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| author |   Paul Burton <paul.burton@imgtec.com> | 2014-04-14 16:16:41 +0100 |
|---|---|---|
| committer | Paul Burton <paul.burton@imgtec.com> | 2014-05-28 16:20:34 +0100 |
| commit | da9f970fdd55a018ab97ec2d25653756407bdaaf (patch) | |
| tree | 5f2cfee935680a9c819b33d1514620c152674a7f /arch | |
| parent | MIPS: smp-cps: duplicate core0 CCA on secondary cores (diff) | |
| download | linux-dev-da9f970fdd55a018ab97ec2d25653756407bdaaf.tar.xz linux-dev-da9f970fdd55a018ab97ec2d25653756407bdaaf.zip | |
MIPS: cpuidle wait instruction state
Defines a macro intended to allow trivial use of the regular MIPS wait
instruction from cpuidle drivers, which may simply invoke the macro
within their array of states.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/include/asm/idle.h | 14 | ||||
| -rw-r--r-- | arch/mips/kernel/idle.c | 11 |
2 files changed, 25 insertions, 0 deletions
diff --git a/arch/mips/include/asm/idle.h b/arch/mips/include/asm/idle.h index d192158886b1..d9f932de80e9 100644 --- a/arch/mips/include/asm/idle.h +++ b/arch/mips/include/asm/idle.h @@ -1,6 +1,7 @@ #ifndef __ASM_IDLE_H #define __ASM_IDLE_H +#include <linux/cpuidle.h> #include <linux/linkage.h> extern void (*cpu_wait)(void); @@ -20,4 +21,17 @@ static inline int address_is_in_r4k_wait_irqoff(unsigned long addr) addr < (unsigned long)__pastwait; } +extern int mips_cpuidle_wait_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index); + +#define MIPS_CPUIDLE_WAIT_STATE {\ + .enter = mips_cpuidle_wait_enter,\ + .exit_latency = 1,\ + .target_residency = 1,\ + .power_usage = UINT_MAX,\ + .flags = CPUIDLE_FLAG_TIME_VALID,\ + .name = "wait",\ + .desc = "MIPS wait",\ +} + #endif /* __ASM_IDLE_H */ diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c index 837ff27950bc..2879e2ed5192 100644 --- a/arch/mips/kernel/idle.c +++ b/arch/mips/kernel/idle.c @@ -250,3 +250,14 @@ void arch_cpu_idle(void) else local_irq_enable(); } + +#ifdef CONFIG_CPU_IDLE + +int mips_cpuidle_wait_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) +{ + arch_cpu_idle(); + return index; +} + +#endif |