Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight:
  backlight: new driver for ADP5520/ADP5501 MFD PMICs
  backlight: extend event support to also support poll()
  backlight/eeepc-laptop: Update the backlight state when we change brightness
  backlight/acpi: Update the backlight state when we change brightness
  backlight: Allow drivers to update the core, and generate events on changes
  backlight: switch to da903x driver to dev_pm_ops
  backlight: Add support for the Avionic Design Xanthos backlight device.
  backlight: spi driver for LMS283GF05 LCD
  backlight: move hp680-bl's probe function to .devinit.text
  backlight: Add support for new Apple machines.
  backlight: mbp_nvidia_bl: add support for MacBookAir 1,1
  backlight: Add WM831x backlight driver

Trivial conflicts due to '#ifdef CONFIG_PM' differences in
drivers/video/backlight/da903x_bl.c

9 files changed, 1163 insertions, 1 deletions

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 90861cd93165..09bfa9662e4d 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -31,6 +31,13 @@ config LCD_CORGI
           Say y here to support the LCD panels usually found on SHARP
           corgi (C7x0) and spitz (Cxx00) models.
 
+config LCD_LMS283GF05
+        tristate "Samsung LMS283GF05 LCD"
+        depends on LCD_CLASS_DEVICE && SPI_MASTER && GENERIC_GPIO
+        help
+          SPI driver for Samsung LMS283GF05. This provides basic support
+          for powering the LCD up/down through a sysfs interface.
+
 config LCD_LTV350QV
         tristate "Samsung LTV350QV LCD Panel"
         depends on LCD_CLASS_DEVICE && SPI_MASTER
@@ -229,3 +236,29 @@ config BACKLIGHT_SAHARA
         help
           If you have a Tabletkiosk Sahara Touch-iT, say y to enable the
           backlight driver.
+
+config BACKLIGHT_WM831X
+        tristate "WM831x PMIC Backlight Driver"
+        depends on BACKLIGHT_CLASS_DEVICE && MFD_WM831X
+        help
+          If you have a backlight driven by the ISINK and DCDC of a
+          WM831x PMIC say y to enable the backlight driver for it.
+
+config BACKLIGHT_ADX
+        tristate "Avionic Design Xanthos Backlight Driver"
+        depends on BACKLIGHT_CLASS_DEVICE && ARCH_PXA_ADX
+        default y
+        help
+          Say Y to enable the backlight driver on Avionic Design Xanthos-based
+          boards.
+
+config BACKLIGHT_ADP5520
+        tristate "Backlight Driver for ADP5520/ADP5501 using WLED"
+        depends on BACKLIGHT_CLASS_DEVICE && PMIC_ADP5520
+        help
+          If you have a LCD backlight connected to the BST/BL_SNK output of
+          ADP5520 or ADP5501, say Y here to enable this driver.
+
+          To compile this driver as a module, choose M here: the module will
+          be called adp5520_bl.
+
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 4eb178c1d684..9a405548874c 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -3,6 +3,7 @@
 obj-$(CONFIG_LCD_CLASS_DEVICE)     += lcd.o
 obj-$(CONFIG_LCD_CORGI)            += corgi_lcd.o
 obj-$(CONFIG_LCD_HP700)            += jornada720_lcd.o
+obj-$(CONFIG_LCD_LMS283GF05)       += lms283gf05.o
 obj-$(CONFIG_LCD_LTV350QV)         += ltv350qv.o
 obj-$(CONFIG_LCD_ILI9320)          += ili9320.o
 obj-$(CONFIG_LCD_PLATFORM)         += platform_lcd.o
@@ -24,4 +25,7 @@ obj-$(CONFIG_BACKLIGHT_DA903X)	+= da903x_bl.o
 obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o
 obj-$(CONFIG_BACKLIGHT_TOSA)    += tosa_bl.o
 obj-$(CONFIG_BACKLIGHT_SAHARA)  += kb3886_bl.o
+obj-$(CONFIG_BACKLIGHT_WM831X)  += wm831x_bl.o
+obj-$(CONFIG_BACKLIGHT_ADX)    += adx_bl.o
+obj-$(CONFIG_BACKLIGHT_ADP5520) += adp5520_bl.o
 
diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
new file mode 100644
index 000000000000..ad05da5ba3c7
--- /dev/null
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -0,0 +1,377 @@
+/*
+ * Backlight driver for Analog Devices ADP5520/ADP5501 MFD PMICs
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/mfd/adp5520.h>
+
+struct adp5520_bl {
+        struct device *master;
+        struct adp5520_backlight_platfrom_data *pdata;
+        struct mutex lock;
+        unsigned long cached_daylight_max;
+        int id;
+        int current_brightness;
+};
+
+static int adp5520_bl_set(struct backlight_device *bl, int brightness)
+{
+        struct adp5520_bl *data = bl_get_data(bl);
+        struct device *master = data->master;
+        int ret = 0;
+
+        if (data->pdata->en_ambl_sens) {
+                if ((brightness > 0) && (brightness < ADP5020_MAX_BRIGHTNESS)) {
+                        /* Disable Ambient Light auto adjust */
+                        ret |= adp5520_clr_bits(master, BL_CONTROL,
+                                        BL_AUTO_ADJ);
+                        ret |= adp5520_write(master, DAYLIGHT_MAX, brightness);
+                } else {
+                        /*
