Documentation/devicetree/bindings/iio/adc/mcp320x.txt

   1 * Microchip Analog to Digital Converter (ADC)
   2
   3 The node for this driver must be a child node of a SPI controller, hence
   4 all mandatory properties described in
   5
   6         Documentation/devicetree/bindings/spi/spi-bus.txt
   7
   8 must be specified.
   9
  10 Required properties:
  11         - compatible:   Must be one of the following, depending on the
  12                         model:
  13                                 "mcp3001" (DEPRECATED)
  14                                 "mcp3002" (DEPRECATED)
  15                                 "mcp3004" (DEPRECATED)
  16                                 "mcp3008" (DEPRECATED)
  17                                 "mcp3201" (DEPRECATED)
  18                                 "mcp3202" (DEPRECATED)
  19                                 "mcp3204" (DEPRECATED)
  20                                 "mcp3208" (DEPRECATED)
  21                                 "mcp3301" (DEPRECATED)
  22
  23                                 "microchip,mcp3001"
  24                                 "microchip,mcp3002"
  25                                 "microchip,mcp3004"
  26                                 "microchip,mcp3008"
  27                                 "microchip,mcp3201"
  28                                 "microchip,mcp3202"
  29                                 "microchip,mcp3204"
  30                                 "microchip,mcp3208"
  31                                 "microchip,mcp3301"
  32                                 "microchip,mcp3550-50"
  33                                 "microchip,mcp3550-60"
  34                                 "microchip,mcp3551"
  35                                 "microchip,mcp3553"
  36
  37                         NOTE: The use of the compatibles with no vendor prefix
  38                         is deprecated and only listed because old DT use them.
  39
  40         - spi-cpha, spi-cpol (boolean):
  41                         Either SPI mode (0,0) or (1,1) must be used, so specify
  42                         none or both of spi-cpha, spi-cpol.  The MCP3550/1/3
  43                         is more efficient in mode (1,1) as only 3 instead of
  44                         4 bytes need to be read from the ADC, but not all SPI
  45                         masters support it.
  46
  47         - vref-supply:  Phandle to the external reference voltage supply.
  48
  49 Examples:
  50 spi_controller {
  51         mcp3x0x@0 {
  52                 compatible = "microchip,mcp3002";
  53                 reg = <0>;
  54                 spi-max-frequency = <1000000>;
  55                 vref-supply = <&vref_reg>;
  56         };
  57 };