Re: [PATCH 2/6] ARM: ep93xx: enable SPARSE_IRQ

[Alexander Sverdlin]

Hi!

On Sat, 19 Oct 2019 22:08:40 +0200
Arnd Bergmann <arnd@xxxxxxxx> wrote:

> > # cat /proc/interrupts
> >            CPU0
> >  39:        146       VIC   7 Edge      eth0
> >  51:     162161       VIC  19 Edge      ep93xx timer
> >  52:        139       VIC  20 Edge      uart-pl010
> >  53:          4       VIC  21 Edge      ep93xx-spi
> >  60:          0       VIC  28 Edge      ep93xx-i2s
> > Err:          0
> 
> I guess that is partial success: some irqs do work ;-)

Yep, VIC1 is working, while VIC0 is not.

> The two interrupts that did not get registered are for the
> dmaengine driver, and that makes sense given the error
> message about the DMA not working. No idea how
> that would be a result of the irq changes though.

Seems, that it has exposed some incompatibilities of
starting IRQ 0 in EP93xx platform fir VIC0 and VIC code
itself, which assumes 0 means "auto assignment" (refer
to vic_init()).

But there are more problems I didn't resolve yet.

-- 
Alexander Sverdlin.