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tpm: rng: Add driver model interface for TPM RNG device

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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@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Sughosh Ganu 2022-07-22 21:32:04 +05:30 • committed by Ilias Apalodimas
parent 5d98329196
commit e67ffb5aa5
5 changed files with 37 additions and 3 deletions
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6
lib/tpm_api.c
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@ -269,7 +269,7 @@ u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
if (tpm_is_v1(dev))
return tpm1_get_random(dev, data, count);
else if (tpm_is_v2(dev))
return -ENOSYS; /* not implemented yet */
else
return -ENOSYS;
return tpm2_get_random(dev, data, count);
return -ENOSYS;
}