高通配置uart

1.pingroup中添加GPIO24、25

kernel\msm-4.14\drivers\pinctrl\qcom\pinctrl-trinket.c

enum trinket_functions {
    msm_mux_qup10_1,
};

static const char * const qup10_1_groups[] = {
         "gpio24", "gpio25",    //uart对应的gpio
 };

static const struct msm_function trinket_functions[] = {
    FUNCTION(qup10_1),
};

static const struct msm_pingroup trinket_groups[] = {
    [24] = PINGROUP(24, WEST, qup10, qup10_1, phase_flag3, NA, NA, NA, NA, NA, NA),    //[x]内uart对应的gpio
    [25] = PINGROUP(25, WEST, qup10, qup10_1, phase_flag2, NA, NA, NA, NA, NA, NA),    //[x]内uart对应的gpio
};

2.添加pinctrl

kernel/msm-4.14/arch/arm64/boot/dts/qcom/trinket-pinctrl.dtsi

&soc {
    tlmm: pinctrl@400000 {        
        qupv3_se5_2uart_pins: qupv3_se5_2uart_pins {
            qupv3_se5_2uart_active: qupv3_se5_2uart_active {
                mux {
                    pins = "gpio24", "gpio25";
                    function = "qup10_1";    //对应pingroup的function
                };

                config {
                        pins = "gpio24", "gpio25";
                        drive-strength = <2>;
                        bias-disable;
                };
            };

            qupv3_se5_2uart_sleep: qupv3_se5_2uart_sleep {
                mux {
                        pins = "gpio24", "gpio25";
                        function = "gpio";
                };

                config {
                        pins = "gpio24", "gpio25";
                        drive-strength = <2>;
                        bias-pull-down;
                };
            };
        };
    };
};

3.添加uart配置

kernel/msm-4.14/arch/arm64/boot/dts/qcom/trinket-qupv3.dtsi

&soc {    
    qupv3_se5_2uart: qcom,qup_uart@4c80000 {
        compatible = "qcom,msm-geni-serial-hs";    //HS驱动属性
        reg = <0x04c80000 0x4000>;    //<寄存器基址 寄存器范围>
        reg-names = "se_phys";
        clock-names = "se-clk", "m-ahb", "s-ahb";
        clocks = <&clock_gcc GCC_QUPV3_WRAP1_S0_CLK>,    //QUP_1 SE0对应GCC_QUPV3_WRAP1_S0_CLK
            <&clock_gcc GCC_QUPV3_WRAP_1_M_AHB_CLK>,    //QUP_1对应GCC_QUPV3_WRAP_1_M_AHB_CLK
            <&clock_gcc GCC_QUPV3_WRAP_1_S_AHB_CLK>;    //QUP_1对应GCC_QUPV3_WRAP_1_S_AHB_CLK
        pinctrl-names = "default", "sleep";
        pinctrl-0 = <&qupv3_se5_2uart_active>;
        pinctrl-1 = <&qupv3_se5_2uart_sleep>;
        //interrupts = <GIC_SPI 308 0>;    //ttyMSM的配置
        interrupts-extended = <&intc GIC_SPI 308 0>,
            <&tlmm 25 0>;    //配置RX的GPIO为中断
        qcom,wakeup-byte = <0xFD>;    //唤醒byte
        qcom,wrapper-core = <&qupv3_1>;    //QUP_1对应qupv3_1
        status = "disabled";
     };
};

4.添加别名和使能

kernel/msm-4.14/arch/arm64/boot/dts/qcom/trinket.dtsi

/ {
    aliases {
        hsuart2 = &qupv3_se5_2uart;    //ttyHS配置hsuart, ttyMSM配置为serial
    };
};

&qupv3_se5_2uart {
    status = "ok";
};