linux-kernel - Re: [PATCH 1/8] ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.

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Date:   Wed, 7 Sep 2016 20:09:20 +0200 (CEST)
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Gerd Hoffmann <kraxel@...hat.com>,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Cc:     Scott Branden <sbranden@...adcom.com>, Ray Jui <rjui@...adcom.com>,
        Russell King <linux@...linux.org.uk>, eric@...olt.net,
        open list <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com, swarren@...dotorg.org,
        Mark Rutland <mark.rutland@....com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH 1/8] ARM: dts: bcm283x: Define standard pinctrl groups
 in the gpio node.

Hi Gerd,

> Gerd Hoffmann <kraxel@...hat.com> hat am 7. September 2016 um 12:31
> geschrieben:
> 
> 
> From: Eric Anholt <eric@...olt.net>
> 
> The BCM2835-ARM-Peripherals.pdf documentation specifies what the
> function selects do for the pins, and there are a bunch of obvious
> groupings to be made.  With these created, we'll be able to replace
> bcm2835-rpi.dtsi's main "set all of these pins to alt0" with
> references to specific groups we want enabled.

on IMX/MXS platform it's unwanted to add all possible muxes in the dtsi file. So
i would suggest to add only the actually used muxes. That makes it easier to
maintain.

Regards
Stefan