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From: Zbigniew Bodek <zbodek@gmail.com>
Date: Fri, 28 Aug 2015 10:35:23 +0200
Message-ID: <CALF_TxkHNkVnyed1=ax1wodWSqNoH03OQxqafuD2mwKO1AW-CA@mail.gmail.com>
Subject: Re: GIC - interrupts interpretation in DTS/FDT
To: Mihai Carabas <mihai.carabas@gmail.com>
Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
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Hello Mihai,

This documents may be helpful:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/arm/gic.txt

The meaning of each interrupt cell (for ARM GIC) is described there.

Best regards
zbb

2015-08-28 9:15 GMT+02:00 Mihai Carabas <mihai.carabas@gmail.com>:
> Hi everyone,
>
> In the sys/arm/arm/gic.c there is a comment: "The hardware only supports
> active-high-level or rising-edge". From where is this deducted?
>
> I'm looking in the TRM for Cortex-A15 and there are some interrupts
> active-low-level. E.g.: "Virtual Timer event (PPI4) This is the event
> generated from the virtual timer and uses ID27. The interrupt is active-LOW
> level-sensitive."
>
> Thanks,
> Mihai
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