xref: /linux/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml (revision 8dd765a5d769c521d73931850d1c8708fbc490cb) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/nuvoton,nau8821.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NAU88L21 audio codec
8
9maintainers:
10  - Seven Lee <wtli@nuvoton.com>
11
12allOf:
13  - $ref: dai-common.yaml#
14
15properties:
16  compatible:
17    const: nuvoton,nau8821
18
19  reg:
20    maxItems: 1
21
22  interrupts:
23    maxItems: 1
24
25  nuvoton,jkdet-enable:
26    description: Enable jack detection via JKDET pin.
27    type: boolean
28
29  nuvoton,jkdet-pull-enable:
30    description: Enable JKDET pin pull. If set - pin pull enabled,
31      otherwise pin in high impedance state.
32    type: boolean
33
34  nuvoton,jkdet-pull-up:
35    description: Pull-up JKDET pin. If set then JKDET pin is pull up,
36      otherwise pull down.
37    type: boolean
38
39  nuvoton,key-enable:
40    description: handles key press detection.
41    type: boolean
42
43  nuvoton,jkdet-polarity:
44    description: JKDET pin polarity.
45    $ref: /schemas/types.yaml#/definitions/uint32
46    enum:
47      - 0 # active high
48      - 1 # active low
49    default: 1
50
51  nuvoton,micbias-voltage:
52    description: MICBIAS output level select.
53    $ref: /schemas/types.yaml#/definitions/uint32
54    enum:
55      - 0 # VDDA
56      - 1 # VDDA * 1
57      - 2 # VDDA * 1.1
58      - 3 # VDDA * 1.2
59      - 4 # VDDA * 1.3
60      - 5 # VDDA * 1.4
61      - 6 # VDDA * 1.53
62      - 7 # VDDA * 1.53
63    default: 6
64
65  nuvoton,vref-impedance:
66    description: VMID Tie-off impedance select.
67    $ref: /schemas/types.yaml#/definitions/uint32
68    enum:
69      - 0 # open
70      - 1 # 25KOhms
71      - 2 # 125KOhms
72      - 3 # 2.5KOhms
73    default: 2
74
75  nuvoton,jack-insert-debounce:
76    description: number from 0 to 7 that sets debounce time to 2^(n+2)ms.
77    $ref: /schemas/types.yaml#/definitions/uint32
78    maximum: 7
79    default: 7
80
81  nuvoton,jack-eject-debounce:
82    description: number from 0 to 7 that sets debounce time to 2^(n+2)ms.
83    $ref: /schemas/types.yaml#/definitions/uint32
84    maximum: 7
85    default: 0
86
87  nuvoton,dmic-clk-threshold:
88    description: DMIC clock speed expected value. Unit is Hz.
89    $ref: /schemas/types.yaml#/definitions/uint32
90    default: 3072000
91
92  nuvoton,left-input-single-end:
93    description: Enable left input with single-ended settings if set.
94        For the headset mic application, the single-ended control is
95        just limited to the left adc for design demand.
96    type: boolean
97
98  '#sound-dai-cells':
99    const: 0
100
101required:
102  - compatible
103  - reg
104
105unevaluatedProperties: false
106
107examples:
108  - |
109    #include <dt-bindings/gpio/gpio.h>
110    #include <dt-bindings/interrupt-controller/irq.h>
111    i2c {
112        #address-cells = <1>;
113        #size-cells = <0>;
114        codec@1b {
115            compatible = "nuvoton,nau8821";
116            reg = <0x1b>;
117            interrupt-parent = <&gpio>;
118            interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
119            nuvoton,jkdet-enable;
120            nuvoton,jkdet-pull-enable;
121            nuvoton,jkdet-pull-up;
122            nuvoton,key-enable;
123            nuvoton,left-input-single-end;
124            nuvoton,jkdet-polarity = <GPIO_ACTIVE_LOW>;
125            nuvoton,micbias-voltage = <6>;
126            nuvoton,vref-impedance = <2>;
127            nuvoton,jack-insert-debounce = <7>;
128            nuvoton,jack-eject-debounce = <0>;
129            nuvoton,dmic-clk-threshold = <3072000>;
130            #sound-dai-cells = <0>;
131        };
132    };
133