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ARM: tegra: cpuquiet: Notify the cpuquiet governor when the driver is busy

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Added generic busy/free notifiers that the driver can invoke to let the
governor know that it cannot process further core online/offline
requests (invoked in our case whenever we switch to the LP cluster).

Change-Id: I5e3f7f28f38806a7f87050e8d0c8d2f2cf7521aa
Signed-off-by: Sai Charan Gurrappadi <sgurrappadi@nvidia.com>
Reviewed-on: http://git-master/r/114807
Reviewed-by: Lokesh Pathak <lpathak@nvidia.com>
Tested-by: Lokesh Pathak <lpathak@nvidia.com>
This commit is contained in:
Sai Charan Gurrappadi
2012-07-10 17:33:58 -07:00
committed by Huang, Tao
parent 6856f09610
commit 904aa6c75f
2 changed files with 18 additions and 0 deletions
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14
drivers/cpuquiet/governor.c
View File

@@ -100,3 +100,17 @@ void cpuquiet_unregister_governor(struct cpuquiet_governor *gov)
list_del(&gov->governor_list);
mutex_unlock(&cpuquiet_lock);
}
void cpuquiet_device_busy(void)
{
if (cpuquiet_curr_governor &&
cpuquiet_curr_governor->device_busy_notification)
cpuquiet_curr_governor->device_busy_notification();
}
void cpuquiet_device_free(void)
{
if (cpuquiet_curr_governor &&
cpuquiet_curr_governor->device_free_notification)
cpuquiet_curr_governor->device_free_notification();
}

4
include/linux/cpuquiet.h
View File

@@ -30,6 +30,8 @@ struct cpuquiet_governor {
int (*start) (void);
void (*stop) (void);
int (*store_active) (unsigned int cpu, bool active);
void (*device_free_notification) (void);
void (*device_busy_notification) (void);
struct module *owner;
};
@@ -47,6 +49,8 @@ extern int cpuquiet_register_driver(struct cpuquiet_driver *drv);
extern void cpuquiet_unregister_driver(struct cpuquiet_driver *drv);
extern int cpuquiet_add_group(struct attribute_group *attrs);
extern void cpuquiet_remove_group(struct attribute_group *attrs);
extern void cpuquiet_device_busy(void);
extern void cpuquiet_device_free(void);
int cpuquiet_kobject_init(struct kobject *kobj, struct kobj_type *type,
char *name);
extern unsigned int nr_cluster_ids;