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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/sound/max98504.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/sound/max98504.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/max98504.txt b/Documentation/devicetree/bindings/sound/max98504.txt new file mode 100644 index 000000000..583ed5fdf --- /dev/null +++ b/Documentation/devicetree/bindings/sound/max98504.txt @@ -0,0 +1,44 @@ +Maxim MAX98504 class D mono speaker amplifier + +This device supports I2C control interface and an IRQ output signal. It features +a PCM and PDM digital audio interface (DAI) and a differential analog input. + +Required properties: + + - compatible : "maxim,max98504" + - reg : should contain the I2C slave device address + - DVDD-supply, DIOVDD-supply, PVDD-supply: power supplies for the device, + as covered in ../regulator/regulator.txt + - interrupts : should specify the interrupt line the device is connected to, + as described in ../interrupt-controller/interrupts.txt + +Optional properties: + + - maxim,brownout-threshold - the PVDD brownout threshold, the value must be + from 0, 1...21 range, corresponding to 2.6V, 2.65V...3.65V voltage range + - maxim,brownout-attenuation - the brownout attenuation to the speaker gain + applied during the "attack hold" and "timed hold" phase, the value must be + from 0...6 (dB) range + - maxim,brownout-attack-hold-ms - the brownout attack hold phase time in ms, + 0...255 (VBATBROWN_ATTK_HOLD, register 0x0018) + - maxim,brownout-timed-hold-ms - the brownout timed hold phase time in ms, + 0...255 (VBATBROWN_TIME_HOLD, register 0x0019) + - maxim,brownout-release-rate-ms - the brownout release phase step time in ms, + 0...255 (VBATBROWN_RELEASE, register 0x001A) + +The default value when the above properties are not specified is 0, +the maxim,brownout-threshold property must be specified to actually enable +the PVDD brownout protection. + +Example: + + max98504@31 { + compatible = "maxim,max98504"; + reg = <0x31>; + interrupt-parent = <&gpio_bank_0>; + interrupts = <2 0>; + + DVDD-supply = <®ulator>; + DIOVDD-supply = <®ulator>; + PVDD-supply = <®ulator>; +}; |