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| author | JungHi Min <junghi.min@samsung.com> | 2011-07-16 13:39:09 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-07-20 23:36:19 +0900 |
| commit | 911c29b0e5b299e39ed7875bb96906a9ef8617aa (patch) | |
| tree | cc2de5a43e2c5080c536ff6599cc65c9ee05675b /arch/arm/mach-exynos4/hotplug.c | |
| parent | 55981f7b3cc9885d300637ea590148db329cb741 (diff) | |
| download | op-kernel-dev-911c29b0e5b299e39ed7875bb96906a9ef8617aa.zip op-kernel-dev-911c29b0e5b299e39ed7875bb96906a9ef8617aa.tar.gz | |
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>
Diffstat (limited to 'arch/arm/mach-exynos4/hotplug.c')
| -rw-r--r-- | arch/arm/mach-exynos4/hotplug.c | 13 |
1 files changed, 8 insertions, 5 deletions
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 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 */ |
