[PATCH v7 1/1] drivers: watchdog: revise watchdog bootstatus

[Andrew Jeffery <andrew@codeconstruct.com.au>]

On Thu, 2024-04-25 at 17:07 +0800, Peter Yin wrote:
> Regarding the AST2600 specification, the WDTn Timeout Status Register
> (WDT10) has bit 1 reserved. Bit 1 of the status register indicates
> on ast2500 if the boot was from the second boot source.
> It does not indicate that the most recent reset was triggered by
> the watchdog. The code should just be changed to set WDIOF_CARDRESET
> if bit 0 of the status register is set. However, this bit can be clear when
> watchdog register 0x0c bit1(Reset System after timeout) is enabled.
> Thereforce include SCU register to veriy WDIOF_EXTERN1 and WDIOF_CARDRESET
> in ast2600 SCU74 or ast2400/ast2500 SCU3C.
> 
> Signed-off-by: Peter Yin <peteryin.openbmc@gmail.com>
> ---
>  drivers/watchdog/aspeed_wdt.c | 109 ++++++++++++++++++++++++++++++++--
>  1 file changed, 103 insertions(+), 6 deletions(-)

After this patch the probe() implementation is ~250loc with a whole
bunch of conditional behaviours based on the SoC version. Maybe it's
time to break it up into version-specific functions that are called
from the probe() implementation?

Andrew