linux-kernel - [PATCH] ARM: dts: exynos: Assign a fixed index to mmc devices on ODROID XU3/4 boards

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Message-Id: <20201104100855.2337-1-m.reichl@fivetechno.de>
Date:   Wed,  4 Nov 2020 11:08:53 +0100
From:   Markus Reichl <m.reichl@...etechno.de>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Markus Reichl <m.reichl@...etechno.de>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: dts: exynos: Assign a fixed index to mmc devices on ODROID XU3/4 boards

Recently introduced async probe on mmc devices can shuffle block IDs.
Pin them to fixed values to ease booting in evironments where UUIDs
are not practical. Use newly introduced aliases for mmcblk devices from [1].

[1]
https://patchwork.kernel.org/patch/11747669/

Signed-off-by: Markus Reichl <m.reichl@...etechno.de>
---
 arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
index e35af40a55cb..91d2840ac8ca 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
@@ -13,6 +13,11 @@
 #include "exynos5422-odroid-core.dtsi"
 
 / {
+	aliases {
+		mmc0 = &mmc_2;
+		mmc1 = &mmc_0;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
-- 
2.20.1