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ARM: dts: imx: Set default tuning step for imx7d usdhc

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

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

So set the default tuning step. This refers to the NXP vendor's
commit below:

https://github.com/nxp-imx/linux-imx/blob/lf-6.1.y/
arch/arm/boot/dts/imx7s.dtsi#L1216-L1217

Fixes: 1e336aa0c0 ("mmc: sdhci-esdhc-imx: correct the tuning start tap and step setting")
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Xiaolei Wang 2023-07-24 23:45:10 +08:00 committed by Shawn Guo
parent 762b700982
commit be18293e47
1 changed files with 6 additions and 0 deletions
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6
arch/arm/boot/dts/nxp/imx/imx7s.dtsi
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@ -1184,6 +1184,8 @@ usdhc1: mmc@30b40000 {
<&clks IMX7D_USDHC1_ROOT_CLK>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-step = <2>;
fsl,tuning-start-tap = <20>;
status = "disabled";
};
@ -1196,6 +1198,8 @@ usdhc2: mmc@30b50000 {
<&clks IMX7D_USDHC2_ROOT_CLK>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-step = <2>;
fsl,tuning-start-tap = <20>;
status = "disabled";
};
@ -1208,6 +1212,8 @@ usdhc3: mmc@30b60000 {
<&clks IMX7D_USDHC3_ROOT_CLK>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-step = <2>;
fsl,tuning-start-tap = <20>;
status = "disabled";
};