On Wed, Sep 19, 2007 at 09:01:46PM +0200, S. Fricke wrote:
> Hello,
>
> > On 9/19/07, S. Fricke <[EMAIL PROTECTED]> wrote:
> > > Hi,
> > >
> > > how can i configure an "ext interrupt" to high-level? I want a
> > > interruption on
> > > IRQ2, but I checked with an oscilloscope that the pin has a low state and
> > > I
> > > needs a high state.
> > >
> > > I have tried, after I got the irq (with irq_of_parse_and_map), set it with
> > >
> > > set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH);
> > >
> > > But I think it is a system-configuration (irq_desc) and no
> > > device-configuration.
> >
> > You shouldn't need to do this. You set your sense level in the device tree.
> >
> > From your previous email, your device node looks like this:
> > > [EMAIL PROTECTED] {
> > > interrupt-parent = <500>;
> > > interrupts = <1 2 2>;
> > > };
> >
> > Which is IRQ2, EDGE_FALLING.
> >
> > If you change your interrupts property to <1 2 0>, then your sense is
> > set to LEVEL_HIGH. (Seriously, you need to read the interrupts
> > section of Documentation/powerpc/mpc52xx-device-tree-bindings.txt.)
>
> I have read it! But another driver on Boot-time pulled my interruptErm.. if the interrupt is shared with something else which expects a different trigger/polarity, you're kind of stuffed.... > to low, I can't do anything except for looking at the oscilloscope > > I'm going to disable all unneeded drivers tomorrow morning. > > TIA: > Silvio Fricke > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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