linux-kernel - Re: [RESEND][PATCH] input: Added TSC2003

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Message-ID: <4A374C50.1000508@mocean-labs.com>
Date:	Tue, 16 Jun 2009 09:40:00 +0200
From:	Richard Röjfors 
	<richard.rojfors.ext@...ean-labs.com>
To:	Thierry Reding <thierry.reding@...onic-design.de>
Cc:	Trilok Soni <soni.trilok@...il.com>, linux-input@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-omap@...r.kernel.org
Subject: Re: [RESEND][PATCH] input: Added TSC2003

On 09-06-16 08.20, Thierry Reding wrote:
>>>>
>>> Meaning? I think I2C transaction can sleep.
>> Yes that's what it means, and that's bad in a HR timer callback.
> 
> Note that my patch to the tsc2007 to support the tsc2003 exactly fixes this
> problem. It moves the actual I2C transfers into a workqueue, so no sleeping
> functions are called from the hrtimer callback.

Ah good! The IRQ is disabled no sync too.
We actually don't have the possibility to implement a pen down state callback,
so I need to modify the code slightly to work even without one. (but not be
as accurate when the callback is not available)

Your patch where it schedules work rather than calling the I2C function directly
isn't in mainline.
I saw a patch where you added the work scheduling, and a later patch where you
fixed some spinlock stuff, have you resent the patch for the work scheduling?

--Richard
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