[openwrt/openwrt] realtek: EnGenius EWS2910P: declare and hog the poe-enable GPIO

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/36acb3db03a3cf7dee80a1fc3b6f8f70efd20294

commit 36acb3db03a3cf7dee80a1fc3b6f8f70efd20294
Author: Alexandru Gagniuc <mr.nuke.me at gmail.com>
AuthorDate: Sat May 21 21:59:10 2022 -0500

    realtek: EnGenius EWS2910P: declare and hog the poe-enable GPIO
    
    GPIO 1 on the RTL8231 is used to force the PoE MCU to disable power
    outputs. It is not used by any driver, but if accidentally set low,
    PoE outputs are disabled. This situation is hard to debug, and
    requires knowledge of the Broadcom PoE protocol used by the MCU.
    
    To prevent this situation, hog it as an output high. This is
    consistent with the ZyXel GS1900 series handles it.
    
    Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
---
 target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts b/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
index f87c9585f9..dd57b2bf48 100644
--- a/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
+++ b/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
@@ -43,6 +43,13 @@
 		gpio-controller;
 		indirect-access-bus-id = <0>;
 
+		poe_enable {
+			gpio-hog;
+			gpios = <1 GPIO_ACTIVE_HIGH>;
+			output-high;
+			line-name = "poe-enable";
+		};
+
 		sff_p9_gpios {
 			gpio-hog;
 			gpios = < 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>,