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@xxxxxxxxxx>
---
arch/mips/include/asm/idle.h | 14 ++++++++++++++
arch/mips/kernel/idle.c | 11 +++++++++++
2 files changed, 25 insertions(+)
diff --git a/arch/mips/include/asm/idle.h b/arch/mips/include/asm/idle.h
index d192158..d9f932d 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 837ff27..2879e2e 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
--
1.8.5.3
