1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/clock/renesas,9series.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Renesas 9-series I2C PCIe clock generators
8
9 description: |
10 The Renesas 9-series are I2C PCIe clock generators providing
11 from 1 to 20 output clocks.
12
13 When referencing the provided clock in the DT using phandle
14 and clock specifier, the following mapping applies:
15
16 - 9FGV0241:
17 0 -- DIF0
18 1 -- DIF1
19 - 9FGV0441:
20 0 -- DIF0
21 1 -- DIF1
22 2 -- DIF2
23 3 -- DIF3
24 - 9FGV0841:
25 0 -- DIF0
26 1 -- DIF1
27 2 -- DIF2
28 3 -- DIF3
29 4 -- DIF4
30 5 -- DIF5
31 6 -- DIF6
32 7 -- DIF7
33
34 maintainers:
35 - Marek Vasut <marex@denx.de>
36
37 properties:
38 compatible:
39 enum:
40 - renesas,9fgv0241
41 - renesas,9fgv0441
42 - renesas,9fgv0841
43
44 reg:
45 description: I2C device address
46 enum: [ 0x68, 0x6a ]
47
48 '#clock-cells':
49 const: 1
50
51 clocks:
52 items:
53 - description: XTal input clock
54
55 renesas,out-amplitude-microvolt:
56 enum: [ 600000, 700000, 800000, 900000 ]
57 description: Output clock signal amplitude
58
59 renesas,out-spread-spectrum:
60 $ref: /schemas/types.yaml#/definitions/uint32
61 enum: [ 100000, 99750, 99500 ]
62 description: Output clock down spread in pcm (1/1000 of percent)
63
64 patternProperties:
65 "^DIF[0-19]$":
66 type: object
67 description:
68 Description of one of the outputs (DIF0..DIF19).
69
70 properties:
71 renesas,slew-rate:
72 $ref: /schemas/types.yaml#/definitions/uint32
73 enum: [ 2000000, 3000000 ]
74 description: Output clock slew rate select in V/ns
75
76 additionalProperties: false
77
78 required:
79 - compatible
80 - reg
81 - clocks
82 - '#clock-cells'
83
84 additionalProperties: false
85
86 examples:
87 - |
88 /* 25MHz reference crystal */
89 ref25: ref25m {
90 compatible = "fixed-clock";
91 #clock-cells = <0>;
92 clock-frequency = <25000000>;
93 };
94
95 i2c@0 {
96 reg = <0x0 0x100>;
97 #address-cells = <1>;
98 #size-cells = <0>;
99
100 rs9: clock-generator@6a {
101 compatible = "renesas,9fgv0241";
102 reg = <0x6a>;
103 #clock-cells = <1>;
104
105 clocks = <&ref25m>;
106
107 DIF0 {
108 renesas,slew-rate = <3000000>;
109 };
110 };
111 };
112
113 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.