README.fsl_iim 1.4 KB

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  1. Driver implementing the fuse API for Freescale's IC Identification Module (IIM)
  2. This IP can be found on the following SoCs:
  3. - MPC512x,
  4. - i.MX25,
  5. - i.MX27,
  6. - i.MX31,
  7. - i.MX35,
  8. - i.MX51,
  9. - i.MX53.
  10. The section numbers in this file refer to the i.MX25 Reference Manual.
  11. A fuse word contains 8 fuse bit slots, as explained in 30.4.2.2.1.
  12. A bank contains 256 fuse word slots, as shown by the memory map in 30.3.1.
  13. Some fuse bit or word slots may not have the corresponding fuses actually
  14. implemented in the fusebox.
  15. See the README files of the SoCs using this driver in order to know the
  16. conventions used by U-Boot to store some specific data in the fuses, e.g. MAC
  17. addresses.
  18. Fuse operations:
  19. Read
  20. Read operations are implemented as read accesses to the shadow registers,
  21. using "Word y of Bank x" from the register summary in 30.3.2. This is
  22. explained in detail in 30.4.5.1.
  23. Sense
  24. Sense operations are implemented as explained in 30.4.5.2.
  25. Program
  26. Program operations are implemented as explained in 30.4.5.3. Following
  27. this operation, the shadow registers are reloaded by the hardware (not
  28. immediately, but this does not make any difference for a user reading
  29. these registers).
  30. Override
  31. Override operations are implemented as write accesses to the shadow
  32. registers, as explained in 30.4.5.4.
  33. Configuration:
  34. CONFIG_FSL_IIM
  35. Define this to enable the fsl_iim driver.