dt-bindings: clock, reset: Add support for rk3576

Add clock and reset ID defines for rk3576.

Compared to the downstream bindings written by Elaine, this uses
continous gapless IDs starting at 0. Thus all numbers are
different between downstream and upstream, but names are kept
exactly the same.

Also add documentation for the rk3576 CRU core.

Signed-off-by: Elaine Zhang <[email protected]>
Signed-off-by: Sugar Zhang <[email protected]>
Signed-off-by: Detlev Casanova <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Link: https://lore.kernel.org/r/0102019199a76766-f3a2b53f-d063-458b-b0d1-dfbc2ea1893c-000000@eu-west-1.amazonses.com
Signed-off-by: Heiko Stuebner <[email protected]>

Author: cazou

Documentation/devicetree/bindings/clock/rockchip,rk3576-cru.yaml

@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/rockchip,rk3576-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip rk3576 Family Clock and Reset Control Module
+
+maintainers:
+  - Elaine Zhang <[email protected]>
+  - Heiko Stuebner <[email protected]>
+  - Detlev Casanova <[email protected]>
+
+description:
+  The RK3576 clock controller generates the clock and also implements a reset
+  controller for SoC peripherals. For example it provides SCLK_UART2 and
+  PCLK_UART2, as well as SRST_P_UART2 and SRST_S_UART2 for the second UART
+  module.
+
+properties:
+  compatible:
+    const: rockchip,rk3576-cru
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 1
+
+  "#reset-cells":
+    const: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: xin24m
+      - const: xin32k
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@27200000 {
+      compatible = "rockchip,rk3576-cru";
+      reg = <0xfd7c0000 0x5c000>;
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+    };