| * Microchip Analog to Digital Converter (ADC) |
| |
| The node for this driver must be a child node of a SPI controller, hence |
| all mandatory properties described in |
| |
| Documentation/devicetree/bindings/spi/spi-bus.txt |
| |
| must be specified. |
| |
| Required properties: |
| - compatible: Must be one of the following, depending on the |
| model: |
| "mcp3001" (DEPRECATED) |
| "mcp3002" (DEPRECATED) |
| "mcp3004" (DEPRECATED) |
| "mcp3008" (DEPRECATED) |
| "mcp3201" (DEPRECATED) |
| "mcp3202" (DEPRECATED) |
| "mcp3204" (DEPRECATED) |
| "mcp3208" (DEPRECATED) |
| "mcp3301" (DEPRECATED) |
| |
| "microchip,mcp3001" |
| "microchip,mcp3002" |
| "microchip,mcp3004" |
| "microchip,mcp3008" |
| "microchip,mcp3201" |
| "microchip,mcp3202" |
| "microchip,mcp3204" |
| "microchip,mcp3208" |
| "microchip,mcp3301" |
| "microchip,mcp3550-50" |
| "microchip,mcp3550-60" |
| "microchip,mcp3551" |
| "microchip,mcp3553" |
| |
| NOTE: The use of the compatibles with no vendor prefix |
| is deprecated and only listed because old DT use them. |
| |
| - spi-cpha, spi-cpol (boolean): |
| Either SPI mode (0,0) or (1,1) must be used, so specify |
| none or both of spi-cpha, spi-cpol. The MCP3550/1/3 |
| is more efficient in mode (1,1) as only 3 instead of |
| 4 bytes need to be read from the ADC, but not all SPI |
| masters support it. |
| |
| - vref-supply: Phandle to the external reference voltage supply. |
| |
| Examples: |
| spi_controller { |
| mcp3x0x@0 { |
| compatible = "microchip,mcp3002"; |
| reg = <0>; |
| spi-max-frequency = <1000000>; |
| vref-supply = <&vref_reg>; |
| }; |
| }; |
