Re: [PATCH] ARM: dts: sun7i: a20: fix MMC index enumeration

[Giulio Benetti]

On 1/14/26 15:07, Chen-Yu Tsai wrote:
> On Wed, Jan 14, 2026 at 6:50 PM Giulio Benetti
> <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> > Currently, the OLinuXino-A20-Micro experiences non-deterministic MMC
> > enumeration during boot. When both an SDIO WiFi module (MMC1) and
> > an SD card (MMC0) are present, the kernel may swap their indices.
> >
> > Explicitly define mmc* aliases to ensure consistent device naming
> > and prevent mapping conflicts.
>
> Years ago we (sunxi maintainers) decided against this.
>
> > Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx>
> > ---
> >   arch/arm/boot/dts/allwinner/sun7i-a20.dtsi | 4 ++++
>
> And aliases are per board, so this definitely doesn't belong here.

I see, thank you for taking care.

Best regards
Giulio

> ChenYu
>
> >   1 file changed, 4 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/allwinner/sun7i-a20.dtsi b/arch/arm/boot/dts/allwinner/sun7i-a20.dtsi
> > index 5f44f09c5545..a958400bcd7c 100644
> > --- a/arch/arm/boot/dts/allwinner/sun7i-a20.dtsi
> > +++ b/arch/arm/boot/dts/allwinner/sun7i-a20.dtsi
> > @@ -55,6 +55,10 @@ / {
> >          #size-cells = <1>;
> >
> >          aliases {
> > +               mmc0 = &mmc0;
> > +               mmc1 = &mmc1;
> > +               mmc2 = &mmc2;
> > +               mmc3 = &mmc3;
> >                  ethernet0 = &gmac;
> >          };
> >
> > --
> > 2.47.3