start_kernel()里写gpio死机

Chip Platform Rockchip
1

在uboot里调用led_rk3288_start_kernel()是ok的，但是在linux的start_kernel()里调用却死机了
#define LEDRK(x) (*(uint32_t *)(0xff7f0000+x))

void led_rk3288_start_kernel(void)
{

    uint32_t i=0;
    LEDRK(0x80)=(LEDRK(0x80))|0x001c0000;
    udelay(1000);
    LEDRK(0x80)=(LEDRK(0x80))&0xffffffe3;
    udelay(1000);
    LEDRK(0x80)=LEDRK(0x80)&0xffe3ffff;
    udelay(1000);
    LEDRK(0x4)=(LEDRK(0x4))|0x6;
    udelay(1000);
    while(i<10)
    {
            if(i%2)
                    LEDRK(0)=(LEDRK(0))&0xfffffff9;
            else
                    LEDRK(0)=(LEDRK(0))|0x6;
            udelay(1000*1000);
           i++;
    }

}

2

在start_kernel你去掉调用led_rk3288_start_kernel()就是好的，不明白