On October 17, 2014 2:16:00 PM CEST, "Rafael J. Wysocki" <[email protected]>
wrote:
>From: Mika Westerberg <[email protected]>
>
>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]_get_named_gpiod_from_child() that takes a child firmware
>node pointer as its second argument (the first one is the parent device
>itself), finds the GPIO using whatever is the underlying firmware
>method, and requests the GPIO properly.
Could we also have a wrapper around this function without a "name" argument,
using just the index?
Arnd
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