backlight: new driver for the ADP8870 backlight devices
authorMichael Hennerich <michael.hennerich@analog.com>
Wed, 15 Jun 2011 22:08:11 +0000 (15:08 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 16 Jun 2011 03:03:59 +0000 (20:03 -0700)
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 [new file with mode: 0644]
drivers/video/backlight/Kconfig
drivers/video/backlight/Makefile
drivers/video/backlight/adp8870_bl.c [new file with mode: 0644]
include/linux/i2c/adp8870.h [new file with mode: 0644]

diff --git a/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 b/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870
new file mode 100644 (file)
index 0000000..aa11dbd
--- /dev/null
@@ -0,0 +1,56 @@
+What:          /sys/class/backlight/<backlight>/<ambient light zone>_max
+What:          /sys/class/backlight/<backlight>/l1_daylight_max
+What:          /sys/class/backlight/<backlight>/l2_bright_max
+What:          /sys/class/backlight/<backlight>/l3_office_max
+What:          /sys/class/backlight/<backlight>/l4_indoor_max
+What:          /sys/class/backlight/<backlight>/l5_dark_max
+Date:          Mai 2011
+KernelVersion: 2.6.40
+Contact:       device-drivers-devel@blackfin.uclinux.org
+Description:
+               Control the maximum brightness for <ambient light zone>
+               on this <backlight>. Values are between 0 and 127. This file
+               will also show the brightness level stored for this
+               <ambient light zone>.
+
+What:          /sys/class/backlight/<backlight>/<ambient light zone>_dim
+What:          /sys/class/backlight/<backlight>/l2_bright_dim
+What:          /sys/class/backlight/<backlight>/l3_office_dim
+What:          /sys/class/backlight/<backlight>/l4_indoor_dim
+What:          /sys/class/backlight/<backlight>/l5_dark_dim
+Date:          Mai 2011
+KernelVersion: 2.6.40
+Contact:       device-drivers-devel@blackfin.uclinux.org
+Description:
+               Control the dim brightness for <ambient light zone>
+               on this <backlight>. Values are between 0 and 127, typically
+               set to 0. Full off when the backlight is disabled.
+               This file will also show the dim brightness level stored for
+               this <ambient light zone>.
+
+What:          /sys/class/backlight/<backlight>/ambient_light_level
+Date:          Mai 2011
+KernelVersion: 2.6.40
+Contact:       device-drivers-devel@blackfin.uclinux.org
+Description:
+               Get conversion value of the light sensor.
+               This value is updated every 80 ms (when the light sensor
+               is enabled). Returns integer between 0 (dark) and
+               8000 (max ambient brightness)
+
+What:          /sys/class/backlight/<backlight>/ambient_light_zone
+Date:          Mai 2011
+KernelVersion: 2.6.40
+Contact:       device-drivers-devel@blackfin.uclinux.org
+Description:
+               Get/Set current ambient light zone. Reading returns
+               integer between 1..5 (1 = daylight, 2 = bright, ..., 5 = dark).
+               Writing a value between 1..5 forces the backlight controller
+               to enter the corresponding ambient light zone.
+               Writing 0 returns to normal/automatic ambient light level
+               operation. The ambient light sensing feature on these devices
+               is an extension to the API documented in
+               Documentation/ABI/stable/sysfs-class-backlight.
+               It can be enabled by writing the value stored in
+               /sys/class/backlight/<backlight>/max_brightness to
+               /sys/class/backlight/<backlight>/brightness.
\ No newline at end of file
index 0c9373bedd1f39d61d8b391bcc54a630d6d981c8..2d93c8d61ad5e2aa9ea2cd48d30581aad7cf8fb4 100644 (file)
@@ -302,6 +302,18 @@ config BACKLIGHT_ADP8860
          To compile this driver as a module, choose M here: the module will
          be called adp8860_bl.
 
+config BACKLIGHT_ADP8870
+       tristate "Backlight Driver for ADP8870 using WLED"
+       depends on BACKLIGHT_CLASS_DEVICE && I2C
+       select NEW_LEDS
+       select LEDS_CLASS
+       help
+         If you have a LCD backlight connected to the ADP8870,
+         say Y here to enable this driver.
+
+         To compile this driver as a module, choose M here: the module will
+         be called adp8870_bl.
