Linear Technology LTC2632 DAC device driver Required properties: - compatible: Has to contain one of the following: lltc,ltc2632-l12 lltc,ltc2632-l10 lltc,ltc2632-l8 lltc,ltc2632-h12 lltc,ltc2632-h10 lltc,ltc2632-h8 Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt apply. In particular, "reg" and "spi-max-frequency" properties must be given. Optional properties: - vref-supply: Phandle to the external reference voltage supply. This should only be set if there is an external reference voltage connected to the VREF pin. If the property is not set the internal reference is used. Example: vref: regulator-vref { compatible = "regulator-fixed"; regulator-name = "vref-ltc2632"; regulator-min-microvolt = <1250000>; regulator-max-microvolt = <1250000>; regulator-always-on; }; spi_master { dac: ltc2632@0 { compatible = "lltc,ltc2632-l12"; reg = <0>; /* CS0 */ spi-max-frequency = <1000000>; vref-supply = <&vref>; /* optional */ }; };