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zbt-wd323: add GPIO WDT support

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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>
This commit is contained in:
Joshua O'Leary 2023-06-07 11:32:22 +01:00 committed by Chuanhong Guo
parent 0bbd5699c8
commit 008cc836fe
1 changed files with 8 additions and 0 deletions
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8
target/linux/ath79/dts/ar9344_zbtlink_zbt-wd323.dts
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@ -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 {