From: Jerome Brunet <jbrunet@baylibre.com>
Date: Thu, 31 Aug 2017 13:52:21 +0000 (+0200)
Subject: ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=42776561a1def5d96699574efd7c9cbbd2e0fbc4;p=openwrt%2Fstaging%2Fblogic.git

ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times

Changing the card voltage on the nanopi-k2 is not instantaneous,
especially when switching from 3.3v to 1.8v.

It take at least 3ms for the regulator to go from 3.3v to 1.8v. Add
margin to that to make sure we don't upset the sdcard during the voltage
switch

Fixes: 9bc7ffb08daf ("arm64: dts: amlogic: Add NanoPi K2")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
---

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
index 60d5f2da6916..acb6797756e5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
@@ -107,6 +107,9 @@
 
 		states = <3300000 0>,
 		         <1800000 1>;
+
+		regulator-settling-time-up-us = <100>;
+		regulator-settling-time-down-us = <5000>;
 	};
 
 	wifi_32k: wifi-32k {