MA35D1 SPI2时钟配置

1万 · 2023-12-21 16:11

SPI2的时钟配置，默认最高设置的是10MHz，如果我想超过这个频率，设备树如何修改？

只看该作者 · 2023-12-25 09:42

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>;
      };
};
};