Re: [PATCH] ARM: dts: bcm2711-rpi: Use aliases to set custom MMC device index

[Stefan Wahren]

Hi Ariel,

Am 14.06.22 um 16:12 schrieb Ariel D'Alessandro:
> Add MMC aliases to ensure that the /dev/mmcblk ID for the first
> eMMC/SD card won't change depending on the probe order of the MMC
> drivers.

this changes the emmc2 from mmc1 to mmc0 in my case (RPi 4, 
multi_v7_defconfig), which i consider as a regression / unexpected 
change in userspace.

Could you please explain your actual motivation of your patch?

> Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@xxxxxxxxxxxxx>
> ---
>
> Changes in v2:
> * Moved alias from bcm2711-rpi-4-b.dts to bcm2711-rpi.dtsi
>
>   arch/arm/boot/dts/bcm2711-rpi.dtsi | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/bcm2711-rpi.dtsi b/arch/arm/boot/dts/bcm2711-rpi.dtsi
> index ca266c5d9f9b..a39b2f68e4cc 100644
> --- a/arch/arm/boot/dts/bcm2711-rpi.dtsi
> +++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi
> @@ -13,6 +13,7 @@ memory@0 {
>   	aliases {
>   		emmc2bus = &emmc2bus;
>   		ethernet0 = &genet;
> +		mmc0 = &emmc2;	/* mmcblk0 for eMMC/SD */
>   		pcie0 = &pcie0;
>   		blconfig = &blconfig;
>   	};