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1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause2%YAML 1.23---4$id: http://devicetree.org/schemas/sound/maxim,max98504.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Maxim Integrated MAX98504 class D mono speaker amplifier8 9maintainers:10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>11 12description:13 Maxim Integrated MAX98504 speaker amplifier supports I2C control interface14 with an IRQ output signal, PCM and PDM digital audio interface (DAI) and a15 differential analog input.16 17properties:18 compatible:19 const: maxim,max9850420 21 reg:22 maxItems: 123 24 interrupts:25 maxItems: 126 27 DIOVDD-supply: true28 DVDD-supply: true29 PVDD-supply: true30 31 maxim,brownout-threshold:32 $ref: /schemas/types.yaml#/definitions/uint3233 maximum: 2134 default: 035 description:36 PVDD brownout threshold, where values correspond to 2.6V, 2.65V...3.65V37 voltage range. Property also enables the PVDD brownout protection.38 39 maxim,brownout-attenuation:40 $ref: /schemas/types.yaml#/definitions/uint3241 maximum: 642 default: 043 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: 25549 default: 050 description:51 Brownout attack hold phase time in ms, VBATBROWN_ATTK_HOLD, register 0x0018.52 53 maxim,brownout-timed-hold-ms:54 maximum: 25555 default: 056 description:57 Brownout timed hold phase time in ms, VBATBROWN_TIME_HOLD, register 0x0019.58 59 maxim,brownout-release-rate-ms:60 maximum: 25561 default: 062 description:63 Brownout release phase step time in ms, VBATBROWN_RELEASE, register 0x001A.64 65required:66 - compatible67 - reg68 69additionalProperties: false70 71examples: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 };87