linux-kernel - [PATCH v2 0/4] crypto: atmel-sha204a

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Date: Fri,  3 May 2024 21:10:50 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: herbert@...dor.apana.org.au,
	davem@...emloft.net
Cc: nicolas.ferre@...rochip.com,
	alexandre.belloni@...tlin.com,
	claudiu.beznea@...on.dev,
	linux-crypto@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	l.rubusch@...il.com
Subject: [PATCH v2 0/4] crypto: atmel-sha204a - read out otp zone

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 <l.rubusch@...il.com>
---
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