Add the documentation to support Amlogic A1 clock driver,
and add A1 clock controller bindings.

Signed-off-by: Jian Hu <redacted>
Signed-off-by: Jianxin Pan <redacted>
---
 .../devicetree/bindings/clock/amlogic,a1-clkc.yaml |  65 +++++++++++++
 include/dt-bindings/clock/a1-clkc.h                | 102 +++++++++++++++++++++
 2 files changed, 167 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/amlogic,a1-clkc.yaml
 create mode 100644 include/dt-bindings/clock/a1-clkc.h

diff --git a/Documentation/devicetree/bindings/clock/amlogic,a1-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,a1-clkc.yaml
new file mode 100644
index 0000000..f012eb2
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/amlogic,a1-clkc.yaml

@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
+ */
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/clock/amlogic,a1-clkc.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson A1 Clock Control Unit Device Tree Bindings
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+  - Jerome Brunet <jbrunet@baylibre.com>
+  - Jian Hu <jian.hu@jian.hu.com>
+
+properties:
+  compatible:
+    - enum:
+        - amlogic,a1-clkc
+
+  reg:
+    minItems: 1
+    maxItems: 3
+    items:
+      - description: peripheral registers
+      - description: cpu registers
+      - description: pll registers
+
+  reg-names:
+    items:
+      - const: peripheral
+      - const: pll
+      - const: cpu
+
+  clocks:
+    maxItems: 1
+    items:
+      - description: Input Oscillator (usually at 24MHz)
+
+  clock-names:
+    maxItems: 1
+    items:
+      - const: xtal
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+  - "#clock-cells"
+
+examples:
+  - |
+    clkc: clock-controller {
+        compatible = "amlogic,a1-clkc";
+        reg = <0x0 0xfe000800 0x0 0x100>,
+              <0x0 0xfe007c00 0x0 0x21c>,
+              <0x0 0xfd000080 0x0 0x20>;
+        reg-names = "peripheral", "pll", "cpu";