Commit ca643894 authored by Haibo Chen's avatar Haibo Chen Committed by Shawn Guo
Browse files

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



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: 307fd14d ("arm64: dts: imx: add imx8qm mek support")
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarHaibo Chen <haibo.chen@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent e0d8678c

arch/arm64/boot/dts/freescale/imx8qm-mek.dts

+1 −0
Original line number Diff line number Diff line
@@ -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 {