Re: [PATCH v7 1/1] watchdog: aspeed: Update bootstatus handling

[Andrew Jeffery]

On Mon, 2025-01-13 at 17:37 +0800, 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 => System is reset due to WDT timeout occurs.
> Others          => Other reset events, e.g., power on reset.
> 
> On ASPEED platforms, boot status is recorded in the SCU registers.
> - AST2400: Only a bit is used to represent system reset triggered by
>            any WDT controller.
> - AST2500/AST2600: System reset triggered by different WDT
> controllers
>                    can be distinguished by different SCU bits.
> 
> Besides, on AST2400 and AST2500, since alternating boot event is
> also triggered by using WDT timeout mechanism, it is classified
> as WDIOF_CARDRESET.
> 
> Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@xxxxxxxxxxxxxx>

Reviewed-by: Andrew Jeffery <andrew@xxxxxxxxxxxxxxxxxxxx>