Re: [PATCH 1/5] MFD/OF: document MFD devices and handle simple-mfd

[Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]

On Sat, Mar 28, 2015 at 2:41 PM, Grant Likely <grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:

> However, I think this is going to lead to a future problem. It solves
> the immediate case of getting an MFD device to be auto populated when
> the kernel doesn't need to immediately do something. However, I can
> forsee a situation where the device can be supported by simple-mfd, but
> at some point it is discovered that better features can be enabled if
> the mfd device has a proper driver.

For the general case where access to the MFD needs some mediation
or marshalling yes, I think this is theoretically possible.

For the most common MMIO case where the MFD devide is a syscon,
it is not so likely. Or rather extremelt unlikely.

We could restrict the use cases to strictly syscon/MMIO MFD devices
but it would just be a documentation fix.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html