[PATCH V2 1/3] dt-bindings: clock: Add Loongson-1 clock

[Keguang Zhang <keguang.zhang@gmail.com>]

Add devicetree binding document and related header file
for the Loongson-1 clock.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
V1 -> V2: Change to one clock controller
          Add clock-related dt-binding header file
          Fix the warning of dt_binding_check
---
 .../bindings/clock/loongson,ls1x-clk.yaml     | 49 +++++++++++++++++++
 include/dt-bindings/clock/loongson,ls1x-clk.h | 19 +++++++
 2 files changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml
 create mode 100644 include/dt-bindings/clock/loongson,ls1x-clk.h

diff --git a/Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml b/Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml
new file mode 100644
index 000000000000..a911762dd01a
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/loongson,ls1x-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson-1 Clock Controller
+
+maintainers:
+  - Keguang Zhang <keguang.zhang@gmail.com>
+
+properties:
+  compatible:
+    enum:
+      - loongson,ls1b-clk
+      - loongson,ls1c-clk
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: xtal
+
+  "#clock-cells":
+    const: 1
+
+required:
+  - "#clock-cells"
+  - compatible
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    clkc: clock-controller@1fe78030 {
+        compatible = "loongson,ls1b-clk";
+        reg = <0x1fe78030 0x8>;
+
+        clocks = <&xtal>;
+        clock-names = "xtal";
+        #clock-cells = <1>;
+    };
+
+...
diff --git a/include/dt-bindings/clock/loongson,ls1x-clk.h b/include/dt-bindings/clock/loongson,ls1x-clk.h
new file mode 100644
index 000000000000..579552c5f14b
--- /dev/null
+++ b/include/dt-bindings/clock/loongson,ls1x-clk.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson-1 clock tree IDs
+ *
+ * Copyright (C) 2023 Keguang Zhang <keguang.zhang@gmail.com>
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_LS1X_CLK_H__
+#define __DT_BINDINGS_CLOCK_LS1X_CLK_H__
+
+#define LS1X_CLKID_PLL	0
+#define LS1X_CLKID_CPU	1
+#define LS1X_CLKID_DC	2
+#define LS1X_CLKID_AHB	3
+#define LS1X_CLKID_APB	4
+
+#define CLK_NR_CLKS	(LS1X_CLKID_APB + 1)
+
+#endif /* __DT_BINDINGS_CLOCK_LS1X_CLK_H__ */
-- 
2.34.1