From: Scott Wood <scottwood@freescale.com>
To: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: P2010 External HW IRQ number?
Date: Fri, 8 Jun 2012 14:23:50 -0500 [thread overview]
Message-ID: <4FD25146.5090108@freescale.com> (raw)
In-Reply-To: <OF71CEA252.1CE143D5-ONC1257A17.00329573-C1257A17.003D00D0@transmode.se>
On 06/08/2012 06:06 AM, Joakim Tjernlund wrote:
>
> I have been trying to figure out what irq number to use for external IRQs for
> the P2010. There are no HW IRQ numbers in the ref manual and I cannot find
> any examples in the kernel either.
> How do specify irq numbers in my dts for external IRQs?
See Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
For external interrupts, the first cell is equal to the IRQ number.
For an example of specifying an external IRQ, see the RTC and PHY nodes
in various mpc85xx device trees (e.g. mpc8536ds.dtsi).
> What do I use with request_irq(?,....)?
You need a virtual IRQ number. Typically this comes from
irq_of_parse_and_map().
-Scott
next prev parent reply other threads:[~2012-06-08 19:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 11:06 P2010 External HW IRQ number? Joakim Tjernlund
2012-06-08 19:23 ` Scott Wood [this message]
2012-06-09 9:00 ` Joakim Tjernlund
2012-06-11 15:12 ` Scott Wood
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