From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>
Cc: Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers
Date: Thu, 5 Jul 2012 15:47:37 +0000 [thread overview]
Message-ID: <201207051547.37906.arnd@arndb.de> (raw)
In-Reply-To: <20120705135449.GZ17534-g2DYL2Zd6BY@public.gmane.org>
On Thursday 05 July 2012, Andrew Lunn wrote:
> > > Orion use generic chip interrupts, both for the main interrupts and
> > > the GPIO interrupts. This does not yet support irq domain, so i have
> > > to layer a legacy domain on top. The legacy domain needs to know the
> > > first IRQ and the number of IRQs. For the primary IRQs that is
> > > easy. However, GPIO IRQ is not so easy, it depends on how many primary
> > > IRQs there are. This is not fixed. Orion5x has 32, Dove 64, kirkwood,
> > > 64, and mv78xx0 has 96. I need to know this number when adding the
> > > GPIO secondary IRQ legacy domain. By calling orion_gpio_of_init() in
> > > the orion_add_irq_domain() i have this number to hand. If i used to
> > > entries in the match table, i would have to put this number into some
> > > global variable, or somehow ask the IRQ subsystem what the next free
> > > IRQ number is.
> >
> > But couldn't you store the number of interrupts for the primary controller
> > in a local variable? I think the of_irq code already guarantees that
> > the parent is probed first.
>
> Sure i could. But what is the advantage of that?
Probably not much. I've reread the of_irq_init code again and it seems that
the effect would be the same, perhaps appearing a little more similar to what
the other platforms do.
Please add my Acked-by: to your patch.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers
Date: Thu, 5 Jul 2012 15:47:37 +0000 [thread overview]
Message-ID: <201207051547.37906.arnd@arndb.de> (raw)
In-Reply-To: <20120705135449.GZ17534@lunn.ch>
On Thursday 05 July 2012, Andrew Lunn wrote:
> > > Orion use generic chip interrupts, both for the main interrupts and
> > > the GPIO interrupts. This does not yet support irq domain, so i have
> > > to layer a legacy domain on top. The legacy domain needs to know the
> > > first IRQ and the number of IRQs. For the primary IRQs that is
> > > easy. However, GPIO IRQ is not so easy, it depends on how many primary
> > > IRQs there are. This is not fixed. Orion5x has 32, Dove 64, kirkwood,
> > > 64, and mv78xx0 has 96. I need to know this number when adding the
> > > GPIO secondary IRQ legacy domain. By calling orion_gpio_of_init() in
> > > the orion_add_irq_domain() i have this number to hand. If i used to
> > > entries in the match table, i would have to put this number into some
> > > global variable, or somehow ask the IRQ subsystem what the next free
> > > IRQ number is.
> >
> > But couldn't you store the number of interrupts for the primary controller
> > in a local variable? I think the of_irq code already guarantees that
> > the parent is probed first.
>
> Sure i could. But what is the advantage of that?
Probably not much. I've reread the of_irq_init code again and it seems that
the effect would be the same, perhaps appearing a little more similar to what
the other platforms do.
Please add my Acked-by: to your patch.
