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i2c-rcar.txt

i2c-rcar.txt 2.3 KB
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  1. I2C for R-Car platforms
    2. 

  2. 

  3. Required properties:
    4. 

  4. - compatible:
    5. 

  5. 	"renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC.
    6. 

  6. 	"renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC.
    7. 

  7. 	"renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC.
    8. 

  8. 	"renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC.
    9. 

  9. 	"renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC.
    10. 

  10. 	"renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC.
    11. 

  11. 	"renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC.
    12. 

  12. 	"renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC.
    13. 

  13. 	"renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC.
    14. 

  14. 	"renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC.
    15. 

  15. 	"renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC.
    16. 

  16. 	"renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC.
    17. 

  17. 	"renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC.
    18. 

  18. 	"renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC.
    19. 

  19. 	"renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC.
    20. 

  20. 	"renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC.
    21. 

  21. 	"renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device.
    22. 

  22. 	"renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible
    23. 

  23. 				device.
    24. 

  24. 	"renesas,rcar-gen3-i2c" for a generic R-Car Gen3 compatible device.
    25. 

  25. 	"renesas,i2c-rcar" (deprecated)
    26. 

  26. 

  27. 	When compatible with the generic version, nodes must list the
    28. 

  28. 	SoC-specific version corresponding to the platform first followed
    29. 

  29. 	by the generic version.
    30. 

  30. 

  31. - reg: physical base address of the controller and length of memory mapped
    32. 

  32.   region.
    33. 

  33. - interrupts: interrupt specifier.
    34. 

  34. 

  35. Optional properties:
    36. 

  36. - clock-frequency: desired I2C bus clock frequency in Hz. The absence of this
    37. 

  37.   property indicates the default frequency 100 kHz.
    38. 

  38. - clocks: clock specifier.
    39. 

  39. - dmas: Must contain a list of two references to DMA specifiers, one for
    40. 

  40.   transmission, and one for reception.
    41. 

  41. - dma-names: Must contain a list of two DMA names, "tx" and "rx".
    42. 

  42. 

  43. - i2c-scl-falling-time-ns: see i2c.txt
    44. 

  44. - i2c-scl-internal-delay-ns: see i2c.txt
    45. 

  45. - i2c-scl-rising-time-ns: see i2c.txt
    46. 

  46. 

  47. Examples :
    48. 

  48. 

  49. i2c0: i2c@e6508000 {
    50. 

  50. 	#address-cells = <1>;
    51. 

  51. 	#size-cells = <0>;
    52. 

  52. 	compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
    53. 

  53. 	reg = <0 0xe6508000 0 0x40>;
    54. 

  54. 	interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>;
    55. 

  55. 	clocks = <&mstp9_clks R8A7791_CLK_I2C0>;
    56. 

  56. 	clock-frequency = <400000>;
    57. 

  57. };
    58.