+                         * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust
+                         * restore daylight l3 sysfs brightness
+                         */
+                        ret |= adp5520_write(master, DAYLIGHT_MAX,
+                                         data->cached_daylight_max);
+                        ret |= adp5520_set_bits(master, BL_CONTROL,
+                                         BL_AUTO_ADJ);
+                }
+        } else {
+                ret |= adp5520_write(master, DAYLIGHT_MAX, brightness);
+        }
+
+        if (data->current_brightness && brightness == 0)
+                ret |= adp5520_set_bits(master,
+                                MODE_STATUS, DIM_EN);
+        else if (data->current_brightness == 0 && brightness)
+                ret |= adp5520_clr_bits(master,
+                                MODE_STATUS, DIM_EN);
+
+        if (!ret)
+                data->current_brightness = brightness;
+
+        return ret;
+}
+
+static int adp5520_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 adp5520_bl_set(bl, brightness);
+}
+
+static int adp5520_bl_get_brightness(struct backlight_device *bl)
+{
+        struct adp5520_bl *data = bl_get_data(bl);
+        int error;
+        uint8_t reg_val;
+
+        error = adp5520_read(data->master, BL_VALUE, &reg_val);
+
+        return error ? data->current_brightness : reg_val;
+}
+
+static struct backlight_ops adp5520_bl_ops = {
+        .update_status  = adp5520_bl_update_status,
+        .get_brightness = adp5520_bl_get_brightness,
+};
+
+static int adp5520_bl_setup(struct backlight_device *bl)
+{
+        struct adp5520_bl *data = bl_get_data(bl);
+        struct device *master = data->master;
+        struct adp5520_backlight_platfrom_data *pdata = data->pdata;
+        int ret = 0;
+
+        ret |= adp5520_write(master, DAYLIGHT_MAX, pdata->l1_daylight_max);
+        ret |= adp5520_write(master, DAYLIGHT_DIM, pdata->l1_daylight_dim);
+
+        if (pdata->en_ambl_sens) {
+                data->cached_daylight_max = pdata->l1_daylight_max;
+                ret |= adp5520_write(master, OFFICE_MAX, pdata->l2_office_max);
+                ret |= adp5520_write(master, OFFICE_DIM, pdata->l2_office_dim);
+                ret |= adp5520_write(master, DARK_MAX, pdata->l3_dark_max);
+                ret |= adp5520_write(master, DARK_DIM, pdata->l3_dark_dim);
+                ret |= adp5520_write(master, L2_TRIP, pdata->l2_trip);
+                ret |= adp5520_write(master, L2_HYS, pdata->l2_hyst);
+                ret |= adp5520_write(master, L3_TRIP, pdata->l3_trip);
+                ret |= adp5520_write(master, L3_HYS, pdata->l3_hyst);
+                ret |= adp5520_write(master, ALS_CMPR_CFG,
+                        ALS_CMPR_CFG_VAL(pdata->abml_filt, L3_EN));
+        }
+
+        ret |= adp5520_write(master, BL_CONTROL,
+                        BL_CTRL_VAL(pdata->fade_led_law, pdata->en_ambl_sens));
+
+        ret |= adp5520_write(master, BL_FADE, FADE_VAL(pdata->fade_in,
+                        pdata->fade_out));
+
+        ret |= adp5520_set_bits(master, MODE_STATUS, BL_EN | DIM_EN);
+
+        return ret;
+}
+
+static ssize_t adp5520_show(struct device *dev, char *buf, int reg)
+{
+        struct adp5520_bl *data = dev_get_drvdata(dev);
+        int error;
+        uint8_t reg_val;
+
+        mutex_lock(&data->lock);
+        error = adp5520_read(data->master, reg, &reg_val);
+        mutex_unlock(&data->lock);
+
+        return sprintf(buf, "%u\n", reg_val);
+}
+
+static ssize_t adp5520_store(struct device *dev, const char *buf,
+                         size_t count, int reg)
+{
+        struct adp5520_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);
+        adp5520_write(data->master, reg, val);
+        mutex_unlock(&data->lock);
+
+        return count;
+}
+
+static ssize_t adp5520_bl_dark_max_show(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, DARK_MAX);
+}
+
+static ssize_t adp5520_bl_dark_max_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t count)
+{
+        return adp5520_store(dev, buf, count, DARK_MAX);
+}
+static DEVICE_ATTR(dark_max, 0664, adp5520_bl_dark_max_show,
+                        adp5520_bl_dark_max_store);
+
+static ssize_t adp5520_bl_office_max_show(struct device *dev,
+                                     struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, OFFICE_MAX);
+}
+
+static ssize_t adp5520_bl_office_max_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t count)
+{
+        return adp5520_store(dev, buf, count, OFFICE_MAX);
+}
+static DEVICE_ATTR(office_max, 0664, adp5520_bl_office_max_show,
+                        adp5520_bl_office_max_store);
+
+static ssize_t adp5520_bl_daylight_max_show(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, DAYLIGHT_MAX);
+}
+
