Read out otp memory zone of this secure eeprom and rng chip. The chip
has an otp zone and data zone, both still not accessed. The otp zone
can be used to store persistently serial numbers or similar, if externally
pre-configured. In any way the Atmel SHA204a needs to be preconfgured and
fuse locked in order to be useful also for the already implemented RNG
functionality. Placing data into the otp zone is optional. If empty, the
chip returns 0xff on all field. The implementation passes the content to
a new sysfs handle to userspace. If the chip is locked or not accessible
no sysfs handle is set.
Signed-off-by: Lothar Rubusch <[email protected]>
---
v1 -> v2
- fix typo in commit title
- drop patch: remove unused includes
Lothar Rubusch (4):
crypto: atmel-i2c - add missing arg description
crypto: atmel-i2c - rename read function
crypto: atmel-sha204a - add reading from otp zone
crypto: atmel-sha204a - provide the otp content
drivers/crypto/atmel-i2c.c | 30 +++++++++++++--
drivers/crypto/atmel-i2c.h | 8 +++-
drivers/crypto/atmel-sha204a.c | 68 ++++++++++++++++++++++++++++++++++
3 files changed, 102 insertions(+), 4 deletions(-)
--
2.25.1