From: Linus Walleij <linus.walleij@linaro.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Soren Brinkmann <soren.brinkmann@xilinx.com>,
Michal Simek <michal.simek@xilinx.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Alessandro Rubini <rubini@unipv.it>,
Heiko Stuebner <heiko@sntech.de>,
linux-rockchip@lists.infradead.org,
"linux-sh@vger.kernel.org" <linux-sh@vger.kernel.org>
Subject: Re: [PATCH 2/7] pinctrl: pinconf-generic: Infer map type from DT property
Date: Tue, 11 Nov 2014 13:29:36 +0100 [thread overview]
Message-ID: <CACRpkdZH9b_KB9Mz8r5vj=KGqr0bJeKMRgODUbNeBDVNr=tsCg@mail.gmail.com> (raw)
In-Reply-To: <21124316.ibhe1N9UZS@avalon>
On Wed, Nov 5, 2014 at 2:56 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Monday 03 November 2014 11:05:26 Soren Brinkmann wrote:
>> With the new 'groups' property, the DT parser can infer the map type
>> from the fact whether 'pins' or 'groups' is used to specify the pin
>> group to work on.
>> To maintain backwards compatibitliy with current usage of the DT
>> binding, this is only done when an invalid map type is passed to the
>> parsing function.
>
> The Renesas PFC implements similar bindings with using the vendor-specific
> properties "renesas,pins" and "renesas,groups" (bindings and implementation
> available at Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt
> and drivers/pinctrl/sh-pfc/pinctrl.c respectively).
>
> The Renesas implementation is a bit more generic in that it allows both pins
> and groups to be specified in a single subnode. Do you think that feature
> would make sense for pinconf-generic as well ?
I think for generic pin controllers either nodes with:
{
function = "foo";
pins = "A0", "A1", "A2";
}
or
{
function = "foo";
groups = "bar", "baz";
}
In parsing this it's easy to just look for "function" then see if
we're mapping to groups or pins.
It'd be nice if we could then centralize parsing of functions/pins/groups
and add the non-renesas-prefixed configs as alternatives to genericized
the bindings, while keeping backward compatibility.
Yours,
Linus Walleij
next prev parent reply other threads:[~2014-11-11 12:29 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-03 19:05 [PATCH 0/7] Pinctrl support for Zynq Soren Brinkmann
2014-11-03 19:05 ` [PATCH 1/7] pinctrl: pinconf-generic: Declare dt_params/conf_items const Soren Brinkmann
2014-11-11 12:00 ` Linus Walleij
2014-11-03 19:05 ` [PATCH 2/7] pinctrl: pinconf-generic: Infer map type from DT property Soren Brinkmann
2014-11-05 13:56 ` Laurent Pinchart
2014-11-05 18:09 ` Sören Brinkmann
2014-11-05 18:17 ` Laurent Pinchart
2014-11-11 12:29 ` Linus Walleij [this message]
2014-11-12 18:43 ` Sören Brinkmann
2014-11-11 12:47 ` Linus Walleij
2014-11-12 18:46 ` Sören Brinkmann
2014-11-12 19:38 ` Sören Brinkmann
2014-11-03 19:05 ` [PATCH 3/7] pinctrl: pinconf-generic: Allow driver to specify DT params Soren Brinkmann
2014-11-03 19:12 ` Geert Uytterhoeven
2014-11-11 14:53 ` Linus Walleij
2014-11-18 8:50 ` Ivan T. Ivanov
2014-11-18 17:25 ` Sören Brinkmann
2014-11-19 7:49 ` Ivan T. Ivanov
2014-11-19 15:35 ` Sören Brinkmann
2014-11-20 8:06 ` Ivan T. Ivanov
2014-11-20 16:22 ` Sören Brinkmann
2014-11-21 7:35 ` Ivan T. Ivanov
2014-11-22 16:06 ` Sören Brinkmann
2014-11-24 8:52 ` Ivan T. Ivanov
2014-11-27 17:53 ` Sören Brinkmann
2014-11-03 19:05 ` [PATCH 4/7] pinctrl: zynq: Document DT binding Soren Brinkmann
2014-11-05 3:35 ` Andreas Färber
2014-11-05 17:07 ` Sören Brinkmann
2014-11-11 15:00 ` Linus Walleij
2014-11-12 18:53 ` Sören Brinkmann
2014-11-27 13:10 ` Linus Walleij
2014-11-03 19:05 ` [PATCH 5/7] pinctrl: Add driver for Zynq Soren Brinkmann
2014-11-05 3:24 ` Andreas Färber
2014-11-05 17:10 ` Sören Brinkmann
2014-11-05 5:12 ` Andreas Färber
2014-11-05 17:14 ` Sören Brinkmann
2014-11-03 19:05 ` [PATCH 6/7] ARM: zynq: Enable pinctrl Soren Brinkmann
2014-11-03 19:05 ` [PATCH 7/7] ARM: zynq: DT: Add pinctrl information Soren Brinkmann
2014-11-05 5:56 ` [PATCH 0/7] Pinctrl support for Zynq Andreas Färber
2014-11-05 17:03 ` Sören Brinkmann
2014-11-06 3:51 ` Andreas Färber
2014-11-06 4:13 ` Sören Brinkmann
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