[PATCH 4/4] crypto/fsl: add RNG support

[Heinrich Schuchardt]

On 6/3/20 12:05 AM, Michael Walle wrote:
> Register the random number generator with the rng subsystem in u-boot.
> This way it can be used by EFI as well as for the 'rng' command.
>
> Signed-off-by: Michael Walle <michael at walle.cc>
> ---
>  drivers/crypto/fsl/Kconfig   | 11 +++++
>  drivers/crypto/fsl/Makefile  |  1 +
>  drivers/crypto/fsl/jobdesc.c |  9 ++++
>  drivers/crypto/fsl/jobdesc.h |  3 ++
>  drivers/crypto/fsl/jr.c      |  9 ++++
>  drivers/crypto/fsl/rng.c     | 84 ++++++++++++++++++++++++++++++++++++
>  6 files changed, 117 insertions(+)
>  create mode 100644 drivers/crypto/fsl/rng.c
>
> diff --git a/drivers/crypto/fsl/Kconfig b/drivers/crypto/fsl/Kconfig
> index 181a1e5e99..5936b77494 100644
> --- a/drivers/crypto/fsl/Kconfig
> +++ b/drivers/crypto/fsl/Kconfig
> @@ -45,3 +45,14 @@ config SYS_FSL_SEC_COMPAT
>
>  config SYS_FSL_SEC_LE
>  	bool "Little-endian access to Freescale Secure Boot"
> +
> +if FSL_CAAM
> +
> +config FSL_CAAM_RNG
> +	bool "Enable Random Number Generator support"
> +	depends on DM_RNG
> +	default y
> +	help
> +	  Enable support for the random number generator module of the CAAM.

Hello Michael,

when typing CAAM into Google I got a lot of answers but "Cryptographic
Accelerator and Assurance Module" was not under the first 50 hits.

If this is a hardware RNG I think we should put this into the text.

So how about:

"Enable support the hardware random number generator of Freescale SOCs
using the Cryptographic Accelerator and Assurance Module (CAAM)."

Best regards

Heinrich