uboot的devices_init函数分析

一、函数说明

函数功能： 完成设备的初始化

函数位置： common/devices.c

二、程序分析

 int devices_init (void)
 {
 #ifndef CONFIG_ARM     /* already relocated for current ARM implementation */
     ulong relocation_offset = gd->reloc_off;
     int i;
 
     /* relocate device name pointers */
     for (i = ; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
         stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
                         relocation_offset);
     }//重定位设备输入输出设备名字指针
 #endif
 
     /* Initialize the list */
     devlist = ListCreate (sizeof (device_t));//初始化列表
 
     if (devlist == NULL) {
         eputs ("Cannot initialize the list of devices!\n");
         return -;
     }
 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
     i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
 #endif
 #ifdef CONFIG_LCD
     drv_lcd_init ();
 #endif
 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
     drv_video_init ();
 #endif
 #ifdef CONFIG_KEYBOARD
     drv_keyboard_init ();
 #endif
 #ifdef CONFIG_LOGBUFFER
     drv_logbuff_init ();
 #endif
     drv_system_init ();
 #ifdef CONFIG_SERIAL_MULTI
     serial_devices_init ();
 #endif
 #ifdef CONFIG_USB_TTY
     drv_usbtty_init ();
 #endif
 #ifdef CONFIG_NETCONSOLE
     drv_nc_init ();
 #endif
 
     return ();
 }