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Date: Fri, 7 Aug 2015 12:41:51 +1200
Message-ID: <CAE21AQoATGZQHUUd3=+A1GZ2wt2vgJSmAUO=MQcnUP5cGK9g6g@mail.gmail.com>
Subject: Re: [PATCH 3/3] serial: 8250: omap: restore registers on shutdown
From: Charles Manning <cdhmanning@gmail.com>
To: Peter Hurley <peter@hurleysoftware.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        John Ogness <john.ogness@linutronix.de>, linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Tony Lindgren <tony@atomide.com>, linux-omap@vger.kernel.org,
        nsekhar@ti.com, nm@ti.com, linux-serial@vger.kernel.org,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>
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On Fri, Aug 7, 2015 at 6:22 AM, Peter Hurley <peter@hurleysoftware.com> wrote:
> I agree; this is what we should do first because someone might want it
> for backports.

Got an idea how far this can be ported back?

I'm being hampered by severe performance issues on a
beagleboneblack-like device (am335x) running on 3.18 kernel.

I have a 1Mbaud link that is getting packets of about 22 bytes @800 Hz
and old omap-serial is keeping up, but killing the CPU.

I'm considering backporting 8250_omap as a get out of jail.

Opinions appreciated.

Thanks.
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