linux-kernel - Re: [PATCH RESEND] Documentation: devicetree: Clean up gpio-keys example

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Message-ID: <56DEA4D6.10008@suse.de>
Date:	Tue, 8 Mar 2016 11:09:26 +0100
From:	Andreas Färber <afaerber@...e.de>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	linux-rockchip <linux-rockchip@...ts.infradead.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	Heiko Stübner <heiko@...ech.de>,
	Julien Chauveau <chauveau.julien@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	devicetree <devicetree@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RESEND] Documentation: devicetree: Clean up gpio-keys
 example

Am 08.03.2016 um 09:54 schrieb Geert Uytterhoeven:
> On Mon, Mar 7, 2016 at 7:24 PM, Andreas Färber <afaerber@...e.de> wrote:
>> Drop #address-cells and #size-cells, which are not required by the
>> gpio-keys binding documentation, as button sub-nodes are not devices.
>>
>> Reported-by: Julien Chauveau <chauveau.julien@...il.com>
>> Signed-off-by: Andreas Färber <afaerber@...e.de>
>> ---
>>  Documentation/devicetree/bindings/input/gpio-keys.txt | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/input/gpio-keys.txt b/Documentation/devicetree/bindings/input/gpio-keys.txt
>> index 21641236c095..1552a11f6786 100644
>> --- a/Documentation/devicetree/bindings/input/gpio-keys.txt
>> +++ b/Documentation/devicetree/bindings/input/gpio-keys.txt
>> @@ -34,8 +34,6 @@ Example nodes:
>>
>>         gpio_keys {

While at it, I was told the preferred node naming would be dashes, not
underscores. The deeper we dig, the more we find.

>>                         compatible = "gpio-keys";
>> -                       #address-cells = <1>;
>> -                       #size-cells = <0>;
>>                         autorepeat;

Also a white line here may be optically more pleasant.

>>                         button@21 {
> 
> FYI, with "[PATCH] scripts/dtc: Update to upstream version 53bf130b1cdd":
> (http://www.spinics.net/lists/devicetree/msg117206.html) applied:
> 
> Warning (unit_address_vs_reg): Node /keyboard/button@21 has a unit
> name, but no reg property

My v2 GeekBox patch did have *-cells and a reg property, but Julien
asked I drop that: https://patchwork.kernel.org/patch/8246481/

Are you suggesting we should add a reg property here and drop this patch
or go with this patch but follow up to not use @21?

> 
>>                                 label = "GPIO Key UP";

Regards,
Andreas

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