45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
Maxim MAX98504 class D mono speaker amplifier
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This device supports I2C control interface and an IRQ output signal. It features
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a PCM and PDM digital audio interface (DAI) and a differential analog input.
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Required properties:
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- compatible : "maxim,max98504"
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- reg : should contain the I2C slave device address
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- DVDD-supply, DIOVDD-supply, PVDD-supply: power supplies for the device,
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as covered in ../regulator/regulator.txt
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- interrupts : should specify the interrupt line the device is connected to,
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as described in ../interrupt-controller/interrupts.txt
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Optional properties:
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- maxim,brownout-threshold - the PVDD brownout threshold, the value must be
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from 0, 1...21 range, corresponding to 2.6V, 2.65V...3.65V voltage range
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- maxim,brownout-attenuation - the brownout attenuation to the speaker gain
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applied during the "attack hold" and "timed hold" phase, the value must be
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from 0...6 (dB) range
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- maxim,brownout-attack-hold-ms - the brownout attack hold phase time in ms,
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0...255 (VBATBROWN_ATTK_HOLD, register 0x0018)
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- maxim,brownout-timed-hold-ms - the brownout timed hold phase time in ms,
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0...255 (VBATBROWN_TIME_HOLD, register 0x0019)
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- maxim,brownout-release-rate-ms - the brownout release phase step time in ms,
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0...255 (VBATBROWN_RELEASE, register 0x001A)
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The default value when the above properties are not specified is 0,
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the maxim,brownout-threshold property must be specified to actually enable
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the PVDD brownout protection.
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Example:
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max98504@31 {
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compatible = "maxim,max98504";
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reg = <0x31>;
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interrupt-parent = <&gpio_bank_0>;
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interrupts = <2 0>;
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DVDD-supply = <®ulator>;
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DIOVDD-supply = <®ulator>;
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PVDD-supply = <®ulator>;
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};
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