1 What: /sys/devices/*/<our-device>/nv 1 What: /sys/devices/*/<our-device>/nvmem
2 Date: December 2017 2 Date: December 2017
3 Contact: PrasannaKumar Muralidharan <pra 3 Contact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
4 Description: read-only access to the efuse 4 Description: read-only access to the efuse on the Ingenic JZ4780 SoC
5 The SoC has a one time program 5 The SoC has a one time programmable 8K efuse that is
6 split into segments. The drive 6 split into segments. The driver supports read only.
7 The segments are: 7 The segments are:
8 8
9 ===== ======== =============== 9 ===== ======== =================
10 0x000 64 bit Random Number 10 0x000 64 bit Random Number
11 0x008 128 bit Ingenic Chip ID 11 0x008 128 bit Ingenic Chip ID
12 0x018 128 bit Customer ID 12 0x018 128 bit Customer ID
13 0x028 3520 bit Reserved 13 0x028 3520 bit Reserved
14 0x1E0 8 bit Protect Segment 14 0x1E0 8 bit Protect Segment
15 0x1E1 2296 bit HDMI Key 15 0x1E1 2296 bit HDMI Key
16 0x300 2048 bit Security boot k 16 0x300 2048 bit Security boot key
17 ===== ======== =============== 17 ===== ======== =================
18 18
19 Users: any user space application whi 19 Users: any user space application which wants to read the Chip
20 and Customer ID 20 and Customer ID
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.