linux-kernel - [PATCH] ARM: dts: exynos: Assign a fixed index to mmc devices on exynos4412 based ODROID boards

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Date:   Wed,  4 Nov 2020 11:25:56 +0100
From:   Markus Reichl <m.reichl@...etechno.de>
To:     Rob Herring <robh+dt@...nel.org>, Kukjin Kim <kgene@...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 exynos4412 based ODROID boards

Recently introduced async probe on mmc devices can shuffle block IDs.
Pin them to fixed values to ease booting in evironments where UUIDs ar 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/exynos4412-odroid-common.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
index a5c1ce1e396c..aa10d5bc7e1c 100644
--- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
+++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
@@ -13,6 +13,11 @@
 #include "exynos-mfc-reserved-memory.dtsi"
 
 / {
+	aliases {
+		mmc0 = &sdhci_2;
+		mmc1 = &mshc_0;
+	};
+
 	chosen {
 		stdout-path = &serial_1;
 	};
-- 
2.20.1