Re: [RFC PATCH v2 07/16] gpio: Add support for unified device properties interface

Linus Walleij
2014-09-23T15:25:53Z

On Tue, Sep 16, 2014 at 1:52 PM, Mika Westerberg
<mika.westerberg@linux.intel.com> wrote:

> Some drivers need to deal with only firmware representation of its
> GPIOs. An example would be a GPIO button array driver where each button
> is described as a separate firmware node in device tree. Typically these
> child nodes do not have physical representation in the Linux device
> model.
>
> In order to help device drivers to handle such firmware child nodes we
> add dev[m]_node_get_named_gpiod() that takes a firmware node pointer as
> parameter, finds the GPIO using whatever is the underlying firmware
> method, and requests the GPIO properly.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

I have a hard time figuring out if this is what we want for common
accessors between DT and ACPI.

Can I get some input from Grant, Arnd, Mark, Darren...?

Yours,
Linus Walleij