嵌入式

Linux 2.6.34下LCD驱动移植

2019-07-12 21:12发布

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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

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