Unverified Commit 25113667 authored Sep 09, 2019 by Jernej Skrabec Committed by Maxime Ripard Sep 30, 2019

arm64: dts: allwinner: a64: pine64-plus: Add PHY regulator delay



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: 94dcfdc7 ("arm64: allwinner: pine64-plus: Enable dwmac-sun8i")
Suggested-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <mripard@kernel.org>

parent 54ecb8f7

arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts

+9 −0

Original line number	Diff line number	Diff line
		@@ -63,3 +63,12 @@
		reg = <1>;
		};
		};

		&reg_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>;
		};