Rob Herring wrote:
On 12/09/2011 05:45 AM, Michal Simek wrote:
If you setup IRQ_OFFSET > nr_irq you completely separate hardware
and software IRQs which help you with debugging.
For example:
IRQ_SW_OFFSET = 32
DTS HW(line) LINUX
timer - 2 3 35
sysace 4 5 37
serial 5 6 38
HW line is setup DTS + NO_IRQ_OFFSET to ensure that NO_IRQ is always 0.
This is really confusing. DTS is the HW numbering. The last 2 columns
are both Linux IRQ numbering. Just create a single define for an offset.
Then I would combine this into the previous patch.
DTS generator, which we used for DTS generator for more than 2 years,
generates for the first IRQ in the system this property "interrupts = < 0 2 >;"
Which is HW line 1 and linux irq_data->hwirq 0 (because of shift) and
irq_data->irq = 1
for SW_OFFSET=0.
Anyway no problem to keep just NO_IRQ_OFFSET value.
Thanks,
Michal
--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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