linux-kernel - [PATCH 7/7] arm64: dts: exynos7870-on7xelte: add bus-width to mmc0 node

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Message-Id: <20250928-exynos7870-dt-fixes-v1-7-a40e77a73f16@disroot.org>
Date: Sun, 28 Sep 2025 22:13:58 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 7/7] arm64: dts: exynos7870-on7xelte: add bus-width to mmc0
 node

Add the bus-width property in &mmc0 node. The Exynos DWMMC driver
assumes bus width to be 8 if not present in devicetree, so at least with
respect to the Linux kernel, this doesn't introduce any functional
changes. But other drivers referring to it may not. Either way, without
the bus-width property the hardware description remains incomplete.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
index 66413a9506276cca8925e644c0e857fb5c48112d..87549e9560643cd0692ce4a9b2c5cdff80b21173 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7870-on7xelte.dts
@@ -463,6 +463,7 @@ &mmc0 {
 	vmmc-supply = <&vdd_ldo26>;
 	vqmmc-supply = <&vdd_ldo27>;
 
+	bus-width = <8>;
 	fifo-depth = <64>;
 	samsung,dw-mshc-ciu-div = <3>;
 	samsung,dw-mshc-sdr-timing = <0 4>;

-- 
2.51.0