+
 config BACKLIGHT_88PM860X
        tristate "Backlight Driver for 88PM8606 using WLED"
        depends on MFD_88PM860X
index b9ca8490df87850dc746e5a4661b67f5294589a4..ee72adb8786ed2f9f71de431987f0f5e11da7fc5 100644 (file)
@@ -34,6 +34,7 @@ obj-$(CONFIG_BACKLIGHT_WM831X)        += wm831x_bl.o
 obj-$(CONFIG_BACKLIGHT_ADX)    += adx_bl.o
 obj-$(CONFIG_BACKLIGHT_ADP5520)        += adp5520_bl.o
 obj-$(CONFIG_BACKLIGHT_ADP8860)        += adp8860_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP8870)        += adp8870_bl.o
 obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
 obj-$(CONFIG_BACKLIGHT_PCF50633)       += pcf50633-backlight.o
 
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
new file mode 100644 (file)
index 0000000..e320b62
--- /dev/null
@@ -0,0 +1,1011 @@
+/*
+ * Backlight driver for Analog Devices ADP8870 Backlight Devices
+ *
+ * Copyright 2009-2011 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/workqueue.h>
+#include <linux/slab.h>
+
+#include <linux/i2c/adp8870.h>
+#define ADP8870_EXT_FEATURES
+#define ADP8870_USE_LEDS
+
+
+#define ADP8870_MFDVID 0x00  /* Manufacturer and device ID */
+#define ADP8870_MDCR   0x01  /* Device mode and status */
+#define ADP8870_INT_STAT 0x02  /* Interrupts status */
+#define ADP8870_INT_EN 0x03  /* Interrupts enable */
+#define ADP8870_CFGR   0x04  /* Configuration register */
+#define ADP8870_BLSEL  0x05  /* Sink enable backlight or independent */
+#define ADP8870_PWMLED 0x06  /* PWM Enable Selection Register */
+#define ADP8870_BLOFF  0x07  /* Backlight off timeout */
+#define ADP8870_BLDIM  0x08  /* Backlight dim timeout */
+#define ADP8870_BLFR   0x09  /* Backlight fade in and out rates */
+#define ADP8870_BLMX1  0x0A  /* Backlight (Brightness Level 1-daylight) maximum current */
+#define ADP8870_BLDM1  0x0B  /* Backlight (Brightness Level 1-daylight) dim current */
+#define ADP8870_BLMX2  0x0C  /* Backlight (Brightness Level 2-bright) maximum current */
+#define ADP8870_BLDM2  0x0D  /* Backlight (Brightness Level 2-bright) dim current */
+#define ADP8870_BLMX3  0x0E  /* Backlight (Brightness Level 3-office) maximum current */
+#define ADP8870_BLDM3  0x0F  /* Backlight (Brightness Level 3-office) dim current */
+#define ADP8870_BLMX4  0x10  /* Backlight (Brightness Level 4-indoor) maximum current */
+#define ADP8870_BLDM4  0x11  /* Backlight (Brightness Level 4-indoor) dim current */
+#define ADP8870_BLMX5  0x12  /* Backlight (Brightness Level 5-dark) maximum current */
+#define ADP8870_BLDM5  0x13  /* Backlight (Brightness Level 5-dark) dim current */
+#define ADP8870_ISCLAW 0x1A  /* Independent sink current fade law register */
+#define ADP8870_ISCC   0x1B  /* Independent sink current control register */
+#define ADP8870_ISCT1  0x1C  /* Independent Sink Current Timer Register LED[7:5] */
+#define ADP8870_ISCT2  0x1D  /* Independent Sink Current Timer Register LED[4:1] */
+#define ADP8870_ISCF   0x1E  /* Independent sink current fade register */
+#define ADP8870_ISC1   0x1F  /* Independent Sink Current LED1 */
+#define ADP8870_ISC2   0x20  /* Independent Sink Current LED2 */
+#define ADP8870_ISC3   0x21  /* Independent Sink Current LED3 */
+#define ADP8870_ISC4   0x22  /* Independent Sink Current LED4 */
+#define ADP8870_ISC5   0x23  /* Independent Sink Current LED5 */
+#define ADP8870_ISC6   0x24  /* Independent Sink Current LED6 */
+#define ADP8870_ISC7   0x25  /* Independent Sink Current LED7 (Brightness Level 1-daylight) */
+#define ADP8870_ISC7_L2        0x26  /* Independent Sink Current LED7 (Brightness Level 2-bright) */
+#define ADP8870_ISC7_L3        0x27  /* Independent Sink Current LED7 (Brightness Level 3-office) */
+#define ADP8870_ISC7_L4        0x28  /* Independent Sink Current LED7 (Brightness Level 4-indoor) */
+#define ADP8870_ISC7_L5        0x29  /* Independent Sink Current LED7 (Brightness Level 5-dark) */
+#define ADP8870_CMP_CTL        0x2D  /* ALS Comparator Control Register */
+#define ADP8870_ALS1_EN        0x2E  /* Main ALS comparator level enable */
+#define ADP8870_ALS2_EN        0x2F  /* Second ALS comparator level enable */
+#define ADP8870_ALS1_STAT 0x30  /* Main ALS Comparator Status Register */
+#define ADP8870_ALS2_STAT 0x31  /* Second ALS Comparator Status Register */
