1 # SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Rockchip PX30 Clock and Reset Unit (CRU)
8
9 maintainers:
10 - Elaine Zhang <zhangqing@rock-chips.com>
11 - Heiko Stuebner <heiko@sntech.de>
12
13 description: |
14 The PX30 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/px30-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 - "i2sx_clkin" - external I2S clock - optional
28 - "gmac_clkin" - external GMAC clock - optional
29
30 properties:
31 compatible:
32 enum:
33 - rockchip,px30-cru
34 - rockchip,px30-pmucru
35
36 reg:
37 maxItems: 1
38
39 "#clock-cells":
40 const: 1
41
42 "#reset-cells":
43 const: 1
44
45 clocks:
46 minItems: 1
47 items:
48 - description: Clock for both PMUCRU and CRU
49 - description: Clock for CRU (sourced from PMUCRU)
50
51 clock-names:
52 minItems: 1
53 items:
54 - const: xin24m
55 - const: gpll
56
57 rockchip,grf:
58 $ref: /schemas/types.yaml#/definitions/phandle
59 description:
60 Phandle to the syscon managing the "general register files" (GRF),
61 if missing pll rates are not changeable, due to the missing pll
62 lock status.
63
64 required:
65 - compatible
66 - reg
67 - clocks
68 - clock-names
69 - "#clock-cells"
70 - "#reset-cells"
71
72 allOf:
73 - if:
74 properties:
75 compatible:
76 contains:
77 const: rockchip,px30-cru
78
79 then:
80 properties:
81 clocks:
82 minItems: 2
83
84 clock-names:
85 minItems: 2
86
87 else:
88 properties:
89 clocks:
90 maxItems: 1
91
92 clock-names:
93 maxItems: 1
94
95 additionalProperties: false
96
97 examples:
98 - |
99 #include <dt-bindings/clock/px30-cru.h>
100
101 pmucru: clock-controller@ff2bc000 {
102 compatible = "rockchip,px30-pmucru";
103 reg = <0xff2bc000 0x1000>;
104 clocks = <&xin24m>;
105 clock-names = "xin24m";
106 rockchip,grf = <&grf>;
107 #clock-cells = <1>;
108 #reset-cells = <1>;
109 };
110
111 cru: clock-controller@ff2b0000 {
112 compatible = "rockchip,px30-cru";
113 reg = <0xff2b0000 0x1000>;
114 clocks = <&xin24m>, <&pmucru PLL_GPLL>;
115 clock-names = "xin24m", "gpll";
116 rockchip,grf = <&grf>;
117 #clock-cells = <1>;
118 #reset-cells = <1>;
119 };
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