PCI: tegra: Implement PCA enable workaround

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Tegra210's PCIe controller has a bug that requires the PCA (performance
counter) feature to be enabled. If this isn't done, accesses to device
configuration space will hang the chip for tens of seconds. Implement the
workaround.

Based on commit 514e19138af2 ("pci: tegra: implement PCA enable
workaround") from U-Boot by Stephen Warren <swarren@nvidia.com>.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>

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Thierry Reding 2016-11-25 11:57:14 +01:00 • committed by Bjorn Helgaas

parent 528925c439

commit 76245ca2df

1 changed files with 13 additions and 0 deletions

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drivers/pci/host/pci-tegra.c

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