From: Wolfgang Grandegger <wg@grandegger.com>
To: Jon Smirl <jonsmirl@gmail.com>
Cc: linuxppc-dev <Linuxppc-dev@ozlabs.org>
Subject: Re: interrupt cells on mpc5200
Date: Wed, 10 Sep 2008 18:54:37 +0200 [thread overview]
Message-ID: <48C7FBCD.10803@grandegger.com> (raw)
In-Reply-To: <9e4733910809100940g400bab3ck6f68ee24ae8d4573@mail.gmail.com>
Jon Smirl wrote:
> mpc5200 interrupts have three cells in the device tree. How are these
> interpreted?
> Middle one is the interrupt number. Last one seems to always be zero.
> What does the first one do, edge/level?
>
> I searched through /Documentation and could find anything about three
> cells for interrupts.
>
> I understand the first one for gpio_wkup on interrupt 8. How does a
> gpio_wkup generate an interrupt on interrupt 3?
>
> gpio_wkup: gpio-wkup@c00 {
> compatible = "fsl,mpc5200b-gpio-wkup","fsl,mpc5200-gpio-wkup";
> reg = <0xc00 0x40>;
> interrupts = <0x1 0x8 0x0 0x0 0x3 0x0>;
> interrupt-parent = <&mpc5200_pic>;
> gpio-controller;
> #gpio-cells = <2>;
> };
See
http://lxr.linux.no/linux+v2.6.26.5/Documentation/powerpc/mpc52xx-device-tree-bindings.txt#L263
Wolfgang.
next prev parent reply other threads:[~2008-09-10 16:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-10 16:40 interrupt cells on mpc5200 Jon Smirl
2008-09-10 16:54 ` Wolfgang Grandegger [this message]
2008-09-10 17:39 ` Jon Smirl
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