Re: [PATCH v6 1/1] watchdog: aspeed: Update bootstatus handling

Guenter Roeck
2025-01-12T15:22:14Z

On 1/12/25 00:12, Chin-Ting Kuo wrote:
> The boot status in the watchdog device struct is updated during
> controller probe stage. Application layer can get the boot status
> through the command, cat /sys/class/watchdog/watchdogX/bootstatus.
> The bootstatus can be,
> WDIOF_CARDRESET => the system is reset by WDT SoC reset.
> Others => other reset events, e.g., power on reset.
>
> On ASPEED platform, the boot status is recorded in the SCU registers.
> - AST2400: Only a bit represents for any WDT reset.
> - AST2500/AST2600: The reset triggered by different WDT controllers
> can be distinguished by different SCU bits.
>
> Besides, on AST2400 and AST2500, since alternating boot event is
> triggered by WDT SoC reset, it is classified as WDIOF_CARDRESET.
>
> Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>