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u-boot/doc/device-tree-bindings/sound/max98357a.txt
Simon Glass 54bcca2973 sound: Add an ACPI driver for Maxim MAX98357ac
This chip is used on coral and we need to generate ACPI tables for sound
to make it work. Add a driver that does just this (i.e. at present does
not actually support playing sound).

Signed-off-by: Simon Glass <sjg@chromium.org>
[bmeng: Use the correct acpi_irq_polarity enum number]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2020-07-17 14:32:24 +08:00

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Maxim MAX98357A audio DAC
This node models the Maxim MAX98357A DAC.
Required properties:
- compatible : "maxim,max98357a"
Optional properties:
- sdmode-gpios : GPIO specifier for the chip's SD_MODE pin.
If this option is not specified then driver does not manage
the pin state (e.g. chip is always on).
- sdmode-delay : specify delay time for SD_MODE pin.
If this option is specified, which means it's required i2s clocks
ready before SD_MODE is unmuted in order to avoid the speaker pop noise.
It's observed that 5ms is sufficient.
Example:
max98357a {
compatible = "maxim,max98357a";
sdmode-gpios = <&qcom_pinmux 25 0>;
};