162306a36Sopenharmony_ciWhat: /sys/devices/*/<our-device>/nvmem 262306a36Sopenharmony_ciDate: December 2017 362306a36Sopenharmony_ciContact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> 462306a36Sopenharmony_ciDescription: read-only access to the efuse on the Ingenic JZ4780 SoC 562306a36Sopenharmony_ci The SoC has a one time programmable 8K efuse that is 662306a36Sopenharmony_ci split into segments. The driver supports read only. 762306a36Sopenharmony_ci The segments are: 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci ===== ======== ================= 1062306a36Sopenharmony_ci 0x000 64 bit Random Number 1162306a36Sopenharmony_ci 0x008 128 bit Ingenic Chip ID 1262306a36Sopenharmony_ci 0x018 128 bit Customer ID 1362306a36Sopenharmony_ci 0x028 3520 bit Reserved 1462306a36Sopenharmony_ci 0x1E0 8 bit Protect Segment 1562306a36Sopenharmony_ci 0x1E1 2296 bit HDMI Key 1662306a36Sopenharmony_ci 0x300 2048 bit Security boot key 1762306a36Sopenharmony_ci ===== ======== ================= 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ciUsers: any user space application which wants to read the Chip 2062306a36Sopenharmony_ci and Customer ID 21