From: Haibo Chen Date: Wed, 19 Nov 2025 03:22:40 +0000 (+0800) Subject: arm64: dts: add off-on-delay-us for usdhc2 regulator X-Git-Tag: v6.19-rc5~17^2~1^2~9 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca643894a37a25713029b36cfe7d1bae515cac08;p=thirdparty%2Flinux.git 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: 307fd14d4b14 ("arm64: dts: imx: add imx8qm mek support") Reviewed-by: Frank Li Signed-off-by: Haibo Chen Signed-off-by: Shawn Guo --- diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts index 667ba2fea867..f1b0563d3a09 100644 --- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts +++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts @@ -263,6 +263,7 @@ regulator-max-microvolt = <3000000>; gpio = <&lsio_gpio4 7 GPIO_ACTIVE_HIGH>; enable-active-high; + off-on-delay-us = <4800>; }; reg_audio: regulator-audio {