[PATCH 3/8] dt-bindings: clock: Add rockchip,rk3528-cru

[Yao Zi <ziyao@disroot.org>]

Document Rockchip RK3528 clock and reset unit.

Signed-off-by: Yao Zi <ziyao@disroot.org>
---
 .../bindings/clock/rockchip,rk3528-cru.yaml   | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3528-cru.yaml

diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3528-cru.yaml b/Documentation/devicetree/bindings/clock/rockchip,rk3528-cru.yaml
new file mode 100644
index 000000000000..ae51dfde5bb9
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/rockchip,rk3528-cru.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/rockchip,rk3528-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3528 Clock and Reset Controller
+
+maintainers:
+  - Yao Zi <ziyao@disroot.org>
+
+description: |
+  The RK3528 clock controller generates the clock and also implements a reset
+  controller for SoC peripherals. For example, it provides SCLK_UART0 and
+  PCLK_UART0 as well as SRST_P_UART0 and SRST_S_UART0 for the first UART
+  module.
+  Each clock is assigned an identifier, consumer nodes can use it to specify
+  the clock. All available clock and reset IDs are defined in dt-binding
+  headers.
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3528-cru
+
+  reg:
+    maxItems: 1
+
+  assigned-clocks: true
+
+  assigned-clock-rates: true
+
+  clocks:
+    minItems: 2
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: xin24m
+      - const: phy_50m_out
+
+  "#clock-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    cru: clock-controller@ff4a0000 {
+        compatible = "rockchip,rk3528-cru";
+        reg = <0xff4a0000 0x30000>;
+        #clock-cells = <1>;
+        #reset-cells = <1>;
+    };
-- 
2.46.0