diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:18:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:19:04 +0200 |
| commit | 6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e (patch) | |
| tree | 021cc9f6b477146fcebe6f3be4752abfa2ba18a9 /arch/arm/plat-s3c24xx/cpu.c | |
| parent | 682968e0c425c60f0dde37977e5beb2b12ddc4cc (diff) | |
| parent | a385ec4f11bdcf81af094c03e2444ee9b7fad2e5 (diff) | |
Merge branch 'perf/core' into perf/uprobes
Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/plat-s3c24xx/cpu.c')
| -rw-r--r-- | arch/arm/plat-s3c24xx/cpu.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c index 21f1fda8b661..290942d9adda 100644 --- a/arch/arm/plat-s3c24xx/cpu.c +++ b/arch/arm/plat-s3c24xx/cpu.c @@ -32,8 +32,11 @@ #include <linux/io.h> #include <mach/hardware.h> +#include <mach/regs-clock.h> #include <asm/irq.h> #include <asm/cacheflush.h> +#include <asm/system_info.h> +#include <asm/system_misc.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> @@ -190,8 +193,34 @@ static unsigned long s3c24xx_read_idcode_v4(void) return __raw_readl(S3C2410_GSTATUS1); } +static void s3c24xx_default_idle(void) +{ + unsigned long tmp; + int i; + + /* idle the system by using the idle mode which will wait for an + * interrupt to happen before restarting the system. + */ + + /* Warning: going into idle state upsets jtag scanning */ + + __raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE, + S3C2410_CLKCON); + + /* the samsung port seems to do a loop and then unset idle.. */ + for (i = 0; i < 50; i++) + tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */ + + /* this bit is not cleared on re-start... */ + + __raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE, + S3C2410_CLKCON); +} + void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) { + arm_pm_idle = s3c24xx_default_idle; + /* initialise the io descriptors we need for initialisation */ iotable_init(mach_desc, size); iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); |