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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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