From: Scott Wood <scottwood@freescale.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org,
Yoder Stuart-B08248 <stuart.yoder@freescale.com>
Subject: Re: [RFC][PATCH 6/8] Walnut DTS
Date: Mon, 16 Jul 2007 17:18:52 -0500 [thread overview]
Message-ID: <469BEECC.6070404@freescale.com> (raw)
In-Reply-To: <1184623898.25235.96.camel@localhost.localdomain>
Benjamin Herrenschmidt wrote:
> No, interrupt maps are useful in devices with no children in some corner
> cases. Remember that a map doesnt need to use the address part of the
> source specifier, thus it can be used to do a pure domain->domain
> conversion of the irq numbers, what sort of thing. The map has the added
> advantage that today, it's the only mechanism that allows you to specify
> different interrupt-parents through the same nexus, which is useful for
> 4xx.
OK... but if you're doing a pure IRQ number conversion, the only useful
#address-cells would be zero, which makes it a reasonable default IMHO
(unlike the arbitrary 2 for regular traversal).
-Scott
next prev parent reply other threads:[~2007-07-16 22:19 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-11 13:52 [RFC][PATCH 0/8] arch/powerpc support for Walnut Board Josh Boyer
2007-07-11 13:53 ` [RFC][PATCH 1/8] 4xx Kconfig cleanup Josh Boyer
2007-07-11 13:55 ` [RFC][PATCH 2/8] 4xx boot wrapper reworks Josh Boyer
2007-07-11 13:56 ` [RFC][PATCH 3/8] 4xx MMU Josh Boyer
2007-07-11 20:56 ` Arnd Bergmann
2007-07-11 21:15 ` Josh Boyer
2007-07-12 7:09 ` Kumar Gala
2007-07-12 12:40 ` Josh Boyer
2007-07-11 13:57 ` [RFC][PATCH 4/8] 4xx decrementer fixes Josh Boyer
2007-07-11 13:58 ` [RFC][PATCH 5/8] Fix 4xx build Josh Boyer
2007-07-11 21:00 ` Arnd Bergmann
2007-07-11 13:59 ` [RFC][PATCH 6/8] Walnut DTS Josh Boyer
2007-07-11 14:26 ` Stefan Roese
2007-07-11 14:37 ` Josh Boyer
2007-07-11 17:49 ` Segher Boessenkool
2007-07-11 17:55 ` Josh Boyer
2007-07-11 18:07 ` Segher Boessenkool
2007-07-18 1:02 ` David Gibson
2007-07-12 15:13 ` Yoder Stuart-B08248
2007-07-16 14:34 ` Segher Boessenkool
2007-07-16 21:47 ` Benjamin Herrenschmidt
2007-07-16 21:55 ` Scott Wood
2007-07-16 22:11 ` Benjamin Herrenschmidt
2007-07-16 22:18 ` Scott Wood [this message]
2007-07-16 22:34 ` Benjamin Herrenschmidt
2007-07-16 21:55 ` Yoder Stuart-B08248
2007-07-16 22:12 ` Benjamin Herrenschmidt
2007-07-17 2:39 ` Josh Boyer
2007-07-17 14:26 ` Segher Boessenkool
2007-07-17 14:15 ` Segher Boessenkool
2007-07-17 21:25 ` Benjamin Herrenschmidt
2007-07-17 22:25 ` Scott Wood
2007-07-17 22:58 ` Benjamin Herrenschmidt
2007-07-18 13:53 ` Segher Boessenkool
2007-07-18 16:47 ` Scott Wood
2007-07-19 16:54 ` Segher Boessenkool
2007-07-18 13:48 ` Segher Boessenkool
2007-07-11 14:02 ` [RFC][PATCH 7/8] Walnut defconfig Josh Boyer
2007-07-11 14:03 ` [RFC][PATCH 8/8] Walnut board support Josh Boyer
2007-07-11 14:04 ` [RFC][PATCH 9/8] Walnut zImage wrapper Josh Boyer
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