sysfs-driver-jz4780-efuse 692 B

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  1. What: /sys/devices/*/<our-device>/nvmem
  2. Date: December 2017
  3. Contact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
  4. Description: read-only access to the efuse on the Ingenic JZ4780 SoC
  5. The SoC has a one time programmable 8K efuse that is
  6. split into segments. The driver supports read only.
  7. The segments are:
  8. ===== ======== =================
  9. 0x000 64 bit Random Number
  10. 0x008 128 bit Ingenic Chip ID
  11. 0x018 128 bit Customer ID
  12. 0x028 3520 bit Reserved
  13. 0x1E0 8 bit Protect Segment
  14. 0x1E1 2296 bit HDMI Key
  15. 0x300 2048 bit Security boot key
  16. ===== ======== =================
  17. Users: any user space application which wants to read the Chip
  18. and Customer ID