linux-kernel - Re: [PATCH v4 1/2] serial: rewrite pxa2xx-uart to use 8250

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Date:	Sat, 19 Dec 2015 13:45:21 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	James Cameron <quozl@...top.org>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Rob Herring <robh@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Kevin Hilman <khilman@...aro.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Arnd Bergmann <arnd@...db.de>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Scott Wood <scottwood@...escale.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Paul Burton <paul.burton@...tec.com>,
	Joachim Eastwood <manabian@...il.com>,
	Mans Rullgard <mans@...sr.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Peter Hurley <peter@...leysoftware.com>,
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
	linux-serial@...r.kernel.org (open list:SERIAL DRIVERS)
Subject: Re: [PATCH v4 1/2] serial: rewrite pxa2xx-uart to use 8250_core

Sergei Ianovich <ynvich@...il.com> writes:

> 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.
>
> Signed-off-by: Sergei Ianovich <ynvich@...il.com>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Reviewed-by: James Cameron <quozl@...top.org>
> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Tested-by: Robert Jarzmik <robert.jarzmik@...e.fr>

I was wondering if this should go through pxa tree, or through serial tree ?

Cheers.

--
Robert
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