+#define ADP8870_L2TRP  0x32  /* L2 comparator reference */
+#define ADP8870_L2HYS  0x33  /* L2 hysteresis */
+#define ADP8870_L3TRP  0x34  /* L3 comparator reference */
+#define ADP8870_L3HYS  0x35  /* L3 hysteresis */
+#define ADP8870_L4TRP  0x36  /* L4 comparator reference */
+#define ADP8870_L4HYS  0x37  /* L4 hysteresis */
+#define ADP8870_L5TRP  0x38  /* L5 comparator reference */
+#define ADP8870_L5HYS  0x39  /* L5 hysteresis */
+#define ADP8870_PH1LEVL        0x40  /* First phototransistor ambient light level-low byte register */
+#define ADP8870_PH1LEVH        0x41  /* First phototransistor ambient light level-high byte register */
+#define ADP8870_PH2LEVL        0x42  /* Second phototransistor ambient light level-low byte register */
+#define ADP8870_PH2LEVH        0x43  /* Second phototransistor ambient light level-high byte register */
+
+#define ADP8870_MANUFID                0x3  /* Analog Devices AD8870 Manufacturer and device ID */
+#define ADP8870_DEVID(x)       ((x) & 0xF)
+#define ADP8870_MANID(x)       ((x) >> 4)
+
+/* MDCR Device mode and status */
+#define D7ALSEN                        (1 << 7)
+#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)
+
+/* ADP8870_ALS1_EN Main ALS comparator level enable */
+#define L5_EN                  (1 << 3)
+#define L4_EN                  (1 << 2)
+#define L3_EN                  (1 << 1)
+#define L2_EN                  (1 << 0)
+
+#define CFGR_BLV_SHIFT         3
+#define CFGR_BLV_MASK          0x7
+#define ADP8870_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_CMPR_CFG_VAL(filt) ((0x7 & (filt)) << 1)
+
+struct adp8870_bl {
+       struct i2c_client *client;
+       struct backlight_device *bl;
+       struct adp8870_led *led;
+       struct adp8870_backlight_platform_data *pdata;
+       struct mutex lock;
+       unsigned long cached_daylight_max;
+       int id;
+       int revid;
+       int current_brightness;
+};
+
+struct adp8870_led {
+       struct led_classdev     cdev;
+       struct work_struct      work;
+       struct i2c_client       *client;
+       enum led_brightness     new_brightness;
+       int                     id;
+       int                     flags;
+};
+
+static int adp8870_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 = ret;
+       return 0;
+}
+
+
+static int adp8870_write(struct i2c_client *client, u8 reg, u8 val)
+{
+       int ret = i2c_smbus_write_byte_data(client, reg, val);
+       if (ret)
+               dev_err(&client->dev, "failed to write\n");
+
+       return ret;
+}
+
+static int adp8870_set_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
+{
+       struct adp8870_bl *data = i2c_get_clientdata(client);
+       uint8_t reg_val;
+       int ret;
+
+       mutex_lock(&data->lock);
+
+       ret = adp8870_read(client, reg, &reg_val);
+
+       if (!ret && ((reg_val & bit_mask) == 0)) {
+               reg_val |= bit_mask;
+               ret = adp8870_write(client, reg, reg_val);
+       }
+
+       mutex_unlock(&data->lock);
+       return ret;
+}
+
+static int adp8870_clr_bits(struct i2c_client *client, int reg, uint8_t bit_mask)
+{
+       struct adp8870_bl *data = i2c_get_clientdata(client);
+       uint8_t reg_val;
+       int ret;
+
+       mutex_lock(&data->lock);
+
+       ret = adp8870_read(client, reg, &reg_val);
+
+       if (!ret && (reg_val & bit_mask)) {
+               reg_val &= ~bit_mask;
+               ret = adp8870_write(client, reg, reg_val);
+       }
+
+       mutex_unlock(&data->lock);
+       return ret;
+}
+
+/*
+ * Independent sink / LED
+ */
+#if defined(ADP8870_USE_LEDS)
+static void adp8870_led_work(struct work_struct *work)
+{
+       struct adp8870_led *led = container_of(work, struct adp8870_led, work);
+       adp8870_write(led->client, ADP8870_ISC1 + led->id - 1,
+                        led->new_brightness >> 1);
+}
+
+static void adp8870_led_set(struct led_classdev *led_cdev,
+                          enum led_brightness value)
+{
+       struct adp8870_led *led;
+
+       led = container_of(led_cdev, struct adp8870_led, cdev);
+       led->new_brightness = value;
+       /*
+        * Use workqueue for IO since I2C operations can sleep.