Arnd
next prev parent reply other threads:[~2012-07-05 15:47 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-03 14:22 [PATCH v2 00/12] IRQ, GPIO SPI, I2C, etc DTC support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-1-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 14:22 ` [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-05 8:15 ` Andrew Lunn
[not found] ` <1341325365-21393-2-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 9:02 ` Thomas Petazzoni
2012-07-05 9:02 ` Thomas Petazzoni
2012-07-05 9:48 ` Andrew Lunn
2012-07-05 9:48 ` Andrew Lunn
2012-07-05 10:11 ` Arnaud Patard
2012-07-05 10:11 ` Arnaud Patard (Rtp)
[not found] ` <87sjd6ikkj.fsf-0gaJ4kiyQU6khWr4QmshqB2eb7JE58TQ@public.gmane.org>
2012-07-05 10:20 ` Thomas Petazzoni
2012-07-05 10:20 ` Thomas Petazzoni
2012-07-05 10:38 ` Arnaud Patard
2012-07-05 10:38 ` Arnaud Patard (Rtp)
[not found] ` <87liiyijb8.fsf-0gaJ4kiyQU6khWr4QmshqB2eb7JE58TQ@public.gmane.org>
2012-07-05 11:42 ` Thomas Petazzoni
2012-07-05 11:42 ` Thomas Petazzoni
2012-07-05 11:48 ` Andrew Lunn
2012-07-05 11:48 ` Andrew Lunn
[not found] ` <20120705114815.GT17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 12:09 ` Sebastian Hesselbarth
2012-07-05 12:09 ` Sebastian Hesselbarth
[not found] ` <20120705094824.GO17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 10:10 ` Thomas Petazzoni
2012-07-05 10:10 ` Thomas Petazzoni
2012-07-05 10:25 ` Andrew Lunn
2012-07-05 10:25 ` Andrew Lunn
2012-07-05 12:58 ` Thomas Petazzoni
2012-07-05 12:58 ` Thomas Petazzoni
2012-07-05 13:15 ` Andrew Lunn
2012-07-05 13:15 ` Andrew Lunn
[not found] ` <20120705131522.GW17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 13:28 ` Thomas Petazzoni
2012-07-05 13:28 ` Thomas Petazzoni
2012-07-05 13:33 ` Andrew Lunn
2012-07-05 13:36 ` Thomas Petazzoni
2012-07-05 12:25 ` Arnd Bergmann
2012-07-05 12:25 ` Arnd Bergmann
[not found] ` <201207051225.55390.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 13:08 ` Andrew Lunn
2012-07-05 13:08 ` Andrew Lunn
[not found] ` <20120705130819.GV17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 13:47 ` Arnd Bergmann
2012-07-05 13:47 ` Arnd Bergmann
[not found] ` <201207051347.38887.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 13:54 ` Andrew Lunn
2012-07-05 13:54 ` Andrew Lunn
[not found] ` <20120705135449.GZ17534-g2DYL2Zd6BY@public.gmane.org>
2012-07-05 15:47 ` Arnd Bergmann [this message]
2012-07-05 15:47 ` Arnd Bergmann
2012-07-05 14:14 ` Sebastian Hesselbarth
2012-07-05 14:14 ` Sebastian Hesselbarth
[not found] ` <4FF5A15A.8070309-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2012-07-05 14:43 ` Andrew Lunn
2012-07-05 14:43 ` Andrew Lunn
2012-07-05 14:54 ` Arnd Bergmann
2012-07-05 14:54 ` Arnd Bergmann
[not found] ` <201207051454.24475.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-05 15:51 ` Sebastian Hesselbarth
2012-07-05 15:51 ` Sebastian Hesselbarth
[not found] ` <4FF5B7F9.9020507-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2012-07-05 16:30 ` Arnaud Patard
2012-07-05 16:30 ` Arnaud Patard (Rtp)
2012-07-05 16:16 ` Andrew Lunn
2012-07-05 16:16 ` Andrew Lunn
[not found] ` <20120705161600.GA28860-g2DYL2Zd6BY@public.gmane.org>
2012-07-06 20:08 ` Arnd Bergmann
2012-07-06 20:08 ` Arnd Bergmann
[not found] ` <201207062008.23952.arnd-r2nGTMty4D4@public.gmane.org>
2012-07-06 21:00 ` Andrew Lunn
2012-07-06 21:00 ` Andrew Lunn
[not found] ` <20120706210009.GC11470-g2DYL2Zd6BY@public.gmane.org>
2012-07-07 0:24 ` Where to put a large bootloader-supplied device tree on ARM ? Mitch Bradley
2012-07-07 0:24 ` Mitch Bradley
[not found] ` <4FF781D8.3040206-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-07 1:23 ` David VomLehn (dvomlehn)
