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