1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/sound/fsl,easrc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: NXP Asynchronous Sample Rate Converter (ASRC) Controller
8
9 maintainers:
10 - Shengjiu Wang <shengjiu.wang@nxp.com>
11
12 properties:
13 $nodename:
14 pattern: "^easrc@.*"
15
16 compatible:
17 oneOf:
18 - enum:
19 - fsl,imx8mn-easrc
20 - items:
21 - enum:
22 - fsl,imx8mp-easrc
23 - const: fsl,imx8mn-easrc
24
25 reg:
26 maxItems: 1
27
28 interrupts:
29 maxItems: 1
30
31 clocks:
32 items:
33 - description: Peripheral clock
34
35 clock-names:
36 items:
37 - const: mem
38
39 dmas:
40 maxItems: 8
41
42 dma-names:
43 items:
44 - const: ctx0_rx
45 - const: ctx0_tx
46 - const: ctx1_rx
47 - const: ctx1_tx
48 - const: ctx2_rx
49 - const: ctx2_tx
50 - const: ctx3_rx
51 - const: ctx3_tx
52
53 firmware-name:
54 items:
55 - const: imx/easrc/easrc-imx8mn.bin
56 description: The coefficient table for the filters
57
58 fsl,asrc-rate:
59 $ref: /schemas/types.yaml#/definitions/uint32
60 minimum: 8000
61 maximum: 192000
62 description: Defines a mutual sample rate used by DPCM Back Ends
63
64 fsl,asrc-format:
65 $ref: /schemas/types.yaml#/definitions/uint32
66 enum: [2, 6, 10, 32, 36]
67 default: 2
68 description:
69 Defines a mutual sample format used by DPCM Back Ends
70
71 required:
72 - compatible
73 - reg
74 - interrupts
75 - clocks
76 - clock-names
77 - dmas
78 - dma-names
79 - firmware-name
80 - fsl,asrc-rate
81 - fsl,asrc-format
82
83 additionalProperties: false
84
85 examples:
86 - |
87 #include <dt-bindings/clock/imx8mn-clock.h>
88
89 easrc: easrc@300c0000 {
90 compatible = "fsl,imx8mn-easrc";
91 reg = <0x300c0000 0x10000>;
92 interrupts = <0x0 122 0x4>;
93 clocks = <&clk IMX8MN_CLK_ASRC_ROOT>;
94 clock-names = "mem";
95 dmas = <&sdma2 16 23 0> , <&sdma2 17 23 0>,
96 <&sdma2 18 23 0> , <&sdma2 19 23 0>,
97 <&sdma2 20 23 0> , <&sdma2 21 23 0>,
98 <&sdma2 22 23 0> , <&sdma2 23 23 0>;
99 dma-names = "ctx0_rx", "ctx0_tx",
100 "ctx1_rx", "ctx1_tx",
101 "ctx2_rx", "ctx2_tx",
102 "ctx3_rx", "ctx3_tx";
103 firmware-name = "imx/easrc/easrc-imx8mn.bin";
104 fsl,asrc-rate = <8000>;
105 fsl,asrc-format = <2>;
106 };
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