The tegra3 and big.LITTLE architecture have different cpu latencies.
This API allows to specify a different cpu latency for a specific cpu.
With the previous patches, we use the per cpuidle device states pointer,
this function overrides this pointer.
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
drivers/cpuidle/cpuidle.c | 17 +++++++++++++++++
include/linux/cpuidle.h | 10 +++++++---
2 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 199878a..3b21b68 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -456,6 +456,23 @@ void cpuidle_unregister_device(struct cpuidle_device *dev)
EXPORT_SYMBOL_GPL(cpuidle_unregister_device);
+int cpuidle_register_states(struct cpuidle_device *dev,
+ struct cpuidle_state *states,
+ int state_count)
+{
+ if (!dev || !states)
+ return -EINVAL;
+
+ if (state_count <= 0)
+ return -EINVAL;
+
+ dev->states = states;
+ dev->state_count = state_count;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpuidle_register_state);
+
#ifdef CONFIG_SMP
static void smp_callback(void *v)
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 40a04a1..425200d 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -144,7 +144,9 @@ extern void cpuidle_driver_unref(void);
extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
extern int cpuidle_register_device(struct cpuidle_device *dev);
extern void cpuidle_unregister_device(struct cpuidle_device *dev);
-
+extern int cpuidle_register_states(struct cpuidle_device *dev,
+ struct cpuidle_state *states,
+ int state_count);
extern void cpuidle_pause_and_lock(void);
extern void cpuidle_resume_and_unlock(void);
extern void cpuidle_pause(void);
@@ -156,7 +158,6 @@ extern int cpuidle_wrap_enter(struct cpuidle_device *dev,
int (*enter)(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index));
extern int cpuidle_play_dead(void);
-
#else
static inline void disable_cpuidle(void) { }
static inline int cpuidle_idle_call(void) { return -ENODEV; }
@@ -169,7 +170,10 @@ static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
static inline int cpuidle_register_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
-
+static inline int cpuidle_register_states(struct cpuidle_device *dev,
+ struct cpuidle_state *states,
+ int state_count)
+{ return -ENODEV; }
static inline void cpuidle_pause_and_lock(void) { }
static inline void cpuidle_resume_and_unlock(void) { }
static inline void cpuidle_pause(void) { }
--
1.7.5.4
--
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