+        */
+       schedule_work(&led->work);
+}
+
+static int adp8870_led_setup(struct adp8870_led *led)
+{
+       struct i2c_client *client = led->client;
+       int ret = 0;
+
+       ret = adp8870_write(client, ADP8870_ISC1 + led->id - 1, 0);
+       if (ret)
+               return ret;
+
+       ret = adp8870_set_bits(client, ADP8870_ISCC, 1 << (led->id - 1));
+       if (ret)
+               return ret;
+
+       if (led->id > 4)
+               ret = adp8870_set_bits(client, ADP8870_ISCT1,
+                               (led->flags & 0x3) << ((led->id - 5) * 2));
+       else
+               ret = adp8870_set_bits(client, ADP8870_ISCT2,
+                               (led->flags & 0x3) << ((led->id - 1) * 2));
+
+       return ret;
+}
+
+static int __devinit adp8870_led_probe(struct i2c_client *client)
+{
+       struct adp8870_backlight_platform_data *pdata =
+               client->dev.platform_data;
+       struct adp8870_bl *data = i2c_get_clientdata(client);
+       struct adp8870_led *led, *led_dat;
+       struct led_info *cur_led;
+       int ret, i;
+
+
+       led = kcalloc(pdata->num_leds, sizeof(*led), GFP_KERNEL);
+       if (led == NULL) {
+               dev_err(&client->dev, "failed to alloc memory\n");
+               return -ENOMEM;
+       }
+
+       ret = adp8870_write(client, ADP8870_ISCLAW, pdata->led_fade_law);
+       if (ret)
+               goto err_free;
+
+       ret = adp8870_write(client, ADP8870_ISCT1,
+                       (pdata->led_on_time & 0x3) << 6);
+       if (ret)
+               goto err_free;
+
+       ret = adp8870_write(client, ADP8870_ISCF,
+                       FADE_VAL(pdata->led_fade_in, pdata->led_fade_out));
+       if (ret)
+               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 & ADP8870_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 = adp8870_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, adp8870_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 = adp8870_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 adp8870_led_remove(struct i2c_client *client)
+{
+       struct adp8870_backlight_platform_data *pdata =
+               client->dev.platform_data;
+       struct adp8870_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 adp8870_led_probe(struct i2c_client *client)
+{
+       return 0;
+}
+
+static int __devexit adp8870_led_remove(struct i2c_client *client)
+{
+       return 0;
+}
+#endif
+
+static int adp8870_bl_set(struct backlight_device *bl, int brightness)
+{
+       struct adp8870_bl *data = bl_get_data(bl);
+       struct i2c_client *client = data->client;
+       int ret = 0;
+
+       if (data->pdata->en_ambl_sens) {
+               if ((brightness > 0) && (brightness < ADP8870_MAX_BRIGHTNESS)) {
+                       /* Disable Ambient Light auto adjust */
+                       ret = adp8870_clr_bits(client, ADP8870_MDCR,
+                                       CMP_AUTOEN);
+                       if (ret)
+                               return ret;
+                       ret = adp8870_write(client, ADP8870_BLMX1, brightness);
+                       if (ret)
+                               return ret;
+               } else {
+                       /*
+                        * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
+                        * restore daylight l1 sysfs brightness
+                        */
+                       ret = adp8870_write(client, ADP8870_BLMX1,
+                                        data->cached_daylight_max);
+                       if (ret)
+                               return ret;
+
+                       ret = adp8870_set_bits(client, ADP8870_MDCR,
+                                        CMP_AUTOEN);
+                       if (ret)
+                               return ret;
+               }
+       } else {
+               ret = adp8870_write(client, ADP8870_BLMX1, brightness);
+               if (ret)
+                       return ret;
+       }
+
+       if (data->current_brightness && brightness == 0)
+               ret = adp8870_set_bits(client,
+                               ADP8870_MDCR, DIM_EN);
+       else if (data->current_brightness == 0 && brightness)
+               ret = adp8870_clr_bits(client,
+                               ADP8870_MDCR, DIM_EN);
+
+       if (!ret)
+               data->current_brightness = brightness;
+
+       return ret;
+}
+
+static int adp8870_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 adp8870_bl_set(bl, brightness);
+}
+
+static int adp8870_bl_get_brightness(struct backlight_device *bl)
+{
+       struct adp8870_bl *data = bl_get_data(bl);
+
+       return data->current_brightness;
+}
+
+static const struct backlight_ops adp8870_bl_ops = {
+       .update_status  = adp8870_bl_update_status,
+       .get_brightness = adp8870_bl_get_brightness,
+};
+
+static int adp8870_bl_setup(struct backlight_device *bl)
+{
+       struct adp8870_bl *data = bl_get_data(bl);
+       struct i2c_client *client = data->client;
+       struct adp8870_backlight_platform_data *pdata = data->pdata;
