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From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 04/14] bus: mvebu-mbus: Add static window allocation to the DT binding
Date: Wed, 12 Jun 2013 22:45:55 +0200	[thread overview]
Message-ID: <201306122245.55960.arnd@arndb.de> (raw)
In-Reply-To: <20130612111441.E6D603E0A56@localhost>

On Wednesday 12 June 2013, Grant Likely wrote:
> I think we should have almost everything needed already to do this.
> of_bus allows arbitrary mapping code to be used at any stage in the
> translation. We might need to add some glue so that of_busses[] can
> be assembled by the linker to allow an mbus of_bus stanza to live
> outside of drivers/of/address.c
> 

Actually, the best thing about this solution is that we don't even
have to bother setting up the mappings when loading the mbus driver:
We don't need any ranges (other than internal-regs) in DT, and we
don't need complex logic to search through the child devices to
figure out what the mappings should be. The only thing one needs
to do here is check if a mapping already exists when we get into the
of_bus handler and create one for the device being translated if
there isn't one!

	Arnd

WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Lior Amsalem <alior-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
	Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org>,
	Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
	devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
	Jason Gunthorpe
	<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
	Maen Suleiman <maen-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Sebastian Hesselbarth
	<sebastian.hesselbarth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 04/14] bus: mvebu-mbus: Add static window allocation to the DT binding
Date: Wed, 12 Jun 2013 22:45:55 +0200	[thread overview]
Message-ID: <201306122245.55960.arnd@arndb.de> (raw)
In-Reply-To: <20130612111441.E6D603E0A56@localhost>

On Wednesday 12 June 2013, Grant Likely wrote:
> I think we should have almost everything needed already to do this.
> of_bus allows arbitrary mapping code to be used at any stage in the
> translation. We might need to add some glue so that of_busses[] can
> be assembled by the linker to allow an mbus of_bus stanza to live
> outside of drivers/of/address.c
> 

Actually, the best thing about this solution is that we don't even
have to bother setting up the mappings when loading the mbus driver:
We don't need any ranges (other than internal-regs) in DT, and we
don't need complex logic to search through the child devices to
figure out what the mappings should be. The only thing one needs
to do here is check if a mapping already exists when we get into the
of_bus handler and create one for the device being translated if
there isn't one!

	Arnd

  reply	other threads:[~2013-06-12 20:45 UTC|newest]