+static ssize_t adp5520_bl_daylight_max_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct adp5520_bl *data = dev_get_drvdata(dev);
+
+        strict_strtoul(buf, 10, &data->cached_daylight_max);
+        return adp5520_store(dev, buf, count, DAYLIGHT_MAX);
+}
+static DEVICE_ATTR(daylight_max, 0664, adp5520_bl_daylight_max_show,
+                        adp5520_bl_daylight_max_store);
+
+static ssize_t adp5520_bl_dark_dim_show(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, DARK_DIM);
+}
+
+static ssize_t adp5520_bl_dark_dim_store(struct device *dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+        return adp5520_store(dev, buf, count, DARK_DIM);
+}
+static DEVICE_ATTR(dark_dim, 0664, adp5520_bl_dark_dim_show,
+                        adp5520_bl_dark_dim_store);
+
+static ssize_t adp5520_bl_office_dim_show(struct device *dev,
+                        struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, OFFICE_DIM);
+}
+
+static ssize_t adp5520_bl_office_dim_store(struct device *dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+        return adp5520_store(dev, buf, count, OFFICE_DIM);
+}
+static DEVICE_ATTR(office_dim, 0664, adp5520_bl_office_dim_show,
+                        adp5520_bl_office_dim_store);
+
+static ssize_t adp5520_bl_daylight_dim_show(struct device *dev,
+                                     struct device_attribute *attr, char *buf)
+{
+        return adp5520_show(dev, buf, DAYLIGHT_DIM);
+}
+
+static ssize_t adp5520_bl_daylight_dim_store(struct device *dev,
+                                     struct device_attribute *attr,
+                                     const char *buf, size_t count)
+{
+        return adp5520_store(dev, buf, count, DAYLIGHT_DIM);
+}
+static DEVICE_ATTR(daylight_dim, 0664, adp5520_bl_daylight_dim_show,
+                        adp5520_bl_daylight_dim_store);
+
+static struct attribute *adp5520_bl_attributes[] = {
+        &dev_attr_dark_max.attr,
+        &dev_attr_dark_dim.attr,
+        &dev_attr_office_max.attr,
+        &dev_attr_office_dim.attr,
+        &dev_attr_daylight_max.attr,
+        &dev_attr_daylight_dim.attr,
+        NULL
+};
+
+static const struct attribute_group adp5520_bl_attr_group = {
+        .attrs = adp5520_bl_attributes,
+};
+
+static int __devinit adp5520_bl_probe(struct platform_device *pdev)
+{
+        struct backlight_device *bl;
+        struct adp5520_bl *data;
+        int ret = 0;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data == NULL)
+                return -ENOMEM;
+
+        data->master = pdev->dev.parent;
+        data->pdata = pdev->dev.platform_data;
+
+        if (data->pdata  == NULL) {
+                dev_err(&pdev->dev, "missing platform data\n");
+                kfree(data);
+                return -ENODEV;
+        }
+
+        data->id = pdev->id;
+        data->current_brightness = 0;
+
+        mutex_init(&data->lock);
+
+        bl = backlight_device_register(pdev->name, data->master,
+                        data, &adp5520_bl_ops);
+        if (IS_ERR(bl)) {
+                dev_err(&pdev->dev, "failed to register backlight\n");
+                kfree(data);
+                return PTR_ERR(bl);
+        }
+
+        bl->props.max_brightness =
+                bl->props.brightness = ADP5020_MAX_BRIGHTNESS;
+
+        if (data->pdata->en_ambl_sens)
+                ret = sysfs_create_group(&bl->dev.kobj,
+                        &adp5520_bl_attr_group);
+
+        if (ret) {
+                dev_err(&pdev->dev, "failed to register sysfs\n");
+                backlight_device_unregister(bl);
+                kfree(data);
+        }
+
+        platform_set_drvdata(pdev, bl);
+        ret |= adp5520_bl_setup(bl);
+        backlight_update_status(bl);
+
+        return ret;
+}
+
+static int __devexit adp5520_bl_remove(struct platform_device *pdev)
+{
+        struct backlight_device *bl = platform_get_drvdata(pdev);
+        struct adp5520_bl *data = bl_get_data(bl);
+
+        adp5520_clr_bits(data->master, MODE_STATUS, BL_EN);
+
+        if (data->pdata->en_ambl_sens)
+                sysfs_remove_group(&bl->dev.kobj,
+                                &adp5520_bl_attr_group);
+
+        backlight_device_unregister(bl);
+        kfree(data);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int adp5520_bl_suspend(struct platform_device *pdev,
+                                 pm_message_t state)
+{
+        struct backlight_device *bl = platform_get_drvdata(pdev);
+        return adp5520_bl_set(bl, 0);
+}
+
+static int adp5520_bl_resume(struct platform_device *pdev)
+{
+        struct backlight_device *bl = platform_get_drvdata(pdev);
+
+        backlight_update_status(bl);
+        return 0;
+}
+#else
+#define adp5520_bl_suspend      NULL
+#define adp5520_bl_resume       NULL
+#endif
+
+static struct platform_driver adp5520_bl_driver = {