+       int ret = 0;
+
+       ret = adp8870_write(client, ADP8870_BLSEL, ~pdata->bl_led_assign);
+       if (ret)
+               return ret;
+
+       ret = adp8870_write(client, ADP8870_PWMLED, pdata->pwm_assign);
+       if (ret)
+               return ret;
+
+       ret = adp8870_write(client, ADP8870_BLMX1, pdata->l1_daylight_max);
+       if (ret)
+               return ret;
+
+       ret = adp8870_write(client, ADP8870_BLDM1, pdata->l1_daylight_dim);
+       if (ret)
+               return ret;
+
+       if (pdata->en_ambl_sens) {
+               data->cached_daylight_max = pdata->l1_daylight_max;
+               ret = adp8870_write(client, ADP8870_BLMX2,
+                                               pdata->l2_bright_max);
+               if (ret)
+                       return ret;
+               ret = adp8870_write(client, ADP8870_BLDM2,
+                                               pdata->l2_bright_dim);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_BLMX3,
+                                               pdata->l3_office_max);
+               if (ret)
+                       return ret;
+               ret = adp8870_write(client, ADP8870_BLDM3,
+                                               pdata->l3_office_dim);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_BLMX4,
+                                               pdata->l4_indoor_max);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_BLDM4,
+                                               pdata->l4_indor_dim);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_BLMX5,
+                                               pdata->l5_dark_max);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_BLDM5,
+                                               pdata->l5_dark_dim);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L2TRP, pdata->l2_trip);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L2HYS, pdata->l2_hyst);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L3TRP, pdata->l3_trip);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L3HYS, pdata->l3_hyst);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L4TRP, pdata->l4_trip);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L4HYS, pdata->l4_hyst);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L5TRP, pdata->l5_trip);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_L5HYS, pdata->l5_hyst);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_ALS1_EN, L5_EN | L4_EN |
+                                               L3_EN | L2_EN);
+               if (ret)
+                       return ret;
+
+               ret = adp8870_write(client, ADP8870_CMP_CTL,
+                       ALS_CMPR_CFG_VAL(pdata->abml_filt));
+               if (ret)
+                       return ret;
+       }
+
+       ret = adp8870_write(client, ADP8870_CFGR,
+                       BL_CFGR_VAL(pdata->bl_fade_law, 0));
+       if (ret)
+               return ret;
+
+       ret = adp8870_write(client, ADP8870_BLFR, FADE_VAL(pdata->bl_fade_in,
+                       pdata->bl_fade_out));
+       if (ret)
+               return ret;
+       /*
+        * ADP8870 Rev0 requires GDWN_DIS bit set
+        */
+
+       ret = adp8870_set_bits(client, ADP8870_MDCR, BLEN | DIM_EN | NSTBY |
+                       (data->revid == 0 ? GDWN_DIS : 0));
+
+       return ret;
+}
+
+static ssize_t adp8870_show(struct device *dev, char *buf, int reg)
+{
+       struct adp8870_bl *data = dev_get_drvdata(dev);
+       int error;
+       uint8_t reg_val;
+
+       mutex_lock(&data->lock);
+       error = adp8870_read(data->client, reg, &reg_val);
+       mutex_unlock(&data->lock);
+
+       if (error < 0)
+               return error;
+
+       return sprintf(buf, "%u\n", reg_val);
+}
+
+static ssize_t adp8870_store(struct device *dev, const char *buf,
+                        size_t count, int reg)
+{
+       struct adp8870_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);
+       adp8870_write(data->client, reg, val);
+       mutex_unlock(&data->lock);
+
+       return count;
+}
+
+static ssize_t adp8870_bl_l5_dark_max_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLMX5);
+}
+
+static ssize_t adp8870_bl_l5_dark_max_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLMX5);
+}
+static DEVICE_ATTR(l5_dark_max, 0664, adp8870_bl_l5_dark_max_show,
+                       adp8870_bl_l5_dark_max_store);
+
+
+static ssize_t adp8870_bl_l4_indoor_max_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLMX4);
+}
+
+static ssize_t adp8870_bl_l4_indoor_max_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLMX4);
+}
+static DEVICE_ATTR(l4_indoor_max, 0664, adp8870_bl_l4_indoor_max_show,
+                       adp8870_bl_l4_indoor_max_store);
+
+
+static ssize_t adp8870_bl_l3_office_max_show(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLMX3);
+}
+
+static ssize_t adp8870_bl_l3_office_max_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLMX3);
+}
+
+static DEVICE_ATTR(l3_office_max, 0664, adp8870_bl_l3_office_max_show,
+                       adp8870_bl_l3_office_max_store);
