From a3a208ac460862722a38648fc60f683f697191e1 Mon Sep 17 00:00:00 2001 From: Jernej Skrabec Date: Mon, 9 Sep 2019 20:42:35 +0200 Subject: [PATCH] arm64: dts: allwinner: a64: pine64-plus: Add PHY regulator delay [ Upstream commit 2511366797fa6ab4a404b4b000ef7cd262aaafe8 ] Depending on kernel and bootloader configuration, it's possible that Realtek ethernet PHY isn't powered on properly. According to the datasheet, it needs 30ms to power up and then some more time before it can be used. Fix that by adding 100ms ramp delay to regulator responsible for powering PHY. Fixes: 94dcfdc77fc5 ("arm64: allwinner: pine64-plus: Enable dwmac-sun8i") Suggested-by: Ondrej Jirman Signed-off-by: Jernej Skrabec Signed-off-by: Maxime Ripard Signed-off-by: Sasha Levin --- arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts index 24f1aac..d5b6e81 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts @@ -63,3 +63,12 @@ reg = <1>; }; }; + +®_dc1sw { + /* + * Ethernet PHY needs 30ms to properly power up and some more + * to initialize. 100ms should be plenty of time to finish + * whole process. + */ + regulator-enable-ramp-delay = <100000>; +}; -- 2.7.4