MA35D1 SPI2时钟配置

参考下面的配置：

spi2: spi@40620000 {

        compatible = "nuvoton,ma35d1-spi";

        reg = <0x0 0x40620000 0x0 0x10000>;

        interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;

        clocks = <&clk SPI2_GATE>;

        dmas = <&pdma1 8>,<&pdma1 9>;

        dma-names = "tx","rx";

        pdma_reqsel_tx = <64>;

        pdma_reqsel_rx = <65>;

        use_pdma = <0>;

        num_cs = <2>;

        lsb = <0>;

        sleep = <0>;

        txbitlen = <8>;

        bus_num = <4>;

        spimode = <0>;

        mrxphase = <0>;

        spi-max-frequency = <50000000>;

        status = "okay";

    };

&spi2 {

    status = "okay";

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_spi2>;

};

&pinctrl {

    spi2 {

        pinctrl_spi2: spi2grp {

            nuvoton,pins =

                <SYS_GPL_MFPL_PL2MFP_SPI2_SS0 &pcfg_default>,

                <SYS_GPL_MFPL_PL3MFP_SPI2_CLK &pcfg_default>,

                <SYS_GPL_MFPL_PL0MFP_SPI2_MOSI &pcfg_default>,

                <SYS_GPL_MFPL_PL1MFP_SPI2_MISO &pcfg_default>;

        };

    };

};