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>
31 struct list_head drivers;
33 /* Default operations for these types of devices */
34 int (*shutdown)(struct sys_device *);
35 int (*suspend)(struct sys_device *, pm_message_t state);
36 int (*resume)(struct sys_device *);
40 struct sysdev_class_attribute {
41 struct attribute attr;
42 ssize_t (*show)(struct sysdev_class *, char *);
43 ssize_t (*store)(struct sysdev_class *, const char *, size_t);
46 #define SYSDEV_CLASS_ATTR(_name,_mode,_show,_store) \
47 struct sysdev_class_attribute attr_##_name = { \
48 .attr = {.name = __stringify(_name), .mode = _mode }, \
54 extern int sysdev_class_register(struct sysdev_class *);
55 extern void sysdev_class_unregister(struct sysdev_class *);
57 extern int sysdev_class_create_file(struct sysdev_class *,
58 struct sysdev_class_attribute *);
59 extern void sysdev_class_remove_file(struct sysdev_class *,
60 struct sysdev_class_attribute *);
62 * Auxillary system device drivers.
65 struct sysdev_driver {
66 struct list_head entry;
67 int (*add)(struct sys_device *);
68 int (*remove)(struct sys_device *);
69 int (*shutdown)(struct sys_device *);
70 int (*suspend)(struct sys_device *, pm_message_t state);
71 int (*resume)(struct sys_device *);
75 extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *);
76 extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *);
80 * sys_devices can be simplified a lot from regular devices, because they're
81 * simply not as versatile.
86 struct sysdev_class * cls;
90 extern int sysdev_register(struct sys_device *);
91 extern void sysdev_unregister(struct sys_device *);
94 struct sysdev_attribute {
95 struct attribute attr;
96 ssize_t (*show)(struct sys_device *, char *);
97 ssize_t (*store)(struct sys_device *, const char *, size_t);
101 #define _SYSDEV_ATTR(_name,_mode,_show,_store) \
103 .attr = { .name = __stringify(_name), .mode = _mode, \
104 .owner = THIS_MODULE }, \
109 #define SYSDEV_ATTR(_name,_mode,_show,_store) \
110 struct sysdev_attribute attr_##_name = _SYSDEV_ATTR(_name,_mode,_show,_store);
112 extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
113 extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
115 #endif /* _SYSDEV_H_ */