[PATCH 2/5] dt-bindings: PCI: cadence: Add DT bindings for Cadence PCIe host controller

Cyrille Pitchen
2017-11-23T15:20:43Z

From: Scott Telford <stelford@cadence.com>

This patch adds documentation for the DT bindings of the Cadence PCIe
controller when configured in host (Root Complex) mode.

Signed-off-by: Scott Telford <stelford@cadence.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>

dt-bindings: PCI: cadence: host fixup
---
.../bindings/pci/cdns,cdns-pcie-host.txt | 54 ++++++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.txt

diff --git a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.txt b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.txt
new file mode 100644
index 000000000000..4b3df8ffd5e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.txt
@@ -0,0 +1,54 @@
+* Cadence PCIe host controller
+
+This PCIe controller inherits the base properties defined in
+host-generic-pci.txt.
+
+Required properties:
+- compatible: should contain "cdns,cdns-pcie-host" to identify the IP used.
+- reg: Should contain the PCIe configuration window base address, controller
+ register base address, and AXI interface region base address respectively.
+- reg-names: Must be "cfg", "reg" and "mem" respectively.
+- #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
+ numbers.
+
+Example:
+
+ pci@fb000000 {
+ compatible = "cdns,cdns-pcie-host";
+ device_type = "pci";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ bus-range = <0x0 0xff>;
+ linux,pci-domain = <0>;
+
+ // CPU_PHYSICAL(2) SIZE(2)
+ reg = <0x0 0x41000000 0x0 0x00001000>, /* Config space */
+ <0x0 0xfb000000 0x0 0x01000000>, /* Base Address */
+ <0x0 0x40000000 0x0 0x04000000>; /* AXI region */
+ reg-names = "cfg", "reg", "mem";
+
+ // BUS_ADDRESS(3) CPU_PHYSICAL(1) SIZE(2)
+ ranges =
+ <0x02000000 0x0 0x42000000 0x0 0x42000000 0x0 0x1000000>,
+ <0x01000000 0x0 0x43000000 0x0 0x43000000 0x0 0x0010000>;
+
+
+ #interrupt-cells = <0x1>;
+
+ // PCI_DEVICE(3) INT#(1) CONTROLLER(PHANDLE) CONTROLLER_DATA(5)
+ interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0x0 0x0 14 0x1
+ 0x0 0x0 0x0 0x2 &gic 0x0 0x0 0x0 15 0x1
+ 0x0 0x0 0x0 0x3 &gic 0x0 0x0 0x0 16 0x1
+ 0x0 0x0 0x0 0x4 &gic 0x0 0x0 0x0 17 0x1>;
+
+ // PCI_DEVICE(3) INT#(1)
+ interrupt-map-mask = <0x0000 0x0 0x0 0x7>;
+
+ msi-parent = <&its_pci>;
+ };
--
2.11.0