[PATCH 1/5] dt-bindings: pci: Add Sophgo SG2042 PCIe host

[Chen Wang]

From: Chen Wang <unicorn_wang at outlook.com>

Add binding for Sophgo SG2042 PCIe host controller.

Signed-off-by: Chen Wang <unicorn_wang at outlook.com>
---
 .../bindings/pci/sophgo,sg2042-pcie-host.yaml | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/sophgo,sg2042-pcie-host.yaml

diff --git a/Documentation/devicetree/bindings/pci/sophgo,sg2042-pcie-host.yaml b/Documentation/devicetree/bindings/pci/sophgo,sg2042-pcie-host.yaml
new file mode 100644
index 000000000000..d4d2232f354f
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/sophgo,sg2042-pcie-host.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/sophgo,sg2042-pcie-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo SG2042 PCIe Host (Cadence PCIe Wrapper)
+
+description: |+
+  Sophgo SG2042 PCIe host controller is based on the Cadence PCIe core.
+  It shares common features with the PCIe core and inherits common properties
+  defined in Documentation/devicetree/bindings/pci/cdns-pcie-host.yaml.
+
+maintainers:
+  - Chen Wang <unicorn_wang at outlook.com>
+
+properties:
+  compatible:
+    const: sophgo,sg2042-pcie-host
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: reg
+      - const: cfg
+
+  sophgo,syscon-pcie-ctrl:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to the SYSCON entry
+
+  sophgo,link-id:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Cadence IP link ID.
+
+  sophgo,internal-msi:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Identifies whether the PCIE node uses internal MSI controller.
+
+  vendor-id:
+    const: 0x1f1c
+
+  device-id:
+    const: 0x2042
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    const: msi
+
+allOf:
+  - $ref: cdns-pcie-host.yaml#
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - sophgo,syscon-pcie-ctrl
+  - sophgo,link-id
+  - vendor-id
+  - device-id
+  - ranges
+
+additionalProperties: true
+
+examples:
+  - |
+    pcie at 62000000 {
+      compatible = "sophgo,sg2042-pcie-host";
+      device_type = "pci";
+      reg = <0x62000000  0x00800000>,
+            <0x48000000  0x00001000>;
+      reg-names = "reg", "cfg";
+      #address-cells = <3>;
+      #size-cells = <2>;
+      ranges = <0x81000000 0 0x00000000 0xde000000 0 0x00010000>,
+               <0x82000000 0 0xd0400000 0xd0400000 0 0x0d000000>;
+      bus-range = <0x80 0xbf>;
+      vendor-id = <0x1f1c>;
+      device-id = <0x2042>;
+      cdns,no-bar-match-nbits = <48>;
+      sophgo,link-id = <0>;
+      sophgo,syscon-pcie-ctrl = <&cdns_pcie1_ctrl>;
+      sophgo,internal-msi;
+      interrupt-parent = <&intc>;
+    };
-- 
2.34.1