On Fri, Mar 22, 2024 at 10:54:04AM +0800, Seven Lee wrote: > Add a DT schema for describing nau8325 audio amplifiers. The key features > are as follows: > - Low SPK_VDD Quiescent Current > - Gain Setting with 2-wire interface > - Powerful Stereo Class-D Amplifier > - Low Output Noise > - Low Current Shutdown Mode > - Click-and Pop Suppression > > More resources : > https://www.nuvoton.com/products/smart-home-audio/audio-amplifiers/class-d-series/nau8325yg/ > > Signed-off-by: Seven Lee <wtli@xxxxxxxxxxx> > --- > .../bindings/sound/nuvoton,nau8325.yaml | 90 +++++++++++++++++++ > 1 file changed, 90 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/nuvoton,nau8325.yaml > > diff --git a/Documentation/devicetree/bindings/sound/nuvoton,nau8325.yaml b/Documentation/devicetree/bindings/sound/nuvoton,nau8325.yaml > new file mode 100644 > index 000000000000..6ded94c0e644 > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/nuvoton,nau8325.yaml > @@ -0,0 +1,90 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/sound/nuvoton,nau8325.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: NAU8325 audio Amplifier > + > +maintainers: > + - Seven Lee <WTLI@xxxxxxxxxxx> > + > +allOf: > + - $ref: dai-common.yaml# > + > +properties: > + compatible: > + const: nuvoton,nau8325 > + > + reg: > + maxItems: 1 > + > + nuvoton,vref-impedance: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + The vref impedance to be used in kohms. Middle of voltage enables > + Tie-Off selection options. Due to the high impedance of the VREF > + pin, it is important to use a low-leakage capacitor. Possible > + values are 0, 1, 2, and 3 as per the below, > + > + 0 = Disable tie off resistance > + 1 = 25 kohms > + 2 = 125 kohms > + 3 = 2.5 kohms > + enum: [ 0, 1, 2, 3 ] Once again, use standard unit suffix on the property name: nuvoton,vref-impedance-ohms: enum: [0, 2500, 25000, 125000] Rob
