mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 03:36:19 +00:00
driver core: remove no longer used "struct class_device"
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
Greg Kroah-Hartman
parent
4356d73d02
commit
c3b19ff06e
3 changed files with 1 additions and 745 deletions
|
|
@ -64,17 +64,6 @@ extern void sysdev_shutdown(void);
|
|||
extern int sysdev_suspend(pm_message_t state);
|
||||
extern int sysdev_resume(void);
|
||||
|
||||
static inline struct class_device *to_class_dev(struct kobject *obj)
|
||||
{
|
||||
return container_of(obj, struct class_device, kobj);
|
||||
}
|
||||
|
||||
static inline
|
||||
struct class_device_attribute *to_class_dev_attr(struct attribute *_attr)
|
||||
{
|
||||
return container_of(_attr, struct class_device_attribute, attr);
|
||||
}
|
||||
|
||||
extern char *make_class_name(const char *name, struct kobject *kobj);
|
||||
|
||||
extern int devres_release_all(struct device *dev);
|
||||
|
|
|
|||
|
|
@ -179,27 +179,13 @@ static void class_create_release(struct class *cls)
|
|||
kfree(cls);
|
||||
}
|
||||
|
||||
static void class_device_create_release(struct class_device *class_dev)
|
||||
{
|
||||
pr_debug("%s called for %s\n", __func__, class_dev->class_id);
|
||||
kfree(class_dev);
|
||||
}
|
||||
|
||||
/* needed to allow these devices to have parent class devices */
|
||||
static int class_device_create_uevent(struct class_device *class_dev,
|
||||
struct kobj_uevent_env *env)
|
||||
{
|
||||
pr_debug("%s called for %s\n", __func__, class_dev->class_id);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* class_create - create a struct class structure
|
||||
* @owner: pointer to the module that is to "own" this struct class
|
||||
* @name: pointer to a string for the name of this class.
|
||||
*
|
||||
* This is used to create a struct class pointer that can then be used
|
||||
* in calls to class_device_create().
|
||||
* in calls to device_create().
|
||||
*
|
||||
* Note, the pointer created here is to be destroyed when finished by
|
||||
* making a call to class_destroy().
|
||||
|
|
@ -218,7 +204,6 @@ struct class *class_create(struct module *owner, const char *name)
|
|||
cls->name = name;
|
||||
cls->owner = owner;
|
||||
cls->class_release = class_create_release;
|
||||
cls->release = class_device_create_release;
|
||||
|
||||
retval = class_register(cls);
|
||||
if (retval)
|
||||
|
|
@ -246,113 +231,6 @@ void class_destroy(struct class *cls)
|
|||
class_unregister(cls);
|
||||
}
|
||||
|
||||
/* Class Device Stuff */
|
||||
|
||||
int class_device_create_file(struct class_device *class_dev,
|
||||
const struct class_device_attribute *attr)
|
||||
{
|
||||
int error = -EINVAL;
|
||||
if (class_dev)
|
||||
error = sysfs_create_file(&class_dev->kobj, &attr->attr);
|
||||
return error;
|
||||
}
|
||||
|
||||
void class_device_remove_file(struct class_device *class_dev,
|
||||
const struct class_device_attribute *attr)
|
||||
{
|
||||
if (class_dev)
|
||||
sysfs_remove_file(&class_dev->kobj, &attr->attr);
|
||||
}
|
||||
|
||||
int class_device_create_bin_file(struct class_device *class_dev,
|
||||
struct bin_attribute *attr)
|
||||
{
|
||||
int error = -EINVAL;
|
||||
if (class_dev)
|
||||
error = sysfs_create_bin_file(&class_dev->kobj, attr);
|
||||
return error;
|
||||
}
|
||||
|
||||
void class_device_remove_bin_file(struct class_device *class_dev,
|
||||
struct bin_attribute *attr)
|
||||
{
|
||||
if (class_dev)
|
||||
sysfs_remove_bin_file(&class_dev->kobj, attr);
|
||||
}
|
||||
|
||||
static ssize_t class_device_attr_show(struct kobject *kobj,
|