+        .driver         = {
+                .name   = "adp5520-backlight",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = adp5520_bl_probe,
+        .remove         = __devexit_p(adp5520_bl_remove),
+        .suspend        = adp5520_bl_suspend,
+        .resume         = adp5520_bl_resume,
+};
+
+static int __init adp5520_bl_init(void)
+{
+        return platform_driver_register(&adp5520_bl_driver);
+}
+module_init(adp5520_bl_init);
+
+static void __exit adp5520_bl_exit(void)
+{
+        platform_driver_unregister(&adp5520_bl_driver);
+}
+module_exit(adp5520_bl_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADP5520(01) Backlight Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:adp5520-backlight");
diff --git a/drivers/video/backlight/adx_bl.c b/drivers/video/backlight/adx_bl.c
new file mode 100644
index 000000000000..2c3bdfc620b7
--- /dev/null
+++ b/drivers/video/backlight/adx_bl.c
@@ -0,0 +1,178 @@
+/*
+ * linux/drivers/video/backlight/adx.c
+ *
+ * Copyright (C) 2009 Avionic Design GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Written by Thierry Reding <thierry.reding@avionic-design.de>
+ */
+
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+/* register definitions */
+#define ADX_BACKLIGHT_CONTROL           0x00
+#define ADX_BACKLIGHT_CONTROL_ENABLE    (1 << 0)
+#define ADX_BACKLIGHT_BRIGHTNESS        0x08
+#define ADX_BACKLIGHT_STATUS            0x10
+#define ADX_BACKLIGHT_ERROR             0x18
+
+struct adxbl {
+        void __iomem *base;
+};
+
+static int adx_backlight_update_status(struct backlight_device *bldev)
+{
+        struct adxbl *bl = bl_get_data(bldev);
+        u32 value;
+
+        value = bldev->props.brightness;
+        writel(value, bl->base + ADX_BACKLIGHT_BRIGHTNESS);
+
+        value = readl(bl->base + ADX_BACKLIGHT_CONTROL);
+
+        if (bldev->props.state & BL_CORE_FBBLANK)
+                value &= ~ADX_BACKLIGHT_CONTROL_ENABLE;
+        else
+                value |= ADX_BACKLIGHT_CONTROL_ENABLE;
+
+        writel(value, bl->base + ADX_BACKLIGHT_CONTROL);
+
+        return 0;
+}
+
+static int adx_backlight_get_brightness(struct backlight_device *bldev)
+{
+        struct adxbl *bl = bl_get_data(bldev);
+        u32 brightness;
+
+        brightness = readl(bl->base + ADX_BACKLIGHT_BRIGHTNESS);
+        return brightness & 0xff;
+}
+
+static int adx_backlight_check_fb(struct fb_info *fb)
+{
+        return 1;
+}
+
+static struct backlight_ops adx_backlight_ops = {
+        .options = 0,
+        .update_status = adx_backlight_update_status,
+        .get_brightness = adx_backlight_get_brightness,
+        .check_fb = adx_backlight_check_fb,
+};
+
+static int __devinit adx_backlight_probe(struct platform_device *pdev)
+{
+        struct backlight_device *bldev;
+        struct resource *res;
+        struct adxbl *bl;
+        int ret = 0;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                ret = -ENXIO;
+                goto out;
+        }
+
+        res = devm_request_mem_region(&pdev->dev, res->start,
+                        resource_size(res), res->name);
+        if (!res) {
+                ret = -ENXIO;
+                goto out;
+        }
+
+        bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);
+        if (!bl) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        bl->base = devm_ioremap_nocache(&pdev->dev, res->start,
+                        resource_size(res));
+        if (!bl->base) {
+                ret = -ENXIO;
+                goto out;
+        }
+
+        bldev = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, bl,
+                        &adx_backlight_ops);
+        if (!bldev) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        bldev->props.max_brightness = 0xff;
+        bldev->props.brightness = 0xff;
+        bldev->props.power = FB_BLANK_UNBLANK;
+
+        platform_set_drvdata(pdev, bldev);
+
+out:
+        return ret;
+}
+
+static int __devexit adx_backlight_remove(struct platform_device *pdev)
+{
+        struct backlight_device *bldev;
+        int ret = 0;
+
+        bldev = platform_get_drvdata(pdev);
+        bldev->props.power = FB_BLANK_UNBLANK;
+        bldev->props.brightness = 0xff;
+        backlight_update_status(bldev);
+        backlight_device_unregister(bldev);
+        platform_set_drvdata(pdev, NULL);
+
+        return ret;
+}
+
+#ifdef CONFIG_PM
+static int adx_backlight_suspend(struct platform_device *pdev,
+                pm_message_t state)
+{
+        return 0;
+}
+
+static int adx_backlight_resume(struct platform_device *pdev)
+{
+        return 0;
+}
+#else
+#define adx_backlight_suspend NULL
+#define adx_backlight_resume NULL
+#endif
+
+static struct platform_driver adx_backlight_driver = {
+        .probe = adx_backlight_probe,
+        .remove = __devexit_p(adx_backlight_remove),
