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From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Matthew Minter <matthew_minter@xyratex.com>
Cc: "Thomas Petazzoni" <thomas.petazzoni@free-electrons.com>,
	"Neil Greatorex" <neil@fatboyfat.co.uk>,
	"Willy Tarreau" <w@1wt.eu>,
	"Gerlando Falauto" <gerlando.falauto@keymile.com>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	"Jason Cooper" <jason@lakedaemon.net>,
	"Gregory Clément" <gregory.clement@free-electrons.com>,
	"Ezequiel Garcia" <ezequiel.garcia@free-electrons.com>,
	"Andrew Lunn" <andrew@lunn.ch>,
	linux-pci@vger.kernel.org, "Tawfik Bayouk" <tawfik@marvell.com>,
	"Lior Amsalem" <alior@marvell.com>
Subject: Re: Fixing PCIe issues on Armada XP
Date: Fri, 11 Apr 2014 11:29:21 -0600	[thread overview]
Message-ID: <20140411172921.GA31254@obsidianresearch.com> (raw)
In-Reply-To: <CAFJTrDs4oOHCTNBcUnhQ6O0nXXA1WjbpWTPRce7vrgjzv=kQ_w@mail.gmail.com>

On Fri, Apr 11, 2014 at 06:21:08PM +0100, Matthew Minter wrote:

> I would also like to note, my board uses an external clock for the
> PCI ports, thus it is unlikely to be effected by any issues relating
> to clock drivers.

It doesn't matter, the clock in question is the internal divided CPU
synchronous clock that drives the PEX TLP logic. Externally sourcing
the PHY clock won't change the synchronous side.

Jason

WARNING: multiple messages have this Message-ID (diff)
From: jgunthorpe@obsidianresearch.com (Jason Gunthorpe)
To: linux-arm-kernel@lists.infradead.org
Subject: Fixing PCIe issues on Armada XP
Date: Fri, 11 Apr 2014 11:29:21 -0600	[thread overview]
Message-ID: <20140411172921.GA31254@obsidianresearch.com> (raw)
In-Reply-To: <CAFJTrDs4oOHCTNBcUnhQ6O0nXXA1WjbpWTPRce7vrgjzv=kQ_w@mail.gmail.com>

On Fri, Apr 11, 2014 at 06:21:08PM +0100, Matthew Minter wrote:

> I would also like to note, my board uses an external clock for the
> PCI ports, thus it is unlikely to be effected by any issues relating
> to clock drivers.

It doesn't matter, the clock in question is the internal divided CPU
synchronous clock that drives the PEX TLP logic. Externally sourcing
the PHY clock won't change the synchronous side.

Jason

  reply	other threads:[~2014-04-11 17:29 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-10 16:19 Fixing PCIe issues on Armada XP Thomas Petazzoni
2014-04-10 16:19 ` Thomas Petazzoni
2014-04-10 16:57 ` Jason Gunthorpe
2014-04-10 16:57   ` Jason Gunthorpe
2014-04-10 18:01   ` Thomas Petazzoni
2014-04-10 18:01     ` Thomas Petazzoni
2014-04-10 20:12     ` Jason Gunthorpe
2014-04-10 20:12       ` Jason Gunthorpe
2014-04-10 21:04       ` Thomas Petazzoni
2014-04-10 21:04         ` Thomas Petazzoni
2014-04-10 21:56       ` Neil Greatorex
2014-04-10 21:56         ` Neil Greatorex
2014-04-10 22:06         ` Jason Gunthorpe
2014-04-10 22:06           ` Jason Gunthorpe
2014-04-10 22:15           ` Neil Greatorex
2014-04-10 22:15             ` Neil Greatorex
2014-04-11 10:23         ` Thomas Petazzoni
2014-04-11 10:23           ` Thomas Petazzoni
2014-04-11 16:31           ` Jason Gunthorpe
2014-04-11 16:31             ` Jason Gunthorpe
2014-04-11 17:21             ` Matthew Minter
2014-04-11 17:21               ` Matthew Minter
2014-04-11 17:29               ` Jason Gunthorpe [this message]
2014-04-11 17:29                 ` Jason Gunthorpe
2014-04-18 13:02             ` Thomas Petazzoni
2014-04-18 13:02               ` Thomas Petazzoni
2014-04-22 17:34               ` Jason Gunthorpe
2014-04-22 17:34                 ` Jason Gunthorpe
2014-04-18 12:58         ` Thomas Petazzoni
2014-04-18 12:58           ` Thomas Petazzoni
2014-04-22 17:56           ` Jason Gunthorpe
2014-04-22 17:56             ` Jason Gunthorpe
2014-04-10 17:10 ` Willy Tarreau
2014-04-10 17:10   ` Willy Tarreau
2014-04-10 18:02   ` Thomas Petazzoni
2014-04-10 18:02     ` Thomas Petazzoni
2014-04-10 23:13     ` Willy Tarreau
2014-04-10 23:13       ` Willy Tarreau
2014-04-10 23:40       ` Jason Gunthorpe
2014-04-10 23:40         ` Jason Gunthorpe
2014-04-11  6:23         ` Willy Tarreau
2014-04-11  6:23           ` Willy Tarreau
2014-04-10 18:20 ` Neil Greatorex
2014-04-10 18:20   ` Neil Greatorex
2014-04-10 21:07   ` Thomas Petazzoni
2014-04-10 21:07     ` Thomas Petazzoni
2014-04-11 14:32 ` Thomas Petazzoni
2014-04-11 14:32   ` Thomas Petazzoni
2014-04-11 15:57   ` Neil Greatorex
2014-04-11 15:57     ` Neil Greatorex

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