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| author | Jon Hunter <jonathanh@nvidia.com> | 2020-02-14 16:53:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-23 11:36:30 +0300 |
| commit | d7b59cd020f73c36b58dd504a302e70fe3e0ec96 (patch) | |
| tree | 9fe5188f14503cf1d7cdc61393c77e7ef3ed9848 /Documentation/devicetree | |
| parent | 5615f66bfdfcab40cabce3b09e8db7a8457f81e7 (diff) | |
| download | linux-d7b59cd020f73c36b58dd504a302e70fe3e0ec96.tar.xz | |
arm64: tegra: Fix Tegra194 PCIe compatible string
[ Upstream commit f9f711efd441ad0d22874be49986d92121862335 ]
If the kernel configuration option CONFIG_PCIE_DW_PLAT_HOST is enabled
then this can cause the kernel to incorrectly probe the generic
designware PCIe platform driver instead of the Tegra194 designware PCIe
driver. This causes a boot failure on Tegra194 because the necessary
configuration to access the hardware is not performed.
The order in which the compatible strings are populated in Device-Tree
is not relevant in this case, because the kernel will attempt to probe
the device as soon as a driver is loaded and if the generic designware
PCIe driver is loaded first, then this driver will be probed first.
Therefore, to fix this problem, remove the "snps,dw-pcie" string from
the compatible string as we never want this driver to be probe on
Tegra194.
Fixes: 2602c32f15e7 ("arm64: tegra: Add P2U and PCIe controller nodes to Tegra194 DT")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt index b739f92da58e..1f90eb39870b 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt @@ -118,7 +118,7 @@ Tegra194: -------- pcie@14180000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>; reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */ |