linux-kernel - Re: [PATCH v8 3/3] tty: 8250_omap: Use software emulated RS485 direction control

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Message-ID: <CAEo2pzu60tmME7N07X+OyGHpDnxT9VnzNDO2SZ9qRGu5zKpWuA@mail.gmail.com>
Date:	Thu, 18 Feb 2016 10:18:38 +0300
From:	Ильяс Гасанов 
	<torso.nafi@...il.com>
To:	"Matwey V. Kornilov" <matwey@....msu.ru>
Cc:	Greg KH <gregkh@...uxfoundation.org>, Jiri Slaby <jslaby@...e.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH v8 3/3] tty: 8250_omap: Use software emulated RS485
 direction control

Also, forgot to mention that if serial8250_em485_init is called not
upon uart startup but elsewhere (upon port register for example), and
em485 is set, serial8250_do_startup should call
serial8250_em485_rts_after_send, or else RTS might be in wrong state
whenever the port device is opened, making it impossible to receive
data through RTS-controlled RS232<->RS485 hardware converters.

Regards,
Ilyas G.