1、修改/home/data/AR9344/SDK/sdk/boot/u-boot/include/configs/ar7240.h文件

 24 #ifdef CONFIG_ROOTFS_FLASH                                                                                                                                              
 25 #define CONFIG_BOOTARGS "board=DR342 console=ttyS0,115200 mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,14528k(rootfs),1472k(kernel),64k(art),16000k@0x50000(firmware),16384k@0x0(all)"    
 26 #else
 27 #define CONFIG_BOOTARGS ""
 28 #endif

2、修改/home/data/AR9344/SDK/sdk/boot/u-boot/common/cmd_bootm.c文件

   156 int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
   157 {    
   158     ulong   iflag;
   159     ulong   addr;
   160     ulong   data, len, checksum;
   161     ulong  *len_ptr;
   162     uint    unc_len = CFG_BOOTM_LEN;
   163     int i, verify;
   164     char    *name, *s;
   165     int (*appl)(int, char *[]);
   166     image_header_t *hdr = &header;
   167      
   168     s = getenv ("verify");
   169     verify = (s && (*s == 'n')) ? 0 : 1;
   170      
   171     if (argc < 2) {
   172         addr = load_addr;
   173     } else {
   174         addr = simple_strtoul(argv[1], NULL, 16);
   175     }
   176      
   177     addr = 0x9fe80000;                                                                                                                                               
   178      
   179     SHOW_BOOT_PROGRESS (1);
   180     printf ("## Booting image at %08lx ...\n", addr);

3、修改/home/data/AR9344/SDK/sdk/boot/u-boot/include/ar7240_soc.h文件

438 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_MSB                        15
439 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_LSB                        8
440 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_MASK                       0x0000ff00
441 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_GET(x)                     (((x) & GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_MASK) >> GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_LSB)
442 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_SET(x)                     (((x) << GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_LSB) & GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_MASK)
443 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_RESET                      0x1 // 1
444 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_MSB                        7
445 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_LSB                        0
446 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_MASK                       0x000000ff
447 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_GET(x)                     (((x) & GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_MASK) >> GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_LSB)
448 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_SET(x)                     (((x) << GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_LSB) & GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_MASK)
449 #define GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_RESET                      0x0 // 0
450 #define GPIO_OUT_FUNCTION4_ADDRESS                                   0x1804003c                                                                                         
451  
452 /*
453  * IRQ Map.
454  * There are 4 conceptual ICs in the system. We generally give a block of 16
455  * irqs to each IC.
456  * CPU:                     0    - 0xf
457  *      MISC:               0x10 - 0x1f
458  *          GPIO:           0x20 - 0x2f
459  *      PCI :               0x30 - 0x40
460  *
461  */
462 #define AR7240_CPU_IRQ_BASE         0x00
463 #define AR7240_MISC_IRQ_BASE        0x10
464 #define AR7240_GPIO_IRQ_BASE        0x20
465 #define AR7240_PCI_IRQ_BASE         0x30

4、修改/home/data/AR9344/SDK/sdk/boot/u-boot/board/ar7240/db12x/db12x.c文件

   61 void wasp_gpio_config(void)
   62 {
   63     /* disable the CLK_OBS on GPIO_4 and set GPIO4 as input */
   64     ar7240_reg_rmw_clear(GPIO_OE_ADDRESS, (1 << 4));
   65     ar7240_reg_rmw_clear(GPIO_OUT_FUNCTION1_ADDRESS, GPIO_OUT_FUNCTION1_ENABLE_GPIO_4_MASK);
   66     ar7240_reg_rmw_set(GPIO_OUT_FUNCTION1_ADDRESS, GPIO_OUT_FUNCTION1_ENABLE_GPIO_4_SET(0x80));
   67     ar7240_reg_rmw_set(GPIO_OE_ADDRESS, (1 << 4));
   68      
   69     ar7240_reg_rmw_clear(GPIO_OE_ADDRESS, (1 << 16));
   70     ar7240_reg_rmw_clear(GPIO_OUT_FUNCTION4_ADDRESS, GPIO_OUT_FUNCTION4_ENABLE_GPIO_16_MASK);
   71     ar7240_reg_rmw_clear(GPIO_OE_ADDRESS, (1 << 17));
   72     ar7240_reg_rmw_clear(GPIO_OUT_FUNCTION4_ADDRESS, GPIO_OUT_FUNCTION4_ENABLE_GPIO_17_MASK);
   73 }