xref: /freebsd/sys/contrib/device-tree/Bindings/clock/rockchip,rk3399-cru.yaml (revision 7ef62cebc2f965b0f640263e179276928885e33d) 
1# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/rockchip,rk3399-cru.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Rockchip RK3399 Clock and Reset Unit
8
9maintainers:
10  - Elaine Zhang <zhangqing@rock-chips.com>
11  - Heiko Stuebner <heiko@sntech.de>
12
13description: |
14  The RK3399 clock controller generates and supplies clock 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/rk3399-cru.h headers and can be
20  used in device tree sources. Similar macros exist for the reset sources in
21  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    - "clkin_gmac"       - external GMAC clock                    - optional,
28    - "clkin_i2s"        - external I2S clock                     - optional,
29    - "pclkin_cif"       - external ISP clock                     - optional,
30    - "clk_usbphy0_480m" - output clock of the pll in the usbphy0
31    - "clk_usbphy1_480m" - output clock of the pll in the usbphy1
32
33properties:
34  compatible:
35    enum:
36      - rockchip,rk3399-pmucru
37      - rockchip,rk3399-cru
38
39  reg:
40    maxItems: 1
41
42  "#clock-cells":
43    const: 1
44
45  "#reset-cells":
46    const: 1
47
48  clocks:
49    maxItems: 1
50
51  clock-names:
52    const: xin24m
53
54  rockchip,grf:
55    $ref: /schemas/types.yaml#/definitions/phandle
56    description:
57      Phandle to the syscon managing the "general register files". It is used
58      for GRF muxes, if missing any muxes present in the GRF will not be
59      available.
60
61required:
62  - compatible
63  - reg
64  - "#clock-cells"
65  - "#reset-cells"
66
67additionalProperties: false
68
69examples:
70  - |
71    pmucru: clock-controller@ff750000 {
72      compatible = "rockchip,rk3399-pmucru";
73      reg = <0xff750000 0x1000>;
74      #clock-cells = <1>;
75      #reset-cells = <1>;
76    };
77  - |
78    cru: clock-controller@ff760000 {
79      compatible = "rockchip,rk3399-cru";
80      reg = <0xff760000 0x1000>;
81      #clock-cells = <1>;
82      #reset-cells = <1>;
83    };
84