xref: /linux/Documentation/devicetree/bindings/sound/rockchip,i2s-tdm.yaml (revision a4eb44a6435d6d8f9e642407a4a06f65eb90ca04) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/rockchip,i2s-tdm.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Rockchip I2S/TDM Controller
8
9description:
10  The Rockchip I2S/TDM Controller is a Time Division Multiplexed
11  audio interface found in various Rockchip SoCs, allowing up
12  to 8 channels of audio over a serial interface.
13
14maintainers:
15  - Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
16
17properties:
18  compatible:
19    enum:
20      - rockchip,px30-i2s-tdm
21      - rockchip,rk1808-i2s-tdm
22      - rockchip,rk3308-i2s-tdm
23      - rockchip,rk3568-i2s-tdm
24      - rockchip,rv1126-i2s-tdm
25
26  reg:
27    maxItems: 1
28
29  interrupts:
30    maxItems: 1
31
32  dmas:
33    minItems: 1
34    maxItems: 2
35
36  dma-names:
37    minItems: 1
38    maxItems: 2
39    items:
40      enum:
41        - rx
42        - tx
43
44  clocks:
45    minItems: 3
46    items:
47      - description: clock for TX
48      - description: clock for RX
49      - description: AHB clock driving the interface
50      - description:
51          Parent clock for mclk_tx (only required when using mclk-calibrate)
52      - description:
53          Parent clock for mclk_rx (only required when using mclk-calibrate)
54      - description:
55          Clock for sample rates that are an integer multiple of 8000
56          (only required when using mclk-calibrate)
57      - description:
58          Clock for sample rates that are an integer multiple of 11025
59          (only required when using mclk-calibrate)
60
61  clock-names:
62    minItems: 3
63    items:
64      - const: mclk_tx
65      - const: mclk_rx
66      - const: hclk
67      - const: mclk_tx_src
68      - const: mclk_rx_src
69      - const: mclk_root0
70      - const: mclk_root1
71
72  resets:
73    minItems: 1
74    maxItems: 2
75    description: resets for the tx and rx directions
76
77  reset-names:
78    minItems: 1
79    maxItems: 2
80    items:
81      enum:
82        - tx-m
83        - rx-m
84
85  rockchip,grf:
86    $ref: /schemas/types.yaml#/definitions/phandle
87    description:
88      The phandle of the syscon node for the GRF register.
89
90  rockchip,trcm-sync-tx-only:
91    type: boolean
92    description: Use TX BCLK/LRCK for both TX and RX.
93
94  rockchip,trcm-sync-rx-only:
95    type: boolean
96    description: Use RX BCLK/LRCK for both TX and RX.
97
98  "#sound-dai-cells":
99    const: 0
100
101  rockchip,i2s-rx-route:
102    $ref: /schemas/types.yaml#/definitions/uint32-array
103    description:
104      Defines the mapping of I2S RX sdis to I2S data bus lines.
105      By default, they are mapped one-to-one.
106      rockchip,i2s-rx-route = <3> would mean sdi3 is receiving from data0.
107    maxItems: 4
108    items:
109      enum: [0, 1, 2, 3]
110
111  rockchip,i2s-tx-route:
112    $ref: /schemas/types.yaml#/definitions/uint32-array
113    description:
114      Defines the mapping of I2S TX sdos to I2S data bus lines.
115      By default, they are mapped one-to-one.
116      rockchip,i2s-tx-route = <3> would mean sdo3 is sending to data0.
117    maxItems: 4
118    items:
119      enum: [0, 1, 2, 3]
120
121  rockchip,io-multiplex:
122    description:
123      Specify that the GPIO lines on the I2S bus are multiplexed such that
124      the direction (input/output) needs to be dynamically adjusted.
125    type: boolean
126
127
128required:
129  - compatible
130  - reg
131  - interrupts
132  - dmas
133  - dma-names
134  - clocks
135  - clock-names
136  - resets
137  - reset-names
138  - rockchip,grf
139  - "#sound-dai-cells"
140
141additionalProperties: false
142
143examples:
144  - |
145    #include <dt-bindings/clock/rk3568-cru.h>
146    #include <dt-bindings/interrupt-controller/arm-gic.h>
147    #include <dt-bindings/interrupt-controller/irq.h>
148    #include <dt-bindings/pinctrl/rockchip.h>
149
150    bus {
151        #address-cells = <2>;
152        #size-cells = <2>;
153        i2s@fe410000 {
154            compatible = "rockchip,rk3568-i2s-tdm";
155            reg = <0x0 0xfe410000 0x0 0x1000>;
156            interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>;
157            clocks = <&cru MCLK_I2S1_8CH_TX>, <&cru MCLK_I2S1_8CH_RX>,
158                     <&cru HCLK_I2S1_8CH>;
159            clock-names = "mclk_tx", "mclk_rx", "hclk";
160            dmas = <&dmac1 3>, <&dmac1 2>;
161            dma-names = "rx", "tx";
162            resets = <&cru SRST_M_I2S1_8CH_TX>, <&cru SRST_M_I2S1_8CH_RX>;
163            reset-names = "tx-m", "rx-m";
164            rockchip,trcm-sync-tx-only;
165            rockchip,grf = <&grf>;
166            #sound-dai-cells = <0>;
167            pinctrl-names = "default";
168            pinctrl-0 =
169                <&i2s1m0_sclktx
170                &i2s1m0_sclkrx
171                &i2s1m0_lrcktx
172                &i2s1m0_lrckrx
173                &i2s1m0_sdi0
174                &i2s1m0_sdi1
175                &i2s1m0_sdi2
176                &i2s1m0_sdi3
177                &i2s1m0_sdo0
178                &i2s1m0_sdo1
179                &i2s1m0_sdo2
180                &i2s1m0_sdo3>;
181        };
182    };
183