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path: root/drivers/cpuidle/driver.c
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Diffstat (limited to 'drivers/cpuidle/driver.c')
-rw-r--r--drivers/cpuidle/driver.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index fcaf8b2bab96..c76423aaef4d 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -389,3 +389,31 @@ void cpuidle_driver_unref(void)
spin_unlock(&cpuidle_driver_lock);
}
+
+/**
+ * cpuidle_driver_state_disabled - Disable or enable an idle state
+ * @drv: cpuidle driver owning the state
+ * @idx: State index
+ * @disable: Whether or not to disable the state
+ */
+void cpuidle_driver_state_disabled(struct cpuidle_driver *drv, int idx,
+ bool disable)
+{
+ unsigned int cpu;
+
+ mutex_lock(&cpuidle_lock);
+
+ for_each_cpu(cpu, drv->cpumask) {
+ struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
+
+ if (!dev)
+ continue;
+
+ if (disable)
+ dev->states_usage[idx].disable |= CPUIDLE_STATE_DISABLED_BY_DRIVER;
+ else
+ dev->states_usage[idx].disable &= ~CPUIDLE_STATE_DISABLED_BY_DRIVER;
+ }
+
+ mutex_unlock(&cpuidle_lock);
+}