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Date: Fri, 6 Dec 2013 11:38:51 +1100
From: James Cameron <quozl@laptop.org>
To: Sergei Ianovich <ynvich@gmail.com>
Cc: linux-kernel@vger.kernel.org,
        "open list:OPEN FIRMWARE AND..." <devicetree@vger.kernel.org>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Russell King <linux@arm.linux.org.uk>,
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        Haojian Zhuang <haojian.zhuang@gmail.com>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
        Grant Likely <grant.likely@linaro.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        John Crispin <blogic@openwrt.org>, Jiri Slaby <jslaby@suse.cz>,
        "moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
        Zhou Zhu <zzhu3@marvell.com>
Subject: Re: [PATCH] serial: rewrite pxa2xx-uart to use 8250_core
Message-ID: <20131206003851.GI16425@us.netrek.org>
References: <20131205043544.GA28580@kroah.com>
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On Fri, Dec 06, 2013 at 03:28:37AM +0400, Sergei Ianovich wrote:
> pxa2xx-uart was a separate uart platform driver. It was declaring
> the same device names and numbers as 8250 driver. As a result,
> it was impossible to use 8250 driver on PXA SoCs.
> 
> Upon closer examination pxa2xx-uart turned out to be a clone of
> 8250_core driver.

I'm testing this backported to 3.5 on the OLPC XO-4 [1] [2].

As Russell says, the getty had to change, but after that the shell
worked fine; no more or no less responsive.

What hasn't worked yet is the console; no kernel messages appear.  I
have tried changing command line to console=ttyS0,115200.

1.  http://dev.laptop.org/~quozl/y/1VojGn.txt (diff relative to
olpc-kernel/arm-3.5)

2.  http://dev.laptop.org/~quozl/z/1VojLz.txt (dmesg)

-- 
James Cameron
http://quozl.linux.org.au/