linux-kernel - Re: [RFC PATCH] tty: serial: Add 8250-core based omap driver

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Message-ID: <20140703170822.GB5814@saruman.home>
Date:	Thu, 3 Jul 2014 12:08:22 -0500
From:	Felipe Balbi <balbi@...com>
To:	Javier Martinez Canillas <javier@...hile0.org>
CC:	Sebastian Reichel <sre@...nel.org>, Felipe Balbi <balbi@...com>,
	Robert Nelson <robertcnelson@...il.com>,
	Tony Lindgren <tony@...mide.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux kernel <linux-kernel@...r.kernel.org>,
	<linux-serial@...r.kernel.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH] tty: serial: Add 8250-core based omap driver

On Thu, Jul 03, 2014 at 06:19:47PM +0200, Javier Martinez Canillas wrote:
> On Thu, Jul 3, 2014 at 6:06 PM, Sebastian Reichel <sre@...nel.org> wrote:
> > Hi,
> >
> > On Thu, Jul 03, 2014 at 10:52:40AM -0500, Felipe Balbi wrote:
> >> > DT is supposed to contain information about the hardware, so it
> >> > should stay the same? I think there is no non-hackish way to decide
> >>
> >> compatible would change, at a minimum.
> >
> > why? I would expect it to stay the same (and the current patch uses
> > the same compatible strings).
> >
> 
> Exactly, the new driver must support all the compatible strings
> defined in Documentation/devicetree/bindings/serial/omap_serial.tx
> (which already does as you pointed out).
> 
> Otherwise the current drivers/tty/serial/omap-serial.c could never be
> removed since that would mean breaking DT backward compatibility.

that settles it then... good. I'll start testing this next week.

-- 
balbi

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