linux-kernel - [PATCH 1/2] dt-bindings: clock: Add binding for Loongson-1 clock driver

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Date:   Fri, 13 Jan 2023 19:07:37 +0800
From:   Keguang Zhang <keguang.zhang@...il.com>
To:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Keguang Zhang <keguang.zhang@...il.com>
Subject: [PATCH 1/2] dt-bindings: clock: Add binding for Loongson-1 clock driver

Add devicetree binding document for the Loongson-1 clock driver.

Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
---
 .../bindings/clock/loongson,ls1x-clk.yaml     | 81 +++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml

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..4709c6757f1e
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/loongson,ls1x-clk.yaml
@@ -0,0 +1,81 @@
+# 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@...il.com>
+
+properties:
+  "#clock-cells":
+    const: 0
+
+  compatible:
+    enum:
+      - loongson,ls1b-clk-pll
+      - loongson,ls1b-clk-cpu
+      - loongson,ls1b-clk-ahb
+      - loongson,ls1c-clk-pll
+      - loongson,ls1c-clk-cpu
+      - loongson,ls1c-clk-ahb
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - "#clock-cells"
+  - compatible
+  - clocks
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    clocks {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        xtal: xtal {
+            compatible = "fixed-clock";
+            #clock-cells = <0>;
+            clock-frequency = <33000000>;
+        };
+
+        pll: pll@...78030 {
+            compatible = "loongson,ls1b-clk-pll";
+            #clock-cells = <0>;
+            clocks = <&xtal>;
+            reg = <0x1fe78030 0x4>;
+        };
+
+        cpu_clk: cpu_clk@...78034 {
+            compatible = "loongson,ls1b-clk-cpu";
+            #clock-cells = <0>;
+            clocks = <&pll>;
+            reg = <0x1fe78034 0x4>;
+        };
+
+        ahb_clk: ahb_clk@...78034 {
+            compatible = "loongson,ls1b-clk-ahb";
+            #clock-cells = <0>;
+            clocks = <&pll>;
+            reg = <0x1fe78034 0x4>;
+        };
+
+        apb_clk: apb_clk {
+            compatible = "fixed-factor-clock";
+            #clock-cells = <0>;
+            clocks = <&ahb_clk>;
+            clock-div = <2>;
+            clock-mult = <1>;
+        };
+    };
+...
-- 
2.34.1