Thread overview: 136+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-07 16:47 [PATCH 00/14] MBus device tree binding Ezequiel Garcia
2013-06-07 16:47 ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 01/14] bus: mvebu-mbus: Use pr_fmt Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:56   ` Thomas Petazzoni
2013-06-07 16:56     ` Thomas Petazzoni
2013-06-08 14:15   ` Jason Cooper
2013-06-08 14:15     ` Jason Cooper
2013-06-07 16:47 ` [PATCH 02/14] bus: mvebu-mbus: Factor out initialization details Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 03/14] bus: mvebu-mbus: Introduce device tree binding Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 19:10   ` Arnd Bergmann
2013-06-07 19:10     ` Arnd Bergmann
2013-06-07 19:44     ` Jason Gunthorpe
2013-06-07 19:44       ` Jason Gunthorpe
2013-06-07 19:53       ` Arnd Bergmann
2013-06-07 19:53         ` Arnd Bergmann
2013-06-07 20:09         ` Jason Gunthorpe
2013-06-07 20:09           ` Jason Gunthorpe
2013-06-07 21:15           ` Arnd Bergmann
2013-06-07 21:15             ` Arnd Bergmann
2013-06-08  0:26             ` Jason Gunthorpe
2013-06-08  0:26               ` Jason Gunthorpe
2013-06-08 17:29       ` Ezequiel Garcia
2013-06-08 17:29         ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 04/14] bus: mvebu-mbus: Add static window allocation to the DT binding Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 19:01   ` Arnd Bergmann
2013-06-07 19:01     ` Arnd Bergmann
2013-06-07 20:00     ` Jason Gunthorpe
2013-06-07 20:00       ` Jason Gunthorpe
2013-06-07 21:07       ` Arnd Bergmann
2013-06-07 21:07         ` Arnd Bergmann
2013-06-08 18:38       ` Ezequiel Garcia
2013-06-08 18:38         ` Ezequiel Garcia
2013-06-09  1:45         ` Jason Gunthorpe
2013-06-09  1:45           ` Jason Gunthorpe
2013-06-09 14:39           ` Ezequiel Garcia
2013-06-09 14:39             ` Ezequiel Garcia
2013-06-11 13:57           ` Ezequiel Garcia
2013-06-11 13:57             ` Ezequiel Garcia
2013-06-11 15:26             ` Arnd Bergmann
2013-06-11 15:26               ` Arnd Bergmann
2013-06-11 21:50               ` Jason Gunthorpe
2013-06-11 21:50                 ` Jason Gunthorpe
2013-06-11 22:22                 ` Sebastian Hesselbarth
2013-06-11 22:22                   ` Sebastian Hesselbarth
2013-06-11 23:02                   ` Arnd Bergmann
2013-06-11 23:02                     ` Arnd Bergmann
2013-06-11 23:08                   ` Jason Gunthorpe
2013-06-11 23:08                     ` Jason Gunthorpe
2013-06-12  7:37                     ` Sebastian Hesselbarth
2013-06-12  7:37                       ` Sebastian Hesselbarth
2013-06-11 22:34                 ` Arnd Bergmann
2013-06-11 22:34                   ` Arnd Bergmann
2013-06-11 22:58                   ` Jason Gunthorpe
2013-06-11 22:58                     ` Jason Gunthorpe
2013-06-11 23:10                     ` Arnd Bergmann
2013-06-11 23:10                       ` Arnd Bergmann
2013-06-12 11:14                   ` Grant Likely
2013-06-12 11:14                     ` Grant Likely
2013-06-12 20:45                     ` Arnd Bergmann [this message]
2013-06-12 20:45                       ` Arnd Bergmann
2013-06-12 21:12                       ` Ezequiel Garcia
2013-06-12 21:12                         ` Ezequiel Garcia
2013-06-12 21:26                         ` Jason Gunthorpe
2013-06-12 21:26                           ` Jason Gunthorpe
2013-06-12 21:36                           ` Ezequiel Garcia
2013-06-12 21:36                             ` Ezequiel Garcia
2013-06-12 21:52                             ` Arnd Bergmann
2013-06-12 21:52                               ` Arnd Bergmann
2013-06-12 22:02                               ` Jason Gunthorpe
2013-06-12 22:02                                 ` Jason Gunthorpe
2013-06-12 22:20                                 ` Arnd Bergmann
2013-06-12 22:20                                   ` Arnd Bergmann
2013-06-12 22:24                                   ` Arnd Bergmann
2013-06-12 22:24                                     ` Arnd Bergmann
2013-06-15 16:03                           ` Grant Likely
2013-06-15 16:03                             ` Grant Likely
2013-06-12 20:02                 ` Ezequiel Garcia
2013-06-12 20:02                   ` Ezequiel Garcia
2013-06-12 20:12                   ` Jason Gunthorpe
2013-06-12 20:12                     ` Jason Gunthorpe
2013-06-12 21:50                   ` Arnd Bergmann
2013-06-12 21:50                     ` Arnd Bergmann
2013-06-12 11:07               ` Grant Likely
2013-06-12 11:07                 ` Grant Likely
2013-06-12 11:43                 ` Arnd Bergmann
2013-06-12 11:43                   ` Arnd Bergmann
2013-06-12 11:54                   ` Grant Likely
2013-06-12 11:54                     ` Grant Likely
2013-06-12 11:58                     ` Arnd Bergmann
2013-06-12 11:58                       ` Arnd Bergmann
2013-06-12 10:52           ` Grant Likely
2013-06-12 10:52             ` Grant Likely
2013-06-09 13:42         ` Arnd Bergmann
2013-06-09 13:42           ` Arnd Bergmann
2013-06-09 14:34           ` Ezequiel Garcia
2013-06-09 14:34             ` Ezequiel Garcia
2013-06-09 15:37             ` Arnd Bergmann
2013-06-09 15:37               ` Arnd Bergmann
2013-06-12 10:48         ` Grant Likely
2013-06-12 10:48           ` Grant Likely
2013-06-11 13:31     ` Ezequiel Garcia
2013-06-11 13:31       ` Ezequiel Garcia
2013-06-11 15:02       ` Arnd Bergmann
2013-06-11 15:02         ` Arnd Bergmann
2013-06-07 16:47 ` [PATCH 05/14] bus: mvebu-mbus: Update the mbus-compatible node's ranges property Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-12 10:25   ` Grant Likely
2013-06-12 10:25     ` Grant Likely
2013-06-07 16:47 ` [PATCH 06/14] ARM: mvebu: Initialize MBus using the DT binding Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 07/14] ARM: mvebu: Remove the harcoded BootROM window allocation Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 08/14] memory: mvebu-devbus: Remove address decoding window workaround Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 09/14] ARM: mvebu: Add MBus to Armada 370/XP device tree Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 10/14] ARM: mvebu: Add BootROM " Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 11/14] ARM: mvebu: Relocate Armada 370/XP DeviceBus device tree nodes Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 19:18   ` Arnd Bergmann
2013-06-07 19:18     ` Arnd Bergmann
2013-06-07 16:47 ` [PATCH 12/14] ARM: mvebu: Remove device tree unused properties on A370 Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:56   ` Thomas Petazzoni
2013-06-07 16:56     ` Thomas Petazzoni
2013-06-08 14:18   ` Jason Cooper
2013-06-08 14:18     ` Jason Cooper
2013-06-07 16:47 ` [PATCH 13/14] ARM: mvebu: Relocate Armada 370 PCIe device tree nodes Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia
2013-06-07 16:47 ` [PATCH 14/14] ARM: mvebu: Relocate Armada XP " Ezequiel Garcia
2013-06-07 16:47   ` Ezequiel Garcia

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