linux-kernel - [PATCH v2 1/4] dt-bindings: clock: Add simple-clock-controller

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Date:   Mon, 17 Apr 2023 01:32:57 +0800
From:   David Yang <mmyangfl@...il.com>
To:     linux-clk@...r.kernel.org
Cc:     devicetree@...r.kernel.org, David Yang <mmyangfl@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Subject: [PATCH v2 1/4] dt-bindings: clock: Add simple-clock-controller

Add DT bindings documentation for simple-clock-controller, mutex
controller for clocks.

Signed-off-by: David Yang <mmyangfl@...il.com>
---
 .../clock/simple-clock-controller.yaml        | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/simple-clock-controller.yaml

diff --git a/Documentation/devicetree/bindings/clock/simple-clock-controller.yaml b/Documentation/devicetree/bindings/clock/simple-clock-controller.yaml
new file mode 100644
index 000000000000..17835aeddb1d
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/simple-clock-controller.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/simple-clock-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Simple clock controller
+
+maintainers:
+  - David Yang <mmyangfl@...il.com>
+
+description: |
+  Driver (lock provider) for real clocks.
+
+  Usually one register controls more than one clocks. This controller avoids
+  write conflicts by imposing a write lock, so that two operations on the same
+  register will not happen at the same time.
+
+properties:
+  compatible:
+    items:
+      - oneOf:
+          - const: simple-clock-controller
+          - const: simple-clock-reset-controller
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  '#reset-cells':
+    const: 2
+
+patternProperties:
+  "clock@.*":
+    type: object
+    description: Clock nodes.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@...f000 {
+      compatible = "simple-clock-controller", "syscon", "simple-mfd";
+      reg = <0xffff000 0x1000>;
+    };
-- 
2.39.2