Re: Wrong IRQ assigned on MPC8349EMDS board

On Thu, Feb 28, 2008 at 09:38:36PM +0530, biswa.nayak@wipro.com wrote:

I found that the IRQ lines assigned to different peripherals are
completely wrong.
My serial ports are connected to pin 9 and 10, but in this kernel the
IRQs assigned are 16 and 17. 

These are virtual IRQ numbers, which have nothing to do with the IPIC IRQ
numbers.

On a little investigation I found that the base address assigned to the
IPIC chip is '0xFDDFB700'

That's a virtual address returned from ioremap(), not the physical
address of the IPIC.

Does this wrong assignment is due to the wrong base address of the IPIC
chip?
With IRQs 16 and 17, how the serial console is working fine?

When I tried hard coding the IPIC base value to '0xfe000700' then the
system refuses to boot up.

That might be a hint that things aren't as wrong as you think. :-)

I kept the IPIC base as 0xfddfb700 and hard coded the irq lines for
serial ports as 9 and 10
and in that case the 'request_irq' call fails with the error number as
'-38',
which translates to '-ENOSYS'. 

Likewise.

-Scott