2012-07-07 1:23 ` David VomLehn (dvomlehn)
[not found] ` <2966DB01BC317A4DA23684BA0F653415013701-WE/xwOPrfQKHONfmNwMhBaBKnGwkPULj@public.gmane.org>
2012-07-07 1:59 ` Mitch Bradley
2012-07-07 1:59 ` Mitch Bradley
[not found] ` <4FF7980E.7050705-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-09 4:30 ` Nicolas Pitre
2012-07-09 4:30 ` Nicolas Pitre
[not found] ` <alpine.LFD.2.02.1207090015270.31100-QuJgVwGFrdf/9pzu0YdTqQ@public.gmane.org>
2012-07-12 6:52 ` Mitch Bradley
2012-07-12 6:52 ` Mitch Bradley
[not found] ` <4FFE743B.6080504-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-12 18:16 ` Nicolas Pitre
2012-07-12 18:16 ` Nicolas Pitre
2012-07-12 20:34 ` Rob Herring
2012-07-12 20:34 ` [U-Boot] " Rob Herring
2012-07-12 20:34 ` Rob Herring
2012-07-12 21:38 ` Albert ARIBAUD
2012-07-12 21:38 ` [U-Boot] " Albert ARIBAUD
2012-07-12 21:38 ` Albert ARIBAUD
2012-07-12 21:47 ` Wolfgang Denk
2012-07-12 21:47 ` [U-Boot] " Wolfgang Denk
2012-07-12 21:47 ` Wolfgang Denk
2012-07-13 1:28 ` Rob Herring
2012-07-13 1:28 ` [U-Boot] " Rob Herring
2012-07-13 1:28 ` Rob Herring
[not found] ` <4FFF79B6.6040508-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-13 6:45 ` Albert ARIBAUD
2012-07-05 18:36 ` [PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers Mitch Bradley
2012-07-05 18:36 ` Mitch Bradley
2012-07-03 14:22 ` [PATCH v2 02/12] SPI: Refactor spi-orion to use SPI framework queue Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 03/12] spi-orion: remove uneeded spi_info Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 04/12] spi-orion: add device tree binding Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 05/12] ARM: kirkwood: use devicetree for orion-spi Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 06/12] ARM: kirkwood: use devicetree for SPI on dreamplug Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 07/12] I2C: MV64XXX: Add Device Tree support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-8-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:59 ` Florian Fainelli
2012-07-03 15:59 ` Florian Fainelli
2012-07-03 16:58 ` Andrew Lunn
2012-07-03 16:58 ` Andrew Lunn
[not found] ` <20120703165839.GA1519-g2DYL2Zd6BY@public.gmane.org>
2012-07-04 19:49 ` Florian Fainelli
2012-07-04 19:49 ` Florian Fainelli
2012-07-05 6:52 ` Andrew Lunn
2012-07-05 6:52 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 08/12] Kirkwood: Add basic device tree support for QNAP TS219 Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-9-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:47 ` Florian Fainelli
2012-07-03 15:47 ` Florian Fainelli
2012-07-03 17:09 ` Andrew Lunn
2012-07-03 17:09 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 09/12] ARM: Kirkwood: DTify the watchdog timer Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 10/12] ATA: sata_mv: Add device tree support Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 11/12] ARM: Kirkwood: Use DT to configure SATA device Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-12-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 14:52 ` Josh Coombs
2012-07-03 14:52 ` Josh Coombs
[not found] ` <CAMW5Ufa2bsYs9VD2g9hJWKpcQNcZt+WXCA1ohYoHeLk9SambSg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-07-03 15:32 ` Andrew Lunn
2012-07-03 15:32 ` Andrew Lunn
2012-07-03 14:22 ` [PATCH v2 12/12] Crypto: CESA: Add support for DT based instantiation Andrew Lunn
2012-07-03 14:22 ` Andrew Lunn
[not found] ` <1341325365-21393-13-git-send-email-andrew-g2DYL2Zd6BY@public.gmane.org>
2012-07-03 15:50 ` Florian Fainelli
2012-07-03 15:50 ` Florian Fainelli
2012-07-03 17:03 ` Andrew Lunn
2012-07-03 17:03 ` Andrew Lunn
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