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Message-ID: <50EF55B0.7030106@wwwdotorg.org>
Date:	Thu, 10 Jan 2013 16:58:40 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Thierry Reding <thierry.reding@...onic-design.de>
CC:	linux-tegra@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Russell King <linux@....linux.org.uk>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Andrew Murray <andrew.murray@....com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 13/14] ARM: tegra: harmony: Initialize PCIe from DT

On 01/09/2013 01:43 PM, Thierry Reding wrote:
> With the device tree support in place, probe the PCIe controller from
> the device tree and remove the corresponding workaround in the board
> file.

For some reason, the ports on Harmony fail to initialize correctly with
this driver, although they do with plain next-20130109:

> [    2.698922] tegra-pcie 80003000.pcie-controller: link 0 down, retrying
> [    2.925722] tegra-pcie 80003000.pcie-controller: link 0 down, retrying
> [    3.155411] tegra-pcie 80003000.pcie-controller: link 0 down, retrying
> [    3.178428] tegra-pcie 80003000.pcie-controller: link 0 down, ignoring
> [    3.199713] tegra-pcie 80003000.pcie-controller: failed to add port pci: -19

^^^ There's definitely something plugged into this port, and it's
enumerated OK with the old driver.

> [    3.433551] tegra-pcie 80003000.pcie-controller: link 1 down, retrying
> [    3.667624] tegra-pcie 80003000.pcie-controller: link 1 down, retrying
...
> [    3.901493] tegra-pcie 80003000.pcie-controller: link 1 down, retrying
> [    3.902589] tegra-pcie 80003000.pcie-controller: link 1 down, ignoring
> [    3.902615] tegra-pcie 80003000.pcie-controller: failed to add port pci: -19
> [    3.903780] tegra-pcie 80003000.pcie-controller: PCI host bridge to bus 0000:00
> [    3.903815] pci_bus 0000:00: root bus resource [io  0x82000000-0x8200ffff]
> [    3.903844] pci_bus 0000:00: root bus resource [mem 0xa0000000-0xafffffff]
> [    3.903871] pci_bus 0000:00: root bus resource [mem 0xb0000000-0xbfffffff pref]
> [    3.903901] pci_bus 0000:00: root bus resource [bus 00-ff]

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