1*4882a593SmuzhiyunWhat: /sys/devices/*/<our-device>/nvmem 2*4882a593SmuzhiyunDate: December 2017 3*4882a593SmuzhiyunContact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> 4*4882a593SmuzhiyunDescription: read-only access to the efuse on the Ingenic JZ4780 SoC 5*4882a593Smuzhiyun The SoC has a one time programmable 8K efuse that is 6*4882a593Smuzhiyun split into segments. The driver supports read only. 7*4882a593Smuzhiyun The segments are: 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun ===== ======== ================= 10*4882a593Smuzhiyun 0x000 64 bit Random Number 11*4882a593Smuzhiyun 0x008 128 bit Ingenic Chip ID 12*4882a593Smuzhiyun 0x018 128 bit Customer ID 13*4882a593Smuzhiyun 0x028 3520 bit Reserved 14*4882a593Smuzhiyun 0x1E0 8 bit Protect Segment 15*4882a593Smuzhiyun 0x1E1 2296 bit HDMI Key 16*4882a593Smuzhiyun 0x300 2048 bit Security boot key 17*4882a593Smuzhiyun ===== ======== ================= 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunUsers: any user space application which wants to read the Chip 20*4882a593Smuzhiyun and Customer ID 21