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ARM: dts: imx: Set default tuning step for imx6sx usdhc

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[ Upstream commit 0a2b96e42a ]

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

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/imx6sx.dtsi#L1108-L1109

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaolei Wang 2023-07-26 15:57:47 +08:00 • committed by Justin Hammond
parent 06a56e1d24
commit 944a3ef544
1 changed files with 6 additions and 0 deletions
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6
arch/arm/boot/dts/imx6sx.dtsi
View file

@ -981,6 +981,8 @@
<&clks IMX6SX_CLK_USDHC1>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-start-tap = <20>;
fsl,tuning-step= <2>;
status = "disabled";
};
@ -993,6 +995,8 @@
<&clks IMX6SX_CLK_USDHC2>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-start-tap = <20>;
fsl,tuning-step= <2>;
status = "disabled";
};
@ -1005,6 +1009,8 @@
<&clks IMX6SX_CLK_USDHC3>;
clock-names = "ipg", "ahb", "per";
bus-width = <4>;
fsl,tuning-start-tap = <20>;
fsl,tuning-step= <2>;
status = "disabled";
};