From 568135ba2a240d7cd5a8b759a13387531d937458 Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Tue, 3 Mar 2020 15:59:04 +0800 Subject: [PATCH] arm64: dts: imx8mn-evk: change to use off-on-delay-us in regulator After commit f7907e57aea2 ("regulator: fixed: add off-on-delay"), user can use "off-on-delay-us" to define the regulator off-delay time. 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. This patch add the off-on-delay-us to each board, make sure the sd power reset behavior is align with the specification. Without this patch, when do quick system suspend/resume test, some sd card can't work at SD3.0 mode after system resume back. Signed-off-by: Haibo Chen Acked-by: Leonard Crestez Signed-off-by: Anson Huang --- arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi index 0ba61bad9d25..a5c829fe1069 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi @@ -51,6 +51,7 @@ regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>; + off-on-delay-us = <12000>; enable-active-high; }; -- 2.17.1