From ac4cf9a2e32cfd397eb616729e866b5414dcf024 Mon Sep 17 00:00:00 2001 From: AngeloGioacchino Del Regno Date: Thu, 9 Jun 2022 13:22:57 +0200 Subject: [PATCH] arm64: dts: mediatek: mt6795: Add watchdog node to avoid timeouts At least on commercial devices like some smartphones, the bootloader will initialize the SoC watchdog and set it to reboot the board when it times out. The last pet that this watchdog is getting is right before booting the kernel and left it enabled as a protection against boot failure: this means that Linux is expected to initialize this device and pet as soon as possible, or it will bark and reset the AP. In order to prevent that, add the required watchdog node as default enabled: this will have no side effects on boards that are not performing the aforementioned watchdog setup before booting Linux. Signed-off-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20220609112303.117928-5-angelogioacchino.delregno@collabora.com Signed-off-by: Matthias Brugger --- arch/arm64/boot/dts/mediatek/mt6795.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt6795.dtsi b/arch/arm64/boot/dts/mediatek/mt6795.dtsi index 639104b..363fa25 100644 --- a/arch/arm64/boot/dts/mediatek/mt6795.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt6795.dtsi @@ -188,6 +188,14 @@ compatible = "simple-bus"; ranges; + watchdog: watchdog@10007000 { + compatible = "mediatek,mt6795-wdt"; + reg = <0 0x10007000 0 0x100>; + interrupts = ; + #reset-cells = <1>; + timeout-sec = <20>; + }; + sysirq: intpol-controller@10200620 { compatible = "mediatek,mt6795-sysirq", "mediatek,mt6577-sysirq"; -- 2.7.4