From patchwork Wed Apr  1 03:06:47 2020
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From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
 Bjorn Helgaas <bhelgaas@google.com>, Rob Herring <robh+dt@kernel.org>,
 Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
 Huacai Chen <chenhc@lemote.com>,
 Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
 Andrew Murray <amurray@thegoodpenguin.co.uk>,
 Paul Burton <paulburton@kernel.org>, linux-pci@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Message-ID: <20200401030658.1174045-4-jiaxun.yang@flygoat.com>
Subject: [PATCH v2 3/5] dt-bindings: Document Loongson PCI Host Controller
Date: Wed,  1 Apr 2020 11:06:47 +0800
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PCI host controller found on Loongson PCHs and SoCs.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 .../devicetree/bindings/pci/loongson.yaml     | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/loongson.yaml

diff --git a/Documentation/devicetree/bindings/pci/loongson.yaml b/Documentation/devicetree/bindings/pci/loongson.yaml
new file mode 100644
index 000000000000..2995437ef61a
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/loongson.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/loongson.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson PCI Host Controller
+
+maintainers:
+  - Jiaxun Yang <jiaxun.yang@flygoat.com>
+
+description: |+
+  PCI host controller found on Loongson PCHs and SoCs.
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: loongson,rs780e-pci
+      - const: loongson,ls7a-pci
+      - const: loongson,ls2k-pci
+
+  reg:
+    minItems: 1
+    maxItems: 2
+    items:
+      - description: CFG0 standard config space register
+      - description: CFG1 extended config space register
+
+  ranges:
+    maxItems: 3
+
+
+required:
+  - compatible
+  - reg
+  - ranges
+
+examples:
+  - |
+
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+        pcie@40000000 {
+            compatible = "loongson,rs780e-pci";
+            device_type = "pci";
+            #address-cells = <3>;
+            #size-cells = <2>;
+
+            reg = <0 0x1a000000 0 0x0200000>;
+            ranges = <0x02000000 0 0x40000000 0 0x40000000 0 0x40000000>;
+        };
+    };
+...