[PATCH 2/2] dt-bindings: display: Add Loongson display controller

[suijingfeng]

This patch add a trival DT usages for loongson display controller found
in LS2k1000 SoC.

Signed-off-by: suijingfeng <suijingfeng at loongson.cn>
---
 .../loongson/loongson,display-controller.yaml | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/loongson/loongson,display-controller.yaml

diff --git a/Documentation/devicetree/bindings/display/loongson/loongson,display-controller.yaml b/Documentation/devicetree/bindings/display/loongson/loongson,display-controller.yaml
new file mode 100644
index 000000000000..98b78f449a80
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/loongson/loongson,display-controller.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/loongson/loongson,display-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson Display Controller Device Tree Bindings
+
+maintainers:
+  - Sui Jingfeng <suijingfeng at loongson.cn>
+
+description: |+
+
+  The display controller is a PCI device, it has two display pipe.
+  For the DC in LS2K1000 each way has a DVO output interface which
+  provide RGB888 signals, vertical & horizontal synchronisations
+  and the pixel clock. Each CRTC is able to support 1920x1080 at 60Hz,
+  the maximum resolution is 2048x2048 according to the hardware spec.
+
+properties:
+  $nodename:
+    pattern: "^display-controller@[0-9a-f],[0-9a-f]$"
+
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - loongson,ls2k1000-dc
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    bus {
+
+        #address-cells = <3>;
+        #size-cells = <2>;
+        #interrupt-cells = <2>;
+
+        display-controller at 6,0 {
+            compatible = "loongson,ls2k1000-dc";
+            reg = <0x3000 0x0 0x0 0x0 0x0>;
+            interrupts = <28 IRQ_TYPE_LEVEL_LOW>;
+        };
+    };
+
+...
-- 
2.34.1