Merge tag 'devfreq-next-for-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux

Pull devfreq updates for 6.2 from Chanwoo Choi:

"- Add a private governor_data for governor.

  The private governor_data is allocated and handled by governor
  regardless of passing the data from devfreq driver via
  devfreq_add_device. The added private governor data keeps the
  governor own data when switching from userspace
  governor and other governors.

- Replace code by using defined functions of
  device_match_of_node() and devm_platform_get_and_ioremap_resource()."

* tag 'devfreq-next-for-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux:
  PM / devfreq: event: use devm_platform_get_and_ioremap_resource()
  PM / devfreq: event: Use device_match_of_node()
  PM / devfreq: Use device_match_of_node()
  PM/devfreq: governor: Add a private governor_data for governor

Author: rafaeljw

drivers/devfreq/devfreq-event.c

@@ -233,7 +233,7 @@ struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
 
 	mutex_lock(&devfreq_event_list_lock);
 	list_for_each_entry(edev, &devfreq_event_list, node) {
-		if (edev->dev.parent && edev->dev.parent->of_node == node)
+		if (edev->dev.parent && device_match_of_node(edev->dev.parent, node))
 			goto out;
 	}
 

drivers/devfreq/devfreq.c

@@ -776,8 +776,7 @@ static void remove_sysfs_files(struct devfreq *devfreq,
  * @dev:	the device to add devfreq feature.
  * @profile:	device-specific profile to run devfreq.
  * @governor_name:	name of the policy to choose frequency.
- * @data:	private data for the governor. The devfreq framework does not
- *		touch this value.
+ * @data:	devfreq driver pass to governors, governor should not change it.
  */
 struct devfreq *devfreq_add_device(struct device *dev,
 				   struct devfreq_dev_profile *profile,
@@ -1011,8 +1010,7 @@ static void devm_devfreq_dev_release(struct device *dev, void *res)
  * @dev:	the device to add devfreq feature.
  * @profile:	device-specific profile to run devfreq.
  * @governor_name:	name of the policy to choose frequency.
- * @data:	private data for the governor. The devfreq framework does not
- *		touch this value.
+ * @data:	 devfreq driver pass to governors, governor should not change it.
  *
  * This function manages automatically the memory of devfreq device using device
  * resource management and simplify the free operation for memory of devfreq
@@ -1059,7 +1057,7 @@ struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node)
 	mutex_lock(&devfreq_list_lock);
 	list_for_each_entry(devfreq, &devfreq_list, node) {
 		if (devfreq->dev.parent
-			&& devfreq->dev.parent->of_node == node) {
+			&& device_match_of_node(devfreq->dev.parent, node)) {
 			mutex_unlock(&devfreq_list_lock);
 			return devfreq;
 		}

drivers/devfreq/event/exynos-nocp.c

@@ -214,8 +214,7 @@ static int exynos_nocp_parse_dt(struct platform_device *pdev,
 		nocp->clk = NULL;
 
 	/* Maps the memory mapped IO to control nocp register */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(dev, res);
+	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 

drivers/devfreq/governor_userspace.c

@@ -21,7 +21,7 @@ struct userspace_data {
 
 static int devfreq_userspace_func(struct devfreq *df, unsigned long *freq)
 {
-	struct userspace_data *data = df->data;
+	struct userspace_data *data = df->governor_data;
 
 	if (data->valid)
 		*freq = data->user_frequency;
@@ -40,7 +40,7 @@ static ssize_t set_freq_store(struct device *dev, struct device_attribute *attr,
 	int err = 0;
 
 	mutex_lock(&devfreq->lock);
-	data = devfreq->data;
+	data = devfreq->governor_data;
 
 	sscanf(buf, "%lu", &wanted);
 	data->user_frequency = wanted;
@@ -60,7 +60,7 @@ static ssize_t set_freq_show(struct device *dev,
 	int err = 0;
 
 	mutex_lock(&devfreq->lock);
-	data = devfreq->data;
+	data = devfreq->governor_data;
 
 	if (data->valid)
 		err = sprintf(buf, "%lu\n", data->user_frequency);
@@ -91,7 +91,7 @@ static int userspace_init(struct devfreq *devfreq)
 		goto out;
 	}
 	data->valid = false;
-	devfreq->data = data;
+	devfreq->governor_data = data;
 
 	err = sysfs_create_group(&devfreq->dev.kobj, &dev_attr_group);
 out:
@@ -107,8 +107,8 @@ static void userspace_exit(struct devfreq *devfreq)
 	if (devfreq->dev.kobj.sd)
 		sysfs_remove_group(&devfreq->dev.kobj, &dev_attr_group);
 
-	kfree(devfreq->data);
-	devfreq->data = NULL;
+	kfree(devfreq->governor_data);
+	devfreq->governor_data = NULL;
 }
 
 static int devfreq_userspace_handler(struct devfreq *devfreq,

include/linux/devfreq.h

@@ -152,8 +152,8 @@ struct devfreq_stats {
  * @max_state:		count of entry present in the frequency table.
  * @previous_freq:	previously configured frequency value.
  * @last_status:	devfreq user device info, performance statistics
- * @data:	Private data of the governor. The devfreq framework does not
- *		touch this.
+ * @data:	devfreq driver pass to governors, governor should not change it.
+ * @governor_data:	private data for governors, devfreq core doesn't touch it.
  * @user_min_freq_req:	PM QoS minimum frequency request from user (via sysfs)
  * @user_max_freq_req:	PM QoS maximum frequency request from user (via sysfs)
  * @scaling_min_freq:	Limit minimum frequency requested by OPP interface
@@ -193,7 +193,8 @@ struct devfreq {
 	unsigned long previous_freq;
 	struct devfreq_dev_status last_status;
 
-	void *data; /* private data for governors */
+	void *data;
+	void *governor_data;
 
 	struct dev_pm_qos_request user_min_freq_req;
 	struct dev_pm_qos_request user_max_freq_req;