ARM: EXYNOS4: Add support Core1 Power On/Off with hotplug in/out

To insert the code for power on/off with pmu control to support hotplug in/out core1
As for hotplug.c, the codes for core1 to be hotplug in/out is inserted.
As for regs-pmu.h, S5P_CORE_LOCAL_PWR_EN is defined.
As for platsmp.c, the codes for core1 to be powered on is inserted.

Signed-off-by: JungHi Min <junghi.min@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/arch/arm/mach-exynos4/hotplug.c b/arch/arm/mach-exynos4/hotplug.c
index 2b5909e2ccd3..7490789784c9 100644
--- a/arch/arm/mach-exynos4/hotplug.c
+++ b/arch/arm/mach-exynos4/hotplug.c
@@ -13,9 +13,12 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/smp.h>
+#include <linux/io.h>
 
 #include <asm/cacheflush.h>
 
+#include <mach/regs-pmu.h>
+
 extern volatile int pen_release;
 
 static inline void cpu_enter_lowpower(void)
@@ -58,12 +61,12 @@ static inline void cpu_leave_lowpower(void)
 
 static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
 {
-        /*
-         * there is no power-control hardware on this platform, so all
-         * we can do is put the core into WFI; this is safe as the calling
-         * code will have already disabled interrupts
-         */
         for (;;) {
+
+                /* make cpu1 to be turned off at next WFI command */
+                if (cpu == 1)
+                        __raw_writel(0, S5P_ARM_CORE1_CONFIGURATION);
+
                 /*
                  * here's the WFI
                  */