+        .suspend = adx_backlight_suspend,
+        .resume = adx_backlight_resume,
+        .driver = {
+                .name = "adx-backlight",
+                .owner = THIS_MODULE,
+        },
+};
+
+static int __init adx_backlight_init(void)
+{
+        return platform_driver_register(&adx_backlight_driver);
+}
+
+static void __exit adx_backlight_exit(void)
+{
+        platform_driver_unregister(&adx_backlight_driver);
+}
+
+module_init(adx_backlight_init);
+module_exit(adx_backlight_exit);
+
+MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
+MODULE_DESCRIPTION("Avionic Design Xanthos Backlight Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 157057c79ca3..6615ac7fa60a 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -73,6 +73,27 @@ static inline void backlight_unregister_fb(struct backlight_device *bd)
 }
 #endif /* CONFIG_FB */
 
+static void backlight_generate_event(struct backlight_device *bd,
+                                     enum backlight_update_reason reason)
+{
+        char *envp[2];
+
+        switch (reason) {
+        case BACKLIGHT_UPDATE_SYSFS:
+                envp[0] = "SOURCE=sysfs";
+                break;
+        case BACKLIGHT_UPDATE_HOTKEY:
+                envp[0] = "SOURCE=hotkey";
+                break;
+        default:
+                envp[0] = "SOURCE=unknown";
+                break;
+        }
+        envp[1] = NULL;
+        kobject_uevent_env(&bd->dev.kobj, KOBJ_CHANGE, envp);
+        sysfs_notify(&bd->dev.kobj, NULL, "actual_brightness");
+}
+
 static ssize_t backlight_show_power(struct device *dev,
                 struct device_attribute *attr,char *buf)
 {
@@ -142,6 +163,8 @@ static ssize_t backlight_store_brightness(struct device *dev,
         }
         mutex_unlock(&bd->ops_lock);
 
+        backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS);
+
         return rc;
 }
 
@@ -214,6 +237,25 @@ static struct device_attribute bl_device_attributes[] = {
 };
 
 /**
+ * backlight_force_update - tell the backlight subsystem that hardware state
+ *   has changed
+ * @bd: the backlight device to update
+ *
+ * Updates the internal state of the backlight in response to a hardware event,
+ * and generate a uevent to notify userspace
+ */
+void backlight_force_update(struct backlight_device *bd,
+                            enum backlight_update_reason reason)
+{
+        mutex_lock(&bd->ops_lock);
+        if (bd->ops && bd->ops->get_brightness)
+                bd->props.brightness = bd->ops->get_brightness(bd);
+        mutex_unlock(&bd->ops_lock);
+        backlight_generate_event(bd, reason);
+}
+EXPORT_SYMBOL(backlight_force_update);
+
+/**
  * backlight_device_register - create and register a new object of
  *   backlight_device class.
  * @name: the name of the new object(must be the same as the name of the
diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c
index 5be55a20d8c7..7fb4eefff80d 100644
--- a/drivers/video/backlight/hp680_bl.c
+++ b/drivers/video/backlight/hp680_bl.c
@@ -103,7 +103,7 @@ static struct backlight_ops hp680bl_ops = {
         .update_status  = hp680bl_set_intensity,
 };
 
-static int __init hp680bl_probe(struct platform_device *pdev)
+static int __devinit hp680bl_probe(struct platform_device *pdev)
 {
         struct backlight_device *bd;
 
diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c
new file mode 100644
index 000000000000..447b542a20ca
--- /dev/null
+++ b/drivers/video/backlight/lms283gf05.c
@@ -0,0 +1,242 @@
+/*
+ * lms283gf05.c -- support for Samsung LMS283GF05 LCD
+ *
+ * Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/lcd.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/lms283gf05.h>
+
+struct lms283gf05_state {
+        struct spi_device       *spi;
+        struct lcd_device       *ld;
+};
+
+struct lms283gf05_seq {
+        unsigned char           reg;
+        unsigned short          value;
+        unsigned char           delay;
+};
+
+/* Magic sequences supplied by manufacturer, for details refer to datasheet */
+static struct lms283gf05_seq disp_initseq[] = {
+        /* REG, VALUE, DELAY */
+        { 0x07, 0x0000, 0 },
+        { 0x13, 0x0000, 10 },
+
+        { 0x11, 0x3004, 0 },
+        { 0x14, 0x200F, 0 },
+        { 0x10, 0x1a20, 0 },
+        { 0x13, 0x0040, 50 },
+
+        { 0x13, 0x0060, 0 },
+        { 0x13, 0x0070, 200 },
+
+        { 0x01, 0x0127, 0 },
+        { 0x02, 0x0700, 0 },
+        { 0x03, 0x1030, 0 },
+        { 0x08, 0x0208, 0 },
+        { 0x0B, 0x0620, 0 },
+        { 0x0C, 0x0110, 0 },
+        { 0x30, 0x0120, 0 },
+        { 0x31, 0x0127, 0 },
+        { 0x32, 0x0000, 0 },
+        { 0x33, 0x0503, 0 },
+        { 0x34, 0x0727, 0 },
+        { 0x35, 0x0124, 0 },
+        { 0x36, 0x0706, 0 },
+        { 0x37, 0x0701, 0 },
+        { 0x38, 0x0F00, 0 },
+        { 0x39, 0x0F00, 0 },
