linux-kernel - Re: [PATCH v4 01/21] serial: rewrite pxa2xx-uart to use 8250

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Message-ID: <CAL_JsqJUWRhGA_8NU+O=fLFdMiVNz0LV6G0LU=ikgk=zah2q2A@mail.gmail.com>
Date:	Mon, 19 Jan 2015 12:08:21 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	James Cameron <quozl@...top.org>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Paul Bolle <pebolle@...cali.nl>, Arnd Bergmann <arnd@...db.de>,
	Randy Dunlap <rdunlap@...radead.org>,
	Stefan Seyfried <seife+kernel@...systems.com>,
	"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 01/21] serial: rewrite pxa2xx-uart to use 8250_core

On Wed, Apr 16, 2014 at 12:13 PM, Sergei Ianovich <ynvich@...il.com> 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.
>
> 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>
> ---
>  Resenging together with the rest of the series as the series
>  breaks without this one at [PATCH 12/21]

Whatever happened with merging this? I'm asking because either this or
fixes to PXA uart are needed to coexist with the 8250 driver and for
earlycon to work.

Rob
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