From: Lukas Funke lukas.funke@weidmueller.com
This series adds a driver to read and write ZynqMP eFuses [1]. The driver can be accessed by the 'fuse read' and 'fuse write' commands
Example:
=> fuse read 0 0xc 3 Reading bank 0:
Word 0x0000000c: 3cb16685 013af244 40000000
Note: Accessing eFuses requires eFuse access to be enabled in the underlying PMU firmware.
Use cases are: - Reading/writing user specific eFuses to enable device specific implementations - Revoking SPK IDs - Reading SoC version/DNA
[1] https://docs.amd.com/r/en-US/ug1085-zynq-ultrascale-trm/eFUSE
Changes in v2: - Drop vendor specific fuse cmd, use existing fuse cmd - Minor code refactoring (reverse x-mas tree)
Lukas Funke (2): firmware: zynqmp: Add support to access efuses drivers: misc: Add driver to access ZynqMP efuses
drivers/firmware/firmware-zynqmp.c | 31 +++ drivers/misc/Kconfig | 8 + drivers/misc/Makefile | 1 + drivers/misc/zynqmp_efuse.c | 324 +++++++++++++++++++++++++++++ include/zynqmp_firmware.h | 2 + 5 files changed, 366 insertions(+) create mode 100644 drivers/misc/zynqmp_efuse.c