linux-kernel - Re: [PATCH v2] serial: rewrite pxa2xx-uart to use 8250

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Message-ID: <20131206092822.GP16425@us.netrek.org>
Date:	Fri, 6 Dec 2013 20:28:22 +1100
From:	James Cameron <quozl@...top.org>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Russell King <linux@....linux.org.uk>,
	Jiri Slaby <jslaby@...e.cz>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Zhou Zhu <zzhu3@...vell.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Stefan Seyfried <seife+kernel@...systems.com>,
	John Crispin <blogic@...nwrt.org>,
	Paul Bolle <pebolle@...cali.nl>,
	"moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
	"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2] serial: rewrite pxa2xx-uart to use 8250_core

On Fri, Dec 06, 2013 at 01:09:31PM +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.
> 
> Workaround for Erratum #19 according to Marvel(R) PXA270M Processor
> Specification Update (April 19, 2010) is dropped. 8250_core reads
> from FIFO immediately after checking DR bit in LSR.

Reviewed-by: James Cameron <quozl@...top.org>

Thanks.

(for my notes ... V1 has passed 4.5 hours in OLPC's RUNIN test.)

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