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Date:	Mon, 29 Feb 2016 14:45:28 +0000
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Sergei Ianovich <ynvich@...il.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Paul Burton <paul.burton@...tec.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Mans Rullgard <mans@...sr.com>,
	Scott Wood <scottwood@...escale.com>,
	Joachim Eastwood <manabian@...il.com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Peter Hurley <peter@...leysoftware.com>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@...r.kernel.org>,
	"open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH v6] serial: support for 16550A serial ports on LP-8x4x

> I haven't tested this mode. I am pretty sure it will fail. There is
> also no support for speeds higher than 115200.
> 
> CS7 and CS8 at speeds up to 115200 work well.
> 
> However, there is no way to report errors from set_termios(). Should
> anything be done about those limitations?

You report back by setting the termios fields to the values actually
selected. Eg if you can't do CS5/CS6 you'd pick CS7 or CS8 and write that
back into tty->termios so the caller knows what they actually got. Ditto
for speed (see the 16550A core driver for the speed write backs).

Alan

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