drivers/firmware/smccc/Kconfig v5.13-rc1

HAVE_ARM_SMCCC

Include support for the Secure Monitor Call (SMC) and Hypervisor
Call (HVC) instructions on Armv7 and above architectures.

HAVE_ARM_SMCCC_DISCOVERY

SMCCC v1.0 lacked discoverability and hence PSCI v1.0 was updated
to add SMCCC discovery mechanism though the PSCI firmware
implementation of PSCI_FEATURES(SMCCC_VERSION) which returns
success on firmware compliant to SMCCC v1.1 and above.

ARM_SMCCC_SOC_ID

SoC bus device for the ARM SMCCC SOC_ID

Include support for the SoC bus on the ARM SMCCC firmware based
platforms providing some sysfs information about the SoC variant.