linux-kernel - Re: [PATCH 11/20] gpio/rockchip: add of

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Message-ID: <CACRpkdbA_h4m0cY98=0C2fCbTYEtowFRm9RF=tv=XSgjKxjcAQ@mail.gmail.com>
Date:   Tue, 4 Oct 2022 11:06:29 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Jianqun Xu <jay.xu@...k-chips.com>, heiko@...ech.de, brgl@...ev.pl,
        robert.moore@...el.com, robh@...nel.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        lenb@...nel.org, rafael@...nel.org
Subject: Re: [PATCH 11/20] gpio/rockchip: add of_node for gpiochip

On Tue, Oct 4, 2022 at 10:30 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> On Tue, Oct 04, 2022 at 09:14:38AM +0200, Linus Walleij wrote:
> > On Tue, Sep 20, 2022 at 12:31 PM Jianqun Xu <jay.xu@...k-chips.com> wrote:
> > > The Rockchip GPIO driver will probe before pinctrl and has no parent dt
> > > node, lack of the of_node will cause the driver probe failure.
> > >
> > > Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
> >
> > > +#ifdef CONFIG_OF_GPIO
> > > +       gc->of_node = of_node_get(bank->dev->of_node);
> > > +#endif
> >
> > Any introduction of of_node_get() needs to be balanced with a
> > corresponding of_node_put().
>
> No, this code should not have been existed in the first place. We don't allow
> anymore any of of_node usage in the GPIO drivers. There is an fwnode and parent
> and logic to retrieve fwnode from parent in the GPIO library for the most of
> the cases.

Hm yeah given that the series want to introduce ACPI as well it makes
a lot of sense.

Yours,
Linus Walleij