Linux 2.6.34下LCD驱动移植

Linux 2.6.34下LCD驱动移植

Linux下的LCD设备被抽象成标准的framebuffer设备，我们只需要修改与LCD有关的扫描时间及分辨率即可

1、修改 arch/arm/mach-s3c2440/mach-smdk2440.c 如下：

/* LCD driver info */

static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {

       .lcdcon5  = S3C2410_LCDCON5_FRM565|

       //S3C2410_LCDCON5_INVVLINE |

       //S3C2410_LCDCON5_INVVFRAME|

                  S3C2410_LCDCON5_PWREN|

                  S3C2410_LCDCON5_HWSWP,

       .type  = S3C2410_LCDCON1_TFT,

       .width  = 320,

       .height = 240,

       .pixclock = 64000,               /*HCLK 60 MHz, divisor 10 */

       .xres              = 320,

       .yres              = 240,

       .bpp               =16,

       .left_margin    = 18,

       .right_margin  = 38,

       .hsync_len      = 30,

       .upper_margin = 18,

       .lower_margin = 18,

       .vsync_len      = 3,

};

static struct s3c2410fb_mach_info smdk2440_fb_info __initdata = {

       .displays  = &smdk2440_lcd_cfg,

       .num_displays = 1,

       .default_display= 0,

#if 0

       /*currently setup by downloader */

       .gpccon          = 0xaa940659,

       .gpccon_mask       = 0xffffffff,

       .gpcup           = 0x0000ffff,

       .gpcup_mask  = 0xffffffff,

       .gpdcon          = 0xaa84aaa0,

       .gpdcon_mask       = 0xffffffff,

       .gpdup           = 0x0000faff,

       .gpdup_mask  = 0xffffffff,

#endif

       .gpccon =      0xaa955699,    //这是将GPC和GPD设置成功能引脚，也可以不设置

       .gpccon_mask =  0xffc003cc,

       .gpcup           =0x0000ffff,

       .gpcup_mask  = 0xffffffff,

       .gpdcon =       0xaa95aaa1,

       .gpdcon_mask =  0xffc0fff0,

       .gpdup           =0x0000faff,

       .gpdup_mask  = 0xffffffff,

       //.lpcsel          = ((0xCE6) & ~7) | 1<<4,

       .lpcsel            = 0xf82,  //设置TCONSEL寄存器选择三星240x320

};

static struct platform_device*smdk2440_devices[] __initdata = {

       &s3c_device_ohci,

       &s3c_device_lcd,                 //检查这里有没有加上

       &s3c_device_wdt,

       &s3c_device_i2c0,

       &s3c_device_iis,

};

2.让系统启动起来看到 bootlogo 小企鹅，得在 make menuconfig 中进行配置添加

     在Device Drivers ---> Graphics support ---> Bootup logo下面可以全部选中支持