+        { 0x40, 0x0000, 0 },
+        { 0x41, 0x0000, 0 },
+        { 0x42, 0x013f, 0 },
+        { 0x43, 0x0000, 0 },
+        { 0x44, 0x013f, 0 },
+        { 0x45, 0x0000, 0 },
+        { 0x46, 0xef00, 0 },
+        { 0x47, 0x013f, 0 },
+        { 0x48, 0x0000, 0 },
+        { 0x07, 0x0015, 30 },
+
+        { 0x07, 0x0017, 0 },
+
+        { 0x20, 0x0000, 0 },
+        { 0x21, 0x0000, 0 },
+        { 0x22, 0x0000, 0 }
+};
+
+static struct lms283gf05_seq disp_pdwnseq[] = {
+        { 0x07, 0x0016, 30 },
+
+        { 0x07, 0x0004, 0 },
+        { 0x10, 0x0220, 20 },
+
+        { 0x13, 0x0060, 50 },
+
+        { 0x13, 0x0040, 50 },
+
+        { 0x13, 0x0000, 0 },
+        { 0x10, 0x0000, 0 }
+};
+
+
+static void lms283gf05_reset(unsigned long gpio, bool inverted)
+{
+        gpio_set_value(gpio, !inverted);
+        mdelay(100);
+        gpio_set_value(gpio, inverted);
+        mdelay(20);
+        gpio_set_value(gpio, !inverted);
+        mdelay(20);
+}
+
+static void lms283gf05_toggle(struct spi_device *spi,
+                        struct lms283gf05_seq *seq, int sz)
+{
+        char buf[3];
+        int i;
+
+        for (i = 0; i < sz; i++) {
+                buf[0] = 0x74;
+                buf[1] = 0x00;
+                buf[2] = seq[i].reg;
+                spi_write(spi, buf, 3);
+
+                buf[0] = 0x76;
+                buf[1] = seq[i].value >> 8;
+                buf[2] = seq[i].value & 0xff;
+                spi_write(spi, buf, 3);
+
+                mdelay(seq[i].delay);
+        }
+}
+
+static int lms283gf05_power_set(struct lcd_device *ld, int power)
+{
+        struct lms283gf05_state *st = lcd_get_data(ld);
+        struct spi_device *spi = st->spi;
+        struct lms283gf05_pdata *pdata = spi->dev.platform_data;
+
+        if (power) {
+                if (pdata)
+                        lms283gf05_reset(pdata->reset_gpio,
+                                        pdata->reset_inverted);
+                lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
+        } else {
+                lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq));
+                if (pdata)
+                        gpio_set_value(pdata->reset_gpio,
+                                        pdata->reset_inverted);
+        }
+
+        return 0;
+}
+
+static struct lcd_ops lms_ops = {
+        .set_power      = lms283gf05_power_set,
+        .get_power      = NULL,
+};
+
+static int __devinit lms283gf05_probe(struct spi_device *spi)
+{
+        struct lms283gf05_state *st;
+        struct lms283gf05_pdata *pdata = spi->dev.platform_data;
+        struct lcd_device *ld;
+        int ret = 0;
+
+        if (pdata != NULL) {
+                ret = gpio_request(pdata->reset_gpio, "LMS285GF05 RESET");
+                if (ret)
+                        return ret;
+
+                ret = gpio_direction_output(pdata->reset_gpio,
+                                                !pdata->reset_inverted);
+                if (ret)
+                        goto err;
+        }
+
+        st = kzalloc(sizeof(struct lms283gf05_state), GFP_KERNEL);
+        if (st == NULL) {
+                dev_err(&spi->dev, "No memory for device state\n");
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        ld = lcd_device_register("lms283gf05", &spi->dev, st, &lms_ops);
+        if (IS_ERR(ld)) {
+                ret = PTR_ERR(ld);
+                goto err2;
+        }
+
+        st->spi = spi;
+        st->ld = ld;
+
+        dev_set_drvdata(&spi->dev, st);
+
+        /* kick in the LCD */
+        if (pdata)
+                lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
+        lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
+
+        return 0;
+
+err2:
+        kfree(st);
+err:
+        if (pdata != NULL)
+                gpio_free(pdata->reset_gpio);
+
+        return ret;
+}
+
+static int __devexit lms283gf05_remove(struct spi_device *spi)
+{
+        struct lms283gf05_state *st = dev_get_drvdata(&spi->dev);
+        struct lms283gf05_pdata *pdata = st->spi->dev.platform_data;
+
+        lcd_device_unregister(st->ld);
+
+        if (pdata != NULL)
+                gpio_free(pdata->reset_gpio);
+
+        kfree(st);
+
+        return 0;
+}
+
+static struct spi_driver lms283gf05_driver = {
+        .driver = {
+                .name   = "lms283gf05",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = lms283gf05_probe,
+        .remove         = __devexit_p(lms283gf05_remove),
+};
+
+static __init int lms283gf05_init(void)
+{
+        return spi_register_driver(&lms283gf05_driver);
+}
+
+static __exit void lms283gf05_exit(void)
+{
+        spi_unregister_driver(&lms283gf05_driver);
+}
+
+module_init(lms283gf05_init);
+module_exit(lms283gf05_exit);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("LCD283GF05 LCD");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c
