u-boot-brain/arch/arm/dts/imx6q-bx50v3-uboot.dtsi
Sebastian Reichel 4ac026a937 board: ge: bx50v3: add phy reset GPIO
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>
2021-05-02 12:46:54 +02:00

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// SPDX-License-Identifier: GPL-2.0+ OR X11
/*
* Copyright 2019 Collabora Ltd
* Copyright 2019 General Electric Company
*/
/ {
bootcount {
compatible = "u-boot,bootcount-i2c-eeprom";
i2c-eeprom = <&bootcount>;
};
wdt-reboot {
compatible = "wdt-reboot";
wdt = <&wdog1>;
};
panel-lvds0 {
compatible = "simple-panel";
};
};
&eeprom {
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
vpd@0 {
reg = <0 800>;
};
bootcount: bootcount {
reg = <1022 2>;
};
};
};
/*
* 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>;
};