tree b8f487a5d72982d3868dc45e3f6a387d02c529a7
parent e7d6d7213c590b432dde83092a93ee8c18b64452
author Leo Yan <leo.yan@arm.com> 1720542189 +0100
committer Tom Rini <trini@konsulko.com> 1721310030 -0600

driver: rng: Do not check ARM_SMCCC_TRNG_VERSION

As described in the document SMC Calling Convention (ARM DEN 0028 1.5 F),
section 7 "Arm Architecture Calls", the SMC call SMCCC_ARCH_FEATURES is
not expected to support the function ID ARM_SMCCC_TRNG_VERSION. Trusted
Firmware-A follows up the specification in its implementation.

This commit removes the invocation to avoid the failure - which is a
wrong calling in U-boot. The later code invokes ARM_SMCCC_TRNG_VERSION
for retrieving the TRNG version, except it can read back the version
number, it also can be used to detect whether the TRNG is supported or
not.

Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Weizhao Ouyang <o451686892@gmail.com>