kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

arm64: dts: mediatek: mt6795: Add watchdog node to avoid timeouts

Browse source 
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 <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220609112303.117928-5-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
AngeloGioacchino Del Regno 2022-06-09 13:22:57 +02:00 • committed by Matthias Brugger
parent 5fce1e6cc0
commit ac4cf9a2e3
1 changed files with 8 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

8
arch/arm64/boot/dts/mediatek/mt6795.dtsi
View file

@ -188,6 +188,14 @@
compatible = "simple-bus";
ranges;
watchdog: watchdog@10007000 {
compatible = "mediatek,mt6795-wdt";
reg = <0 0x10007000 0 0x100>;
interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_LOW>;
#reset-cells = <1>;
timeout-sec = <20>;
};
sysirq: intpol-controller@10200620 {
compatible = "mediatek,mt6795-sysirq",
"mediatek,mt6577-sysirq";