21 lines
692 B
Plaintext
21 lines
692 B
Plaintext
What: /sys/devices/*/<our-device>/nvmem
|
|
Date: December 2017
|
|
Contact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
|
|
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
|