mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-30 16:13:54 +08:00
9800794ac1
This adds a new sysdev_ext_attribute that stores a pointer to the variable it manages and some utility functions/macro to easily use them. Previously all users wrote custom macros to generate show/store functions for each variable, with this it is possible to avoid that in many cases. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
157 lines
4.6 KiB
C
157 lines
4.6 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/module.h>
|
|
#include <linux/pm.h>
|
|
|
|
|
|
struct sys_device;
|
|
|
|
struct sysdev_class {
|
|
const char *name;
|
|
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) \
|
|
{ \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
|
|
struct sysdev_class_attribute attr_##_name = \
|
|
_SYSDEV_CLASS_ATTR(_name,_mode,_show,_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 *, struct sysdev_attribute *, char *);
|
|
ssize_t (*store)(struct sys_device *, struct sysdev_attribute *,
|
|
const char *, size_t);
|
|
};
|
|
|
|
|
|
#define _SYSDEV_ATTR(_name, _mode, _show, _store) \
|
|
{ \
|
|
.attr = { .name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define SYSDEV_ATTR(_name, _mode, _show, _store) \
|
|
struct sysdev_attribute attr_##_name = \
|
|
_SYSDEV_ATTR(_name, _mode, _show, _store);
|
|
|
|
extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
|
|
extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
|
|
|
|
struct sysdev_ext_attribute {
|
|
struct sysdev_attribute attr;
|
|
void *var;
|
|
};
|
|
|
|
/*
|
|
* Support for simple variable sysdev attributes.
|
|
* The pointer to the variable is stored in a sysdev_ext_attribute
|
|
*/
|
|
|
|
/* Add more types as needed */
|
|
|
|
extern ssize_t sysdev_show_ulong(struct sys_device *, struct sysdev_attribute *,
|
|
char *);
|
|
extern ssize_t sysdev_store_ulong(struct sys_device *,
|
|
struct sysdev_attribute *, const char *, size_t);
|
|
extern ssize_t sysdev_show_int(struct sys_device *, struct sysdev_attribute *,
|
|
char *);
|
|
extern ssize_t sysdev_store_int(struct sys_device *,
|
|
struct sysdev_attribute *, const char *, size_t);
|
|
|
|
#define _SYSDEV_ULONG_ATTR(_name, _mode, _var) \
|
|
{ _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
|
|
&(_var) }
|
|
#define SYSDEV_ULONG_ATTR(_name, _mode, _var) \
|
|
struct sysdev_ext_attribute attr_##_name = \
|
|
_SYSDEV_ULONG_ATTR(_name, _mode, _var);
|
|
#define _SYSDEV_INT_ATTR(_name, _mode, _var) \
|
|
{ _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
|
|
&(_var) }
|
|
#define SYSDEV_INT_ATTR(_name, _mode, _var) \
|
|
struct sysdev_ext_attribute attr_##_name = \
|
|
_SYSDEV_INT_ATTR(_name, _mode, _var);
|
|
|
|
#endif /* _SYSDEV_H_ */
|