[PATCH 1/7] gpiolib: gpiolib-of: Implement device tree gpio-names based lookup

[Alexandre Courbot]

On Wed, Apr 16, 2014 at 3:12 PM, Alexandre Courbot <gnurou at gmail.com> wrote:
> On Tue, Apr 15, 2014 at 11:20 PM, Maxime Ripard
> <maxime.ripard at free-electrons.com> wrote:
>> Hi Chen-Yu,
>>
>> On Tue, Apr 15, 2014 at 02:41:35PM +0800, Chen-Yu Tsai wrote:
>>> This patch provides of_get_gpiod_flags_by_name(), which looks up GPIO
>>> phandles by name only, through gpios/gpio-names, and not by index.
>>
>> IIRC, gpios only uses the *-gpios properties, and not gpios/gpio-names
>> pattern seen on various other things.
>>
>> Is it some new property you introduce? If so, please add it to the
>> documentation.
>>
>> Now, I'm not sure that having two distinct representations of GPIOs in
>> the DT is a good thing. Yes, it's looking odd compared to other
>> similar bindings, but it's what we have to deal with.
>
> Mmmm I *think* I somehow remember a discussion about this topic
> recently, but I cannot find it. Maybe Chen-yu could point us to the
> conclusion of this discussion and the rationale for (re)implementing
> named GPIOs this way?

Aha, here maybe:

https://lkml.org/lkml/2014/1/21/164

However I don't see a clear conclusion that we should implement that
scheme. Not that I am strongly against it, but I'd like to see a
practical purpose for it.