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

[Sughosh Ganu]

hi Simon,

On Tue, 5 Jul 2022 at 15:17, Simon Glass <sjg at chromium.org> wrote:
>
> 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.

Are you referring to the changes made in tpm[1,2]_get_random
functions? If so, those changes in the return values have been made
based on review comments from Heinrich[1]. If you are referring to
some other changes, please let me know. Thanks.

-sughosh

[1] - https://lists.denx.de/pipermail/u-boot/2022-February/476085.html

>
> Regards,
> Simon