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dt-bindings: add DT binding for the Aardvark PCIe controller 

Add the documentation for the Device Tree binding for the Aardvark PCIe
controller, found on Marvell Armada 3700 ARM64 SoCs.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.1
Thomas Petazzoni 2016-06-30 11:32:30 +02:00 committed by Bjorn Helgaas
parent af8c34ce6a
commit 0a00ab1204
1 changed files with 56 additions and 0 deletions
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56
Documentation/devicetree/bindings/pci/aardvark-pci.txt 100644
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Aardvark PCIe controller
This PCIe controller is used on the Marvell Armada 3700 ARM64 SoC.
The Device Tree node describing an Aardvark PCIe controller must
contain the following properties:
- compatible: Should be "marvell,armada-3700-pcie"
- reg: range of registers for the PCIe controller
- interrupts: the interrupt line of the PCIe controller
- #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>
- msi-controller: indicates that the PCIe controller can itself
handle MSI interrupts
- msi-parent: pointer to the MSI controller to be used
- interrupt-map-mask and interrupt-map: standard PCI properties to
define the mapping of the PCIe interface to interrupt numbers.
- bus-range: PCI bus numbers covered
In addition, the Device Tree describing an Aardvark PCIe controller
must include a sub-node that describes the legacy interrupt controller
built into the PCIe controller. This sub-node must have the following
properties:
- interrupt-controller
- #interrupt-cells: set to <1>
Example:
pcie0: pcie@d0070000 {
compatible = "marvell,armada-3700-pcie";
device_type = "pci";
status = "disabled";
reg = <0 0xd0070000 0 0x20000>;
#address-cells = <3>;
#size-cells = <2>;
bus-range = <0x00 0xff>;
interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
#interrupt-cells = <1>;
msi-controller;
msi-parent = <&pcie0>;
ranges = <0x82000000 0 0xe8000000 0 0xe8000000 0 0x1000000 /* Port 0 MEM */
0x81000000 0 0xe9000000 0 0xe9000000 0 0x10000>; /* Port 0 IO*/
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc 0>,
<0 0 0 2 &pcie_intc 1>,
<0 0 0 3 &pcie_intc 2>,
<0 0 0 4 &pcie_intc 3>;
pcie_intc: interrupt-controller {
interrupt-controller;
#interrupt-cells = <1>;
};
};