[openwrt/openwrt] realtek: add PoE enable line to Netgear GS110TPP

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/807074309dff4eff4097900b9de53abce8684e2f

commit 807074309dff4eff4097900b9de53abce8684e2f
Author: Sander Vanheule <sander at svanheule.net>
AuthorDate: Mon Jan 27 22:17:57 2025 +0100

    realtek: add PoE enable line to Netgear GS110TPP
    
    By switching to the new RTL8231 driver in commit b7af54d5c18c ("realtek:
    Simple conversions to RTL8231 MFD driver"), the bootloader state of the
    RTL8231's pins is now maintained. As the bootloader de-asserts the PoE
    enable signal, this means PoE output is no longer available.
    
    Add a gpio-hog with high output, restoring the line value from when the
    pin was configured (by default) as an input with a pull-up resistor.
    This will hard-enable the PoE output, but the individual ports can still
    be administratively disabled by realtek-poe or a similar tool.
    
    Signed-off-by: Sander Vanheule <sander at svanheule.net>
---
 target/linux/realtek/dts/rtl8380_netgear_gs110tpp-v1.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/target/linux/realtek/dts/rtl8380_netgear_gs110tpp-v1.dts b/target/linux/realtek/dts/rtl8380_netgear_gs110tpp-v1.dts
index f694ae3317..d25b81c3cb 100644
--- a/target/linux/realtek/dts/rtl8380_netgear_gs110tpp-v1.dts
+++ b/target/linux/realtek/dts/rtl8380_netgear_gs110tpp-v1.dts
@@ -37,6 +37,15 @@
 	};
 };
 
+&gpio1 {
+	poe-enable {
+		gpio-hog;
+		gpios = <10 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "poe-enable";
+	};
+};
+
 &firmware {
 	openwrt,ih-magic = <0x4e474520>;
 };