1Linear Technology LTC2632/2634/2636 DAC 2 3Required properties: 4 - compatible: Has to contain one of the following: 5 lltc,ltc2632-l12 6 lltc,ltc2632-l10 7 lltc,ltc2632-l8 8 lltc,ltc2632-h12 9 lltc,ltc2632-h10 10 lltc,ltc2632-h8 11 lltc,ltc2634-l12 12 lltc,ltc2634-l10 13 lltc,ltc2634-l8 14 lltc,ltc2634-h12 15 lltc,ltc2634-h10 16 lltc,ltc2634-h8 17 lltc,ltc2636-l12 18 lltc,ltc2636-l10 19 lltc,ltc2636-l8 20 lltc,ltc2636-h12 21 lltc,ltc2636-h10 22 lltc,ltc2636-h8 23 24Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt 25apply. In particular, "reg" and "spi-max-frequency" properties must be given. 26 27Optional properties: 28 - vref-supply: Phandle to the external reference voltage supply. This should 29 only be set if there is an external reference voltage connected to the VREF 30 pin. If the property is not set the internal reference is used. 31 32Example: 33 34 vref: regulator-vref { 35 compatible = "regulator-fixed"; 36 regulator-name = "vref-ltc2632"; 37 regulator-min-microvolt = <1250000>; 38 regulator-max-microvolt = <1250000>; 39 regulator-always-on; 40 }; 41 42 spi_master { 43 dac: ltc2632@0 { 44 compatible = "lltc,ltc2632-l12"; 45 reg = <0>; /* CS0 */ 46 spi-max-frequency = <1000000>; 47 vref-supply = <&vref>; /* optional */ 48 }; 49 }; 50