index 3bb4c0a50c62..9edb8d7c295f 100644
--- a/drivers/video/backlight/mbp_nvidia_bl.c
+++ b/drivers/video/backlight/mbp_nvidia_bl.c
@@ -166,6 +166,15 @@ static const struct dmi_system_id __initdata mbp_device_table[] = {
         },
         {
                 .callback       = mbp_dmi_match,
+                .ident          = "MacBookAir 1,1",
+                .matches        = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir1,1"),
+                },
+                .driver_data    = (void *)&intel_chipset_data,
+        },
+        {
+                .callback       = mbp_dmi_match,
                 .ident          = "MacBook 5,1",
                 .matches        = {
                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
@@ -175,6 +184,15 @@ static const struct dmi_system_id __initdata mbp_device_table[] = {
         },
         {
                 .callback       = mbp_dmi_match,
+                .ident          = "MacBook 5,2",
+                .matches        = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,2"),
+                },
+                .driver_data    = (void *)&nvidia_chipset_data,
+        },
+        {
+                .callback       = mbp_dmi_match,
                 .ident          = "MacBookAir 2,1",
                 .matches        = {
                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
@@ -191,6 +209,24 @@ static const struct dmi_system_id __initdata mbp_device_table[] = {
                 },
                 .driver_data    = (void *)&nvidia_chipset_data,
         },
+        {
+                .callback       = mbp_dmi_match,
+                .ident          = "MacBookPro 5,2",
+                .matches        = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,2"),
+                },
+                .driver_data    = (void *)&nvidia_chipset_data,
+        },
+        {
+                .callback       = mbp_dmi_match,
+                .ident          = "MacBookPro 5,5",
+                .matches        = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro5,5"),
+                },
+                .driver_data    = (void *)&nvidia_chipset_data,
+        },
         { }
 };
 
diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c
new file mode 100644
index 000000000000..467bdb7efb23
--- /dev/null
+++ b/drivers/video/backlight/wm831x_bl.c
@@ -0,0 +1,250 @@
+/*
+ * Backlight driver for Wolfson Microelectronics WM831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectonics plc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/pdata.h>
+#include <linux/mfd/wm831x/regulator.h>
+
+struct wm831x_backlight_data {
+        struct wm831x *wm831x;
+        int isink_reg;
+        int current_brightness;
+};
+
+static int wm831x_backlight_set(struct backlight_device *bl, int brightness)
+{
+        struct wm831x_backlight_data *data = bl_get_data(bl);
+        struct wm831x *wm831x = data->wm831x;
+        int power_up = !data->current_brightness && brightness;
+        int power_down = data->current_brightness && !brightness;
+        int ret;
+
+        if (power_up) {
+                /* Enable the ISINK */
+                ret = wm831x_set_bits(wm831x, data->isink_reg,
+                                      WM831X_CS1_ENA, WM831X_CS1_ENA);
+                if (ret < 0)
+                        goto err;
+
+                /* Enable the DC-DC */
+                ret = wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE,
+                                      WM831X_DC4_ENA, WM831X_DC4_ENA);
+                if (ret < 0)
+                        goto err;
+        }
+
+        if (power_down) {
+                /* DCDC first */
+                ret = wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE,
+                                      WM831X_DC4_ENA, 0);
+                if (ret < 0)
+                        goto err;
+
+                /* ISINK */
+                ret = wm831x_set_bits(wm831x, data->isink_reg,
+                                      WM831X_CS1_DRIVE | WM831X_CS1_ENA, 0);
+                if (ret < 0)
+                        goto err;
+        }
+
+        /* Set the new brightness */
+        ret = wm831x_set_bits(wm831x, data->isink_reg,
+                              WM831X_CS1_ISEL_MASK, brightness);
+        if (ret < 0)
+                goto err;
+
+        if (power_up) {
+                /* Drive current through the ISINK */
+                ret = wm831x_set_bits(wm831x, data->isink_reg,
+                                      WM831X_CS1_DRIVE, WM831X_CS1_DRIVE);
+                if (ret < 0)
+                        return ret;
+        }
+
+        data->current_brightness = brightness;
+
+        return 0;
+
+err:
+        /* If we were in the middle of a power transition always shut down
+         * for safety.
