[PATCH v6 2/7] tpm: rng: Add driver model interface for TPM RNG device

[Simon Glass]

Hi Sughosh,

On Mon, 4 Jul 2022 at 07:35, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
>
> The TPM device has a builtin random number generator(RNG)
> functionality. Expose the RNG functions of the TPM device to the
> driver model so that they can be used by the EFI_RNG_PROTOCOL if the
> protocol is installed.
>
> Also change the function arguments and return type of the random
> number functions to comply with the driver model api.
>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> ---
> Changes since V5:
> * Use the dev_get_parent() interface for getting the TPM device when
>   calling the tpm_get_random() function
>
>  drivers/rng/Kconfig   | 11 +++++++++++
>  drivers/rng/Makefile  |  1 +
>  drivers/rng/tpm_rng.c | 23 +++++++++++++++++++++++
>  lib/Kconfig           |  1 +
>  lib/tpm-v1.c          | 13 +++++++------
>  lib/tpm-v2.c          |  6 +++---
>  lib/tpm_api.c         |  6 +++---
>  7 files changed, 49 insertions(+), 12 deletions(-)
>  create mode 100644 drivers/rng/tpm_rng.c

The API change should not be needed. The code that calls the TPM
routines should adapt for that.

Regards,
Simon