Index: linux-2.6.24/arch/arm/plat-s3c24xx/devs.c =================================================================== --- linux-2.6.24.orig/arch/arm/plat-s3c24xx/devs.c 2008-02-16 15:27:01.000000000 +0100 +++ linux-2.6.24/arch/arm/plat-s3c24xx/devs.c 2008-02-16 15:28:43.000000000 +0100 @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -613,6 +614,23 @@ EXPORT_SYMBOL(s3c_device_timer3); +/* LCD backlight */ + +struct platform_device s3c_device_bl = { + .name = "s3c2410-bl", + .id = -1, +}; + +EXPORT_SYMBOL(s3c_device_bl); + +static struct s3c2410_bl_mach_info s3c2410bl_info; + +void __init set_s3c2410bl_info(struct s3c2410_bl_mach_info *hard_s3c2410bl_info) +{ + memcpy(&s3c2410bl_info, hard_s3c2410bl_info, sizeof(struct s3c2410_bl_mach_info)); + s3c_device_bl.dev.platform_data = &s3c2410bl_info; +} + #ifdef CONFIG_CPU_S3C2440 /* Camif Controller */ Index: linux-2.6.24/include/asm/arch-s3c2410/lcd.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.24/include/asm/arch-s3c2410/lcd.h 2008-02-16 15:28:43.000000000 +0100 @@ -0,0 +1,33 @@ +/* linux/include/asm/arch-s3c2410/lcd.h + * + * Copyright (c) 2005 Arnaud Patard + * + * + * 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. + * + * + * Changelog: + * 14-Mar-2005 RTP Created file + * 07-Apr-2005 RTP Renamed to s3c2410_lcd.h + * 03-Aug-2005 RTP Renamed to lcd.h + */ + +#ifndef __ASM_ARM_LCD_H +#define __ASM_ARM_LCD_H + +struct s3c2410_bl_mach_info { + int lcd_power_value; + int backlight_power_value; + int brightness_value; + int backlight_max; + int backlight_default; + void (*backlight_power)(int); + void (*set_brightness)(int); + void (*lcd_power)(int); +}; + +void __init set_s3c2410bl_info(struct s3c2410_bl_mach_info *hard_s3c2410bl_info); + +#endif /* __ASM_ARM_LCD_H */ Index: linux-2.6.24/include/asm-arm/plat-s3c24xx/devs.h =================================================================== --- linux-2.6.24.orig/include/asm-arm/plat-s3c24xx/devs.h 2008-02-16 15:27:01.000000000 +0100 +++ linux-2.6.24/include/asm-arm/plat-s3c24xx/devs.h 2008-02-16 15:28:43.000000000 +0100 @@ -44,6 +44,8 @@ extern struct platform_device s3c_device_usbgadget; extern struct platform_device s3c_device_ts; +extern struct platform_device s3c_device_bl; + /* s3c2440 specific devices */ #ifdef CONFIG_CPU_S3C2440 Index: linux-2.6.24/drivers/video/backlight/Kconfig =================================================================== --- linux-2.6.24.orig/drivers/video/backlight/Kconfig 2008-02-16 15:27:01.000000000 +0100 +++ linux-2.6.24/drivers/video/backlight/Kconfig 2008-02-16 15:28:43.000000000 +0100 @@ -67,6 +67,14 @@ If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to enable the LCD/backlight driver. +config BACKLIGHT_S3C2410 + tristate "Samsung S3C2410 Backlight Driver" + depends on (BACKLIGHT_DEVICE || LCD_CLASS_DEVICE) && ARCH_S3C2410 + default y + help + If you have a backlight controler connected on a Samsung S3C2410, + say y here to enable the driver. + config BACKLIGHT_HP680 tristate "HP Jornada 680 Backlight Driver" depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX Index: linux-2.6.24/drivers/video/backlight/Makefile =================================================================== --- linux-2.6.24.orig/drivers/video/backlight/Makefile 2008-02-16 15:27:01.000000000 +0100 +++ linux-2.6.24/drivers/video/backlight/Makefile 2008-02-16 15:28:43.000000000 +0100 @@ -5,6 +5,7 @@ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o +obj-$(CONFIG_BACKLIGHT_S3C2410) += s3c2410_lcd.o obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o Index: linux-2.6.24/drivers/video/backlight/s3c2410_lcd.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.24/drivers/video/backlight/s3c2410_lcd.c 2008-02-16 15:28:43.000000000 +0100 @@ -0,0 +1,248 @@ +/* + * linux/drivers/video/backlight/s3c2410_lcd.c + * Copyright (c) Arnaud Patard + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + * + * S3C2410 LCD Controller Backlight Driver + */ + +#include +#include +#include +#include +#include +#include +#include + +struct s3c2410bl_devs { + struct backlight_device *bl; + struct lcd_device *lcd; +}; + +static char suspended; + +static int s3c2410bl_get_lcd_power(struct lcd_device *lcd) +{ + struct s3c2410_bl_mach_info *info; + + info = (struct s3c2410_bl_mach_info *)lcd_get_data(lcd); + + if (info) + return info->lcd_power_value; + + return 0; +} + +static int s3c2410bl_set_lcd_power(struct lcd_device *lcd, int power) +{ + struct s3c2410_bl_mach_info *info; + int lcd_power = 1; + + info = (struct s3c2410_bl_mach_info *)lcd_get_data(lcd); + + if (info && info->lcd_power) { + info->lcd_power_value = power; + if (power != FB_BLANK_UNBLANK) + lcd_power = 0; + if (suspended) + lcd_power = 0; + info->lcd_power(lcd_power); + } + + return 0; +} +static int s3c2410bl_get_bl_brightness(struct backlight_device *bl) +{ + struct s3c2410_bl_mach_info *info; + + info = (struct s3c2410_bl_mach_info *)bl_get_data(bl); + + if(info) + return info->brightness_value; + + return 0; +} + +static int s3c2410bl_set_bl_brightness(struct backlight_device *bl) +{ + struct s3c2410_bl_mach_info *info; + int brightness = bl->props.brightness; + int power = 1; + + info = (struct s3c2410_bl_mach_info *)bl_get_data(bl); + + if (bl->props.power != FB_BLANK_UNBLANK) + power = 0; + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + power = 0; + if (suspended) + power = 0; + + if (info && info->set_brightness) { + if ( brightness ) + { + info->brightness_value = brightness; + info->set_brightness(brightness); + } + else + power = 0; + } + if (info && info->backlight_power) { + info->backlight_power_value = power; + info->backlight_power(power); + } + + return 0; +} + +static int is_s3c2410fb(struct fb_info *info) +{ + return (!strcmp(info->fix.id,"s3c2410fb")); +} + +static struct backlight_ops s3c2410bl_ops = { + .get_brightness = s3c2410bl_get_bl_brightness, + .update_status = s3c2410bl_set_bl_brightness, + .check_fb = is_s3c2410fb +}; +static struct lcd_ops s3c2410lcd_ops = { + .get_power = s3c2410bl_get_lcd_power, + .set_power = s3c2410bl_set_lcd_power, + .check_fb = is_s3c2410fb +}; + +static int __init s3c2410bl_probe(struct platform_device *pdev) +{ + struct s3c2410bl_devs *devs; + struct s3c2410_bl_mach_info *info; + + suspended = 0; + + info = (struct s3c2410_bl_mach_info *)pdev->dev.platform_data; + + if (!info) { + printk(KERN_ERR "Hm... too bad : no platform data for bl\n"); + return -EINVAL; + } + + devs = (struct s3c2410bl_devs *)kmalloc(sizeof(*devs), GFP_KERNEL); + if (!devs) { + return -ENOMEM; + } + + /* Register the backlight device */ + devs->bl = backlight_device_register ("s3c2410-bl", &pdev->dev, info, + &s3c2410bl_ops); + + if (IS_ERR (devs->bl)) { + kfree(devs); + return PTR_ERR (devs->bl); + } + + devs->bl->props.max_brightness = info->backlight_max; + + /* Set default brightness */ + devs->bl->props.power = FB_BLANK_UNBLANK; + devs->bl->props.brightness = info->backlight_default; + s3c2410bl_set_bl_brightness(devs->bl); + + devs->lcd = lcd_device_register("s3c2410-lcd", &pdev->dev, info, &s3c2410lcd_ops); + + if (IS_ERR (devs->lcd)) { + backlight_device_unregister(devs->bl); + kfree(devs); + return PTR_ERR (devs->lcd); + } + platform_set_drvdata(pdev, devs); + + printk(KERN_ERR "s3c2410 Backlight Driver Initialized.\n"); + return 0; +} + +static int s3c2410bl_remove(struct platform_device *pdev) +{ + struct s3c2410bl_devs *devs = platform_get_drvdata(pdev); + + if (devs) { + if (devs->bl) { + devs->bl->props.power = FB_BLANK_POWERDOWN; + s3c2410bl_set_bl_brightness(devs->bl); + backlight_device_unregister(devs->bl); + } + if (devs->lcd) { + lcd_device_unregister(devs->lcd); + } + kfree(devs); + } + + printk("s3c2410 Backlight Driver Unloaded\n"); + + return 0; + +} + +#ifdef CONFIG_PM +static int s3c2410bl_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct s3c2410bl_devs *devs = platform_get_drvdata(pdev); + struct s3c2410_bl_mach_info *info = (struct s3c2410_bl_mach_info *)pdev->dev.platform_data; + + if (devs) { + suspended = 1; + s3c2410bl_set_bl_brightness(devs->bl); + s3c2410bl_set_lcd_power(devs->lcd, info->lcd_power_value); + } + + return 0; +} + +static int s3c2410bl_resume(struct platform_device *pdev) +{ + struct s3c2410bl_devs *devs = platform_get_drvdata(pdev); + struct s3c2410_bl_mach_info *info = (struct s3c2410_bl_mach_info *)pdev->dev.platform_data; + + if (devs) { + suspended = 0; + s3c2410bl_set_lcd_power(devs->lcd, info->lcd_power_value); + s3c2410bl_set_bl_brightness(devs->bl); + } + return 0; +} +#else +#define s3c2410bl_suspend NULL +#define s3c2410bl_resume NULL +#endif + +static struct platform_driver s3c2410bl_driver = { + .driver = { + .name = "s3c2410-bl", + .owner = THIS_MODULE, + }, + .probe = s3c2410bl_probe, + .remove = s3c2410bl_remove, + .suspend = s3c2410bl_suspend, + .resume = s3c2410bl_resume, +}; + + + +static int __init s3c2410bl_init(void) +{ + return platform_driver_register(&s3c2410bl_driver); +} + +static void __exit s3c2410bl_cleanup(void) +{ + platform_driver_unregister(&s3c2410bl_driver); +} + +module_init(s3c2410bl_init); +module_exit(s3c2410bl_cleanup); + +MODULE_AUTHOR("Arnaud Patard "); +MODULE_DESCRIPTION("s3c2410 Backlight Driver"); +MODULE_LICENSE("GPL"); +