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>
25 #include <linux/module.h>
30 struct sysdev_class_attribute
;
34 struct list_head drivers
;
35 struct sysdev_class_attribute
**attrs
;
39 struct sysdev_class_attribute
{
40 struct attribute attr
;
41 ssize_t (*show
)(struct sysdev_class
*, struct sysdev_class_attribute
*,
43 ssize_t (*store
)(struct sysdev_class
*, struct sysdev_class_attribute
*,
44 const char *, size_t);
47 #define _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
49 .attr = {.name = __stringify(_name), .mode = _mode }, \
54 #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
55 struct sysdev_class_attribute attr_##_name = \
56 _SYSDEV_CLASS_ATTR(_name,_mode,_show,_store)
59 extern int sysdev_class_register(struct sysdev_class
*);
60 extern void sysdev_class_unregister(struct sysdev_class
*);
62 extern int sysdev_class_create_file(struct sysdev_class
*,
63 struct sysdev_class_attribute
*);
64 extern void sysdev_class_remove_file(struct sysdev_class
*,
65 struct sysdev_class_attribute
*);
67 * Auxiliary system device drivers.
70 struct sysdev_driver
{
71 struct list_head entry
;
72 int (*add
)(struct sys_device
*);
73 int (*remove
)(struct sys_device
*);
77 extern int sysdev_driver_register(struct sysdev_class
*, struct sysdev_driver
*);
78 extern void sysdev_driver_unregister(struct sysdev_class
*, struct sysdev_driver
*);
82 * sys_devices can be simplified a lot from regular devices, because they're
83 * simply not as versatile.
88 struct sysdev_class
* cls
;
92 extern int sysdev_register(struct sys_device
*);
93 extern void sysdev_unregister(struct sys_device
*);
96 struct sysdev_attribute
{
97 struct attribute attr
;
98 ssize_t (*show
)(struct sys_device
*, struct sysdev_attribute
*, char *);
99 ssize_t (*store
)(struct sys_device
*, struct sysdev_attribute
*,
100 const char *, size_t);
104 #define _SYSDEV_ATTR(_name, _mode, _show, _store) \
106 .attr = { .name = __stringify(_name), .mode = _mode }, \
111 #define SYSDEV_ATTR(_name, _mode, _show, _store) \
112 struct sysdev_attribute attr_##_name = \
113 _SYSDEV_ATTR(_name, _mode, _show, _store);
115 extern int sysdev_create_file(struct sys_device
*, struct sysdev_attribute
*);
116 extern void sysdev_remove_file(struct sys_device
*, struct sysdev_attribute
*);
118 /* Create/remove NULL terminated attribute list */
120 sysdev_create_files(struct sys_device
*d
, struct sysdev_attribute
**a
)
122 return sysfs_create_files(&d
->kobj
, (const struct attribute
**)a
);
126 sysdev_remove_files(struct sys_device
*d
, struct sysdev_attribute
**a
)
128 return sysfs_remove_files(&d
->kobj
, (const struct attribute
**)a
);
131 struct sysdev_ext_attribute
{
132 struct sysdev_attribute attr
;
137 * Support for simple variable sysdev attributes.
138 * The pointer to the variable is stored in a sysdev_ext_attribute
141 /* Add more types as needed */
143 extern ssize_t
sysdev_show_ulong(struct sys_device
*, struct sysdev_attribute
*,
145 extern ssize_t
sysdev_store_ulong(struct sys_device
*,
146 struct sysdev_attribute
*, const char *, size_t);
147 extern ssize_t
sysdev_show_int(struct sys_device
*, struct sysdev_attribute
*,
149 extern ssize_t
sysdev_store_int(struct sys_device
*,
150 struct sysdev_attribute
*, const char *, size_t);
152 #define _SYSDEV_ULONG_ATTR(_name, _mode, _var) \
153 { _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
155 #define SYSDEV_ULONG_ATTR(_name, _mode, _var) \
156 struct sysdev_ext_attribute attr_##_name = \
157 _SYSDEV_ULONG_ATTR(_name, _mode, _var);
158 #define _SYSDEV_INT_ATTR(_name, _mode, _var) \
159 { _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
161 #define SYSDEV_INT_ATTR(_name, _mode, _var) \
162 struct sysdev_ext_attribute attr_##_name = \
163 _SYSDEV_INT_ATTR(_name, _mode, _var);
165 #endif /* _SYSDEV_H_ */
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