xref: /linux/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/clock/fsl,sai-clock.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale SAI bitclock-as-a-clock
8
9maintainers:
10  - Michael Walle <michael@walle.cc>
11
12description: |
13  It is possible to use the BCLK pin of a SAI module as a generic clock
14  output. Some SoC are very constrained in their pin multiplexer
15  configuration. Eg. pins can only be changed groups. For example, on the
16  LS1028A SoC you can only enable SAIs in pairs. If you use only one SAI,
17  the second pins are wasted. Using this binding it is possible to use the
18  clock of the second SAI as a MCLK clock for an audio codec, for example.
19
20  This is a composite of a gated clock and a divider clock.
21
22properties:
23  compatible:
24    const: fsl,vf610-sai-clock
25
26  reg:
27    maxItems: 1
28
29  clocks:
30    maxItems: 1
31
32  '#clock-cells':
33    const: 0
34
35required:
36  - compatible
37  - reg
38  - clocks
39  - '#clock-cells'
40
41additionalProperties: false
42
43examples:
44  - |
45    soc {
46        #address-cells = <2>;
47        #size-cells = <2>;
48
49        mclk: clock-mclk@f130080 {
50            compatible = "fsl,vf610-sai-clock";
51            reg = <0x0 0xf130080 0x0 0x80>;
52            #clock-cells = <0>;
53            clocks = <&parentclk>;
54        };
55    };
56