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author | Simon Glass <sjg@chromium.org> | 2020-07-08 06:32:18 +0300 |
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committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 09:32:24 +0300 |
commit | 54bcca29737f8de2598b4a3f8f503290bd49eec0 (patch) | |
tree | 2e3ea5553cb2702eb628642aff273ae4a8771a76 /doc/device-tree-bindings/sound | |
parent | 0324b7123e223eac7cb4cc20bff639f51a5f4f84 (diff) | |
download | u-boot-54bcca29737f8de2598b4a3f8f503290bd49eec0.tar.xz |
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>
Diffstat (limited to 'doc/device-tree-bindings/sound')
-rw-r--r-- | doc/device-tree-bindings/sound/max98357a.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/sound/max98357a.txt b/doc/device-tree-bindings/sound/max98357a.txt new file mode 100644 index 0000000000..4bce14ce80 --- /dev/null +++ b/doc/device-tree-bindings/sound/max98357a.txt @@ -0,0 +1,22 @@ +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>; +}; |