framebuffer设备驱动分析

一.设备驱动相关文件

    1.1. 驱动框架相关文件

        1.1.1. drivers/video/fbmem.c

            a. 创建graphics类、注册FB的字符设备驱动

fbmem_init(void)
{
    proc_create("fb", 0, NULL, &fb_proc_fops);

    if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
        printk("unable to get major %d for fb devs\n", FB_MAJOR);

    fb_class = class_create(THIS_MODULE, "graphics");
    if (IS_ERR(fb_class)) {
        printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
        fb_class = NULL;
    }
    return 0;
}

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