linux-kernel - Re: [PATCH v2] Input: Add generic driver for Zeitec touchscreens

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Message-ID: <CAEm+DGXAM_Rq7wSk3hEFivxAcv6efDv248VkrnOWhy8qnqhnwA@mail.gmail.com>
Date:	Thu, 18 Jun 2015 11:39:16 +0300
From:	Bogdan George Stefan <bogdan.george.stefan@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Bogdan George Stefan <bogdan.g.stefan@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Purdila Octavian <octavian.purdila@...el.com>
Subject: Re: [PATCH v2] Input: Add generic driver for Zeitec touchscreens

Dimitry,

You can control how many fingers work on a device via the firmware
that you load. I've asked the Zeitec guys to confirm. So, to answer
your question, if you want to build a system with a touch that
supports only 7 fingers, you can pick any part from Zeitec and give
the supplier the right firmware.

Thank you,
Bogdan Stefan

On Fri, Jun 12, 2015 at 3:45 AM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
>
> Hi Bogdan,
>
> On Tue, Jun 02, 2015 at 10:43:01AM +0300, Bogdan George Stefan wrote:
> > Dimitry,
> >
> > I know 0xB2 should provide that information according to the
> > datasheet, however here is what Zeitec guys had to say when I asked
> > them why it does not work:
> >
> > "0xB2 is deprecated.
> > It only supports in Zet6221/31 serious but zet9172/zet6273."
> >
> > If you like, I can attach my conversation with them.
> >
>
> Not really, but I would like to understand how the part selection works.
> Are they the same parts or different parts? Let's say you want to build
> a system and you want part that reports up to 7 contacts. How do you
> communicate this to the supplier? The number of contacts - is it
> controller by the config file you load into the controller, or they have
> separate parts for different contact count or what?
>
> Thanks.
>
> --
> Dmitry
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