Merge tag 'sunxi-fixes-for-4.3' of https://git.kernel.org/pub/scm/linux/kernel/git...

[linux-drm-fsl-dcu.git] / drivers / thermal / thermal_core.c

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 5e5fc7015c7f8da4ba283287acdae8269733b373..d9e525cc9c1ce24bcd9d55dd59730f375b15d552 100644 (file)
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1012,6 +1012,34 @@ int power_actor_get_max_power(struct thermal_cooling_device *cdev,
        return cdev->ops->state2power(cdev, tz, 0, max_power);
 }
 
+/**
+ * power_actor_get_min_power() - get the mainimum power that a cdev can consume
+ * @cdev:      pointer to &thermal_cooling_device
+ * @tz:                a valid thermal zone device pointer
+ * @min_power: pointer in which to store the minimum power
+ *
+ * Calculate the minimum power consumption in milliwatts that the
+ * cooling device can currently consume and store it in @min_power.
+ *
+ * Return: 0 on success, -EINVAL if @cdev doesn't support the
+ * power_actor API or -E* on other error.
+ */
+int power_actor_get_min_power(struct thermal_cooling_device *cdev,
+                             struct thermal_zone_device *tz, u32 *min_power)
+{
+       unsigned long max_state;
+       int ret;
+
+       if (!cdev_is_power_actor(cdev))
+               return -EINVAL;
+
+       ret = cdev->ops->get_max_state(cdev, &max_state);
+       if (ret)
+               return ret;
+
+       return cdev->ops->state2power(cdev, tz, max_state, min_power);
+}
+
 /**
  * power_actor_set_power() - limit the maximum power that a cooling device can consume
  * @cdev:      pointer to &thermal_cooling_device