xref: /linux/Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml (revision 8e1bb4a41aa78d6105e59186af3dcd545fc66e70) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/opp/allwinner,sun50i-h6-operating-points.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Allwinner H6 CPU OPP
8
9maintainers:
10  - Chen-Yu Tsai <wens@csie.org>
11  - Maxime Ripard <mripard@kernel.org>
12
13description: |
14  For some SoCs, the CPU frequency subset and voltage value of each
15  OPP varies based on the silicon variant in use. Allwinner Process
16  Voltage Scaling Tables define the voltage and frequency values based
17  on the speedbin blown in the efuse combination.
18
19allOf:
20  - $ref: opp-v2-base.yaml#
21
22properties:
23  compatible:
24    enum:
25      - allwinner,sun50i-h6-operating-points
26      - allwinner,sun50i-h616-operating-points
27
28  nvmem-cells:
29    description: |
30      A phandle pointing to a nvmem-cells node representing the efuse
31      register that has information about the speedbin that is used
32      to select the right frequency/voltage value pair. Please refer
33      to the nvmem-cells bindings in
34      Documentation/devicetree/bindings/nvmem/nvmem.yaml and also the
35      examples below.
36
37  opp-shared: true
38
39required:
40  - compatible
41  - nvmem-cells
42
43patternProperties:
44  "^opp-[0-9]+$":
45    type: object
46
47    properties:
48      opp-hz: true
49      clock-latency-ns: true
50      opp-microvolt: true
51      opp-supported-hw:
52        maxItems: 1
53        description:
54          A single 32 bit bitmap value, representing compatible HW, one
55          bit per speed bin index.
56
57    patternProperties:
58      "^opp-microvolt-speed[0-9]$": true
59
60    required:
61      - opp-hz
62
63    unevaluatedProperties: false
64
65additionalProperties: false
66
67examples:
68  - |
69    cpu_opp_table: opp-table {
70        compatible = "allwinner,sun50i-h6-operating-points";
71        nvmem-cells = <&speedbin_efuse>;
72        opp-shared;
73
74        opp-480000000 {
75            clock-latency-ns = <244144>; /* 8 32k periods */
76            opp-hz = /bits/ 64 <480000000>;
77
78            opp-microvolt-speed0 = <880000>;
79            opp-microvolt-speed1 = <820000>;
80            opp-microvolt-speed2 = <800000>;
81        };
82
83        opp-1080000000 {
84            clock-latency-ns = <244144>; /* 8 32k periods */
85            opp-hz = /bits/ 64 <1080000000>;
86
87            opp-microvolt-speed0 = <1060000>;
88            opp-microvolt-speed1 = <880000>;
89            opp-microvolt-speed2 = <840000>;
90        };
91
92        opp-1488000000 {
93            clock-latency-ns = <244144>; /* 8 32k periods */
94            opp-hz = /bits/ 64 <1488000000>;
95
96            opp-microvolt-speed0 = <1160000>;
97            opp-microvolt-speed1 = <1000000>;
98            opp-microvolt-speed2 = <960000>;
99        };
100    };
101
102  - |
103    opp-table {
104        compatible = "allwinner,sun50i-h616-operating-points";
105        nvmem-cells = <&speedbin_efuse>;
106        opp-shared;
107
108        opp-480000000 {
109            clock-latency-ns = <244144>; /* 8 32k periods */
110            opp-hz = /bits/ 64 <480000000>;
111
112            opp-microvolt = <900000>;
113            opp-supported-hw = <0x1f>;
114        };
115
116        opp-792000000 {
117            clock-latency-ns = <244144>; /* 8 32k periods */
118            opp-hz = /bits/ 64 <792000000>;
119
120            opp-microvolt-speed1 = <900000>;
121            opp-microvolt-speed4 = <940000>;
122            opp-supported-hw = <0x12>;
123        };
124
125        opp-1512000000 {
126            clock-latency-ns = <244144>; /* 8 32k periods */
127            opp-hz = /bits/ 64 <1512000000>;
128
129            opp-microvolt = <1100000>;
130            opp-supported-hw = <0x0a>;
131        };
132    };
133
134...
135