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[PATCH] Driver core: allow struct device to have a dev_t

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This is the first step in moving class_device to being replaced by
struct device.  It allows struct device to export a dev_t and makes it
easy to dynamically create and destroy struct device as long as they are
associated with a specific class.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
2006-06-14 12:14:34 -07:00
parent aa49b9136e
commit 23681e4791
3 changed files with 176 additions and 1 deletions
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14
include/linux/device.h
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@@ -142,6 +142,7 @@ struct class {
struct subsystem subsys;
struct list_head children;
struct list_head devices;
struct list_head interfaces;
struct semaphore sem; /* locks both the children and interfaces lists */
@@ -305,6 +306,7 @@ struct device {
struct kobject kobj;
char bus_id[BUS_ID_SIZE]; /* position on parent bus */
struct device_attribute uevent_attr;
struct device_attribute *devt_attr;
struct semaphore sem; /* semaphore to synchronize calls to
* its driver.
@@ -332,6 +334,11 @@ struct device {
struct dma_coherent_mem *dma_mem; /* internal for coherent mem
override */
/* class_device migration path */
struct list_head node;
struct class *class; /* optional*/
dev_t devt; /* dev_t, creates the sysfs "dev" */
void (*release)(struct device * dev);
};
@@ -373,6 +380,13 @@ extern int device_attach(struct device * dev);
extern void driver_attach(struct device_driver * drv);
extern void device_reprobe(struct device *dev);
/*
* Easy functions for dynamically creating devices on the fly
*/
extern struct device *device_create(struct class *cls, struct device *parent,
dev_t devt, char *fmt, ...)
__attribute__((format(printf,4,5)));
extern void device_destroy(struct class *cls, dev_t devt);
/*
* Platform "fixup" functions - allow the platform to have their say