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arm64: dts: add off-on-delay-us for usdhc2 regulator

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For SD card, according to the spec requirement, for sd card power reset
operation, it need sd card supply voltage to be lower than 0.5v and keep
over 1ms, otherwise, next time power back the sd card supply voltage to
3.3v, sd card can't support SD3.0 mode again.

To match such requirement on imx8qm-mek board, add 4.8ms delay between
sd power off and power on.

Fixes: 307fd14d4b ("arm64: dts: imx: add imx8qm mek support")
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Haibo Chen 2025-11-19 11:22:40 +08:00 committed by Shawn Guo
parent e0d8678c2f
commit ca643894a3
1 changed files with 1 additions and 0 deletions
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arch/arm64/boot/dts/freescale/imx8qm-mek.dts
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@ -263,6 +263,7 @@ reg_usdhc2_vmmc: usdhc2-vmmc {
regulator-max-microvolt = <3000000>;
gpio = <&lsio_gpio4 7 GPIO_ACTIVE_HIGH>;
enable-active-high;
off-on-delay-us = <4800>;
};
reg_audio: regulator-audio {