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Driver core: add device_type to struct device

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This allows us to add type specific attributes, uevent vars and
release funtions.

A subsystem can carry different types of devices like the "block"
subsys has disks and partitions. Both types create a different set
of attributes, but belong to the same subsystem.

This corresponds to the low level objects:
  kobject   -> device       (object/device data)
  kobj_type -> device_type  (type of object/device we are embedded in)
  kset      -> class/bus    (list of objects/devices of a subsystem)

Signed-off-by: Kay Sievers <kay.sievers@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2006-10-07 21:54:55 +02:00
committed by Greg Kroah-Hartman
parent 239378f16a
commit f9f852df2f
3 changed files with 49 additions and 20 deletions
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8
include/linux/device.h
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@@ -328,6 +328,13 @@ extern struct class_device *class_device_create(struct class *cls,
__attribute__((format(printf,5,6)));
extern void class_device_destroy(struct class *cls, dev_t devt);
struct device_type {
struct device_attribute *attrs;
int (*uevent)(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size);
void (*release)(struct device *dev);
};
/* interface for exporting device attributes */
struct device_attribute {
struct attribute attr;
@@ -356,6 +363,7 @@ struct device {
struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */
struct device_type *type;
unsigned is_registered:1;
struct device_attribute uevent_attr;
struct device_attribute *devt_attr;