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dt-bindings: PCI: Add DT bindings for PCI designware EP mode

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Add device tree binding documentation for PCI designware EP mode.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Kishon Vijay Abraham I 2017-03-27 15:15:06 +05:30 committed by Bjorn Helgaas
parent f8aed6ec62
commit b12befecd7
1 changed files with 18 additions and 8 deletions
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26
Documentation/devicetree/bindings/pci/designware-pcie.txt
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@ -6,30 +6,40 @@ Required properties:
- reg-names: Must be "config" for the PCIe configuration space.
(The old way of getting the configuration address space from "ranges"
is deprecated and should be avoided.)
- num-lanes: number of lanes to use
RC mode:
- #address-cells: set to <3>
- #size-cells: set to <2>
- device_type: set to "pci"
- ranges: ranges for the PCI memory and I/O regions
- #interrupt-cells: set to <1>
- interrupt-map-mask and interrupt-map: standard PCI properties
to define the mapping of the PCIe interface to interrupt
- 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
EP mode:
- num-ib-windows: number of inbound address translation
windows
- num-ob-windows: number of outbound address translation
windows
Optional properties:
- num-viewport: number of view ports configured in hardware. If a platform
does not specify it, the driver assumes 2.
- 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
is assumed if not present)
- 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:
- "pcie"
- "pcie_bus"
RC mode:
- num-viewport: number of view ports configured in
hardware. If a platform does not specify it, the driver assumes 2.
- 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 is assumed if not present)
EP mode:
- max-functions: maximum number of functions that can be
configured
Example configuration: