diff mbox series

[v3,4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times

Message ID 20170831135226.19784-5-jbrunet@baylibre.com
State Accepted
Commit 42776561a1def5d96699574efd7c9cbbd2e0fbc4
Headers show
Series [v3,1/9] ARM64: dts: meson-gx: Use correct mmc clock source 0 | expand

Commit Message

Jerome Brunet Aug. 31, 2017, 1:52 p.m. UTC 
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>

---
 arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.9.5
diff mbox series

Patch

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 {