From: Paul Mundt <lethal@linux-sh.org>
To: linux-sh@vger.kernel.org
Subject: Re: SH7722 serial scif
Date: Wed, 24 Sep 2008 15:49:01 +0000 [thread overview]
Message-ID: <20080924154901.GA8234@linux-sh.org> (raw)
In-Reply-To: <878566.91579.qm@web26201.mail.ukl.yahoo.com>
On Wed, Sep 24, 2008 at 02:52:05PM +0000, Michael Trimarchi wrote:
> I find a problem releated to the scif serial device. Using scif2 on the
> MigoR, the kernel block on the second open of the device when it try to
> register irq line. So in the shutdown sequence I add:
>
> sci_out(port, SCSCR, 0x00);
>
> and in the startup squence:
>
> sci_out(port, SCSCR, SCSCR_INIT(port));
>
> The version is 2.6.24.2 but I think is present in the latest release too.
>
> My idea is to post a patch to register and enable and disable for the
> scif port on the SH7722. Can be a problem for other micro?
>
I'm not entirely sure I follow what the problem is, so yes, a patch would
help. It sounds like you are running in to a problems trying to do multiple
opens on the same port where request_irq() returns -EBUSY or some such
thing? I don't immediately see how that would be happening, so perhaps
I'm misunderstanding your problem.
next prev parent reply other threads:[~2008-09-24 15:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-24 14:52 SH7722 serial scif Michael Trimarchi
2008-09-24 15:49 ` Paul Mundt [this message]
2008-09-24 15:57 ` Michael Trimarchi
2008-09-24 16:43 ` Paul Mundt
2008-09-25 9:17 ` Michael Trimarchi
2008-09-27 17:12 ` Magnus Damm
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