Documentation/ABI/testing/sysfs-driver-jz4780-efuse

   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                 ===== ======== =================
  10                 0x000   64 bit Random Number
  11                 0x008  128 bit Ingenic Chip ID
  12                 0x018  128 bit Customer ID
  13                 0x028 3520 bit Reserved
  14                 0x1E0    8 bit Protect Segment
  15                 0x1E1 2296 bit HDMI Key
  16                 0x300 2048 bit Security boot key
  17                 ===== ======== =================
  18
  19 Users:          any user space application which wants to read the Chip
  20                 and Customer ID