+
+static ssize_t adp8870_bl_l2_bright_max_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLMX2);
+}
+
+static ssize_t adp8870_bl_l2_bright_max_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLMX2);
+}
+static DEVICE_ATTR(l2_bright_max, 0664, adp8870_bl_l2_bright_max_show,
+                       adp8870_bl_l2_bright_max_store);
+
+static ssize_t adp8870_bl_l1_daylight_max_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLMX1);
+}
+
+static ssize_t adp8870_bl_l1_daylight_max_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct adp8870_bl *data = dev_get_drvdata(dev);
+       int ret = strict_strtoul(buf, 10, &data->cached_daylight_max);
+       if (ret)
+               return ret;
+
+       return adp8870_store(dev, buf, count, ADP8870_BLMX1);
+}
+static DEVICE_ATTR(l1_daylight_max, 0664, adp8870_bl_l1_daylight_max_show,
+                       adp8870_bl_l1_daylight_max_store);
+
+static ssize_t adp8870_bl_l5_dark_dim_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLDM5);
+}
+
+static ssize_t adp8870_bl_l5_dark_dim_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLDM5);
+}
+static DEVICE_ATTR(l5_dark_dim, 0664, adp8870_bl_l5_dark_dim_show,
+                       adp8870_bl_l5_dark_dim_store);
+
+static ssize_t adp8870_bl_l4_indoor_dim_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLDM4);
+}
+
+static ssize_t adp8870_bl_l4_indoor_dim_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLDM4);
+}
+static DEVICE_ATTR(l4_indoor_dim, 0664, adp8870_bl_l4_indoor_dim_show,
+                       adp8870_bl_l4_indoor_dim_store);
+
+
+static ssize_t adp8870_bl_l3_office_dim_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLDM3);
+}
+
+static ssize_t adp8870_bl_l3_office_dim_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLDM3);
+}
+static DEVICE_ATTR(l3_office_dim, 0664, adp8870_bl_l3_office_dim_show,
+                       adp8870_bl_l3_office_dim_store);
+
+static ssize_t adp8870_bl_l2_bright_dim_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLDM2);
+}
+
+static ssize_t adp8870_bl_l2_bright_dim_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLDM2);
+}
+static DEVICE_ATTR(l2_bright_dim, 0664, adp8870_bl_l2_bright_dim_show,
+                       adp8870_bl_l2_bright_dim_store);
+
+static ssize_t adp8870_bl_l1_daylight_dim_show(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       return adp8870_show(dev, buf, ADP8870_BLDM1);
+}
+
+static ssize_t adp8870_bl_l1_daylight_dim_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       return adp8870_store(dev, buf, count, ADP8870_BLDM1);
+}
+static DEVICE_ATTR(l1_daylight_dim, 0664, adp8870_bl_l1_daylight_dim_show,
+                       adp8870_bl_l1_daylight_dim_store);
+
+#ifdef ADP8870_EXT_FEATURES
+static ssize_t adp8870_bl_ambient_light_level_show(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       struct adp8870_bl *data = dev_get_drvdata(dev);
+       int error;
+       uint8_t reg_val;
+       uint16_t ret_val;
+
+       mutex_lock(&data->lock);
+       error = adp8870_read(data->client, ADP8870_PH1LEVL, &reg_val);
+       if (error < 0) {
+               mutex_unlock(&data->lock);
+               return error;
+       }
+       ret_val = reg_val;
+       error = adp8870_read(data->client, ADP8870_PH1LEVH, &reg_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,
+               adp8870_bl_ambient_light_level_show, NULL);
+
+static ssize_t adp8870_bl_ambient_light_zone_show(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+       struct adp8870_bl *data = dev_get_drvdata(dev);
+       int error;
+       uint8_t reg_val;
+
+       mutex_lock(&data->lock);
+       error = adp8870_read(data->client, ADP8870_CFGR, &reg_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 adp8870_bl_ambient_light_zone_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       struct adp8870_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 */
+               adp8870_set_bits(data->client, ADP8870_MDCR, CMP_AUTOEN);
+       } else if ((val > 0) && (val < 6)) {
+               /* Disable automatic ambient light sensing */
+               adp8870_clr_bits(data->client, ADP8870_MDCR, CMP_AUTOEN);
+
+               /* Set user supplied ambient light zone */
+               mutex_lock(&data->lock);
+               adp8870_read(data->client, ADP8870_CFGR, &reg_val);
+               reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT);
+               reg_val |= (val - 1) << CFGR_BLV_SHIFT;
+               adp8870_write(data->client, ADP8870_CFGR, reg_val);
+               mutex_unlock(&data->lock);
+       }
+
+       return count;
+}
+static DEVICE_ATTR(ambient_light_zone, 0664,
+               adp8870_bl_ambient_light_zone_show,
+               adp8870_bl_ambient_light_zone_store);
+#endif
+
+static struct attribute *adp8870_bl_attributes[] = {
+       &dev_attr_l5_dark_max.attr,
+       &dev_attr_l5_dark_dim.attr,
+       &dev_attr_l4_indoor_max.attr,
+       &dev_attr_l4_indoor_dim.attr,
+       &dev_attr_l3_office_max.attr,
+       &dev_attr_l3_office_dim.attr,
+       &dev_attr_l2_bright_max.attr,
