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 auxiliary 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 * Auxiliary 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>
29 struct sysdev_class_attribute
;
33 struct list_head drivers
;
34 struct sysdev_class_attribute
**attrs
;
38 struct sysdev_class_attribute
{
39 struct attribute attr
;
40 ssize_t (*show
)(struct sysdev_class
*, struct sysdev_class_attribute
*,
42 ssize_t (*store
)(struct sysdev_class
*, struct sysdev_class_attribute
*,
43 const char *, size_t);
46 #define _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
48 .attr = {.name = __stringify(_name), .mode = _mode }, \
53 #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
54 struct sysdev_class_attribute attr_##_name = \
55 _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store)
58 extern int sysdev_class_register(struct sysdev_class
*);
59 extern void sysdev_class_unregister(struct sysdev_class
*);
61 extern int sysdev_class_create_file(struct sysdev_class
*,
62 struct sysdev_class_attribute
*);
63 extern void sysdev_class_remove_file(struct sysdev_class
*,
64 struct sysdev_class_attribute
*);
66 * Auxiliary system device drivers.
69 struct sysdev_driver
{
70 struct list_head entry
;
71 int (*add
)(struct sys_device
*);
72 int (*remove
)(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
*, struct sysdev_attribute
*, char *);
98 ssize_t (*store
)(struct sys_device
*, struct sysdev_attribute
*,
99 const char *, size_t);
103 #define _SYSDEV_ATTR(_name, _mode, _show, _store) \
105 .attr = { .name = __stringify(_name), .mode = _mode }, \
110 #define SYSDEV_ATTR(_name, _mode, _show, _store) \
111 struct sysdev_attribute attr_##_name = \
112 _SYSDEV_ATTR(_name, _mode, _show, _store);
114 extern int sysdev_create_file(struct sys_device
*, struct sysdev_attribute
*);
115 extern void sysdev_remove_file(struct sys_device
*, struct sysdev_attribute
*);
117 /* Create/remove NULL terminated attribute list */
119 sysdev_create_files(struct sys_device
*d
, struct sysdev_attribute
**a
)
121 return sysfs_create_files(&d
->kobj
, (const struct attribute
**)a
);
125 sysdev_remove_files(struct sys_device
*d
, struct sysdev_attribute
**a
)
127 return sysfs_remove_files(&d
->kobj
, (const struct attribute
**)a
);
130 struct sysdev_ext_attribute
{
131 struct sysdev_attribute attr
;
136 * Support for simple variable sysdev attributes.
137 * The pointer to the variable is stored in a sysdev_ext_attribute
140 /* Add more types as needed */
142 extern ssize_t
sysdev_show_ulong(struct sys_device
*, struct sysdev_attribute
*,
144 extern ssize_t
sysdev_store_ulong(struct sys_device
*,
145 struct sysdev_attribute
*, const char *, size_t);
146 extern ssize_t
sysdev_show_int(struct sys_device
*, struct sysdev_attribute
*,
148 extern ssize_t
sysdev_store_int(struct sys_device
*,
149 struct sysdev_attribute
*, const char *, size_t);
151 #define _SYSDEV_ULONG_ATTR(_name, _mode, _var) \
152 { _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
154 #define SYSDEV_ULONG_ATTR(_name, _mode, _var) \
155 struct sysdev_ext_attribute attr_##_name = \
156 _SYSDEV_ULONG_ATTR(_name, _mode, _var);
157 #define _SYSDEV_INT_ATTR(_name, _mode, _var) \
158 { _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
160 #define SYSDEV_INT_ATTR(_name, _mode, _var) \
161 struct sysdev_ext_attribute attr_##_name = \
162 _SYSDEV_INT_ATTR(_name, _mode, _var);
164 #endif /* _SYSDEV_H_ */
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