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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/linux/devfreq-event.h
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@@ -1,12 +1,9 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * devfreq-event: a framework to provide raw data and events of devfreq devices
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  *
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  * Copyright (C) 2014 Samsung Electronics
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  * Author: Chanwoo Choi <cw00.choi@samsung.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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8
 
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 #ifndef __LINUX_DEVFREQ_EVENT_H__
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@@ -81,14 +78,20 @@
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  * struct devfreq_event_desc - the descriptor of devfreq-event device
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  *
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  * @name	: the name of devfreq-event device.
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+ * @event_type	: the type of the event determined and used by driver
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  * @driver_data	: the private data for devfreq-event driver.
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  * @ops		: the operation to control devfreq-event device.
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  *
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  * Each devfreq-event device is described with a this structure.
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  * This structure contains the various data for devfreq-event device.
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+ * The event_type describes what is going to be counted in the register.
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+ * It might choose to count e.g. read requests, write data in bytes, etc.
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+ * The full supported list of types is present in specyfic header in:
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+ * include/dt-bindings/pmu/.
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  */
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 struct devfreq_event_desc {
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 	const char *name;
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+	u32 event_type;
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 	void *driver_data;
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 	const struct devfreq_event_ops *ops;
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@@ -103,8 +106,11 @@
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 				struct devfreq_event_data *edata);
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 extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
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 extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
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-				struct device *dev, int index);
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-extern int devfreq_event_get_edev_count(struct device *dev);
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+				struct device *dev,
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+				const char *phandle_name,
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+				int index);
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+extern int devfreq_event_get_edev_count(struct device *dev,
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+				const char *phandle_name);
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 extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
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 				struct devfreq_event_desc *desc);
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 extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
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@@ -149,12 +155,15 @@
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 }
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 static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
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-					struct device *dev, int index)
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+					struct device *dev,
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+					const char *phandle_name,
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+					int index)
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 {
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 	return ERR_PTR(-EINVAL);
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 }
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-static inline int devfreq_event_get_edev_count(struct device *dev)
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+static inline int devfreq_event_get_edev_count(struct device *dev,
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+					const char *phandle_name)
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 {
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 	return -EINVAL;
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 }