1* Microchip Analog to Digital Converter (ADC)
2
3The node for this driver must be a child node of a SPI controller, hence
4all mandatory properties described in
5
6        Documentation/devicetree/bindings/spi/spi-bus.txt
7
8must be specified.
9
10Required 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
49Examples:
50spi_controller {
51	mcp3x0x@0 {
52		compatible = "microchip,mcp3002";
53		reg = <0>;
54		spi-max-frequency = <1000000>;
55		vref-supply = <&vref_reg>;
56	};
57};
58