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Date:	Thu, 20 Mar 2014 12:18:10 +0100
From:	Simon Budig <>
To:	Mark Rutland <>,
	Lothar Waßmann <>
CC:	Dmitry Torokhov <>,
	Fugang Duan <>,
	"" <>,
	Henrik Rydberg <>,
	Ian Campbell <>,
	Jingoo Han <>,
	Kumar Gala <>,
	Pawel Moll <>,
	Rob Herring <>,
	Rob Landley <>,
	Sachin Kamat <>,
	"" <>,
	"" <>,
	"" <>,
	"" <>
Subject: Re: [PATCHv4 2/5] Input: edt-ft5x06: Add DT support

On 20/03/14 10:37, Mark Rutland wrote:
> On Wed, Mar 19, 2014 at 01:09:20PM +0000, Lothar Waßmann wrote:
>> +FocalTech EDT-FT5x06 Polytouch driver
>> +=====================================
>> +
>> +Required properties:
>> + - compatible:  "edt,edt-ft5x06"
> Is the 'x' part of a particular product name, or is this a class of
> devices?

The driver is intended for the EDT "polytouch" family touches, which are
based on a focaltec controller. The current line of touches uses e.g.
the ft5306 as well as the ft5406 focaltec controller.

> It's preferable to have a specific string which another similar variants
> can claim compatibility with (while also additionally having a more
> specific string), as this makes it possible to handle variants more
> specially in future, target workarounds, etc.

I chose the driver name since I wanted to differentiate from other EDT
touches, which used a different controller. With hindsight it was
unfortunately confusing, since I get quite some request from people, who
also have a device based on the focaltec controllers, but with a very
different firmware (and communication protocol). They got tricked into
thinking that this driver would be suitable...

If I were to chose the name again I'd probably pick "edt-polytouch" or
something like this. But I doubt that it is useful to change the name now.


       Simon Budig                        kernel concepts GmbH      Sieghuetter Hauptweg 48
       +49-271-771091-17                  D-57072 Siegen

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