From ca643894a37a25713029b36cfe7d1bae515cac08 Mon Sep 17 00:00:00 2001 From: Haibo Chen Date: Wed, 19 Nov 2025 11:22:40 +0800 Subject: [PATCH] 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 --- arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 1 + 1 file changed, 1 insertion(+) 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 { -- 2.47.3