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arm64: dts: imx91-11x11-evk: change usdhc tuning step for eMMC and SD

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During system resume, the following errors occurred:

  [  430.638625] mmc1: error -84 writing Cache Enable bit
  [  430.643618] mmc1: error -84 doing runtime resume

For eMMC and SD, there are two tuning pass windows and the gap between
those two windows may only have one cell. If tuning step > 1, the gap may
just be skipped and host assumes those two windows as a continuous
windows. This will cause a wrong delay cell near the gap to be selected.

Set the tuning step to 1 to avoid selecting the wrong delay cell.

For SDIO, the gap is sufficiently large, so the default tuning step does
not cause this issue.

Fixes: 6772c4cffd ("arm64: dts: freescale: add i.MX91 11x11 EVK basic support")
Signed-off-by: Luke Wang <ziniu.wang_1@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Luke Wang 2026-02-03 19:23:10 +08:00 committed by Frank Li
parent 12f56ee0ad
commit 5ab0c76df2
1 changed files with 2 additions and 0 deletions
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arch/arm64/boot/dts/freescale/imx91-11x11-evk.dts
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@ -514,6 +514,7 @@ &usdhc1 {
pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
pinctrl-names = "default", "state_100mhz", "state_200mhz";
fsl,tuning-step = <1>;
status = "okay";
};
@ -528,6 +529,7 @@ &usdhc2 {
pinctrl-3 = <&pinctrl_usdhc2_sleep>, <&pinctrl_usdhc2_gpio_sleep>;
pinctrl-names = "default", "state_100mhz", "state_200mhz", "sleep";
vmmc-supply = <&reg_usdhc2_vmmc>;
fsl,tuning-step = <1>;
status = "okay";
};