linux-kernel - Re: [PATCH 2/2] Input: atmel_mxt_ts

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Date:	Fri, 15 Aug 2014 14:01:56 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Nick Dyer <nick.dyer@...ev.co.uk>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Stephen Warren <swarren@...dia.com>,
	Yufeng Shen <miletus@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>, linux-input@...r.kernel.org,
	devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Input: atmel_mxt_ts - Add keycodes array example

Hello Nick,

On 08/08/2014 04:52 PM, Javier Martinez Canillas wrote:
On 08/07/2014 02:38 PM, Nick Dyer wrote:
>> >>
>> 
>> I'm afraid you have misunderstood the impact of this change to the way that
>> the GPIOs coming in to the touch controller are mapped to key codes. Look
> 
> Unfortunately there are no boards in mainline using this "linux,gpio-keymap"
> property so I tried to figure out what the expected values were by reading the
> driver. So is more than possible that I got them wrong.
> 
> By passing all these keycodes the touchpad worked as expected for me and the
> driver did the same than the Chrome OS driver that has these keycodes hardcoded
> when is_tp is true.
> 
>> at the protocol guide for T19.
>> 
> 
> I don't have access to proper documentation and I wouldn't expect people to have
> access to non-public docs in order to use a Device Tree binding.
> 
> That's why I wanted to document an example, so using this property could be
> easier for others and they shouldn't have to look at the driver in order to
> figure it out (and getting it wrong as you said :) )
> 
> So it would be great if you could provide an example on how this is supposed to
> be used.
> 

Any comments on this? I would really appreciate if you can expand on how
this DT property is supposed to be used so I can re-spin the atmel support
patch for Peach boards.

Thanks a lot and best regards,
Javier
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