Re: [PATCH] driver: rng: Do not check ARM_SMCCC_TRNG_VERSION

On Tue, 09 Jul 2024 17:23:09 +0100, Leo Yan wrote:

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.

[...]

Applied to u-boot/master, thanks!