From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Mitch Bradley <wmb@firmworks.com>,
Lior Amsalem <alior@marvell.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
linux-pci@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
Eran Ben-Avi <benavi@marvell.com>,
Nadav Haklai <nadavh@marvell.com>,
Maen Suleiman <maen@marvell.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Shadi Ammouri <shadi@marvell.com>,
Tawfik Bayouk <tawfik@marvell.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 24/32] pci: PCIe driver for Marvell Armada 370/XP systems
Date: Wed, 13 Mar 2013 11:02:05 -0600 [thread overview]
Message-ID: <20130313170205.GB24042@obsidianresearch.com> (raw)
In-Reply-To: <20130313081815.GD25940@avionic-0098.mockup.avionic-design.de>
On Wed, Mar 13, 2013 at 09:18:15AM +0100, Thierry Reding wrote:
> Mitch already answered this. The specification is now almost 15 years
> old and it couldn't possibly have foreseen all of the future use-cases.
> If the specification is too restrictive and Mitch gives his blessing to
> remove some of the restrictions, I don't see any reason why we shouldn't
> do so if it lets us represent the reality of hardware more accurately in
> DT.
I understand the spec is old, and I have no problem with making a
Linux specific revision, but do *that* - don't bury some random
deviation inside the bindings for a driver. I even suggested some
language, but I feel more thought is needed to consider how to model
the standardized ECAM mechanism..
> Furthermore we're not discussing radical changes. None of the changes
> will be backwards-incompatible, but they will allow recent hardware to
> be represented more correctly or conveniently.
Sure, but it is still inconsistent, one MMIO config mechansim is in
ranges, one is in regs. Plus I don't think tegra's case is a great
starting point to design a spec update, it's config access mechanism
is especially strange...
Anyhow, I think this has been hashed to death, as long as your final
binding has the 'device_type = pci' on the pcie-controller node I
think it will be fine.
Jason
next prev parent reply other threads:[~2013-03-13 17:02 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1360686546-24277-1-git-send-email-thomas.petazzoni@free-electrons.com>
[not found] ` <1360686546-24277-25-git-send-email-thomas.petazzoni@free-electrons.com>
[not found] ` <20130212223511.GB31555@obsidianresearch.com>
[not found] ` <20130306105441.4d24033e@skate>
[not found] ` <20130306121118.GA17079@avionic-0098.mockup.avionic-design.de>
[not found] ` <20130306180946.GA2433@obsidianresearch.com>
[not found] ` <20130307080832.GD3451@avionic-0098.mockup.avionic-design.de>
[not found] ` <20130307174955.GC20840@obsidianresearch.com>
[not found] ` <20130307194830.GA1811@avionic-0098.mockup.avionic-design.de>
[not found] ` <20130307200235.GB20695@obsidianresearch.com>
[not found] ` <20130307200235.GB20695-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-07 20:47 ` [PATCH 24/32] pci: PCIe driver for Marvell Armada 370/XP systems Thierry Reding
2013-03-08 0:05 ` Rob Herring
2013-03-08 7:14 ` Thierry Reding
2013-03-08 16:52 ` Jason Gunthorpe
2013-03-08 19:12 ` Thierry Reding
[not found] ` <20130308191227.GA6551-RM9K5IK7kjIQXX3q8xo1gnVAuStQJXxyR5q1nwbD4aMs9pC9oP6+/A@public.gmane.org>
2013-03-08 19:43 ` Mitch Bradley
2013-03-08 20:02 ` Jason Gunthorpe
[not found] ` <20130308200245.GC29435-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-08 20:13 ` Thierry Reding
2013-03-10 15:09 ` Thomas Petazzoni
2013-03-11 8:08 ` Thierry Reding
2013-03-08 23:46 ` Mitch Bradley
2013-03-09 1:31 ` Jason Gunthorpe
[not found] ` <20130309013152.GA3883-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-10 4:52 ` Mitch Bradley
2013-03-10 6:55 ` Jason Gunthorpe
[not found] ` <20130310065539.GA14704-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-11 5:46 ` Mitch Bradley
[not found] ` <513D6F9C.9000100-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2013-03-11 7:46 ` Thierry Reding
[not found] ` <20130311074615.GA6365-RM9K5IK7kjIQXX3q8xo1gnVAuStQJXxyR5q1nwbD4aMs9pC9oP6+/A@public.gmane.org>
2013-03-11 18:04 ` Mitch Bradley
2013-03-11 18:23 ` Jason Gunthorpe
[not found] ` <20130311182339.GB10992-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-11 19:49 ` Mitch Bradley
2013-03-11 18:15 ` Jason Gunthorpe
[not found] ` <20130311181554.GA10992-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-11 21:50 ` Mitch Bradley
2013-03-11 23:25 ` Jason Gunthorpe
[not found] ` <20130311232516.GA13873-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-11 23:38 ` Mitch Bradley
[not found] ` <513E6AFE.3090304-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2013-03-12 7:08 ` Thierry Reding
2013-03-12 15:57 ` Jason Gunthorpe
2013-03-12 20:38 ` Thierry Reding
2013-03-12 21:03 ` Jason Gunthorpe
2013-03-12 21:30 ` Thierry Reding
2013-03-12 22:08 ` Jason Gunthorpe
2013-03-12 23:25 ` Mitch Bradley
2013-03-13 8:18 ` Thierry Reding
2013-03-13 17:02 ` Jason Gunthorpe [this message]
[not found] ` <20130313170205.GB24042-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-13 19:26 ` Thierry Reding
2013-03-13 19:59 ` Jason Gunthorpe
2013-03-13 20:54 ` Thierry Reding
2013-03-13 20:58 ` Mitch Bradley
2013-03-13 21:33 ` Thierry Reding
2013-03-13 22:48 ` Mitch Bradley
2013-03-14 0:43 ` Rob Herring
2013-03-14 1:20 ` Mitch Bradley
2013-03-14 7:11 ` Thierry Reding
2013-03-14 4:56 ` Stephen Warren
[not found] ` <5140E85A.3040900-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2013-03-13 22:02 ` Thierry Reding
2013-03-13 22:21 ` Jason Gunthorpe
2013-03-14 9:01 ` Thierry Reding
2013-03-14 17:25 ` Jason Gunthorpe
2013-03-14 20:38 ` Thierry Reding
2013-03-14 21:05 ` Jason Gunthorpe
2013-03-14 21:10 ` Mitch Bradley
2013-03-14 21:09 ` Thierry Reding
2013-03-14 21:29 ` Jason Gunthorpe
2013-03-14 21:37 ` Thierry Reding
2013-03-13 22:22 ` Jason Gunthorpe
2013-03-09 8:58 ` Thomas Petazzoni
2013-03-08 23:12 ` Rob Herring
[not found] ` <513A7044.1020700-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-03-09 11:10 ` Thierry Reding
2013-03-10 5:04 ` Mitch Bradley
2013-03-10 15:06 ` Thomas Petazzoni
2013-03-10 18:33 ` Mitch Bradley
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