||||
struct attribute *attr, char *buf)
|
||||
{
|
||||
struct class_device_attribute *class_dev_attr = to_class_dev_attr(attr);
|
||||
struct class_device *cd = to_class_dev(kobj);
|
||||
ssize_t ret = 0;
|
||||
|
||||
if (class_dev_attr->show)
|
||||
ret = class_dev_attr->show(cd, buf);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t class_device_attr_store(struct kobject *kobj,
|
||||
struct attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct class_device_attribute *class_dev_attr = to_class_dev_attr(attr);
|
||||
struct class_device *cd = to_class_dev(kobj);
|
||||
ssize_t ret = 0;
|
||||
|
||||
if (class_dev_attr->store)
|
||||
ret = class_dev_attr->store(cd, buf, count);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct sysfs_ops class_dev_sysfs_ops = {
|
||||
.show = class_device_attr_show,
|
||||
.store = class_device_attr_store,
|
||||
};
|
||||
|
||||
static void class_dev_release(struct kobject *kobj)
|
||||
{
|
||||
struct class_device *cd = to_class_dev(kobj);
|
||||
struct class *cls = cd->class;
|
||||
|
||||
pr_debug("device class '%s': release.\n", cd->class_id);
|
||||
|
||||
if (cd->release)
|
||||
cd->release(cd);
|
||||
else if (cls->release)
|
||||
cls->release(cd);
|
||||
else {
|
||||
printk(KERN_ERR "Class Device '%s' does not have a release() "
|
||||
"function, it is broken and must be fixed.\n",
|
||||
cd->class_id);
|
||||
WARN_ON(1);
|
||||
}
|
||||
}
|
||||
|
||||
static struct kobj_type class_device_ktype = {
|
||||
.sysfs_ops = &class_dev_sysfs_ops,
|
||||
.release = class_dev_release,
|
||||
};
|
||||
|
||||
static int class_uevent_filter(struct kset *kset, struct kobject *kobj)
|
||||
{
|
||||
struct kobj_type *ktype = get_ktype(kobj);
|
||||
|
||||
if (ktype == &class_device_ktype) {
|
||||
struct class_device *class_dev = to_class_dev(kobj);
|
||||
if (class_dev->class)
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char *class_uevent_name(struct kset *kset, struct kobject *kobj)
|
||||
{
|
||||
struct class_device *class_dev = to_class_dev(kobj);
|
||||
|
||||
return class_dev->class->name;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SYSFS_DEPRECATED
|
||||
char *make_class_name(const char *name, struct kobject *kobj)
|
||||
{
|
||||
|
|
@ -370,445 +248,8 @@ char *make_class_name(const char *name, struct kobject *kobj)
|
|||
strcat(class_name, kobject_name(kobj));
|
||||
return class_name;
|
||||
}
|
||||
|
||||
static int make_deprecated_class_device_links(struct class_device *class_dev)
|
||||
{
|
||||
char *class_name;
|
||||
int error;
|
||||
|
||||
if (!class_dev->dev)
|
||||
return 0;
|
||||
|
||||
class_name = make_class_name(class_dev->class->name, &class_dev->kobj);
|
||||
if (class_name)
|
||||
error = sysfs_create_link(&class_dev->dev->kobj,
|
||||
&class_dev->kobj, class_name);
|
||||
else
|
||||
error = -ENOMEM;
|
||||
kfree(class_name);
|
||||
return error;
|
||||
}
|
||||
|
||||
static void remove_deprecated_class_device_links(struct class_device *class_dev)
|
||||
{
|
||||
char *class_name;
|
||||
|
||||
if (!class_dev->dev)
|
||||
return;
|
||||
|
||||
class_name = make_class_name(class_dev->class->name, &class_dev->kobj);
|
||||
if (class_name)
|
||||
sysfs_remove_link(&class_dev->dev->kobj, class_name);
|
||||
kfree(class_name);
|
||||
}
|
||||
#else
|
||||
static inline int make_deprecated_class_device_links(struct class_device *cd)
|
||||
{ return 0; }
|
||||
static void remove_deprecated_class_device_links(struct class_device *cd)
|
||||
{ }
|
||||
#endif
|
||||
|
||||
static int class_uevent(struct kset *kset, struct kobject *kobj,
