From: Lothar Rubusch <l.rubusch@gmail.com> To: herbert@gondor.apana.org.au, davem@davemloft.net Cc: nicolas.ferre@microchip.com, alexandre.belloni@bootlin.com, claudiu.beznea@tuxon.dev, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, l.rubusch@gmail.com Subject: [PATCH 0/5] crypto: atmel-sha204a - read out otp zone Date: Sat, 27 Apr 2024 00:14:34 +0000 [thread overview] Message-ID: <20240427001439.12726-1-l.rubusch@gmail.com> (raw) 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@gmail.com> --- Lothar Rubusch (5): crypto: atmel-i2 - add missing arg description crypto: atmel-sha204a - remove unused includes 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 | 77 ++++++++++++++++++++++++++++++---- 3 files changed, 102 insertions(+), 13 deletions(-) -- 2.39.2
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From: Lothar Rubusch <l.rubusch@gmail.com> To: herbert@gondor.apana.org.au, davem@davemloft.net Cc: alexandre.belloni@bootlin.com, linux-kernel@vger.kernel.org, l.rubusch@gmail.com, linux-crypto@vger.kernel.org, claudiu.beznea@tuxon.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/5] crypto: atmel-sha204a - read out otp zone Date: Sat, 27 Apr 2024 00:14:34 +0000 [thread overview] Message-ID: <20240427001439.12726-1-l.rubusch@gmail.com> (raw) 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@gmail.com> --- Lothar Rubusch (5): crypto: atmel-i2 - add missing arg description crypto: atmel-sha204a - remove unused includes 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 | 77 ++++++++++++++++++++++++++++++---- 3 files changed, 102 insertions(+), 13 deletions(-) -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2024-04-27 0:14 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-27 0:14 Lothar Rubusch [this message] 2024-04-27 0:14 ` [PATCH 0/5] crypto: atmel-sha204a - read out otp zone Lothar Rubusch 2024-04-27 0:14 ` [PATCH 1/5] crypto: atmel-i2 - add missing arg description Lothar Rubusch 2024-04-27 0:14 ` Lothar Rubusch 2024-04-27 0:14 ` [PATCH 2/5] crypto: atmel-sha204a - remove unused includes Lothar Rubusch 2024-04-27 0:14 ` Lothar Rubusch 2024-05-03 10:42 ` Herbert Xu 2024-05-03 10:42 ` Herbert Xu 2024-04-27 0:14 ` [PATCH 3/5] crypto: atmel-i2c - rename read function Lothar Rubusch 2024-04-27 0:14 ` Lothar Rubusch 2024-04-27 0:14 ` [PATCH 4/5] crypto: atmel-sha204a - add reading from otp zone Lothar Rubusch 2024-04-27 0:14 ` Lothar Rubusch 2024-04-27 0:14 ` [PATCH 5/5] crypto: atmel-sha204a - provide the otp content Lothar Rubusch 2024-04-27 0:14 ` Lothar Rubusch
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