> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 使用设备树属性启用 eMMC

要启用 eMMC，请在 SoC 专用 DTSI 文件的 `&sdhc_1` 节点中添加以下行。

```dts theme={null}
&sdhc_1 {
status = "okay";
pinctrl-names = "default", "sleep";
pinctrl-0 = <&sdc1_on>;
pinctrl-1 = <&sdc1_off>;
vmmc-supply = <&vreg_l19a_2p9>;
vqmmc-supply = <&vreg_l12a_1p8>;
};
```

按照 SoC 设备树路径 `/kernel_platform/kernel/arch/arm64/boot/dts/qcom/` 更新以下文件：

* `qcs6490-addons-rb3gen2.dts`
* `qcs6490-rb3gen2.dts`
* `qcs6490-addons-rb3gen2.dtsi`
* `qcs6490-addons-rb3gen2-ia-mezz.dts`
* `qcs6490-addons-rb3gen2-ptz-mezz.dts`
* `qcs6490-addons-rb3gen2-video-mezz.dts`
* `qcs6490-addons-rb3gen2-vision-mezz.dts`
* `qcs6490-addons-rb3gen2-vision-mezz-hsp.dts`