Re: SH7722 serial scif

[Paul Mundt <lethal@linux-sh.org>]

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.