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Diffstat (limited to 'Documentation/devicetree/bindings/iio/adc/mcp320x.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/mcp320x.txt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/mcp320x.txt b/Documentation/devicetree/bindings/iio/adc/mcp320x.txt new file mode 100644 index 000000000..56373d643 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/mcp320x.txt @@ -0,0 +1,57 @@ +* 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>; + }; +}; |