linux-kernel - [PATCH] arm64: dts: rockchip: add enable-strobe-pulldown to emmc phy on nanopi4

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Date:   Wed, 28 Sep 2022 17:11:29 +0800
From:   Jensen Huang <jensenhuang@...endlyarm.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Vinod Koul <vkoul@...nel.org>,
        Chris Ruehl <chris.ruehl@...ys.com.hk>
Cc:     Jensen Huang <jensenhuang@...endlyarm.com>,
        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: add enable-strobe-pulldown to emmc phy on nanopi4

Internal pull-down for strobe line (GRF_EMMCPHY_CON2[9]) was disabled
by commit 8b5c2b45b8f0, which causes I/O error in HS400 mode.

Tested on NanoPC-T4.

Fixes: 8b5c2b45b8f0 ("phy: rockchip: set pulldown for strobe line in dts")
Signed-off-by: Jensen Huang <jensenhuang@...endlyarm.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
index 278123b4f911..b6e082f1f6d9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi4.dtsi
@@ -167,6 +167,7 @@ &cpu_l3 {
 };
 
 &emmc_phy {
+	rockchip,enable-strobe-pulldown;
 	status = "okay";
 };
 
-- 
2.37.0