xref: /linux/Documentation/devicetree/bindings/clock/fixed-mmio-clock.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/fixed-mmio-clock.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Simple memory mapped IO fixed-rate clock sources
8
9description:
10  This binding describes a fixed-rate clock for which the frequency can
11  be read from a single 32-bit memory mapped I/O register.
12
13  It was designed for test systems, like FPGA, not for complete,
14  finished SoCs.
15
16maintainers:
17  - Jan Kotas <jank@cadence.com>
18
19properties:
20  compatible:
21    const: fixed-mmio-clock
22
23  reg:
24    maxItems: 1
25
26  "#clock-cells":
27    const: 0
28
29  clock-output-names:
30    maxItems: 1
31
32required:
33  - compatible
34  - reg
35  - "#clock-cells"
36
37additionalProperties: false
38
39examples:
40  - |
41    sysclock: sysclock@fd020004 {
42      compatible = "fixed-mmio-clock";
43      #clock-cells = <0>;
44      reg = <0xfd020004 0x4>;
45      clock-output-names = "sysclk";
46    };
47...
48