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kernel / Documentation / ABI / testing / sysfs-driver-jz4780-efuse
at v6.8 20 lines 692 B view raw
1What: /sys/devices/*/<our-device>/nvmem 2Date: December 2017 3Contact: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> 4Description: read-only access to the efuse on the Ingenic JZ4780 SoC 5 The SoC has a one time programmable 8K efuse that is 6 split into segments. The driver supports read only. 7 The segments are: 8 9 ===== ======== ================= 10 0x000 64 bit Random Number 11 0x008 128 bit Ingenic Chip ID 12 0x018 128 bit Customer ID 13 0x028 3520 bit Reserved 14 0x1E0 8 bit Protect Segment 15 0x1E1 2296 bit HDMI Key 16 0x300 2048 bit Security boot key 17 ===== ======== ================= 18 19Users: any user space application which wants to read the Chip 20 and Customer ID