result = acpi_video_device_lcd_set_level(device, level_next);
+ if (!result)
+ backlight_force_update(device->backlight,
+ BACKLIGHT_UPDATE_HOTKEY);
+
out:
if (result)
printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
struct backlight_device *bd = eeepc_backlight_device;
if (bd) {
int old = bd->props.brightness;
- bd->props.brightness = read_brightness(bd);
+ backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
return old;
}
return -1;
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
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.
+
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-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
obj-$(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
--- /dev/null
+/*
+ * 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, ®_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, ®_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");
--- /dev/null
+/*
+ * 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");
}
#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)
{
}
mutex_unlock(&bd->ops_lock);
+ backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS);
+
return rc;
}
__ATTR_NULL,
};
+/**
+ * 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.
.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;
--- /dev/null
+/*
+ * 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");
},
.driver_data = (void *)&intel_chipset_data,
},
+ {
+ .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",
},
.driver_data = (void *)&nvidia_chipset_data,
},
+ {
+ .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",
},
.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,
+ },
{ }
};
--- /dev/null
+/*
+ * 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");
* Any other use of the locks below is probably wrong.
*/
+enum backlight_update_reason {
+ BACKLIGHT_UPDATE_HOTKEY,
+ BACKLIGHT_UPDATE_SYSFS,
+};
+
struct backlight_device;
struct fb_info;
extern struct backlight_device *backlight_device_register(const char *name,
struct device *dev, void *devdata, struct backlight_ops *ops);
extern void backlight_device_unregister(struct backlight_device *bd);
+extern void backlight_force_update(struct backlight_device *bd,
+ enum backlight_update_reason reason);
#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)
--- /dev/null
+/*
+ * lms283gf05.h - Platform glue 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#ifndef _INCLUDE_LINUX_SPI_LMS283GF05_H_
+#define _INCLUDE_LINUX_SPI_LMS283GF05_H_
+
+struct lms283gf05_pdata {
+ unsigned long reset_gpio;
+ bool reset_inverted;
+};
+
+#endif /* _INCLUDE_LINUX_SPI_LMS283GF05_H_ */
projects / mv-sheeva.git / commitdiff