mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Shaohua Li](/assets/img/avatar_default.png)
allow sysdev_class adding attribute. Next patch will use the new API to add an attribute under /sys/device/system/cpu/. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/**
|
|
* System devices follow a slightly different driver model.
|
|
* They don't need to do dynammic driver binding, can't be probed,
|
|
* and don't reside on any type of peripheral bus.
|
|
* So, we represent and treat them a little differently.
|
|
*
|
|
* We still have a notion of a driver for a system device, because we still
|
|
* want to perform basic operations on these devices.
|
|
*
|
|
* We also support auxillary drivers binding to devices of a certain class.
|
|
*
|
|
* This allows configurable drivers to register themselves for devices of
|
|
* a certain type. And, it allows class definitions to reside in generic
|
|
* code while arch-specific code can register specific drivers.
|
|
*
|
|
* Auxillary drivers registered with a NULL cls are registered as drivers
|
|
* for all system devices, and get notification calls for each device.
|
|
*/
|
|
|
|
|
|
#ifndef _SYSDEV_H_
|
|
#define _SYSDEV_H_
|
|
|
|
#include <linux/kobject.h>
|
|
#include <linux/pm.h>
|
|
|
|
|
|
struct sys_device;
|
|
|
|
struct sysdev_class {
|
|
struct list_head drivers;
|
|
|
|
/* Default operations for these types of devices */
|
|
int (*shutdown)(struct sys_device *);
|
|
int (*suspend)(struct sys_device *, pm_message_t state);
|
|
int (*resume)(struct sys_device *);
|
|
struct kset kset;
|
|
};
|
|
|
|
struct sysdev_class_attribute {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct sysdev_class *, char *);
|
|
ssize_t (*store)(struct sysdev_class *, const char *, size_t);
|
|
};
|
|
|
|
#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
|
|
struct sysdev_class_attribute attr_##_name = { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
};
|
|
|
|
|
|
extern int sysdev_class_register(struct sysdev_class *);
|
|
extern void sysdev_class_unregister(struct sysdev_class *);
|
|
|
|
extern int sysdev_class_create_file(struct sysdev_class *,
|
|
struct sysdev_class_attribute *);
|
|
extern void sysdev_class_remove_file(struct sysdev_class *,
|
|
struct sysdev_class_attribute *);
|
|
/**
|
|
* Auxillary system device drivers.
|
|
*/
|
|
|
|
struct sysdev_driver {
|
|
struct list_head entry;
|
|
int (*add)(struct sys_device *);
|
|
int (*remove)(struct sys_device *);
|
|
int (*shutdown)(struct sys_device *);
|
|
int (*suspend)(struct sys_device *, pm_message_t state);
|
|
int (*resume)(struct sys_device *);
|
|
};
|
|
|
|
|
|
extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *);
|
|
extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *);
|
|
|
|
|
|
/**
|
|
* sys_devices can be simplified a lot from regular devices, because they're
|
|
* simply not as versatile.
|
|
*/
|
|
|
|
struct sys_device {
|
|
u32 id;
|
|
struct sysdev_class * cls;
|
|
struct kobject kobj;
|
|
};
|
|
|
|
extern int sysdev_register(struct sys_device *);
|
|
extern void sysdev_unregister(struct sys_device *);
|
|
|
|
|
|
struct sysdev_attribute {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct sys_device *, char *);
|
|
ssize_t (*store)(struct sys_device *, const char *, size_t);
|
|
};
|
|
|
|
|
|
#define SYSDEV_ATTR(_name,_mode,_show,_store) \
|
|
struct sysdev_attribute attr_##_name = { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
};
|
|
|
|
extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
|
|
extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
|
|
|
|
#endif /* _SYSDEV_H_ */
|