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realtek: Enable Zyxel GS1900's RTL8231 reset line

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As the bootloader is reconfiguring the RTL8231 on these devices anyway,
no pin state can be maintained over warm reboots. This results in for
example the PoE disable pin always being asserted by the bootloader.

Define the GPIO line linked to the RTL8231's reset so the MDIO subsystem
will also reset the expander on boot and ensure the line in the correct
state.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
(cherry picked from commit b2d17dbb68c232393739e6fb48245f1f4bebb698)
This commit is contained in:
Sander Vanheule 2025-01-21 19:37:25 +01:00
parent 3d26c1cae4
commit fd978c2e80
1 changed files with 3 additions and 5 deletions
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8
target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
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@ -45,11 +45,9 @@
&mdio_aux {
status = "okay";
// Reset GPIO is <&gpio0 1 GPIO_ACTIVE_LOW>
// Don't specify the reset info so the mdio subsystem doesn't reset the bus
//reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
//reset-delay-us = <1000>;
//reset-post-delay-us = <10000>;
reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
reset-delay-us = <1000>;
reset-post-delay-us = <10000>;
gpio1: expander@0 {
compatible = "realtek,rtl8231";