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

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[ Upstream commit 2511366797 ]

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: 94dcfdc77f ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jernej Skrabec
2019-09-09 20:42:35 +02:00
committed by Greg Kroah-Hartman
parent dc24ac36f3
commit a3a208ac46
1 changed files with 9 additions and 0 deletions
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9
arch/arm64/boot/dts/allwinner/sun50i-a64-pine64-plus.dts
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@@ -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>;
};