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>
diff --git a/arch/arm/mach-exynos4/hotplug.c b/arch/arm/mach-exynos4/hotplug.c
index 2b5909e..7490789 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 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
*/