mcp4725.txt

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    1 Microchip mcp4725 and mcp4726 DAC device driver
    2 
    3 Required properties:
    4         - compatible: Must be "microchip,mcp4725" or "microchip,mcp4726"
    5         - reg: Should contain the DAC I2C address
    6         - vdd-supply: Phandle to the Vdd power supply. This supply is used as a
    7           voltage reference on mcp4725. It is used as a voltage reference on
    8           mcp4726 if there is no vref-supply specified.
    9 
   10 Optional properties (valid only for mcp4726):
   11         - vref-supply: Optional phandle to the Vref power supply. Vref pin is
   12           used as a voltage reference when this supply is specified.
   13         - microchip,vref-buffered: Boolean to enable buffering of the external
   14           Vref pin. This boolean is not valid without the vref-supply. Quoting
   15           the datasheet: This is offered in cases where the reference voltage
   16           does not have the current capability not to drop its voltage when
   17           connected to the internal resistor ladder circuit.
   18 
   19 Examples:
   20 
   21         /* simple mcp4725 */
   22         mcp4725@60 {
   23                 compatible = "microchip,mcp4725";
   24                 reg = <0x60>;
   25                 vdd-supply = <&vdac_vdd>;
   26         };
   27 
   28         /* mcp4726 with the buffered external reference voltage */
   29         mcp4726@60 {
   30                 compatible = "microchip,mcp4726";
   31                 reg = <0x60>;
   32                 vdd-supply = <&vdac_vdd>;
   33                 vref-supply = <&vdac_vref>;
   34                 microchip,vref-buffered;
   35         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/iio/dac/mcp4725.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/iio/dac/mcp4725.txt