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

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Date:   Thu, 23 Nov 2017 16:01:47 +0100
From:   Cyrille Pitchen <cyrille.pitchen@...e-electrons.com>
To:     bhelgaas@...gle.com, kishon@...com, lorenzo.pieralisi@....com,
        linux-pci@...r.kernel.org
Cc:     adouglas@...ence.com, stelford@...ence.com, dgary@...ence.com,
        kgopi@...ence.com, eandrews@...ence.com,
        thomas.petazzoni@...e-electrons.com, sureshp@...ence.com,
        nsekhar@...com, linux-kernel@...r.kernel.org, robh@...nel.org,
        devicetree@...r.kernel.org,
        Cyrille Pitchen <cyrille.pitchen@...e-electrons.com>
Subject: [PATCH 2/5] dt-bindings: PCI: cadence: Add DT bindings for Cadence PCIe host controller

From: Scott Telford <stelford@...ence.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@...ence.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...e-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@...00000 {
+		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