On Tue, Sep 16, 2014 at 1:52 PM, Mika Westerberg
[off-list ref] 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-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

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
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