linux-kernel - Re: eGalax touchscreen regression

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Date:	Fri, 26 Apr 2013 19:03:30 +0300
From:	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Hui Wang <jason77.wang@...il.com>,
	Zhang Jiejing <jiejing.zhang@...escale.com>,
	linux-input@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Hofemeier, Ulf" <ulf.hofemeier@...el.com>
Subject: Re: eGalax touchscreen regression

On Fri, 2013-04-26 at 08:39 -0700, Dmitry Torokhov wrote:
> On Fri, Apr 26, 2013 at 06:09:05PM +0300, Artem Bityutskiy wrote:
> > On Fri, 2013-04-26 at 16:59 +0200, Arnd Bergmann wrote:
> > > On Wednesday 24 April 2013 12:03:13 Artem Bityutskiy wrote:
> > > > On Tue, 2013-04-23 at 08:40 -0700, Dmitry Torokhov wrote:
> > > > > > the eGalax driver now requires OF. For us this is a regression because
> > > > > > we do not have OF: https://bugs.tizen.org/jira/browse/TIVI-740
> > > > > 
> > > > > I see. In this case we need to come up with a platform data to pass
> > > > > wakeup gpio in case platform does not support OF. irq_to_gpio() is not
> > > > > supported on many platforms, causing compilation errors.
> > > > > 
> > > > > Is the platform that you are trying to use the touchscreen upstream?
> > > > 
> > > > OK, so this is about just a monitor with a touchscreen (Giantec high-res
> > > > capacitive 11.6” LCD monitor). The touchscreen is connected to a
> > > > commodity hardware via USB.
> > > > 
> > > > So yes, the platform _is_ upstream  Namely, we use just a SandyBridge
> > > > PC.
> > > 
> > > So you use a usb-to-i2c interface?
> > 
> > I do not think so. The problem is that I do not have the HW, so I was
> > making guesses, and it looks like this driver has nothing to do with the
> > regression we've got. Sorry for the noise. We'll investigate this more
> > carefully internally.
> 
> OK, so assuming you simply using USB version of eGalax device the only
> recent change (3.6-rc7) was:
> 
> commit 037a833ed05a86d01ea27a2c32043b86c549be1b
> Author: Forest Bond <forest.bond@...idrollout.com>
> Date:   Tue Sep 4 20:27:37 2012 -0700

Thanks for the input Dmitry, appreciated. We'll be looking more
carefully at this next week.

-- 
Best Regards,
Artem Bityutskiy

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