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| author | Gabriele Paoloni <gabriele.paoloni@huawei.com> | 2015-09-28 19:03:10 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-11-02 23:48:45 +0300 |
| commit | 907fce0902539ecde609e485eb2ecd7119a7a623 (patch) | |
| tree | 158e8616fa813e0d0e2aa9a285f9de0f22317143 /Documentation/devicetree/bindings/pci | |
| parent | b6b18f589e1ddbfbc31f72ea7fb8a723a2d10058 (diff) | |
| download | linux-907fce0902539ecde609e485eb2ecd7119a7a623.tar.xz | |
PCI: designware: Make "num-lanes" an optional DT property
Currently "num-lanes" is read in dw_pcie_host_init(), but it is only used
if we call dw_pcie_setup_rc() while bringing up the link. If the link has
already been brought up by firmware, we need not call dw_pcie_setup_rc(),
and "num-lanes" is unnecessary.
Only complain about "num-lanes" if we actually need it and we didn't find a
valid value.
[bhelgaas: changelog]
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'Documentation/devicetree/bindings/pci')
| -rw-r--r-- | Documentation/devicetree/bindings/pci/designware-pcie.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt index 9f4faa8e8d00..0036ab3065b8 100644 --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt @@ -14,7 +14,6 @@ Required properties: - interrupt-map-mask and interrupt-map: standard PCI properties to define the mapping of the PCIe interface to interrupt numbers. -- num-lanes: number of lanes to use - clocks: Must contain an entry for each entry in clock-names. See ../clocks/clock-bindings.txt for details. - clock-names: Must include the following entries: @@ -22,6 +21,8 @@ Required properties: - "pcie_bus" Optional properties: +- num-lanes: number of lanes to use (this property should be specified unless + the link is brought already up in BIOS) - reset-gpio: gpio pin number of power good signal - bus-range: PCI bus numbers covered (it is recommended for new devicetrees to specify this property, to keep backwards compatibility a range of 0x00-0xff |