如何在Linux 4.14.98的IMX7D主模式下使用SAI1？

大家好，

我们正在为我们的原型板使用 imx7D，并尝试与 TLV320DAC3100 接口。
我们已将 SAI1 连接到编解码器。我想从 SAI1 生成 MCLK。当内核启动时，我可以看到 MCLK 引脚上的时钟持续 2 秒，然后关闭。有人可以验证我的设备树是否正确，如果不正确，如何更正？


&sai1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai1>;
assigned-clocks = <&clks IMX7D_SAI1_ROOT_SRC>,
<&clks IMX7D_SAI1_ROOT_CLK>;
assigned-clock-parents = <&clks IMX7D_PLL_AUDIO_POST_DIV>;
assigned-clock-rates = <0>, <24576000>;
fsl,sai-mclk-direction-output;
fsl,sai-synchronous-rx;
status = "okay";
};


pinctrl_sai1: sai1grp {
fsl,pins = <
MX7D_PAD_SAI1_MCLK__SAI1_MCLK 0x1f
MX7D_PAD_ENET1_RX_CLK__SAI1_TX_BCLK 0x1f
MX7D_PAD_ENET1_CRS__SAI1_TX_SYNC 0x1f
MX7D_PAD_ENET1_COL__SAI1_TX_DATA0 0x30
>;
};



sound {
compatible = "simple-audio-card";
simple-audio-card,name = "Audio Output";
simple-audio-card,format = "i2s";
simple-audio-card,bitclock-master = <&sound_codec>;
simple-audio-card,frame-master = <&sound_codec>;
simple-audio-card,widgets =
"Headphone", "Headphone Jack",
"Speaker", "speakerOut";
simple-audio-card,routing =
"Headphone Jack", "HPL",
"Headphone Jack", "HPR",
"speakerOut", "SPK";
simple-audio-card,cpu {
sound-dai = <&sai1>;
};

sound_codec: simple-audio-card,codec {
sound-dai = <&codec1>;
clocks = <&clks IMX7D_SAI1_ROOT_SRC>;
};
};



codec1: codec@18 {
compatible = "ti,tlv320dac3100";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_codec1>;
reg = <0x18>;
#sound-dai-cells = <0>;
HPVDD-supply = <&audio_3v3>;
SPRVDD-supply = <&audio_3v3>;
SPLVDD-supply = <&audio_3v3>;
AVDD-supply = <&audio_3v3>;
IOVDD-supply = <&audio_3v3>;
DVDD-supply = <&audio_3v3>;
gpio-reset = <&gpio6 12 GPIO_ACTIVE_HIGH>;
status = "okay";
};