1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/arm/bcm/raspberrypi,bcm2835-firmware.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Raspberry Pi VideoCore firmware driver
8
9 maintainers:
10 - Eric Anholt <eric@anholt.net>
11 - Stefan Wahren <wahrenst@gmx.net>
12
13 select:
14 properties:
15 compatible:
16 contains:
17 const: raspberrypi,bcm2835-firmware
18
19 required:
20 - compatible
21
22 properties:
23 compatible:
24 items:
25 - const: raspberrypi,bcm2835-firmware
26 - const: simple-mfd
27
28 mboxes:
29 maxItems: 1
30
31 clocks:
32 type: object
33 additionalProperties: false
34
35 properties:
36 compatible:
37 const: raspberrypi,firmware-clocks
38
39 "#clock-cells":
40 const: 1
41 description: >
42 The argument is the ID of the clocks contained by the
43 firmware messages.
44
45 required:
46 - compatible
47 - "#clock-cells"
48
49 gpio:
50 type: object
51 additionalProperties: false
52
53 properties:
54 compatible:
55 const: raspberrypi,firmware-gpio
56
57 gpio-controller: true
58
59 "#gpio-cells":
60 const: 2
61 description:
62 The first cell is the pin number, and the second cell is used to
63 specify the gpio polarity (GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW).
64
65 gpio-line-names:
66 minItems: 8
67
68 required:
69 - compatible
70 - gpio-controller
71 - "#gpio-cells"
72
73 reset:
74 type: object
75 additionalProperties: false
76
77 properties:
78 compatible:
79 const: raspberrypi,firmware-reset
80
81 "#reset-cells":
82 const: 1
83 description: >
84 The argument is the ID of the firmware reset line to affect.
85
86 required:
87 - compatible
88 - "#reset-cells"
89
90 pwm:
91 type: object
92 additionalProperties: false
93
94 properties:
95 compatible:
96 const: raspberrypi,firmware-poe-pwm
97
98 "#pwm-cells":
99 # See pwm.yaml in this directory for a description of the cells format.
100 const: 2
101
102 required:
103 - compatible
104 - "#pwm-cells"
105
106 required:
107 - compatible
108 - mboxes
109
110 additionalProperties: false
111
112 examples:
113 - |
114 firmware {
115 compatible = "raspberrypi,bcm2835-firmware", "simple-mfd";
116 mboxes = <&mailbox>;
117
118 firmware_clocks: clocks {
119 compatible = "raspberrypi,firmware-clocks";
120 #clock-cells = <1>;
121 };
122
123 expgpio: gpio {
124 compatible = "raspberrypi,firmware-gpio";
125 gpio-controller;
126 #gpio-cells = <2>;
127 };
128
129 reset: reset {
130 compatible = "raspberrypi,firmware-reset";
131 #reset-cells = <1>;
132 };
133
134 pwm: pwm {
135 compatible = "raspberrypi,firmware-poe-pwm";
136 #pwm-cells = <2>;
137 };
138 };
139 ...
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