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Commit 11105693 authored by Tudor-Dan Ambarus's avatar Tudor-Dan Ambarus Committed by Herbert Xu
Browse files

crypto: atmel-ecc - introduce Microchip / Atmel ECC driver 



Add ECDH support for ATECC508A (I2C) device.

The device features hardware acceleration for the NIST standard
P256 prime curve and supports the complete key life cycle from
private key generation to ECDH key agreement.

Random private key generation is supported internally within
the device to ensure that the private key can never be known
outside of the device. If the user wants to use its own private
keys, the driver will fallback to the ecdh software implementation.

Signed-off-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 66d3994c

Documentation/devicetree/bindings/crypto/atmel-crypto.txt

+13 −0
Original line number Diff line number Diff line
@@ -66,3 +66,16 @@ sha@f8034000 { 
	dmas = <&dma1 2 17>;

	dma-names = "tx";

};



* Eliptic Curve Cryptography (I2C)



Required properties:

- compatible : must be "atmel,atecc508a".

- reg: I2C bus address of the device.

- clock-frequency: must be present in the i2c controller node.



Example:

atecc508a@C0 {

	compatible = "atmel,atecc508a";

	reg = <0xC0>;

};

drivers/crypto/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -525,6 +525,20 @@ config CRYPTO_DEV_ATMEL_SHA 
	  To compile this driver as a module, choose M here: the module

	  will be called atmel-sha.



config CRYPTO_DEV_ATMEL_ECC

	tristate "Support for Microchip / Atmel ECC hw accelerator"

	depends on ARCH_AT91 || COMPILE_TEST

	depends on I2C

	select CRYPTO_ECDH

	select CRC16

	help

	  Microhip / Atmel ECC hw accelerator.

	  Select this if you want to use the Microchip / Atmel module for

	  ECDH algorithm.



	  To compile this driver as a module, choose M here: the module

	  will be called atmel-ecc.



config CRYPTO_DEV_CCP

	bool "Support for AMD Cryptographic Coprocessor"

	depends on ((X86 && PCI) || (ARM64 && (OF_ADDRESS || ACPI))) && HAS_IOMEM

drivers/crypto/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_CRYPTO_DEV_ATMEL_AES) += atmel-aes.o

obj-$(CONFIG_CRYPTO_DEV_ATMEL_SHA) += atmel-sha.o

obj-$(CONFIG_CRYPTO_DEV_ATMEL_TDES) += atmel-tdes.o

obj-$(CONFIG_CRYPTO_DEV_ATMEL_ECC) += atmel-ecc.o

obj-$(CONFIG_CRYPTO_DEV_BFIN_CRC) += bfin_crc.o

obj-$(CONFIG_CRYPTO_DEV_CAVIUM_ZIP) += cavium/

obj-$(CONFIG_CRYPTO_DEV_CCP) += ccp/

drivers/crypto/atmel-ecc.c

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drivers/crypto/atmel-ecc.h

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