linux-kernel - [PATCH v2 3/3] dt-bindings: clock: add loongson2 clock binding

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Message-Id: <20221019062912.3463-3-zhuyinbo@loongson.cn>
Date:   Wed, 19 Oct 2022 14:29:12 +0800
From:   Yinbo Zhu <zhuyinbo@...ngson.cn>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Jianmin Lv <lvjianmin@...ngson.cn>,
        Yang Li <yang.lee@...ux.alibaba.com>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        Yinbo Zhu <zhuyinbo@...ngson.cn>
Subject: [PATCH v2 3/3] dt-bindings: clock: add loongson2 clock binding

Add the loongson2 clock binding with DT schema format using
json-schema.

Signed-off-by: Yinbo Zhu <zhuyinbo@...ngson.cn>
---
Change in v2:
		1. Drop "Binding" string in the title.
		2. Drop entire allOf and move the contents to top level.
		3. Change string "refclk_100m" to "ref_100m". 

 .../bindings/clock/loongson,ls2k-clk.yaml     | 64 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 65 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml

diff --git a/Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml b/Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml
new file mode 100644
index 000000000000..104e38a618e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/loongson,ls2k-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson2 SoC Clock Control Module
+
+maintainers:
+  - Yinbo Zhu <zhuyinbo@...ngson.cn>
+
+description: |
+  Loongson2 SoC clock control module is an integrated clock controller, which
+  generates and supplies to all modules.
+
+properties:
+  compatible:
+    enum:
+      - loongson,ls2k-clk
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: 100m ref
+
+  clock-names:
+    items:
+      - const: ref_100m
+
+  '#clock-cells':
+    const: 1
+    description:
+      The clock consumer should specify the desired clock by having the clock
+      ID in its "clocks" phandle cell. See include/dt-bindings/clock/loongson,ls2k-clk.h
+      for the full list of loongson2 SoC clock IDs.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    ref_100m: clock-ref-100m {
+        compatible = "fixed-clock";
+        #clock-cells = <0>;
+        clock-frequency = <100000000>;
+        clock-output-names = "ref_100m";
+    };
+
+  - |
+    clk: clock-controller@...00480 {
+        compatible = "loongson,ls2k-clk";
+        reg = <0x1fe00480 0x58>;
+        #clock-cells = <1>;
+        clocks = <&ref_100m>;
+        clock-names = "ref_100m";
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index a4de8f1b81f0..7b7ba73ccb99 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11918,6 +11918,7 @@ LOONGSON2 SOC SERIES CLOCK DRIVER
 M:	Yinbo Zhu <zhuyinbo@...ngson.cn>
 L:	linux-clk@...r.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/clock/loongson,ls2k-clk.yaml
 F:	drivers/clk/clk-loongson2.c
 F:	include/dt-bindings/clock/loongson,ls2k-clk.h
 
-- 
2.31.1