From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id EFD56B70B8 for ; Tue, 12 Oct 2010 14:09:59 +1100 (EST) Message-ID: <4CB3D1FF.6070102@windriver.com> Date: Tue, 12 Oct 2010 11:11:59 +0800 From: "tiejun.chen" MIME-Version: 1.0 To: Scott Wood Subject: Re: Questions on interrupt vector assignment on MPC8641D References: <6e7b840fa55e4fba421e1b1cea2716ec.squirrel@localhost> <1682399277683944B902B3657D2FCE21654570D791@CAREXCLUSTER03.ATL.CW.LOCAL> <20100921170700.53a99e56@udp111988uds.am.freescale.net> <20101007152626.4e834d43@udp111988uds.am.freescale.net> <20101011105031.52a5c06a@udp111988uds.am.freescale.net> <9af5fd3c8f713d261c7acdc1d195fb84.squirrel@localhost> <20101011123006.5b489d19@udp111988uds.am.freescale.net> In-Reply-To: <20101011123006.5b489d19@udp111988uds.am.freescale.net> Content-Type: text/plain; charset=UTF-8 Cc: david.hagood@gmail.com, "linuxppc-dev@lists.ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Scott Wood wrote: > On Mon, 11 Oct 2010 12:02:15 -0500 > wrote: > >> Re-ordering your questions a bit: >> >>> What board are you using? What kernel? >> One of 2 boards: Either an Embedded Planet or a Performance Tech uTCA >> board based on the MPC8641D, running the 2.6.26 as supplied by EP. > > That's a very old kernel. Have you contacted EP support? > > You may be better off trying to migrate anything board-specific to the > latest kernel, rather than do new development on the vendor kernel, > especially if you're looking for community support, and definitely if > you're trying to do something that could be merged upstream to help > others. > > The MPC8641D itself is supported in mainline Linux. > >>> On Sat, 9 Oct 2010 10:52:49 -0500 >>> Documentation/powerpc/dts-bindings/fsl/mpic.txt >> Not present in the version I have. > > We didn't have a time machine, so we were only able to add things to new > releases, not old ones. :-) > > Should it have been documented from the start? Ideally, yes, and we're > pickier now than we were then about insisting on bindings being > documented before they're used. But nothing's perfect. On the *latest* tree you can find more than your tree: ------ Documentation/powerpc/dts-bindings/fsl/msi-pic.txt Documentation/powerpc/booting-without-of.txt If you want to understand dts in detail you can refer to the file, ------ http://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.0.pdf > >>> If it's not in the dts, add it. If for whatever reason that's not an >>> option, you can use irq_create_mapping() as I mentioned in the previous >>> e-mail. >> And as I've said previously, I have no good info on HOW to add the nodes, >> WHAT to add, or WHERE. You may as well be saying "Bargle the Narbog". > > There are no nodes to add with irq_create_mapping(). Sure. > > Just bargle the narbog. > >> And when I try to use irq_create_mapping() it seg faults, which doesn't >> exactly help me get my interrupt hooked up. > > Well, I didn't know it was going to do that... Your usage of > irq_create_mapping() seems fine, there's just something going wrong. The 'NULL' host would be 'irq_default_host'. For OOPS you can check my another email and hope its useful. -Tiejun > See my other reply about the number of MPIC interrupts.