[PATCH v2] arm64: dts: mt8173: elm: Use aliases to mmc nodes

[Chen-Yu Tsai]

Hi,

On Mon, Jul 26, 2021 at 6:25 PM Hsin-Yi Wang <hsinyi at chromium.org> wrote:
>
> Use aliases to mmc nodes so the partition name for eMMC and SD card will
> be consistent across boots.

To be honest I think this deserves a bit more pretext:

There used to be no way to specify the order of MMC controllers, and
the numbering was based on how the implementations added the devices.
For Linux, this changed when asynchronous probing was enabled for most
drivers, resulting in mmc device numbers jumping around.

With commit 1796164fac7e ("dt-bindings: mmc: document alias support"),
a way to specify fixed index numbers was provided.


Otherwise,

Reviewed-by: Chen-Yu Tsai <wenst at chromium.org>

Same for the mt8183-kukui patch.


> Signed-off-by: Hsin-Yi Wang <hsinyi at chromium.org>
> ---
> v1->v2: skip unused mmc2.
> ---
>  arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> index 21452c51a20a8..d5a2cad39c9c7 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> @@ -10,6 +10,12 @@
>  #include "mt8173.dtsi"
>
>  / {
> +       aliases {
> +               mmc0 = &mmc0;
> +               mmc1 = &mmc1;
> +               mmc2 = &mmc3;
> +       };
> +
>         memory at 40000000 {
>                 device_type = "memory";
>                 reg = <0 0x40000000 0 0x80000000>;
> --
> 2.32.0.432.gabb21c7263-goog
>
>
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