dt-bindings: Add devicetree bindings

Add snapshot of device tree bindings from keystone common kernel, branch
"android-mainline-keystone-qcom-release" at c4c12103f9c0 ("Snap for 9228065
from e32903b9a63bb558df8b803b076619c53c16baad to
android-mainline-keystone-qcom-release").

Change-Id: I7682079615cbd9f29340a5c1f2a1d84ec441a1f1
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/bus/allwinner,sun50i-a64-de2.yaml

@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/allwinner,sun50i-a64-de2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A64 Display Engine Bus
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+  - Maxime Ripard <mripard@kernel.org>
+
+properties:
+  $nodename:
+    pattern: "^bus(@[0-9a-f]+)?$"
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  compatible:
+    oneOf:
+      - const: allwinner,sun50i-a64-de2
+      - items:
+          - const: allwinner,sun50i-h6-de3
+          - const: allwinner,sun50i-a64-de2
+
+  reg:
+    maxItems: 1
+
+  allwinner,sram:
+    description:
+      The SRAM that needs to be claimed to access the display engine
+      bus.
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to SRAM
+          - description: register value for device
+
+  ranges: true
+
+patternProperties:
+  # All other properties should be child nodes with unit-address and 'reg'
+  "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-fA-F]+$":
+    type: object
+    properties:
+      reg:
+        maxItems: 1
+
+    required:
+      - reg
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+  - allwinner,sram
+
+additionalProperties: false
+
+examples:
+  - |
+    bus@1000000 {
+        compatible = "allwinner,sun50i-a64-de2";
+        reg = <0x1000000 0x400000>;
+        allwinner,sram = <&de2_sram 1>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges = <0 0x1000000 0x400000>;
+
+        display_clocks: clock@0 {
+            compatible = "allwinner,sun50i-a64-de2-clk";
+            reg = <0x0 0x100000>;
+            clocks = <&ccu 52>, <&ccu 99>;
+            clock-names = "bus", "mod";
+            resets = <&ccu 30>;
+            #clock-cells = <1>;
+            #reset-cells = <1>;
+        };
+    };
+
+...