linux-kernel - [PATCH 5/7] arm64: dts: exynos7870-a2corelte: add bus-width to mmc0 node

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Message-Id: <20250928-exynos7870-dt-fixes-v1-5-a40e77a73f16@disroot.org>
Date: Sun, 28 Sep 2025 22:13:56 +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 5/7] arm64: dts: exynos7870-a2corelte: 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-a2corelte.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts b/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
index f8a7610abeb77cab9f38aaf48d441d99ec61ab5f..1193f0f7dcc171762fefccee23c2c294a41c46c9 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
+++ b/arch/arm64/boot/dts/exynos/exynos7870-a2corelte.dts
@@ -447,6 +447,7 @@ &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