linux-kernel - Re: [RFC PATCH] pinctrl: add helper to expose pinctrl state in debugfs

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Message-ID: <CAHp75VdGEe9F69=uzaDiCf9C8byh6ThuCJLMch1dBXEH4MA2Sg@mail.gmail.com>
Date:   Tue, 15 Dec 2020 21:39:18 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Drew Fustini <drew@...gleboard.org>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tony Lindgren <tony@...mide.com>
Subject: Re: [RFC PATCH] pinctrl: add helper to expose pinctrl state in debugfs

On Tue, Dec 15, 2020 at 9:36 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
> On Mon, Dec 14, 2020 at 11:44 PM Drew Fustini <drew@...gleboard.org> wrote:
> > On Mon, Dec 14, 2020 at 07:55:12PM +0200, Andy Shevchenko wrote:

...

> > With regards to parent directory, I did discover there is
> > debugfs_lookup(), so I can get the dentry for "pinctrl" and create new
> > subdirectory inside of it.  This is the structure now:
> >
> > /sys/kernel/debug/pinctrl/pinctrl_state/ocp:P2_35_pinmux/state
> > /sys/kernel/debug/pinctrl/pinctrl_state/ocp:P2_34_pinmux/state
> > /sys/kernel/debug/pinctrl/pinctrl_state/ocp:P2_33_pinmux/state
> > /sys/kernel/debug/pinctrl/pinctrl_state/ocp:P2_32_pinmux/state
> > etc..

Missed part to comment.

I was talking about

/sys/kernel/debug/pinctrl/<$PINCTRL>/mux/<$PIN> (maybe folder, maybe node)

-- 
With Best Regards,
Andy Shevchenko