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Re: [microblaze-uclinux] xilinx_gpio driver patch

Hi Jeff,

Jeff Fellin wrote:


After some digging this morning, I know why call to request_irq() failed. My
system configuration has the second GPIO using IRQ 12, which is what was
used in the Linux-2.4 version of the system. request_irq() fails the request
if the requested IRQ is > the maximum supported IRQ, defined in
include/asm-microblaze/irq.h has 11. So 12 is greater than 11 and fails. I
checked the code in the linux-2.4.x tree and the maximum irq value for a
microblaze system is 32. Hence why it worked in 2.4 and not in 2.6. The
question is should asm-microblaze/irq.h have NR_IRQ's changed to 32?
NUM_IRQS is defined as CONFIG_XILINX_INTC0_0_NUM_INTR_INPUTS, which is derived automatically via Kconfig.auto 

For example, if NUM_INTR_INPUTS is 5, the max IRQ registered should be 4.

Can you cross check these values in your config?

John
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