1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Rockchip PX30 Clock and Reset Unit (CRU)
maintainers:
- Elaine Zhang <zhangqing@rock-chips.com>
- Heiko Stuebner <heiko@sntech.de>
description: |
The PX30 clock controller generates and supplies clocks to various
controllers within the SoC and also implements a reset controller for SoC
peripherals.
Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. All available clocks are defined as
preprocessor macros in the dt-bindings/clock/px30-cru.h headers and can be
used in device tree sources. Similar macros exist for the reset sources in
these files.
There are several clocks that are generated outside the SoC. It is expected
that they are defined using standard clock bindings with following
clock-output-names:
- "xin24m" - crystal input - required
- "xin32k" - rtc clock - optional
- "i2sx_clkin" - external I2S clock - optional
- "gmac_clkin" - external GMAC clock - optional
properties:
compatible:
enum:
- rockchip,px30-cru
- rockchip,px30-pmucru
reg:
maxItems: 1
"#clock-cells":
const: 1
"#reset-cells":
const: 1
clocks:
minItems: 1
items:
- description: Clock for both PMUCRU and CRU
- description: Clock for CRU (sourced from PMUCRU)
clock-names:
minItems: 1
items:
- const: xin24m
- const: gpll
rockchip,grf:
$ref: /schemas/types.yaml#/definitions/phandle
description:
Phandle to the syscon managing the "general register files" (GRF),
if missing pll rates are not changeable, due to the missing pll
lock status.
required:
- compatible
- reg
- clocks
- clock-names
- "#clock-cells"
- "#reset-cells"
allOf:
- if:
properties:
compatible:
contains:
const: rockchip,px30-cru
then:
properties:
clocks:
minItems: 2
clock-names:
minItems: 2
else:
properties:
clocks:
maxItems: 1
clock-names:
maxItems: 1
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/px30-cru.h>
pmucru: clock-controller@ff2bc000 {
compatible = "rockchip,px30-pmucru";
reg = <0xff2bc000 0x1000>;
clocks = <&xin24m>;
clock-names = "xin24m";
rockchip,grf = <&grf>;
#clock-cells = <1>;
#reset-cells = <1>;
};
cru: clock-controller@ff2b0000 {
compatible = "rockchip,px30-cru";
reg = <0xff2b0000 0x1000>;
clocks = <&xin24m>, <&pmucru PLL_GPLL>;
clock-names = "xin24m", "gpll";
rockchip,grf = <&grf>;
#clock-cells = <1>;
#reset-cells = <1>;
};
|
