diff mbox series

[1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times

Message ID 20170804180816.18737-2-jbrunet@baylibre.com
State Superseded
Headers show
Series ARM64: dts: meson: update around mmc | expand

Commit Message

Jerome Brunet Aug. 4, 2017, 6:08 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(+)

-- 
2.9.4
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 fa462831ccaf..6b7495dc6014 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 {