linux-kernel - Re: [PATCH] ARM: dts: document pinctrl-single,pins when #pinctrl-cells = 2

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Message-ID: <20200924054324.GB9471@atomide.com>
Date:   Thu, 24 Sep 2020 08:43:24 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Trent Piepho <tpiepho@...il.com>
Cc:     Drew Fustini <drew@...gleboard.org>,
        Rob Herring <robh+dt@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jason Kridner <jkridner@...gleboard.org>,
        Robert Nelson <robertcnelson@...il.com>,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        linux-gpio <linux-gpio@...r.kernel.org>,
        Christina Quast <cquast@...overdisplays.com>
Subject: Re: [PATCH] ARM: dts: document pinctrl-single,pins when
 #pinctrl-cells = 2

* Trent Piepho <tpiepho@...il.com> [200924 01:34]:
> On Tue, Sep 22, 2020 at 11:57 PM Tony Lindgren <tony@...mide.com> wrote:
> >
> > Also FYI, folks have also complained for a long time that the pinctrl-single
> > binding mixes mux and conf values while they should be handled separately.
> >
> 
> Instead of combining two fields when the dts is generated they are now
> combined when the pinctrl-single driver reads the dts.  Other than
> this detail, the result is the same.  The board dts source is the
> same.  The value programmed into the pinctrl register is the same.
> There is no mechanism currently that can alter that value in any way.
> 
> What does combining them later allow that is not possible now?

It now allows further driver changes to manage conf and mux separately :)

Regards,

Tony