[openwrt/openwrt] realtek: Enable Zyxel GS1900's RTL8231 reset line

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/b2d17dbb68c232393739e6fb48245f1f4bebb698

commit b2d17dbb68c232393739e6fb48245f1f4bebb698
Author: Sander Vanheule <sander at svanheule.net>
AuthorDate: Tue Jan 21 19:37:25 2025 +0100

    realtek: Enable Zyxel GS1900's RTL8231 reset line
    
    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 at svanheule.net>
---
 target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi b/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
index 927b9527a9..6ab3e4834a 100644
--- a/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
+++ b/target/linux/realtek/dts/rtl8380_zyxel_gs1900.dtsi
@@ -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 at 0 {
 		compatible = "realtek,rtl8231";