Re: [PATCH] ARM: dts: sun7i: a20: fix MMC index enumeration
From: Chen-Yu Tsai <wens@kernel.org>
Date: 2026-01-14 14:07:29
Also in:
linux-devicetree, linux-sunxi, lkml
On Wed, Jan 14, 2026 at 6:50 PM Giulio Benetti [off-list ref] 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@benettiengineering.com> --- arch/arm/boot/dts/allwinner/sun7i-a20.dtsi | 4 ++++
And aliases are per board, so this definitely doesn't belong here. ChenYu
quoted hunk ↗ jump to hunk
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