xref: /freebsd/sys/contrib/device-tree/Bindings/clock/rockchip,rk3188-cru.yaml (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/rockchip,rk3188-cru.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Rockchip RK3188/RK3066 Clock and Reset Unit (CRU)
8
9maintainers:
10  - Elaine Zhang <zhangqing@rock-chips.com>
11  - Heiko Stuebner <heiko@sntech.de>
12
13description: |
14  The RK3188/RK3066 clock controller generates and supplies clocks to various
15  controllers within the SoC and also implements a reset controller for SoC
16  peripherals.
17  Each clock is assigned an identifier and client nodes can use this identifier
18  to specify the clock which they consume. All available clocks are defined as
19  preprocessor macros in the dt-bindings/clock/rk3188-cru.h and
20  dt-bindings/clock/rk3066-cru.h headers and can be used in device tree sources.
21  Similar macros exist for the reset sources in these files.
22  There are several clocks that are generated outside the SoC. It is expected
23  that they are defined using standard clock bindings with following
24  clock-output-names:
25    - "xin24m"    - crystal input                 - required
26    - "xin32k"    - RTC clock                     - optional
27    - "xin27m"    - 27mhz crystal input on RK3066 - optional
28    - "ext_hsadc" - external HSADC clock          - optional
29    - "ext_cif0"  - external camera clock         - optional
30    - "ext_rmii"  - external RMII clock           - optional
31    - "ext_jtag"  - external JTAG clock           - optional
32
33properties:
34  compatible:
35    enum:
36      - rockchip,rk3066a-cru
37      - rockchip,rk3188-cru
38      - rockchip,rk3188a-cru
39
40  reg:
41    maxItems: 1
42
43  "#clock-cells":
44    const: 1
45
46  "#reset-cells":
47    const: 1
48
49  clocks:
50    maxItems: 1
51
52  clock-names:
53    const: xin24m
54
55  rockchip,grf:
56    $ref: /schemas/types.yaml#/definitions/phandle
57    description:
58      Phandle to the syscon managing the "general register files" (GRF),
59      if missing pll rates are not changeable, due to the missing pll
60      lock status.
61
62required:
63  - compatible
64  - reg
65  - "#clock-cells"
66  - "#reset-cells"
67
68additionalProperties: false
69
70examples:
71  - |
72    cru: clock-controller@20000000 {
73      compatible = "rockchip,rk3188-cru";
74      reg = <0x20000000 0x1000>;
75      rockchip,grf = <&grf>;
76      #clock-cells = <1>;
77      #reset-cells = <1>;
78    };
79