thermal: devfreq_cooling: add new registration functions with Energy Model (84e0d87c) · Commits · 戴 / test

drivers/thermal/devfreq_cooling.c

+53 −1

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@

		#include <linux/devfreq.h>
		#include <linux/devfreq_cooling.h>
		#include <linux/energy_model.h>
		#include <linux/export.h>
		#include <linux/idr.h>
		#include <linux/slab.h>
		@@ -576,22 +577,73 @@ struct thermal_cooling_device devfreq_cooling_register(struct devfreq df)
		}
		EXPORT_SYMBOL_GPL(devfreq_cooling_register);

		/**
		* devfreq_cooling_em_register_power() - Register devfreq cooling device with
		* power information and automatically register Energy Model (EM)
		* @df: Pointer to devfreq device.
		* @dfc_power: Pointer to devfreq_cooling_power.
		*
		* Register a devfreq cooling device and automatically register EM. The
		* available OPPs must be registered for the device.
		*
		* If @dfc_power is provided, the cooling device is registered with the
		* power extensions. It is using the simple Energy Model which requires
		* "dynamic-power-coefficient" a devicetree property. To not break drivers
		* which miss that DT property, the function won't bail out when the EM
		* registration failed. The cooling device will be registered if everything
		* else is OK.
		*/
		struct thermal_cooling_device *
		devfreq_cooling_em_register(struct devfreq *df,
		struct devfreq_cooling_power *dfc_power)
		{
		struct thermal_cooling_device *cdev;
		struct device *dev;
		int ret;

		if (IS_ERR_OR_NULL(df))
		return ERR_PTR(-EINVAL);

		dev = df->dev.parent;

		ret = dev_pm_opp_of_register_em(dev, NULL);
		if (ret)
		dev_dbg(dev, "Unable to register EM for devfreq cooling device (%d)\n",
		ret);

		cdev = of_devfreq_cooling_register_power(dev->of_node, df, dfc_power);

		if (IS_ERR_OR_NULL(cdev))
		em_dev_unregister_perf_domain(dev);

		return cdev;
		}
		EXPORT_SYMBOL_GPL(devfreq_cooling_em_register);

		/**
		* devfreq_cooling_unregister() - Unregister devfreq cooling device.
		* @cdev: Pointer to devfreq cooling device to unregister.
		*
		* Unregisters devfreq cooling device and related Energy Model if it was
		* present.
		*/
		void devfreq_cooling_unregister(struct thermal_cooling_device *cdev)
		{
		struct devfreq_cooling_device *dfc;
		struct device *dev;

		if (!cdev)
		if (IS_ERR_OR_NULL(cdev))
		return;

		dfc = cdev->devdata;
		dev = dfc->devfreq->dev.parent;

		thermal_cooling_device_unregister(dfc->cdev);
		ida_simple_remove(&devfreq_ida, dfc->id);
		dev_pm_qos_remove_request(&dfc->req_max_freq);

		em_dev_unregister_perf_domain(dev);

		kfree(dfc->power_table);
		kfree(dfc->freq_table);

include/linux/devfreq_cooling.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -65,6 +65,9 @@ struct thermal_cooling_device *
		of_devfreq_cooling_register(struct device_node np, struct devfreq df);
		struct thermal_cooling_device devfreq_cooling_register(struct devfreq df);
		void devfreq_cooling_unregister(struct thermal_cooling_device *dfc);
		struct thermal_cooling_device *
		devfreq_cooling_em_register(struct devfreq *df,
		struct devfreq_cooling_power *dfc_power);

		#else /* !CONFIG_DEVFREQ_THERMAL */

		@@ -87,6 +90,13 @@ devfreq_cooling_register(struct devfreq *df)
		return ERR_PTR(-EINVAL);
		}

		static inline struct thermal_cooling_device *
		devfreq_cooling_em_register(struct devfreq *df,
		struct devfreq_cooling_power *dfc_power)
		{
		return ERR_PTR(-EINVAL);
		}

		static inline void
		devfreq_cooling_unregister(struct thermal_cooling_device *dfc)
		{

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