blob: 4cf595d681e655b399ef67e50f9482e6fdc0e364 [file] [log] [blame]
What: /sys/devices/*/<our-device>/nvmem
Date: December 2017
Contact: PrasannaKumar Muralidharan <>
Description: read-only access to the efuse on the Ingenic JZ4780 SoC
The SoC has a one time programmable 8K efuse that is
split into segments. The driver supports read only.
The segments are:
===== ======== =================
0x000 64 bit Random Number
0x008 128 bit Ingenic Chip ID
0x018 128 bit Customer ID
0x028 3520 bit Reserved
0x1E0 8 bit Protect Segment
0x1E1 2296 bit HDMI Key
0x300 2048 bit Security boot key
===== ======== =================
Users: any user space application which wants to read the Chip
and Customer ID