Re: [RFC Patch] gpio: add GPIO hogging mechanism

[Linus Walleij]

On Wed, Oct 29, 2014 at 8:09 AM, Alexandre Courbot <gnurou@xxxxxxxxx> wrote:
> On Wed, Oct 22, 2014 at 5:09 AM, Benoit Parrot <bparrot@xxxxxx> wrote:

> +               line_b: line_b {
> +                       line_b {
> +                               gpios = <6 0>;
> +                               output-low;
> +                               line-name = "foo-bar-gpio";
> +                       };
> +               };
>
(...)
>
> I wonder if such usage of child nodes could not interfere with GPIO
> drivers (existing or to be) that need to use child nodes for other
> purposes. Right now there is no way to distinguish a hog node from a
> node that serves another purpose, and that might become a problem in
> the future.

Yes, so I have suggested a hog-something; keyword in there.

As long as the children don't have any compatible-strings we can
decide pretty much how they should be handled internally.

Are there custom drivers with child nodes inside the main chip
today?

Yours,
Linus Walleij
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