+       &dev_attr_l2_bright_dim.attr,
+       &dev_attr_l1_daylight_max.attr,
+       &dev_attr_l1_daylight_dim.attr,
+#ifdef ADP8870_EXT_FEATURES
+       &dev_attr_ambient_light_level.attr,
+       &dev_attr_ambient_light_zone.attr,
+#endif
+       NULL
+};
+
+static const struct attribute_group adp8870_bl_attr_group = {
+       .attrs = adp8870_bl_attributes,
+};
+
+static int __devinit adp8870_probe(struct i2c_client *client,
+                                       const struct i2c_device_id *id)
+{
+       struct backlight_properties props;
+       struct backlight_device *bl;
+       struct adp8870_bl *data;
+       struct adp8870_backlight_platform_data *pdata =
+               client->dev.platform_data;
+       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;
+       }
+
+       ret = adp8870_read(client, ADP8870_MFDVID, &reg_val);
+       if (ret < 0)
+               return -EIO;
+
+       if (ADP8870_MANID(reg_val) != ADP8870_MANUFID) {
+               dev_err(&client->dev, "failed to probe\n");
+               return -ENODEV;
+       }
+
+       data = kzalloc(sizeof(*data), GFP_KERNEL);
+       if (data == NULL)
+               return -ENOMEM;
+
+       data->revid = ADP8870_DEVID(reg_val);
+       data->client = client;
+       data->pdata = pdata;
+       data->id = id->driver_data;
+       data->current_brightness = 0;
+       i2c_set_clientdata(client, data);
+
+       mutex_init(&data->lock);
+
+       memset(&props, 0, sizeof(props));
+       props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS;
+       bl = backlight_device_register(dev_driver_string(&client->dev),
+                       &client->dev, data, &adp8870_bl_ops, &props);
+       if (IS_ERR(bl)) {
+               dev_err(&client->dev, "failed to register backlight\n");
+               ret = PTR_ERR(bl);
+               goto out2;
+       }
+
+       data->bl = bl;
+
+       if (pdata->en_ambl_sens)
+               ret = sysfs_create_group(&bl->dev.kobj,
+                       &adp8870_bl_attr_group);
+
+       if (ret) {
+               dev_err(&client->dev, "failed to register sysfs\n");
+               goto out1;
+       }
+
+       ret = adp8870_bl_setup(bl);
+       if (ret) {
+               ret = -EIO;
+               goto out;
+       }
+
+       backlight_update_status(bl);
+
+       dev_info(&client->dev, "Rev.%d Backlight\n", data->revid);
+
+       if (pdata->num_leds)
+               adp8870_led_probe(client);
+
+       return 0;
+
+out:
+       if (data->pdata->en_ambl_sens)
+               sysfs_remove_group(&data->bl->dev.kobj,
+                       &adp8870_bl_attr_group);
+out1:
+       backlight_device_unregister(bl);
+out2:
+       i2c_set_clientdata(client, NULL);
+       kfree(data);
+
+       return ret;
+}
+
+static int __devexit adp8870_remove(struct i2c_client *client)
+{
+       struct adp8870_bl *data = i2c_get_clientdata(client);
+
+       adp8870_clr_bits(client, ADP8870_MDCR, NSTBY);
+
+       if (data->led)
+               adp8870_led_remove(client);
+
+       if (data->pdata->en_ambl_sens)
+               sysfs_remove_group(&data->bl->dev.kobj,
+                       &adp8870_bl_attr_group);
+
+       backlight_device_unregister(data->bl);
+       i2c_set_clientdata(client, NULL);
+       kfree(data);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int adp8870_i2c_suspend(struct i2c_client *client, pm_message_t message)
+{
+       adp8870_clr_bits(client, ADP8870_MDCR, NSTBY);
+
+       return 0;
+}
+
+static int adp8870_i2c_resume(struct i2c_client *client)
+{
+       adp8870_set_bits(client, ADP8870_MDCR, NSTBY);
+
+       return 0;
+}
+#else
+#define adp8870_i2c_suspend NULL
+#define adp8870_i2c_resume NULL
+#endif
+
+static const struct i2c_device_id adp8870_id[] = {
+       { "adp8870", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, adp8870_id);
+
+static struct i2c_driver adp8870_driver = {
+       .driver = {
+               .name = KBUILD_MODNAME,
+       },
+       .probe    = adp8870_probe,
+       .remove   = __devexit_p(adp8870_remove),
+       .suspend = adp8870_i2c_suspend,
+       .resume  = adp8870_i2c_resume,
+       .id_table = adp8870_id,
+};
+
+static int __init adp8870_init(void)
+{
+       return i2c_add_driver(&adp8870_driver);
+}
+module_init(adp8870_init);
+
+static void __exit adp8870_exit(void)
+{
+       i2c_del_driver(&adp8870_driver);
+}
+module_exit(adp8870_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADP8870 Backlight driver");
+MODULE_ALIAS("platform:adp8870-backlight");
diff --git a/include/linux/i2c/adp8870.h b/include/linux/i2c/adp8870.h
new file mode 100644 (file)
index 0000000..624dcec
--- /dev/null
@@ -0,0 +1,153 @@
+/*
+ * Definitions and platform data for Analog Devices
+ * Backlight drivers ADP8870
+ *
+ * Copyright 2009-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __LINUX_I2C_ADP8870_H
+#define __LINUX_I2C_ADP8870_H
+
+#define ID_ADP8870             8870
+
+#define ADP8870_MAX_BRIGHTNESS 0x7F
+#define FLAG_OFFT_SHIFT 8
+
+/*
+ * LEDs subdevice platform data
+ */
+
