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
7 title: Rockchip RK3399 Clock and Reset Unit
8
9 maintainers:
10 - Elaine Zhang <zhangqing@rock-chips.com>
11 - Heiko Stuebner <heiko@sntech.de>
12
13 description: |
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
33 properties:
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
61 required:
62 - compatible
63 - reg
64 - "#clock-cells"
65 - "#reset-cells"
66
67 additionalProperties: false
68
69 examples:
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 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.