[PATCH v6 3/5] dt-bindings: Document Loongson PCI Host Controller

Jiaxun Yang
2020-04-27T06:06:38Z

PCI host controller found on Loongson PCHs and SoCs.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/pci/loongson.yaml | 62 +++++++++++++++++++
1 file changed, 62 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..78c5e32b2faa
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/loongson.yaml
@@ -0,0 +1,62 @@
+# 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,ls2k-pci
+ - const: loongson,ls7a-pci
+
+ reg:
+ minItems: 1
+ maxItems: 2
+ items:
+ - description: CFG0 standard config space register
+ - description: CFG1 extended config space register
+
+ ranges:
+ minItems: 1
+ maxItems: 3
+
+
+required:
+ - compatible
+ - reg
+ - ranges
+
+examples:
+ - |
+
+ bus {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ pcie@1a000000 {
+ compatible = "loongson,rs780e-pci";
+ device_type = "pci";
+ #address-cells = <3>;
+ #size-cells = <2>;
+
+ // CPU_PHYSICAL(2) SIZE(2)
+ reg = <0x0 0x1a000000 0x0 0x2000000>;
+
+ // BUS_ADDRESS(3) CPU_PHYSICAL(2) SIZE(2)
+ ranges = <0x01000000 0x0 0x00004000 0x0 0x00004000 0x0 0x00004000>,
+ <0x02000000 0x0 0x40000000 0x0 0x40000000 0x0 0x40000000>;
+ };
+ };
+...
--
2.26.0.rc2