component.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef COMPONENT_H
#define COMPONENT_H

#include <linux/stddef.h>


struct device;

/**
 * struct component_ops - callbacks for component drivers
 *
 * Components are registered with component_add() and unregistered with
 * component_del().
 */
struct component_ops { … };

int component_add(struct device *, const struct component_ops *);
int component_add_typed(struct device *dev, const struct component_ops *ops,
	int subcomponent);
void component_del(struct device *, const struct component_ops *);

int component_bind_all(struct device *parent, void *data);
void component_unbind_all(struct device *parent, void *data);

struct aggregate_device;

/**
 * struct component_master_ops - callback for the aggregate driver
 *
 * Aggregate drivers are registered with component_master_add_with_match() and
 * unregistered with component_master_del().
 */
struct component_master_ops { … };

/* 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 *);

struct component_match;

int component_master_add_with_match(struct device *,
	const struct component_master_ops *, struct component_match *);
void component_match_add_release(struct device *parent,
	struct component_match **matchptr,
	void (*release)(struct device *, void *),
	int (*compare)(struct device *, void *), void *compare_data);
void component_match_add_typed(struct device *parent,
	struct component_match **matchptr,
	int (*compare_typed)(struct device *, int, void *), void *compare_data);

/**
 * component_match_add - add a component match entry
 * @parent: device with the aggregate driver
 * @matchptr: pointer to the list of component matches
 * @compare: compare function to match against all components
 * @compare_data: opaque pointer passed to the @compare function
 *
 * Adds a new component match to the list stored in @matchptr, which the @parent
 * aggregate driver needs to function. The list of component matches pointed to
 * by @matchptr must be initialized to NULL before adding the first match. This
 * only matches against components added with component_add().
 *
 * The allocated match list in @matchptr is automatically released using devm
 * actions.
 *
 * See also component_match_add_release() and component_match_add_typed().
 */
static inline void component_match_add(struct device *parent,
	struct component_match **matchptr,
	int (*compare)(struct device *, void *), void *compare_data)
{ … }

#endif
linux/include/linux/component.h
