Re: [RFC PATCH] gpio: support for GPIO forwarding

[David Cohen <david.a.cohen@linux.intel.com>]

Hi,

> If we decide to go ahead with the solution proposed by this patch for
> practical reasons (which are good reasons indeed), I still have one
> problem with its current form.
> 
> As the discussion highlighted, this is an ACPI problem, so I'd very
> much like it to be confined to the ACPI GPIO code, to be enabled only
> when ACPI is, and to use function names that start with acpi_gpio. The
> current implementation leverages platform lookup, making said lookup
> less efficient in the process and bringing confusion about its
> purpose. Although the two processes are indeed similar, they are
> separate things: one is a legitimate way to map GPIOs, the other is a
> fixup for broken firmware.
> 
> I suppose we all agree this is a hackish fix, so let's confine it as
> much as we can.

Are we considering MFD cases hackish as well?
i.e. if we have a driver that needs to register children devices and this
driver needs to pass GPIO to a child.

Br, David