From: Joshua O'Leary <josh.oleary@mobile-power.co.uk>
Date: Wed, 7 Jun 2023 10:32:22 +0000 (+0100)
Subject: zbt-wd323: add GPIO WDT support
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fbb4aac69bde73051f95d3ebc9a10a8feb8fdfd9;p=openwrt%2Fstaging%2Fjow.git

zbt-wd323: add GPIO WDT support

Watchdog has not been properly configured for this router - the PCB has a
hardware watchdog connected to one of the GPIO pin 21 [1]
This commit provides this fix [2]

Without this fix, the ZBT-WD323 is unusable in OpenWRT because it power
cycles every 30 seconds due to the watchdog tripping

[1] https://forum.openwrt.org/t/zbt-wd323-router-power-cycles-every-30-seconds/77535/7
[2] https://forum.openwrt.org/t/zbt-wd323-images-unusable-proposed-workaround/162145/5

Signed-off-by: Joshua O'Leary <josh.oleary@mobile-power.co.uk>
(cherry picked from commit 008cc836fe42577af2843730dfefd31b750c7de6)
---

diff --git a/target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts b/target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts
index 8fc21be1dc..8dc1ceb666 100644
--- a/target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts
+++ b/target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts
@@ -59,6 +59,14 @@
 			gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
 		};
 	};
+	
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
+		hw_algo = "toggle";
+		hw_margin_ms = <30000>;
+		always-running;
+	};
 };
 
 &wdt {