Commit 2502960f authored by Yong Wu's avatar Yong Wu Committed by Greg Kroah-Hartman
Browse files

component: Add common helper for compare/release functions 



The component requires the compare/release functions, there are so many
copies in current kernel. Just define four common helpers for them.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: default avatarYong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20220214060819.7334-2-yong.wu@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 36744c11

drivers/base/component.c

+58 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include <linux/device.h>

#include <linux/list.h>

#include <linux/mutex.h>

#include <linux/of.h>

#include <linux/slab.h>

#include <linux/debugfs.h>
@@ -283,6 +284,63 @@ static void take_down_aggregate_device(struct aggregate_device *adev) 
	}

}



/**

 * component_compare_of - A common component compare function for of_node

 * @dev: component device

 * @data: @compare_data from component_match_add_release()

 *

 * A common compare function when compare_data is device of_node. e.g.

 * component_match_add_release(masterdev, &match, component_release_of,

 * component_compare_of, component_dev_of_node)

 */

int component_compare_of(struct device *dev, void *data)

{

	return device_match_of_node(dev, data);

}

EXPORT_SYMBOL_GPL(component_compare_of);



/**

 * component_release_of - A common component release function for of_node

 * @dev: component device

 * @data: @compare_data from component_match_add_release()

 *

 * About the example, Please see component_compare_of().

 */

void component_release_of(struct device *dev, void *data)

{

	of_node_put(data);

}

EXPORT_SYMBOL_GPL(component_release_of);



/**

 * component_compare_dev - A common component compare function for dev

 * @dev: component device

 * @data: @compare_data from component_match_add_release()

 *

 * A common compare function when compare_data is struce device. e.g.

 * component_match_add(masterdev, &match, component_compare_dev, component_dev)

 */

int component_compare_dev(struct device *dev, void *data)

{

	return dev == data;

}

EXPORT_SYMBOL_GPL(component_compare_dev);



/**

 * component_compare_dev_name - A common component compare function for device name

 * @dev: component device

 * @data: @compare_data from component_match_add_release()

 *

 * A common compare function when compare_data is device name string. e.g.

 * component_match_add(masterdev, &match, component_compare_dev_name,

 * "component_dev_name")

 */

int component_compare_dev_name(struct device *dev, void *data)

{

	return device_match_name(dev, data);

}

EXPORT_SYMBOL_GPL(component_compare_dev_name);



static void devm_component_match_release(struct device *parent, void *res)

{

	struct component_match *match = res;

include/linux/component.h

+6 −0
Original line number Diff line number Diff line
@@ -82,6 +82,12 @@ struct component_master_ops { 
	void (*unbind)(struct device *master);

};



/* A set helper functions for component compare/release */

int component_compare_of(struct device *dev, void *data);

void component_release_of(struct device *dev, void *data);

int component_compare_dev(struct device *dev, void *data);

int component_compare_dev_name(struct device *dev, void *data);



void component_master_del(struct device *,

	const struct component_master_ops *);