linux-kernel - Re: [PATCH 4/5 v2] input: tc3589x-keypad: support probing from device tree

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Message-ID: <CACRpkdaAaLjm_b+OLj3tobxBN8YGUcTPnXJ=qtBqd02=FTxhjQ@mail.gmail.com>
Date:	Tue, 12 Nov 2013 21:11:40 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 4/5 v2] input: tc3589x-keypad: support probing from device tree

On Tue, Nov 12, 2013 at 9:05 PM, Sebastian Reichel <sre@...g0.de> wrote:
> On Tue, Nov 12, 2013 at 06:06:49PM +0100, Linus Walleij wrote:

>> So this binding is documented for GPIO keys in:
>> Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt
>>
>> This is probably the most used binding as GPIO matrixes are
>> not uncommon. But I don't know, yes it is a mess. (As usual.)
>
> I could find two boards using "gpio-matrix-keypad" in the mainline
> kernel and not a single instance of "linux,no-autorepeat":

In things connected to GPIO, I don't expect the in-kernel
device trees to be a good way so survey the usage of these
bindings. Anyone doing device trees on any system with a
few GPIOs can be using this.

But maybe we're lucky and won't break anyone's setup if
we change this?

Yours,
Linus Walleij
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