requested to merge github/fork/masahisak/synquacer/support_scmi_shutdown into master
Created by: masahisak
This commit implements the system power-off handling by turning off the ATX power supply through GPIO.
Before this commit, system power-off handling is implemented in Trusted Firmware-A running on the application processor(cortex-a53). Since SCP is responsible for managing system power, system power-off should be implemented in SCP-firmware.
Together with this SCP-firmware update, Trusted Firmware-A PSCI system_off handling also needs to be updated to call SCMI SYSTEM_POWER_STATE_SET command.
Signed-off-by: Masahisa Kojima firstname.lastname@example.org Change-Id: Ia96bc13ea5e74f892295dee3a4896bf5a7e6fb46