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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/sysdev.h
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2 * System devices follow a slightly different driver model.
3 * They don't need to do dynammic driver binding, can't be probed,
4 * and don't reside on any type of peripheral bus.
5 * So, we represent and treat them a little differently.
7 * We still have a notion of a driver for a system device, because we still
8 * want to perform basic operations on these devices.
10 * We also support auxillary drivers binding to devices of a certain class.
12 * This allows configurable drivers to register themselves for devices of
13 * a certain type. And, it allows class definitions to reside in generic
14 * code while arch-specific code can register specific drivers.
16 * Auxillary drivers registered with a NULL cls are registered as drivers
17 * for all system devices, and get notification calls for each device.
24 #include <linux/kobject.h>
25 #include <linux/module.h>
32 struct list_head drivers
;
34 /* Default operations for these types of devices */
35 int (*shutdown
)(struct sys_device
*);
36 int (*suspend
)(struct sys_device
*, pm_message_t state
);
37 int (*resume
)(struct sys_device
*);
41 struct sysdev_class_attribute
{
42 struct attribute attr
;
43 ssize_t (*show
)(struct sysdev_class
*, char *);
44 ssize_t (*store
)(struct sysdev_class
*, const char *, size_t);
47 #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
48 struct sysdev_class_attribute attr_##_name = { \
49 .attr = {.name = __stringify(_name), .mode = _mode }, \
55 extern int sysdev_class_register(struct sysdev_class
*);
56 extern void sysdev_class_unregister(struct sysdev_class
*);
58 extern int sysdev_class_create_file(struct sysdev_class
*,
59 struct sysdev_class_attribute
*);
60 extern void sysdev_class_remove_file(struct sysdev_class
*,
61 struct sysdev_class_attribute
*);
63 * Auxillary system device drivers.
66 struct sysdev_driver
{
67 struct list_head entry
;
68 int (*add
)(struct sys_device
*);
69 int (*remove
)(struct sys_device
*);
70 int (*shutdown
)(struct sys_device
*);
71 int (*suspend
)(struct sys_device
*, pm_message_t state
);
72 int (*resume
)(struct sys_device
*);
76 extern int sysdev_driver_register(struct sysdev_class
*, struct sysdev_driver
*);
77 extern void sysdev_driver_unregister(struct sysdev_class
*, struct sysdev_driver
*);
81 * sys_devices can be simplified a lot from regular devices, because they're
82 * simply not as versatile.
87 struct sysdev_class
* cls
;
91 extern int sysdev_register(struct sys_device
*);
92 extern void sysdev_unregister(struct sys_device
*);
95 struct sysdev_attribute
{
96 struct attribute attr
;
97 ssize_t (*show
)(struct sys_device
*, char *);
98 ssize_t (*store
)(struct sys_device
*, const char *, size_t);
102 #define _SYSDEV_ATTR(_name,_mode,_show,_store) \
104 .attr = { .name = __stringify(_name), .mode = _mode, \
105 .owner = THIS_MODULE }, \
110 #define SYSDEV_ATTR(_name,_mode,_show,_store) \
111 struct sysdev_attribute attr_##_name = _SYSDEV_ATTR(_name,_mode,_show,_store);
113 extern int sysdev_create_file(struct sys_device
*, struct sysdev_attribute
*);
114 extern void sysdev_remove_file(struct sys_device
*, struct sysdev_attribute
*);
116 #endif /* _SYSDEV_H_ */