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,imx-asrc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Freescale Asynchronous Sample Rate Converter (ASRC) Controller
8
9 description:
10 The Asynchronous Sample Rate Converter (ASRC) converts the sampling rate of
11 a signal associated with an input clock into a signal associated with a
12 different output clock. The driver currently works as a Front End of DPCM
13 with other Back Ends Audio controller such as ESAI, SSI and SAI. It has
14 three pairs to support three substreams within totally 10 channels.
15
16 maintainers:
17 - Shawn Guo <shawnguo@kernel.org>
18 - Sascha Hauer <s.hauer@pengutronix.de>
19
20 properties:
21 compatible:
22 oneOf:
23 - enum:
24 - fsl,imx35-asrc
25 - fsl,imx53-asrc
26 - fsl,imx8qm-asrc
27 - fsl,imx8qxp-asrc
28 - items:
29 - enum:
30 - fsl,imx6sx-asrc
31 - fsl,imx6ul-asrc
32 - const: fsl,imx53-asrc
33
34 reg:
35 maxItems: 1
36
37 interrupts:
38 maxItems: 1
39
40 dmas:
41 maxItems: 6
42
43 dma-names:
44 items:
45 - const: rxa
46 - const: rxb
47 - const: rxc
48 - const: txa
49 - const: txb
50 - const: txc
51
52 clocks:
53 maxItems: 19
54
55 clock-names:
56 items:
57 - const: mem
58 - const: ipg
59 - const: asrck_0
60 - const: asrck_1
61 - const: asrck_2
62 - const: asrck_3
63 - const: asrck_4
64 - const: asrck_5
65 - const: asrck_6
66 - const: asrck_7
67 - const: asrck_8
68 - const: asrck_9
69 - const: asrck_a
70 - const: asrck_b
71 - const: asrck_c
72 - const: asrck_d
73 - const: asrck_e
74 - const: asrck_f
75 - const: spba
76
77 power-domains:
78 maxItems: 1
79
80 fsl,asrc-rate:
81 $ref: /schemas/types.yaml#/definitions/uint32
82 description: The mutual sample rate used by DPCM Back Ends
83
84 fsl,asrc-width:
85 $ref: /schemas/types.yaml#/definitions/uint32
86 description: The mutual sample width used by DPCM Back Ends
87 enum: [16, 24]
88
89 fsl,asrc-clk-map:
90 $ref: /schemas/types.yaml#/definitions/uint32
91 description:
92 Defines clock map used in driver
93 <0> - select the map for asrc0 in imx8qm/imx8qxp
94 <1> - select the map for asrc1 in imx8qm/imx8qxp
95 enum: [0, 1]
96
97 big-endian:
98 type: boolean
99 description:
100 If this property is absent, the little endian mode will be in use as
101 default. Otherwise, the big endian mode will be in use for all the
102 device registers.
103
104 fsl,asrc-format:
105 $ref: /schemas/types.yaml#/definitions/uint32
106 description:
107 Defines a mutual sample format used by DPCM Back Ends, which can
108 replace the fsl,asrc-width. The value is 2 (S16_LE), or 6 (S24_LE).
109 enum: [2, 6]
110
111 required:
112 - compatible
113 - reg
114 - interrupts
115 - dmas
116 - dma-names
117 - clocks
118 - clock-names
119 - fsl,asrc-rate
120 - fsl,asrc-width
121
122 allOf:
123 - if:
124 properties:
125 compatible:
126 contains:
127 enum:
128 - fsl,imx8qm-asrc
129 - fsl,imx8qxp-asrc
130 then:
131 required:
132 - fsl,asrc-clk-map
133 else:
134 properties:
135 fsl,asrc-clk-map: false
136
137 - if:
138 properties:
139 compatible:
140 contains:
141 enum:
142 - fsl,imx8qm-asrc
143 - fsl,imx8qxp-asrc
144 then:
145 required:
146 - power-domains
147
148 additionalProperties: false
149
150 examples:
151 - |
152 #include <dt-bindings/interrupt-controller/irq.h>
153 #include <dt-bindings/clock/imx6qdl-clock.h>
154 asrc: asrc@2034000 {
155 compatible = "fsl,imx53-asrc";
156 reg = <0x02034000 0x4000>;
157 interrupts = <0 50 IRQ_TYPE_LEVEL_HIGH>;
158 clocks = <&clks IMX6QDL_CLK_ASRC_IPG>,
159 <&clks IMX6QDL_CLK_ASRC_MEM>, <&clks 0>,
160 <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>,
161 <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>,
162 <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>,
163 <&clks IMX6QDL_CLK_ASRC>, <&clks 0>, <&clks 0>,
164 <&clks IMX6QDL_CLK_SPBA>;
165 clock-names = "mem", "ipg", "asrck_0",
166 "asrck_1", "asrck_2", "asrck_3", "asrck_4",
167 "asrck_5", "asrck_6", "asrck_7", "asrck_8",
168 "asrck_9", "asrck_a", "asrck_b", "asrck_c",
169 "asrck_d", "asrck_e", "asrck_f", "spba";
170 dmas = <&sdma 17 23 1>, <&sdma 18 23 1>, <&sdma 19 23 1>,
171 <&sdma 20 23 1>, <&sdma 21 23 1>, <&sdma 22 23 1>;
172 dma-names = "rxa", "rxb", "rxc",
173 "txa", "txb", "txc";
174 fsl,asrc-rate = <48000>;
175 fsl,asrc-width = <16>;
176 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.