132 строки
4.4 KiB
C
132 строки
4.4 KiB
C
/* 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 {
|
|
/**
|
|
* @bind:
|
|
*
|
|
* Called through component_bind_all() when the aggregate driver is
|
|
* ready to bind the overall driver.
|
|
*/
|
|
int (*bind)(struct device *comp, struct device *master,
|
|
void *master_data);
|
|
/**
|
|
* @unbind:
|
|
*
|
|
* Called through component_unbind_all() when the aggregate driver is
|
|
* ready to bind the overall driver, or when component_bind_all() fails
|
|
* part-ways through and needs to unbind some already bound components.
|
|
*/
|
|
void (*unbind)(struct device *comp, struct device *master,
|
|
void *master_data);
|
|
};
|
|
|
|
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 {
|
|
/**
|
|
* @bind:
|
|
*
|
|
* Called when all components or the aggregate driver, as specified in
|
|
* the match list passed to component_master_add_with_match(), are
|
|
* ready. Usually there are 3 steps to bind an aggregate driver:
|
|
*
|
|
* 1. Allocate a structure for the aggregate driver.
|
|
*
|
|
* 2. Bind all components to the aggregate driver by calling
|
|
* component_bind_all() with the aggregate driver structure as opaque
|
|
* pointer data.
|
|
*
|
|
* 3. Register the aggregate driver with the subsystem to publish its
|
|
* interfaces.
|
|
*
|
|
* Note that the lifetime of the aggregate driver does not align with
|
|
* any of the underlying &struct device instances. Therefore devm cannot
|
|
* be used and all resources acquired or allocated in this callback must
|
|
* be explicitly released in the @unbind callback.
|
|
*/
|
|
int (*bind)(struct device *master);
|
|
/**
|
|
* @unbind:
|
|
*
|
|
* Called when either the aggregate driver, using
|
|
* component_master_del(), or one of its components, using
|
|
* component_del(), is unregistered.
|
|
*/
|
|
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 *);
|
|
|
|
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)
|
|
{
|
|
component_match_add_release(parent, matchptr, NULL, compare,
|
|
compare_data);
|
|
}
|
|
|
|
#endif
|