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| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-jz4780-efuse | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-jz4780-efuse b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse new file mode 100644 index 0000000000..4cf595d681 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse @@ -0,0 +1,20 @@ +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 |