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3288 uart2为调试串口，更改为普通串口

• 关掉FIQ debugger，Disable以下节点

  fiq-debugger {          compatible = "rockchip,fiq-debugger";          interrupts = 
       
        ;          rockchip,serial-id = <2>;          rockchip,wake-irq = <0>;          rockchip,irq-mode-enable = <0>;  /* If enable uart uses irq instead of fiq */          rockchip,baudrate = <115200>;  /* Only 115200 and 1500000 */          pinctrl-names = "default";          pinctrl-0 = <&uart2_xfer>;          status = "disabled";  };
       

• 注释 bootargs = “earlycon=uart8250,mmio32,0xff690000 vmalloc=496M”;

  chosen {  //      bootargs = "earlycon=uart8250,mmio32,0xff690000 vmalloc=496M";  };

• 重写parameter.txt

  commandline：androidboot.console=ttyFIQ0，去掉ttyFIQ0。

• android/device/rockchip/common/recovery/etc/init.rc

  service recovery /sbin/recovery   #console 这个注释掉    seclabel u:r:recovery:s0