On Wed, Jan 14 2015 at 10:28:14 pm GMT, Tony Lindgren <[email protected]> wrote:
> * Marc Zyngier <[email protected]> [150112 10:30]:
>> OMAP4/5 has been (ab)using the gic_arch_extn to provide
>> wakeup from suspend, and it makes a lot of sense to convert
>> this code to use stacked domains instead.
>>
>> This patch does just this, updating the DT files to actually
>> reflect what the HW provides.
>>
>> BIG FAT WARNING: because the DTs were so far lying by not
>> exposing the WUGEN HW block, kernels with this patch applied
>> won't have any suspend-resume facility when booted with old DTs,
>> and old kernels with updated DTs won't even boot.
>>
>> On a platform with this patch applied, the system looks like
>> this:
>>
>> root@bacon-fat:~# cat /proc/interrupts
>> CPU0 CPU1
>> 16: 0 0 WUGEN 37 gp_timer
>> 19: 233799 155916 GIC 27 arch_timer
>> 23: 0 0 WUGEN 9 l3-dbg-irq
>> 24: 1 0 WUGEN 10 l3-app-irq
>> 27: 282 0 WUGEN 13 omap-dma-engine
>> 44: 0 0 4ae10000.gpio 13 DMA
>
> FYI, the legacy irq numbers are now all wrong since commit
> 9a1091ef0017 ("irqchip: gic: Support hierarchy irq domain.").
>
> Started a separate thread "Regression with legacy IRQ numbers
> caused by 9a1091ef0017" on it, will give these a try once
> that's sorted out.
Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
this series is going to require some rework too (I need to know where
these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
Thanks,
M.
--
Jazz is not dead. It just smells funny.
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