redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

arm64: dts: allwinner: a64: sopine-baseboard: Add PHY regulator delay 

It turns out that sopine-baseboard needs same fix as pine64-plus
for ethernet PHY. Here too Realtek ethernet PHY chip needs additional
power on delay to properly initialize. Datasheet mentions that chip
needs 30 ms to be properly powered on and that it needs some more time
to be initialized.

Fix that by adding 100ms ramp delay to regulator responsible for
powering PHY.

Note that issue was found out and fix tested on pine64-lts, but it's
basically the same as sopine-baseboard, only layout and connectors
differ.

Fixes: bdfe4cebea ("arm64: allwinner: a64: add Ethernet PHY regulator for several boards")
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
zero-colors
Jernej Skrabec 2019-09-29 10:52:59 +02:00 committed by Maxime Ripard
parent ed3e9406bc
commit ccdf3aaa27
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm64/boot/dts/allwinner/sun50i-a64-sopine-baseboard.dts
View File

@ -159,6 +159,12 @@
};
&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>;
regulator-name = "vcc-phy";
};