Hi3519AV100开启UART串口

1.首先找到内核源码 Hi3519AV100_SDK_V2.0.2.0/osdrv/opensource/kernel/linux-4.9.y

2.修改hi3519av100.dts文件：源码/arch/arm/boot/dts/hi3519av100.dts

&uart0 {
        status = "okay";
};

&uart1 {                                //自行加入
        status = "okay";                //自行加入
};                                      //自行加入

&uart2 {                                //自行加入
        status = "okay";                //自行加入
};                                      //自行加入

3.修改hi3519av100.dtsi文件：源码/arch/arm/boot/dts/hi3519av100.dtsi

aliases {
    serial0 = &uart0;               
    serial1 = &uart1;               //自行加入          
    serial2 = &uart2;               //自行加入

amba {
    #address-cells = <1>;
    #size-cells = <1>;
    compatible = "arm,amba-bus";
    ranges;

    uart0: uart@04540000 {
            compatible = "arm,pl011", "arm,primecell";
            reg = <0x04540000 0x1000>;
            interrupts = <0 36 4>;
            clocks = <&clock HI3519AV100_UART0_CLK>;
            clock-names = "apb_pclk";
            status = "okay";        //由disable改为okay                    
    };

    uart1: uart@04541000 {
            compatible = "arm,pl011", "arm,primecell";
            reg = <0x04541000 0x1000>;
            interrupts = <0 37 4>;
            clocks = <&clock HI3519AV100_UART1_CLK>;
            clock-names = "apb_pclk";
            dmas = <&hiedmacv310_0 2 2>, <&hiedmacv310_0 3 3>;
            dma-names = "tx","rx";
            status = "okay";        //由disable改为okay    
    };

    uart2: uart@04542000 {
            compatible = "arm,pl011", "arm,primecell";
            reg = <0x04542000 0x1000>;
            interrupts = <0 38 4>;
            clocks = <&clock HI3519AV100_UART2_CLK>;
            clock-names = "apb_pclk";
            dmas = <&hiedmacv310_0 4 4>, <&hiedmacv310_0 5 5>;
            dma-names = "tx","rx";
            status = "okay";        //由disable改为okay    
    };

4.打开终端进入到源码目录

cd Hi3519AV100_SDK_V2.0.2.0/osdrv/opensource/kernel/linux-4.9.y

5.拷贝对应的配置文件

cp arch/arm/configs/hi3519av100_xxxxxx_defconfig .config

可选的配置文件如下：

hi3519av100_amp_defconfig       
hi3519av100_amp_nand_defconfig  
hi3519av100_amp_emmc_defconfig  
hi3519av100_smp_defconfig       
hi3519av100_smp_nand_defconfig
hi3519av100_smp_emmc_defconfig

6.编译，进入kernel configuration

make ARCH=arm CROSS_COMPILE=arm-himix200-linux- menuconfig

按照如下配置：

Device Drivers  --->
    Character devices  ---> 
            Serial drivers  ---> 
                     <*> ARM AMBA PL011 serial port support                                                                              
                      [*]   Support for console on AMBA serial port  

保存修改并退出

7.编译生成uImage

make ARCH=arm CROSS_COMPILE=arm-himix200-linux- uImage

8. ls /dev就会查看到 ttyAMA0 ttyAMA1 ttyAMA2 了

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原文链接：https://blog.csdn.net/u012915226/article/details/119451986原文链接：https://blog.csdn.net/u012915226/article/details/119451986