linux-kernel - [PATCH] ARM: dts: imx: Set default tuning step for imx7d usdhc0

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Date:   Sat, 22 Jul 2023 07:21:23 +0800
From:   Xiaolei Wang <xiaolei.wang@...driver.com>
To:     robh+dt@...nel.org, conor+dt@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com
Cc:     linux-imx@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: dts: imx: Set default tuning step for imx7d usdhc0

If the tuning step is not set, the tuning step is set to 1.
For some sd cards, the following Tuning timeout will occur,
so set the default tuning step.

Tuning failed, falling back to fixed sampling clock
mmc0: Tuning failed, falling back to fixed sampling clock

Fixes: 1e336aa0c025 ("mmc: sdhci-esdhc-imx: correct the tuning start tap and step setting")
Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>
---
 arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts b/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
index 75f1cd14bea1..d7396fbfcaf8 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx7d-sdb.dts
@@ -493,6 +493,7 @@ &usdhc1 {
 	vmmc-supply = <&reg_sd1_vmmc>;
 	wakeup-source;
 	keep-power-in-suspend;
+	fsl,tuning-step = <2>;
 	status = "okay";
 };
 
-- 
2.25.1