socfpga: hotplug: put cpu1 in wfi
Use WFI when putting CPU1 to sleep. Don't hold CPU1 in reset
since that results in increased power consumption.
Reset CPU1 briefly during CPU1 bootup.
This has been tested for hotplug and suspend/resume and results
in no increased power consumption.
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Acked-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-socfpga/core.h b/arch/arm/mach-socfpga/core.h
index 60c443d..483cb46 100644
--- a/arch/arm/mach-socfpga/core.h
+++ b/arch/arm/mach-socfpga/core.h
@@ -21,6 +21,7 @@
#define __MACH_CORE_H
#define SOCFPGA_RSTMGR_CTRL 0x04
+#define SOCFPGA_RSTMGR_MODMPURST 0x10
#define SOCFPGA_RSTMGR_MODPERRST 0x14
#define SOCFPGA_RSTMGR_BRGMODRST 0x1c
@@ -28,6 +29,8 @@
#define RSTMGR_CTRL_SWCOLDRSTREQ 0x1 /* Cold Reset */
#define RSTMGR_CTRL_SWWARMRSTREQ 0x2 /* Warm Reset */
+#define RSTMGR_MPUMODRST_CPU1 0x2 /* CPU1 Reset */
+
extern void socfpga_secondary_startup(void);
extern void __iomem *socfpga_scu_base_addr;