Messages in this thread Patch in this message | | | From | Jerome Brunet <> | Subject | [PATCH 1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times | Date | Fri, 4 Aug 2017 20:08:11 +0200 |
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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(+)
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 { -- 2.9.4
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