Re: [PATCH] pata_of_platform: fix no irq handling

[Anton Vorontsov <avorontsov@ru.mvista.com>]

On Tue, Aug 12, 2008 at 10:00:40AM -0400, Steven A. Falco wrote:
> Benjamin Herrenschmidt wrote:
> >   
> >> 1. IDE status read does not work. (But am I understand correctly
> >>    that IDE works well if IRQ is unspecified? Then this is hardly
> >>    an issue.)
> >> 2. IDE interrupt comes when it should not. I'd recommend to use
> >>    oscilloscope to find out what is happening there, that is, if
> >>    the drive actually deasserts its irq line after status read.
> >>    If so, than this could be a PIC problem.
> >>
> >> What is the platform on which you're observing the issue, btw?
> >>     
> >
> > Another possibility is that you got the wrong interrupt number
> > in the device-tree...
> >
> > Ben.
> >   
> 
> The platform is the AMCC Sequoia board.  We've built a little adapter to
> connect a compact flash card to the processor bus.  I believe the
> interrupt selection in the device tree is correct, and I've checked over
> the u-boot settings for the IRQ line (active high, level sensitive). 

IDE IRQs are active-low.

-- 
Anton Vorontsov
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