Re: [PATCH v6 3/8] watchdog: hpe-wdt: Introduce HPE GXP Watchdog

[Arnd Bergmann]

On Tue, May 3, 2022 at 6:53 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:

> > Just to clarify for my understanding are you asking that in the device structure I use the "void *platform_data" to pass "struct *resource"? If I am incorrect here can you elaborate on what you would like to be done? Based on feedback in review for the device tree; the watchdog is being created as a child to the timer. Therefore the conclusion reached was there should not be a gxp-wdt listed in the device tree files. I took this implementation based on what I found in ixp4xx_wdt.c.
> >
>
> One bad deed tends to multiply.
>
> No, I didn't ask to pass a struct resource as platform data.
> That would be no different to the current code. Resources
> can be added to a platform device using
> platform_device_add_resources(), and the platform driver
> can then use platform_get_resource() to use it. This
> would make it independent of a "private" mechanism.

Unfortunately there is no resource type for __iomem tokens,
only for physical addresses, so you'd end up having to do
ioremap() of the same address twice to map it into both the
timer and the watchdog driver . Not the end of the world
of course, but that doesn't seem much better than abusing the
device private data.

       Arnd