linux-kernel - Re: [PATCH v2 0/3] pinctrl: single: bit-per-mux DT flexibility, probe robustness, and consistent pinconf offsets

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Message-ID: <20260209144250.GC5376@atomide.com>
Date: Mon, 9 Feb 2026 16:42:50 +0200
From: Tony Lindgren <tony@...mide.com>
To: Linus Walleij <linusw@...nel.org>
Cc: Billy Tsai <billy_tsai@...eedtech.com>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"andrew@...econstruct.com.au" <andrew@...econstruct.com.au>,
	BMC-SW <BMC-SW@...eedtech.com>
Subject: Re: [PATCH v2 0/3] pinctrl: single: bit-per-mux DT flexibility,
 probe robustness, and consistent pinconf offsets

* Linus Walleij <linusw@...nel.org> [260209 09:51]:
> On Mon, Feb 9, 2026 at 3:25 AM Billy Tsai <billy_tsai@...eedtech.com> wrote:
> 
> > To make sure I align with your expectations:
> > 1) Would you prefer the new driver to be fully standalone (using the
> >    GENERIC_PIN* helpers + syscon/regmap-mmio), rather than trying to
> >    refactor/export helpers from pinctrl-single?
> 
> Yes. Conor improved these helpers so now it should be possible
> to use these to do a very simple and slim driver for what you
> want to do.
> 
> >    Action item: Introduce a new pinctrl-single-bit.c driver and DT
> >    binding, which can also cover the existing bit-per-mux logic currently
> >    in pinctrl-single.c.
> 
> Sounds about right.
> 
> > 2) For the syscon/regmap hookup, is it acceptable to add a syscon phandle
> >    property in DT (e.g. "syscon = <&scu>;") for the new driver to obtain
> >    the regmap, or do you prefer a different binding/property name?
> 
> This works for me.

Great, sounds good to me too!

Thanks,

Tony