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crypto: sun8i-ce - Add support for the TRNG

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This patch had support for the TRNG present in the CE.
Note that according to the algorithm ID, 2 version of the TRNG exists,
the first present in H3/H5/R40/A64 and the second present in H6.
This patch adds support for both, but only the second is working
reliabily according to rngtest.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Corentin Labbe
2020-09-18 07:23:13 +00:00
committed by Herbert Xu
parent 5eb7e94688
commit 4a07eab32f
5 changed files with 172 additions and 0 deletions
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8
drivers/crypto/allwinner/Kconfig
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@@ -77,6 +77,14 @@ config CRYPTO_DEV_SUN8I_CE_PRNG
Select this option if you want to provide kernel-side support for
the Pseudo-Random Number Generator found in the Crypto Engine.
config CRYPTO_DEV_SUN8I_CE_TRNG
bool "Support for Allwinner Crypto Engine TRNG"
depends on CRYPTO_DEV_SUN8I_CE
select HW_RANDOM
help
Select this option if you want to provide kernel-side support for
the True Random Number Generator found in the Crypto Engine.
config CRYPTO_DEV_SUN8I_SS
tristate "Support for Allwinner Security System cryptographic offloader"
select CRYPTO_SKCIPHER