# Enable UFS device feature using kernel configuration

The following table lists the default values of the kernel configuration to enable UFS device.

UFS device kernel configuration

| Configuration | Enabled by default (yes/no) | Description |
| --- | --- | --- |
| `CONFIG_UFS_FAULT_INJECTION` | No | Injects the failure command for debugging. |
| `CONFIG_SCSI_UFSHCD` | Yes | Enables the UFS host control driver in the kernel. |
| `CONFIG_SCSI_UFSHCD_PLATFORM` | Yes | Supports the UFS controller from the platform bus. |
| `CONFIG_SCSI_UFS_QCOM` | Yes | Enables a Qualcomm-specific addition to access the PHY configuration and vendor-specific registers. |
| `CONFIG_PHY_QCOM_QMP` | Yes | Supports UFS device QMP PHY driver. |
| `CONFIG_SCSI_UFS_BSG` | Yes | Enables UFS device BSG device node. |
| `CONFIG_SCSI_UFS_CRYPTO` | Yes | Supports UFS device crypto engine. |

# Enable eMMC using device tree properties

To enable eMMC, add the following lines in the `&sdhc_1` node in the SoC-specific DTSI file.

&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>;
    };
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Update the following files as per the SoC device tree path `/kernel_platform/kernel/arch/arm64/boot/dts/qcom/`:

- `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`

# Enable SDHCI using kernel configuration

The following table lists the default values of kernel configuration to enable SD card functionality.

SDHC kernel configuration

| Configuration | Enabled by default (yes/no) | Comments |
| --- | --- | --- |
| `CONFIG_MMC` | Yes | Enables MMC driver |
| `CONFIG_MMC_DEBUG` | No | Enables driver debug messages |
| `CONFIG_MMC_SDHCI` | Yes | Detects SDHCI driver |
| `CONFIG_MMC_CQHCI` | Yes | Enables Command Queue Host Control Interface |
| `CONFIG_MMC_SDHCI_MSM` | Yes | Enables MSM SDHCI driver |
| `CONFIG_MMC_BLOCK` | Yes | Enables MMC block driver |
| `CONFIG_MMC_CRYPTO` | Yes | Enables support for the MMC Crypto Engine |

Last Published: Jun 22, 2026

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