Kernel-4.18.0-80.el8_mcp320x

• 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>;
};
};