cpuidle: support multiple drivers

[deliverable/linux.git] / drivers / cpuidle / cpuidle.c

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index ce4cac706dd163f3ff4fda3c8bcca4e2c24a983f..711dd83fd3ba4f8dd9b8ed586f8abacba3e796f5 100644 (file)
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -68,7 +68,7 @@ static cpuidle_enter_t cpuidle_enter_ops;
 int cpuidle_play_dead(void)
 {
        struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
-       struct cpuidle_driver *drv = cpuidle_get_driver();
+       struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
        int i, dead_state = -1;
        int power_usage = -1;
 
@@ -128,7 +128,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 int cpuidle_idle_call(void)
 {
        struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
-       struct cpuidle_driver *drv = cpuidle_get_driver();
+       struct cpuidle_driver *drv;
        int next_state, entered_state;
 
        if (off)
@@ -141,6 +141,8 @@ int cpuidle_idle_call(void)
        if (!dev || !dev->enabled)
                return -EBUSY;
 
+       drv = cpuidle_get_cpu_driver(dev);
+
        /* ask the governor for the next state */
        next_state = cpuidle_curr_governor->select(drv, dev);
        if (need_resched()) {
@@ -312,15 +314,19 @@ static void poll_idle_init(struct cpuidle_driver *drv) {}
 int cpuidle_enable_device(struct cpuidle_device *dev)
 {
        int ret, i;
-       struct cpuidle_driver *drv = cpuidle_get_driver();
+       struct cpuidle_driver *drv;
 
        if (!dev)
                return -EINVAL;
 
        if (dev->enabled)
                return 0;
+
+       drv = cpuidle_get_cpu_driver(dev);
+
        if (!drv || !cpuidle_curr_governor)
                return -EIO;
+
        if (!dev->state_count)
                dev->state_count = drv->state_count;
 
@@ -335,7 +341,8 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
 
        poll_idle_init(drv);
 
-       if ((ret = cpuidle_add_state_sysfs(dev)))
+       ret = cpuidle_add_device_sysfs(dev);
+       if (ret)
                return ret;
 
        if (cpuidle_curr_governor->enable &&
@@ -356,7 +363,7 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
        return 0;
 
 fail_sysfs:
-       cpuidle_remove_state_sysfs(dev);
+       cpuidle_remove_device_sysfs(dev);
 
        return ret;
 }
@@ -372,17 +379,20 @@ EXPORT_SYMBOL_GPL(cpuidle_enable_device);
  */
 void cpuidle_disable_device(struct cpuidle_device *dev)
 {
+       struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
+
        if (!dev || !dev->enabled)
                return;
-       if (!cpuidle_get_driver() || !cpuidle_curr_governor)
+
+       if (!drv || !cpuidle_curr_governor)
                return;
 
        dev->enabled = 0;
 
        if (cpuidle_curr_governor->disable)
-               cpuidle_curr_governor->disable(cpuidle_get_driver(), dev);
+               cpuidle_curr_governor->disable(drv, dev);
 
-       cpuidle_remove_state_sysfs(dev);
+       cpuidle_remove_device_sysfs(dev);
        enabled_devices--;
 }
 
@@ -398,9 +408,9 @@ EXPORT_SYMBOL_GPL(cpuidle_disable_device);
 static int __cpuidle_register_device(struct cpuidle_device *dev)
 {
        int ret;
-       struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
+       struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
 
-       if (!try_module_get(cpuidle_driver->owner))
+       if (!try_module_get(drv->owner))
                return -EINVAL;
 
        per_cpu(cpuidle_devices, dev->cpu) = dev;
@@ -421,7 +431,7 @@ err_coupled:
 err_sysfs:
        list_del(&dev->device_list);
        per_cpu(cpuidle_devices, dev->cpu) = NULL;
-       module_put(cpuidle_driver->owner);
+       module_put(drv->owner);
        return ret;
 }
 
@@ -460,7 +470,7 @@ EXPORT_SYMBOL_GPL(cpuidle_register_device);
  */
 void cpuidle_unregister_device(struct cpuidle_device *dev)
 {
-       struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
+       struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
 
        if (dev->registered == 0)
                return;
@@ -477,7 +487,7 @@ void cpuidle_unregister_device(struct cpuidle_device *dev)
 
        cpuidle_resume_and_unlock();
 
-       module_put(cpuidle_driver->owner);
+       module_put(drv->owner);
 }
 
 EXPORT_SYMBOL_GPL(cpuidle_unregister_device);