From 573a3811edc89c2ea3bf4fd077e3673b863b9a0d Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 14 Apr 2017 11:10:24 +0900 Subject: 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 --- drivers/sysreset/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/sysreset/Kconfig') diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index 05a37b9..9664630 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -13,4 +13,14 @@ config SYSRESET to effect a reset. The uclass will try all available drivers when reset_walk() is called. +if SYSRESET + +config SYSRESET_PSCI + bool "Enable support for PSCI System Reset" + depends on ARM_PSCI_FW + help + Enable PSCI SYSTEM_RESET function call. To use this, PSCI firmware + must be running on your system. + +endif endmenu -- cgit v1.1