+         */
+        if (power_up || power_down) {
+                wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0);
+                wm831x_set_bits(wm831x, data->isink_reg, WM831X_CS1_ENA, 0);
+        }
+
+        return ret;
+}
+
+static int wm831x_backlight_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;
+
+        if (bl->props.state & BL_CORE_SUSPENDED)
+                brightness = 0;
+
+        return wm831x_backlight_set(bl, brightness);
+}
+
+static int wm831x_backlight_get_brightness(struct backlight_device *bl)
+{
+        struct wm831x_backlight_data *data = bl_get_data(bl);
+        return data->current_brightness;
+}
+
+static struct backlight_ops wm831x_backlight_ops = {
+        .options = BL_CORE_SUSPENDRESUME,
+        .update_status  = wm831x_backlight_update_status,
+        .get_brightness = wm831x_backlight_get_brightness,
+};
+
+static int wm831x_backlight_probe(struct platform_device *pdev)
+{
+        struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+        struct wm831x_pdata *wm831x_pdata;
+        struct wm831x_backlight_pdata *pdata;
+        struct wm831x_backlight_data *data;
+        struct backlight_device *bl;
+        int ret, i, max_isel, isink_reg, dcdc_cfg;
+
+        /* We need platform data */
+        if (pdev->dev.parent->platform_data) {
+                wm831x_pdata = pdev->dev.parent->platform_data;
+                pdata = wm831x_pdata->backlight;
+        } else {
+                pdata = NULL;
+        }
+
+        if (!pdata) {
+                dev_err(&pdev->dev, "No platform data supplied\n");
+                return -EINVAL;
+        }
+
+        /* Figure out the maximum current we can use */
+        for (i = 0; i < WM831X_ISINK_MAX_ISEL; i++) {
+                if (wm831x_isinkv_values[i] > pdata->max_uA)
+                        break;
+        }
+
+        if (i == 0) {
+                dev_err(&pdev->dev, "Invalid max_uA: %duA\n", pdata->max_uA);
+                return -EINVAL;
+        }
+        max_isel = i - 1;
+
+        if (pdata->max_uA != wm831x_isinkv_values[max_isel])
+                dev_warn(&pdev->dev,
+                         "Maximum current is %duA not %duA as requested\n",
+                         wm831x_isinkv_values[max_isel], pdata->max_uA);
+
+        switch (pdata->isink) {
+        case 1:
+                isink_reg = WM831X_CURRENT_SINK_1;
+                dcdc_cfg = 0;
+                break;
+        case 2:
+                isink_reg = WM831X_CURRENT_SINK_2;
+                dcdc_cfg = WM831X_DC4_FBSRC;
+                break;
+        default:
+                dev_err(&pdev->dev, "Invalid ISINK %d\n", pdata->isink);
+                return -EINVAL;
+        }
+
+        /* Configure the ISINK to use for feedback */
+        ret = wm831x_reg_unlock(wm831x);
+        if (ret < 0)
+                return ret;
+
+        ret = wm831x_set_bits(wm831x, WM831X_DC4_CONTROL, WM831X_DC4_FBSRC,
+                              dcdc_cfg);
+
+        wm831x_reg_lock(wm831x);
+        if (ret < 0)
+                return ret;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (data == NULL)
+                return -ENOMEM;
+
+        data->wm831x = wm831x;
+        data->current_brightness = 0;
+        data->isink_reg = isink_reg;
+
+        bl = backlight_device_register("wm831x", &pdev->dev,
+                        data, &wm831x_backlight_ops);
+        if (IS_ERR(bl)) {
+                dev_err(&pdev->dev, "failed to register backlight\n");
+                kfree(data);
+                return PTR_ERR(bl);
+        }
+
+        bl->props.max_brightness = max_isel;
+        bl->props.brightness = max_isel;
+
+        platform_set_drvdata(pdev, bl);
+
+        /* Disable the DCDC if it was started so we can bootstrap */
+        wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0);
+
+
+        backlight_update_status(bl);
+
+        return 0;
+}
+
+static int wm831x_backlight_remove(struct platform_device *pdev)
+{
+        struct backlight_device *bl = platform_get_drvdata(pdev);
+        struct wm831x_backlight_data *data = bl_get_data(bl);
+
+        backlight_device_unregister(bl);
+        kfree(data);
+        return 0;
+}
+
+static struct platform_driver wm831x_backlight_driver = {
+        .driver         = {
+                .name   = "wm831x-backlight",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = wm831x_backlight_probe,
+        .remove         = wm831x_backlight_remove,
+};
+
+static int __init wm831x_backlight_init(void)
+{
+        return platform_driver_register(&wm831x_backlight_driver);
+}
+module_init(wm831x_backlight_init);
+
+static void __exit wm831x_backlight_exit(void)
+{
+        platform_driver_unregister(&wm831x_backlight_driver);
+}
+module_exit(wm831x_backlight_exit);
+
+MODULE_DESCRIPTION("Backlight Driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-backlight");