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I2S 配置

2 Dec 2024
Read time: 2 minute(s)
I2S 包括以下配置内容：
  1. 内核配置

    按照 ALSA 的框架设计，I2S 的数据传输使用 DMA 方式，需要 engine 的支持，所以在 menuconfig 中 需要打开 engine 的驱动支持。

    Device Drivers--->
    [*] DMA Engine support--->
            <*> ArtInChip SoCs DMA support

    在 menuconfig 中打开 ALSA 框架的支持，使能 AIC 的 I2S 驱动

  2. DTS 配置
    • D211
      i2s0: i2s@18600000 {
    #sound-dai-cells = <0>;
    compatible = "artinchip,aic-i2s-v1.0";
    reg = <0x18600000 0x400>;
    interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
    clocks = <&cmu CLK_I2S0>;
    resets = <&rst RESET_I2S0>;
    dmas = <&dma DMA_I2S0>, <&dma DMA_I2S0>;
    dma-names = "rx", "tx";
};

i2s1: i2s@18601000 {
    #sound-dai-cells = <0>;
    compatible = "artinchip,aic-i2s-v1.0";
    reg = <0x18601000 0x400>;
    interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
    clocks = <&cmu CLK_I2S1>;
    resets = <&rst RESET_I2S1>;
    dmas = <&dma DMA_I2S1>, <&dma DMA_I2S1>;
    dma-names = "rx", "tx";
};
    • xxx/board.dts 中的配置
      &i2s0 {
    pinctrl-names = "default";
    pinctrl-0 = <&i2s0_clk_pins>;
    status = "disabled";
};

&i2s1 {
    pinctrl-names = "default";
    pinctrl-0 = <&i2s1_clk_pins>, <&i2s1_mclk_pins>, <&i2s1_din_pins_b>;
    status = "okay";
};

    • 根据实际的板型配置，使能相应的 I2S。