+#define ADP8870_LED_DIS_BLINK  (0 << FLAG_OFFT_SHIFT)
+#define ADP8870_LED_OFFT_600ms (1 << FLAG_OFFT_SHIFT)
+#define ADP8870_LED_OFFT_1200ms        (2 << FLAG_OFFT_SHIFT)
+#define ADP8870_LED_OFFT_1800ms        (3 << FLAG_OFFT_SHIFT)
+
+#define ADP8870_LED_ONT_200ms  0
+#define ADP8870_LED_ONT_600ms  1
+#define ADP8870_LED_ONT_800ms  2
+#define ADP8870_LED_ONT_1200ms 3
+
+#define ADP8870_LED_D7         (7)
+#define ADP8870_LED_D6         (6)
+#define ADP8870_LED_D5         (5)
+#define ADP8870_LED_D4         (4)
+#define ADP8870_LED_D3         (3)
+#define ADP8870_LED_D2         (2)
+#define ADP8870_LED_D1         (1)
+
+/*
+ * Backlight subdevice platform data
+ */
+
+#define ADP8870_BL_D7          (1 << 6)
+#define ADP8870_BL_D6          (1 << 5)
+#define ADP8870_BL_D5          (1 << 4)
+#define ADP8870_BL_D4          (1 << 3)
+#define ADP8870_BL_D3          (1 << 2)
+#define ADP8870_BL_D2          (1 << 1)
+#define ADP8870_BL_D1          (1 << 0)
+
+#define ADP8870_FADE_T_DIS     0       /* Fade Timer Disabled */
+#define ADP8870_FADE_T_300ms   1       /* 0.3 Sec */
+#define ADP8870_FADE_T_600ms   2
+#define ADP8870_FADE_T_900ms   3
+#define ADP8870_FADE_T_1200ms  4
+#define ADP8870_FADE_T_1500ms  5
+#define ADP8870_FADE_T_1800ms  6
+#define ADP8870_FADE_T_2100ms  7
+#define ADP8870_FADE_T_2400ms  8
+#define ADP8870_FADE_T_2700ms  9
+#define ADP8870_FADE_T_3000ms  10
+#define ADP8870_FADE_T_3500ms  11
+#define ADP8870_FADE_T_4000ms  12
+#define ADP8870_FADE_T_4500ms  13
+#define ADP8870_FADE_T_5000ms  14
+#define ADP8870_FADE_T_5500ms  15      /* 5.5 Sec */
+
+#define ADP8870_FADE_LAW_LINEAR        0
+#define ADP8870_FADE_LAW_SQUARE        1
+#define ADP8870_FADE_LAW_CUBIC1        2
+#define ADP8870_FADE_LAW_CUBIC2        3
+
+#define ADP8870_BL_AMBL_FILT_80ms      0       /* Light sensor filter time */
+#define ADP8870_BL_AMBL_FILT_160ms     1
+#define ADP8870_BL_AMBL_FILT_320ms     2
+#define ADP8870_BL_AMBL_FILT_640ms     3
+#define ADP8870_BL_AMBL_FILT_1280ms    4
+#define ADP8870_BL_AMBL_FILT_2560ms    5
+#define ADP8870_BL_AMBL_FILT_5120ms    6
+#define ADP8870_BL_AMBL_FILT_10240ms   7       /* 10.24 sec */
+
+/*
+ * Blacklight current 0..30mA
+ */
+#define ADP8870_BL_CUR_mA(I)           ((I * 127) / 30)
+
+/*
+ * L2 comparator current 0..1106uA
+ */
+#define ADP8870_L2_COMP_CURR_uA(I)     ((I * 255) / 1106)
+
+/*
+ * L3 comparator current 0..551uA
+ */
+#define ADP8870_L3_COMP_CURR_uA(I)     ((I * 255) / 551)
+
+/*
+ * L4 comparator current 0..275uA
+ */
+#define ADP8870_L4_COMP_CURR_uA(I)     ((I * 255) / 275)
+
+/*
+ * L5 comparator current 0..138uA
+ */
+#define ADP8870_L5_COMP_CURR_uA(I)     ((I * 255) / 138)
+
+struct adp8870_backlight_platform_data {
+       u8 bl_led_assign;       /* 1 = Backlight 0 = Individual LED */
+       u8 pwm_assign;          /* 1 = Enables PWM mode */
+
+       u8 bl_fade_in;          /* Backlight Fade-In Timer */
+       u8 bl_fade_out;         /* Backlight Fade-Out Timer */
+       u8 bl_fade_law;         /* fade-on/fade-off transfer characteristic */
+
+       u8 en_ambl_sens;        /* 1 = enable ambient light sensor */
+       u8 abml_filt;           /* Light sensor filter time */
+
+       u8 l1_daylight_max;     /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l1_daylight_dim;     /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l2_bright_max;       /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l2_bright_dim;       /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l3_office_max;       /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l3_office_dim;       /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l4_indoor_max;       /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l4_indor_dim;        /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l5_dark_max;         /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+       u8 l5_dark_dim;         /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+
+       u8 l2_trip;             /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+       u8 l2_hyst;             /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+       u8 l3_trip;             /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+       u8 l3_hyst;             /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+       u8 l4_trip;             /* use L4_COMP_CURR_uA(I) 0 <= I <= 275 uA */
+       u8 l4_hyst;             /* use L4_COMP_CURR_uA(I) 0 <= I <= 275 uA */
+       u8 l5_trip;             /* use L5_COMP_CURR_uA(I) 0 <= I <= 138 uA */
+       u8 l5_hyst;             /* use L6_COMP_CURR_uA(I) 0 <= I <= 138 uA */
+
+       /**
+        * Independent Current Sinks / LEDS
+        * Sinks not assigned to the Backlight can be exposed to
+        * user space using the LEDS CLASS interface
+        */
+
+       int num_leds;
+       struct led_info *leds;
+       u8 led_fade_in;         /* LED Fade-In Timer */
+       u8 led_fade_out;        /* LED Fade-Out Timer */
+       u8 led_fade_law;        /* fade-on/fade-off transfer characteristic */
+       u8 led_on_time;
+};
+
+#endif /* __LINUX_I2C_ADP8870_H */