On 25/11/2022 09:54, Binbin Zhou wrote: > Add device tree bindings for the i2c controller on the Loongson-2K Soc > or Loongosn LS7A bridge. > ... > + > +unevaluatedProperties: false > + > +examples: > + - | > + i2c@1fe21000 { > + compatible = "loongson,ls2k-i2c"; > + reg = <0 0x1fe21000 0 0x8>; Plus what the Rob's robot told you - code testing examples uses 1 for address/size cells. Please run `make dt_binding_check` (see Documentation/devicetree/bindings/writing-schema.rst for instructions). Best regards, Krzysztof