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board: ge: bx50v3: add phy reset GPIO

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Add PHY's reset GPIO, so that U-Boot does a PHY hard reset.
This is needed, since the PHY might become unresponsive if
watchdog reboots the system while a transaction is ongoing.

The reset GPIO is added to the U-Boot specific DT files, since
the kernel does not setup the reserved registers correctly after
resetting the PHY and thus must not reset it.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sebastian Reichel 2021-04-23 16:15:08 +02:00 • committed by Stefano Babic
parent 512bda95ed
commit 4ac026a937
1 changed files with 12 additions and 0 deletions
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12
arch/arm/dts/imx6q-bx50v3-uboot.dtsi
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@ -35,3 +35,15 @@
};
};
};
/*
* This is not done in imx6q-ba16.dtsi, since that file is shared
* with the kernel and the kernel should not reset the PHY, since
* it lacks support for configuring the reserved registeres to
* avoid a board specific voltage peak issue.
*/
&fec {
phy-reset-gpios = <&gpio1 28 GPIO_ACTIVE_LOW>;
phy-reset-duration = <1>;
phy-reset-post-delay = <0>;
};