret < 0) goto out2; 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"); ret = -ENODEV; goto out2; } /* 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 = backlight_device_register(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"); ret = PTR_ERR(bl); goto out2; } bl->props.max_brightness = 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"); goto out1; } 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); out1: backlight_device_unregister(bl); out2: kfree(data); return ret; } static int __devexit 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); backlight_device_unregister(data->bl); kfree(data); return 0; } #ifdef CONFIG_PM static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message) { adp8860_clr_bits(client, ADP8860_MDCR, NSTBY); return 0; } static int adp8860_i2c_resume(struct i2c_client *client) { adp8860_set_bits(client, ADP8860_MDCR, NSTBY); return 0; } #else #define adp8860_i2c_suspend NULL #define adp8860_i2c_resume NULL #endif 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, }, .probe = adp8860_probe, .remove = __devexit_p(adp8860_remove), .suspend = adp8860_i2c_suspend, .resume = adp8860_i2c_resume, .id_table = adp8860_id, }; static int __init adp8860_init(void) { return i2c_add_driver(&adp8860_driver); } module_init(adp8860_init); static void __exit adp8860_exit(void) { i2c_del_driver(&adp8860_driver); } module_exit(adp8860_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("ADP8860 Backlight driver"); MODULE_ALIAS("i2c:adp8860-backlight");