Re: [PATCH 4/4] gpio/rockchip: fetch deferred output settings on probe

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Sat, Sep 18, 2021 at 2:00 AM Heiko Stübner <heiko@xxxxxxxxx> wrote:

> The issue is that the pinconf part for PIN_CONFIG_OUTPUT is actually
> using the gpio controller to realize this setting. So when this ends up
> in a pinctrl-hog, stuff explodes while probing the first pinctrl part.

The Nomadik driver has something similar, I came up with a solution
ages ago which isn't elegant either, so it's not like I'm any better :/

commit ab4a936247561cd998913bab5f15e3d3eaed1f9e
"pinctrl: nomadik: assure GPIO chips are populated"

> Thinking about this, the component framework may be one option?
> And then adding a pinctr-register / init+enable variant where the
> pinctrl hogs can be aquired separately, not as part of pinctrl_enable?

Check out my commit, but the component framework is what we
should ideally use (IMO) when drivers depend on each other
so I think you are right.

Yours,
Linus Walleij