Messages in this thread | | | Subject | Re: [PATCH v5 10/12] gpio: Support for unified device properties interface | From | Arnd Bergmann <> | Date | Fri, 17 Oct 2014 20:09:51 +0200 |
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On October 17, 2014 2:16:00 PM CEST, "Rafael J. Wysocki" <rjw@rjwysocki.net> wrote: >From: Mika Westerberg <mika.westerberg@linux.intel.com> > >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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