Re: [PATCH V1 0/2] arm64: dts: qcom: lemans-evk: Update SDHC storage support via overlays

[Dmitry Baryshkov]

On Fri, Feb 27, 2026 at 03:54:03PM +0530, Monish Chunara wrote:
> This series updates the device tree configuration for the LeMans EVK
> board to support dynamic selection between SD card and eMMC storage.
> 
> The LeMans EVK hardware supports either an SD card or eMMC, but the
> interfaces are mutually exclusive as they share the same controller and
> resources. Previously, SD card support was hardcoded in the main device
> tree, preventing easy switching to eMMC.
> 
> This series refactors the SDHC configuration by:
> 
> 1. Moving the existing SD card configuration into a dedicated overlay.
> 2. Adding a new overlay to support eMMC.
> 3. Updating the common SDHC node in the SoC dtsi to include necessary
> resources (clocks, register ranges) required by the eMMC configuration.
> 
> This allows the bootloader to apply the appropriate overlay based on the
> desired storage medium.

Is there a default mode of operation / extension? If there is one,
please define it in the base DT and override it in a single overlay
rather than having two mutually exclusive overlays.

> 
> Monish Chunara (2):
>   arm64: dts: qcom: lemans-evk: Move SD card support to overlay
>   arm64: dts: qcom: lemans-evk: Add SDHCI support for eMMC via overlay
> 
>  arch/arm64/boot/dts/qcom/Makefile             |  6 ++
>  arch/arm64/boot/dts/qcom/lemans-evk-emmc.dtso | 64 +++++++++++++++++++
>  .../boot/dts/qcom/lemans-evk-sd-card.dtso     | 25 ++++++++
>  arch/arm64/boot/dts/qcom/lemans-evk.dts       | 16 -----
>  arch/arm64/boot/dts/qcom/lemans.dtsi          | 10 ++-
>  5 files changed, 102 insertions(+), 19 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/qcom/lemans-evk-emmc.dtso
>  create mode 100644 arch/arm64/boot/dts/qcom/lemans-evk-sd-card.dtso
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry