| 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; |
| }; |
