xref: /linux/Documentation/devicetree/bindings/sound/samsung-i2s.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/samsung-i2s.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung SoC I2S controller
8
9maintainers:
10  - Krzysztof Kozlowski <krzk@kernel.org>
11  - Sylwester Nawrocki <s.nawrocki@samsung.com>
12
13allOf:
14  - $ref: dai-common.yaml#
15
16properties:
17  compatible:
18    description: |
19      samsung,s3c6410-i2s: for 8/16/24bit stereo I2S.
20
21      samsung,s5pv210-i2s: for 8/16/24bit multichannel (5.1) I2S with
22      secondary FIFO, s/w reset control and internal mux for root clock
23      source.
24
25      samsung,exynos5420-i2s: for 8/16/24bit multichannel (5.1) I2S for
26      playback, stereo channel capture, secondary FIFO using internal
27      or external DMA, s/w reset control, internal mux for root clock
28      source and 7.1 channel TDM support for playback; TDM (Time division
29      multiplexing) is to allow transfer of multiple channel audio data on
30      single data line.
31
32      samsung,exynos7-i2s: with all the available features of Exynos5 I2S.
33      Exynos7 I2S has 7.1 channel TDM support for capture, secondary FIFO
34      with only external DMA and more number of root clock sampling
35      frequencies.
36
37      samsung,exynos7-i2s1: I2S1 on previous samsung platforms supports
38      stereo channels. Exynos7 I2S1 upgraded to 5.1 multichannel with
39      slightly modified bit offsets.
40
41      tesla,fsd-i2s: for 8/16/24bit stereo channel I2S for playback and
42      capture, secondary FIFO using external DMA, s/w reset control,
43      internal mux for root clock source with all root clock sampling
44      frequencies supported by Exynos7 I2S and 7.1 channel TDM support
45      for playback and capture TDM (Time division multiplexing) to allow
46      transfer of multiple channel audio data on single data line.
47    oneOf:
48      - enum:
49          - samsung,s3c6410-i2s
50          - samsung,s5pv210-i2s
51          - samsung,exynos5420-i2s
52          - samsung,exynos7-i2s
53          - samsung,exynos7-i2s1
54          - tesla,fsd-i2s
55      - items:
56          - enum:
57              - samsung,exynos5433-i2s
58          - const: samsung,exynos7-i2s
59
60  '#address-cells':
61    const: 1
62
63  '#size-cells':
64    const: 0
65
66  reg:
67    maxItems: 1
68
69  dmas:
70    minItems: 2
71    maxItems: 3
72
73  dma-names:
74    oneOf:
75      - items:
76          - const: tx
77          - const: rx
78      - items:
79          - const: tx
80          - const: rx
81          - const: tx-sec
82
83  clocks:
84    minItems: 1
85    maxItems: 3
86
87  clock-names:
88    oneOf:
89      - items:
90          - const: iis
91      - items: # for I2S0
92          - const: iis
93          - const: i2s_opclk0
94          - const: i2s_opclk1
95      - items: # for I2S1 and I2S2
96          - const: iis
97          - const: i2s_opclk0
98    description: |
99      "iis" is the I2S bus clock and i2s_opclk0, i2s_opclk1 are sources
100      of the root clock. I2S0 has internal mux to select the source
101      of root clock and I2S1 and I2S2 doesn't have any such mux.
102
103  "#clock-cells":
104    const: 1
105
106  clock-output-names:
107    deprecated: true
108    oneOf:
109      - items: # for I2S0
110          - const: i2s_cdclk0
111      - items: # for I2S1
112          - const: i2s_cdclk1
113      - items: # for I2S2
114          - const: i2s_cdclk2
115    description: Names of the CDCLK I2S output clocks.
116
117  interrupts:
118    maxItems: 1
119
120  samsung,idma-addr:
121    $ref: /schemas/types.yaml#/definitions/uint32
122    description: |
123      Internal DMA register base address of the audio
124      subsystem (used in secondary sound source).
125
126  power-domains:
127    maxItems: 1
128
129  "#sound-dai-cells":
130    const: 1
131
132required:
133  - compatible
134  - reg
135  - dmas
136  - dma-names
137  - clocks
138  - clock-names
139
140unevaluatedProperties: false
141
142examples:
143  - |
144    #include <dt-bindings/clock/exynos-audss-clk.h>
145
146    i2s0: i2s@3830000 {
147        compatible = "samsung,s5pv210-i2s";
148        reg = <0x03830000 0x100>;
149        dmas = <&pdma0 10>,
150                <&pdma0 9>,
151                <&pdma0 8>;
152        dma-names = "tx", "rx", "tx-sec";
153        clocks = <&clock_audss EXYNOS_I2S_BUS>,
154                <&clock_audss EXYNOS_I2S_BUS>,
155                <&clock_audss EXYNOS_SCLK_I2S>;
156        clock-names = "iis", "i2s_opclk0", "i2s_opclk1";
157        #clock-cells = <1>;
158        samsung,idma-addr = <0x03000000>;
159        pinctrl-names = "default";
160        pinctrl-0 = <&i2s0_bus>;
161        #sound-dai-cells = <1>;
162    };
163