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mcp320x.txt

mcp320x.txt 1.5 KB
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  1. * Microchip Analog to Digital Converter (ADC)
    2. 

  2. 

  3. The node for this driver must be a child node of a SPI controller, hence
    4. 

  4. all mandatory properties described in
    5. 

  5. 

  6.         Documentation/devicetree/bindings/spi/spi-bus.txt
    7. 

  7. 

  8. must be specified.
    9. 

  9. 

  10. Required properties:
    11. 

  11. 	- compatible:  	Must be one of the following, depending on the
    12. 

  12. 			model:
    13. 

  13. 				"mcp3001" (DEPRECATED)
    14. 

  14. 				"mcp3002" (DEPRECATED)
    15. 

  15. 				"mcp3004" (DEPRECATED)
    16. 

  16. 				"mcp3008" (DEPRECATED)
    17. 

  17. 				"mcp3201" (DEPRECATED)
    18. 

  18. 				"mcp3202" (DEPRECATED)
    19. 

  19. 				"mcp3204" (DEPRECATED)
    20. 

  20. 				"mcp3208" (DEPRECATED)
    21. 

  21. 				"mcp3301" (DEPRECATED)
    22. 

  22. 

  23. 				"microchip,mcp3001"
    24. 

  24. 				"microchip,mcp3002"
    25. 

  25. 				"microchip,mcp3004"
    26. 

  26. 				"microchip,mcp3008"
    27. 

  27. 				"microchip,mcp3201"
    28. 

  28. 				"microchip,mcp3202"
    29. 

  29. 				"microchip,mcp3204"
    30. 

  30. 				"microchip,mcp3208"
    31. 

  31. 				"microchip,mcp3301"
    32. 

  32. 				"microchip,mcp3550-50"
    33. 

  33. 				"microchip,mcp3550-60"
    34. 

  34. 				"microchip,mcp3551"
    35. 

  35. 				"microchip,mcp3553"
    36. 

  36. 

  37. 			NOTE: The use of the compatibles with no vendor prefix
    38. 

  38. 			is deprecated and only listed because old DT use them.
    39. 

  39. 

  40. 	- spi-cpha, spi-cpol (boolean):
    41. 

  41. 			Either SPI mode (0,0) or (1,1) must be used, so specify
    42. 

  42. 			none or both of spi-cpha, spi-cpol.  The MCP3550/1/3
    43. 

  43. 			is more efficient in mode (1,1) as only 3 instead of
    44. 

  44. 			4 bytes need to be read from the ADC, but not all SPI
    45. 

  45. 			masters support it.
    46. 

  46. 

  47. 	- vref-supply:	Phandle to the external reference voltage supply.
    48. 

  48. 

  49. Examples:
    50. 

  50. spi_controller {
    51. 

  51. 	mcp3x0x@0 {
    52. 

  52. 		compatible = "microchip,mcp3002";
    53. 

  53. 		reg = <0>;
    54. 

  54. 		spi-max-frequency = <1000000>;
    55. 

  55. 		vref-supply = <&vref_reg>;
    56. 

  56. 	};
    57. 

  57. };
    58.