linux-kernel - [PATCH] arm64: dts: rockchip: fix eMMC corruption on NanoPC-T6 with A3A444 chips

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Message-ID: <20251017073954.130710-1-cnsztl@gmail.com>
Date: Fri, 17 Oct 2025 15:39:54 +0800
From: Tianling Shen <cnsztl@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Grzegorz Sterniczuk <grzegorz@...rnicz.uk>,
	Tianling Shen <cnsztl@...il.com>,
	Dragan Simic <dsimic@...jaro.org>,
	Jonas Karlman <jonas@...boo.se>
Cc: devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: rockchip: fix eMMC corruption on NanoPC-T6 with A3A444 chips

From: Grzegorz Sterniczuk <grzegorz@...rnicz.uk>

Some NanoPC-T6 boards with A3A444 eMMC chips experience I/O errors and
corruption when using HS400 mode. Downgrade to HS200 mode to ensure
stable operation.

Signed-off-by: Grzegorz Sterniczuk <grzegorz@...rnicz.uk>
Signed-off-by: Tianling Shen <cnsztl@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
index fafeabe9adf9..5f63f38f7326 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
@@ -717,8 +717,7 @@ &sdhci {
 	no-sd;
 	non-removable;
 	max-frequency = <200000000>;
-	mmc-hs400-1_8v;
-	mmc-hs400-enhanced-strobe;
+	mmc-hs200-1_8v;
 	status = "okay";
 };
 
-- 
2.51.0