Re: omap watchdog boot status

[Guenter Roeck <linux@roeck-us.net>]

On 11/07/2016 06:26 AM, Cor Peters wrote:
> Hello everybody
>
> I was looking into an issue with the omap-wdt.c. The  watchdog driver not is
> reporting a different boot status when a reset is being triggered by the
> watchdog.
>
>>From what I gathered, the issue is that in the omap_wdt_probe function,
> pdev->dev->platform_data requires to be a reference to the PRM module,
> however it has not been set, and I was wondering how this should work in
> an environment that uses the device tree method. (Link to usage:
> http://lxr.free-electrons.com/source/drivers/watchdog/omap_wdt.c#L268[1] ).
>
> My questions are as follows:
> 1) Is my assertion correct that the current method does not work when
>   the driver is being initialised from an device tree instead of a old style
>   board file.

I think you are correct.

> 2) If that is the case, what would be the best method of fixing this situation.
>
I am not a devicetree expert, but you may have to define a property to point to
the register and bit providing the necessary information. This could possibly
be done with syscon, but I really don't know enough about it to really know for
sure what the best approach would be.

Guenter