[v3,5/9] ARM64: dts: meson-gxl: libretech-cc: add card regulator settle times

Message ID 20170831135226.19784-6-jbrunet@baylibre.com
State New
Headers show
Series
  • ARM64: dts: meson: update around mmc
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Commit Message

Jerome Brunet Aug. 31, 2017, 1:52 p.m.
Changing the card voltage on the cc is not instantaneous, especially
when switching from 3.3v to 1.8v.

It take at least 30ms 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: 61ff2af9b278 ("ARM64: dts: fixup libretech cc definition")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

---
 arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.9.5

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Patch

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
index a014c052241e..7d252168c2fa 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
@@ -91,6 +91,9 @@ 
 
 		states = <3300000 0>,
 			 <1800000 1>;
+
+		regulator-settling-time-up-us = <200>;
+		regulator-settling-time-down-us = <50000>;
 	};
 
 	vddio_boot: regulator-vddio_boot {