RK3288 Android7.1 禁止調試串口，作普通串口

3288 uart2爲調試串口，更改爲普通串口

• 關掉FIQ debugger，Disable以下節點

    fiq-debugger {
            compatible = "rockchip,fiq-debugger";
            interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
            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";
    };
  

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

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

• 重寫parameter.txt

    commandline：androidboot.console=ttyFIQ0，去掉ttyFIQ0。
  

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

    service recovery /sbin/recovery
     #console 這個註釋掉 
     seclabel u:r:recovery:s0