sysreset: psci: support system reset in a generic way with PSCI
If the system is running PSCI firmware, the System Reset function
(func ID: 0x80000009) is supposed to be handled by PSCI, that is,
the SoC/board specific reset implementation should be moved to PSCI.
U-Boot should call the PSCI service according to the arm-smccc
manner.
The arm-smccc is supported on ARMv7 or later. Especially, ARMv8
generation SoCs are likely to run ARM Trusted Firmware BL31. In
this case, U-Boot is a non-secure world boot loader, so it should
not be able to reset the system directly.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 16578b8..7812f21 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -177,6 +177,7 @@
config ARM_SMCCC
bool "Support for ARM SMC Calling Convention (SMCCC)"
depends on CPU_V7 || ARM64
+ select ARM_PSCI_FW
help
Say Y here if you want to enable ARM SMC Calling Convention.
This should be enabled if U-Boot needs to communicate with system