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Diffstat (limited to 'Documentation/devicetree/bindings/iio/dac/mcp4725.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/dac/mcp4725.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/dac/mcp4725.txt b/Documentation/devicetree/bindings/iio/dac/mcp4725.txt new file mode 100644 index 000000000..1bc6c093f --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/mcp4725.txt @@ -0,0 +1,35 @@ +Microchip mcp4725 and mcp4726 DAC device driver + +Required properties: + - compatible: Must be "microchip,mcp4725" or "microchip,mcp4726" + - reg: Should contain the DAC I2C address + - vdd-supply: Phandle to the Vdd power supply. This supply is used as a + voltage reference on mcp4725. It is used as a voltage reference on + mcp4726 if there is no vref-supply specified. + +Optional properties (valid only for mcp4726): + - vref-supply: Optional phandle to the Vref power supply. Vref pin is + used as a voltage reference when this supply is specified. + - microchip,vref-buffered: Boolean to enable buffering of the external + Vref pin. This boolean is not valid without the vref-supply. Quoting + the datasheet: This is offered in cases where the reference voltage + does not have the current capability not to drop its voltage when + connected to the internal resistor ladder circuit. + +Examples: + + /* simple mcp4725 */ + mcp4725@60 { + compatible = "microchip,mcp4725"; + reg = <0x60>; + vdd-supply = <&vdac_vdd>; + }; + + /* mcp4726 with the buffered external reference voltage */ + mcp4726@60 { + compatible = "microchip,mcp4726"; + reg = <0x60>; + vdd-supply = <&vdac_vdd>; + vref-supply = <&vdac_vref>; + microchip,vref-buffered; + }; |