Exemple #1
0
static int __init cpuidle_init(void)
{
	int ret;

	if (cpuidle_disabled())
		return -ENODEV;

	ret = cpuidle_add_interface(cpu_subsys.dev_root);
	if (ret)
		return ret;

	latency_notifier_init(&cpuidle_latency_notifier);

	return 0;
}
/**
 * cpuidle_init - core initializer
 */
static int __init cpuidle_init(void)
{
	int ret;

	if (cpuidle_disabled())
		return -ENODEV;

	ret = cpuidle_add_class_sysfs(&cpu_sysdev_class);
	if (ret)
		return ret;

	latency_notifier_init(&cpuidle_latency_notifier);

	return 0;
}
Exemple #3
0
/**
 * cpuidle_register_driver - registers a driver
 * @drv: the driver
 */
int cpuidle_register_driver(struct cpuidle_driver *drv)
{
	if (!drv || !drv->state_count)
		return -EINVAL;

	if (cpuidle_disabled())
		return -ENODEV;

	spin_lock(&cpuidle_driver_lock);
	if (cpuidle_curr_driver) {
		spin_unlock(&cpuidle_driver_lock);
		return -EBUSY;
	}
	cpuidle_curr_driver = drv;
	spin_unlock(&cpuidle_driver_lock);

	return 0;
}
/**
 * cpuidle_register_governor - registers a governor
 * @gov: the governor
 */
int cpuidle_register_governor(struct cpuidle_governor *gov)
{
	int ret = -EEXIST;

	if (!gov || !gov->select)
		return -EINVAL;

	if (cpuidle_disabled())
		return -ENODEV;

	mutex_lock(&cpuidle_lock);
	if (__cpuidle_find_governor(gov->name) == NULL) {
		ret = 0;
		pax_list_add_tail((struct list_head *)&gov->governor_list, &cpuidle_governors);
		if (!cpuidle_curr_governor ||
		    cpuidle_curr_governor->rating < gov->rating)
			cpuidle_switch_governor(gov);
	}
	mutex_unlock(&cpuidle_lock);

	return ret;
}