From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Sun, 18 Nov 2012 12:02:37 +0000
Subject: [PATCH v2] Misc: ARM_CHAR_LCD: Permit the use of a driver on
 any ARM machine
In-Reply-To: <1353239366.88869804@f19.mail.ru>
References: <1353236200-11435-1-git-send-email-shc_work@mail.ru>
 <20121118111016.GS3290@n2100.arm.linux.org.uk>
 <1353239366.88869804@f19.mail.ru>
Message-ID: <20121118120237.GU3290@n2100.arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Sun, Nov 18, 2012 at 03:49:26PM +0400, Alexander Shiyan wrote:
> > > arm-charlcd driver can be used on any ARM machine, so dependency of
> > > PLAT_VERSATILE is removed.
> > 
> > This needs a better explanation.  We know that it's used on ARMs
> > reference boards.  Which other platforms will be making use of this
> > driver?  Do these other boards implement the same interface, including
> > the presence of the interrupt?
> > 
> > I'd need to re-read the specs, but I think that the interface this
> > driver uses is provided by ARMs FPGA rather than the LCD module itself,
> > and re-use of this driver would need that IP to be implemented elsewhere.
> Additionally: But, you are right. This should be reviewed more accuracy for a
> support for other machines, so please drop this patch.

What would be nice to see is a driver library for these LCD modules which
can then be hooked into whatever interface a platform presents, and come
up with some kind of solution to that where the platform interface can be
represented in DT form.