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SubjectRe: [PATCH 2/7] gpiolib: Support purely name based gpiod lookup in device trees
Hi Linus,

On Tue, Apr 22, 2014 at 05:00:17PM +0200, Linus Walleij wrote:
> On Tue, Apr 15, 2014 at 8:41 AM, Chen-Yu Tsai <> wrote:
> > This patch enables gpio-names based gpiod lookup in device tree usage,
> > which ignores the index passed to gpiod_get_index. If this fails, fall
> > back to the original function-index ("con_id"-gpios) based lookup scheme,
> > for backward compatibility and any drivers needing more than one GPIO
> > for any function.
> >
> > Signed-off-by: Chen-Yu Tsai <>
> This looks a bit scary and I cannot claim to realize the entire semantic
> effect of this patch, but if it's the way to go then OK.
> Acked-by: Linus Walleij <>
> Shall I just apply this to the GPIO tree or are you carrying it along with
> the other stuff?

This patch has a dependency on the first patch of this serie, since it
uses a binding that was documented there.

Maybe you'll want to wait for the ACK from the DT maintainers to merge
this one.


Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
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