1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/sound/maxim,max98504.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Maxim Integrated MAX98504 class D mono speaker amplifier
8
9 maintainers:
10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
11
12 description:
13 Maxim Integrated MAX98504 speaker amplifier supports I2C control interface
14 with an IRQ output signal, PCM and PDM digital audio interface (DAI) and a
15 differential analog input.
16
17 properties:
18 compatible:
19 const: maxim,max98504
20
21 reg:
22 maxItems: 1
23
24 interrupts:
25 maxItems: 1
26
27 DIOVDD-supply: true
28 DVDD-supply: true
29 PVDD-supply: true
30
31 maxim,brownout-threshold:
32 $ref: /schemas/types.yaml#/definitions/uint32
33 maximum: 21
34 default: 0
35 description:
36 PVDD brownout threshold, where values correspond to 2.6V, 2.65V...3.65V
37 voltage range. Property also enables the PVDD brownout protection.
38
39 maxim,brownout-attenuation:
40 $ref: /schemas/types.yaml#/definitions/uint32
41 maximum: 6
42 default: 0
43 description:
44 Brownout attenuation to the speaker gain applied during the "attack hold"
45 and "timed hold" phase, the value must be from 0...6 (dB) range.
46
47 maxim,brownout-attack-hold-ms:
48 maximum: 255
49 default: 0
50 description:
51 Brownout attack hold phase time in ms, VBATBROWN_ATTK_HOLD, register 0x0018.
52
53 maxim,brownout-timed-hold-ms:
54 maximum: 255
55 default: 0
56 description:
57 Brownout timed hold phase time in ms, VBATBROWN_TIME_HOLD, register 0x0019.
58
59 maxim,brownout-release-rate-ms:
60 maximum: 255
61 default: 0
62 description:
63 Brownout release phase step time in ms, VBATBROWN_RELEASE, register 0x001A.
64
65 required:
66 - compatible
67 - reg
68
69 additionalProperties: false
70
71 examples:
72 - |
73 #include <dt-bindings/gpio/gpio.h>
74
75 i2c {
76 #address-cells = <1>;
77 #size-cells = <0>;
78
79 amplifier@31 {
80 compatible = "maxim,max98504";
81 reg = <0x31>;
82
83 DIOVDD-supply = <&ldo3_reg>;
84 DVDD-supply = <&ldo3_reg>;
85 };
86 };
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