[PATCH] ARM: add Kconfig option for PSCI 0.1

[Icenowy Zheng]

We still have some platforms that only implements functionalities in
PSCI 0.1 (e.g. Allwinner ARMv7 SoCs).

Add a Kconfig option for exporting only PSCI 0.1. The code to export
PSCI 0.1 is still available and gets activated by this patch.

In addition, default ARCH_SUNXI U-Boot PSCI implementation to export
PSCI 0.1, to fix poweroff/reboot regression on Allwinner multi-core
ARMv7 SoCs.

Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
---
 arch/arm/cpu/armv7/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/cpu/armv7/Kconfig b/arch/arm/cpu/armv7/Kconfig
index 8eee801dce..60bb0a9e1e 100644
--- a/arch/arm/cpu/armv7/Kconfig
+++ b/arch/arm/cpu/armv7/Kconfig
@@ -44,6 +44,7 @@ config ARMV7_PSCI
 choice
 	prompt "Supported PSCI version"
 	depends on ARMV7_PSCI
+	default ARMV7_PSCI_0_1 if ARCH_SUNXI
 	default ARMV7_PSCI_1_0
 	help
 	  Select the supported PSCI version.
@@ -53,6 +54,9 @@ config ARMV7_PSCI_1_0
 
 config ARMV7_PSCI_0_2
 	bool "PSCI V0.2"
+
+config ARMV7_PSCI_0_1
+	bool "PSCI V0.1"
 endchoice
 
 config ARMV7_PSCI_NR_CPUS
-- 
2.27.0