linux-kernel - RE: Serial custom speed deprecated?

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Message-ID: <043201c6c857$5ddd6c20$294b82ce@stuartm>
Date:	Fri, 25 Aug 2006 11:01:38 -0400
From:	"Stuart MacDonald" <stuartm@...necttech.com>
To:	"'Alan Cox'" <alan@...rguk.ukuu.org.uk>,
	"'Krzysztof Halasa'" <khc@...waw.pl>
Cc:	"'David Woodhouse'" <dwmw2@...radead.org>,
	<linux-serial@...r.kernel.org>,
	"'LKML'" <linux-kernel@...r.kernel.org>
Subject: RE: Serial custom speed deprecated?

From: On Behalf Of Alan Cox
> At this point I think we need
> 
> -	An ioctl to set/get the actual baud rate input/output
> -	Some kind of termios flag to indicate they are being 
> used (as we have
> CBAUDEX now). [We could "borrow" the 4Mbit one and dual use it IMHO]
> 
> For drivers tty_get_baud_rate would return the actual speed as before.
> 
> We would need a driver ->set_speed method for the cases where
> - ioctl is called to set specific board rate
> - OR termios values for tty speed change
> - While we are at it we might want to make ->set_termios also 
> allowed to fail
> 
> [and if you had no ->set_speed method non standard speeds would be
> refused by the tty layer for back compat]
> 
> Anyone got any problems with this before I go and implement it ?

Sounds good.

..Stu

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