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Date: Thu, 7 Oct 2010 21:52:02 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Mike Frysinger <vapier@gentoo.org>
Cc: Daniel Walker <dwalker@codeaurora.org>, linux-kernel@vger.kernel.org,
        "Hyok S. Choi" <hyok.choi@samsung.com>,
        Tony Lindgren <tony@atomide.com>, Jeff Ohlstein <johlstei@quicinc.com>,
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        Alan Cox <alan@linux.intel.com>, Kukjin Kim <kgene.kim@samsung.com>,
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        Jason Wessel <jason.wessel@windriver.com>,
        Philippe Langlais <philippe.langlais@stericsson.com>
Subject: Re: [PATCH] serial: DCC(JTAG) serial and console emulation support
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On Thu, 7 Oct 2010 15:25:34 -0400
Mike Frysinger <vapier@gentoo.org> wrote:

> On Thu, Oct 7, 2010 at 14:36, Daniel Walker wrote:
> > Many of JTAG debuggers for ARM support DCC protocol over JTAG
> > connection, which is very useful to debug hardwares which has no
> > serial port. This patch adds DCC serial emulation and the console
> > support. System timer based polling method is used for the
> > emulation of serial input interrupt handling.
> 
> why use serial_core at all ?  seems like you could just use the tty
> layer directly.  i did that with drivers/char/bfin_jtag_comm.c.

I would agree 100% with this for the driver in question. The tty_port
helpers now make it trivial to do so and it'll be small and clean as a
result.

Alan