On Fri, 5 Nov 2021 19:34:31 +0100 Heinrich Schuchardt heinrich.schuchardt@canonical.com wrote:

The Sunxi boards only support a 16 second watchdog timeout. This is too short to boot Linux. The UEFI specification requires 300 seconds as default timeout.

As detailed in this thread here [1], I would argue that always keeping the watchdog running at all *after* U-Boot handed off (either via booti/bootz/bootm or via ExitBootServices) sounds questionable to me, especially when this wasn't the case so far. The Linux kernel boot protocols (for arm and arm64) do not speak about a watchdog, it would be interesting to see what's the expectation is here.

Anyway we run into real issues with current HEAD, and be it for the short period, so disabling it by default is the right way, at least for now.

Change the default for CONFIG_WATCHDOG_AUTOSTART for ARCH_SUNXI.

Fixes: b147bd3607f8 ("sunxi: Enable watchdog timer support by default") Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com

Tested-by: Andre Przywara andre.przywara@arm.com

Cheers, Andre

---

drivers/watchdog/Kconfig | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index d306054a8c..1177f17fd8 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -12,6 +12,7 @@ config WATCHDOG config WATCHDOG_AUTOSTART bool "Automatically start watchdog timer" depends on WDT

• default n if ARCH_SUNXI default y help Automatically start watchdog timer and start servicing it during