|
||||
struct kobj_uevent_env *env)
|
||||
{
|
||||
struct class_device *class_dev = to_class_dev(kobj);
|
||||
struct device *dev = class_dev->dev;
|
||||
int retval = 0;
|
||||
|
||||
pr_debug("%s - name = %s\n", __func__, class_dev->class_id);
|
||||
|
||||
if (MAJOR(class_dev->devt)) {
|
||||
add_uevent_var(env, "MAJOR=%u", MAJOR(class_dev->devt));
|
||||
|
||||
add_uevent_var(env, "MINOR=%u", MINOR(class_dev->devt));
|
||||
}
|
||||
|
||||
if (dev) {
|
||||
const char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
|
||||
if (path) {
|
||||
add_uevent_var(env, "PHYSDEVPATH=%s", path);
|
||||
kfree(path);
|
||||
}
|
||||
|
||||
if (dev->bus)
|
||||
add_uevent_var(env, "PHYSDEVBUS=%s", dev->bus->name);
|
||||
|
||||
if (dev->driver)
|
||||
add_uevent_var(env, "PHYSDEVDRIVER=%s",
|
||||
dev->driver->name);
|
||||
}
|
||||
|
||||
if (class_dev->uevent) {
|
||||
/* have the class device specific function add its stuff */
|
||||
retval = class_dev->uevent(class_dev, env);
|
||||
if (retval)
|
||||
pr_debug("class_dev->uevent() returned %d\n", retval);
|
||||
} else if (class_dev->class->uevent) {
|
||||
/* have the class specific function add its stuff */
|
||||
retval = class_dev->class->uevent(class_dev, env);
|
||||
if (retval)
|
||||
pr_debug("class->uevent() returned %d\n", retval);
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static struct kset_uevent_ops class_uevent_ops = {
|
||||
.filter = class_uevent_filter,
|
||||
.name = class_uevent_name,
|
||||
.uevent = class_uevent,
|
||||
};
|
||||
|
||||
/*
|
||||
* DO NOT copy how this is created, kset_create_and_add() should be
|
||||
* called, but this is a hold-over from the old-way and will be deleted
|
||||
* entirely soon.
|
||||
*/
|
||||
static struct kset class_obj_subsys = {
|
||||
.uevent_ops = &class_uevent_ops,
|
||||
};
|
||||
|
||||
static int class_device_add_attrs(struct class_device *cd)
|
||||
{
|
||||
int i;
|
||||
int error = 0;
|
||||
struct class *cls = cd->class;
|
||||
|
||||
if (cls->class_dev_attrs) {
|
||||
for (i = 0; attr_name(cls->class_dev_attrs[i]); i++) {
|
||||
error = class_device_create_file(cd,
|
||||
&cls->class_dev_attrs[i]);
|
||||
if (error)
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
done:
|
||||
return error;
|
||||
err:
|
||||
while (--i >= 0)
|
||||
class_device_remove_file(cd, &cls->class_dev_attrs[i]);
|
||||
goto done;
|
||||
}
|
||||
|
||||
static void class_device_remove_attrs(struct class_device *cd)
|
||||
{
|
||||
int i;
|
||||
struct class *cls = cd->class;
|
||||
|
||||
if (cls->class_dev_attrs) {
|
||||
for (i = 0; attr_name(cls->class_dev_attrs[i]); i++)
|
||||
class_device_remove_file(cd, &cls->class_dev_attrs[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static int class_device_add_groups(struct class_device *cd)
|
||||
{
|
||||
int i;
|
||||
int error = 0;
|
||||
|
||||
if (cd->groups) {
|
||||
for (i = 0; cd->groups[i]; i++) {
|
||||
error = sysfs_create_group(&cd->kobj, cd->groups[i]);
|
||||
if (error) {
|
||||
while (--i >= 0)
|
||||
sysfs_remove_group(&cd->kobj,
|
||||
cd->groups[i]);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
}
|
||||
out:
|
||||
return error;
|
||||
}
|
||||
|
||||
static void class_device_remove_groups(struct class_device *cd)
|
||||
{
|
||||
int i;
|
||||
if (cd->groups)
|
||||
for (i = 0; cd->groups[i]; i++)
|
||||
sysfs_remove_group(&cd->kobj, cd->groups[i]);
|
||||
}
|
||||
|
||||
static ssize_t show_dev(struct class_device *class_dev, char *buf)
|
||||
{
|
||||
return print_dev_t(buf, class_dev->devt);
|
||||
}
|
||||
|
||||
static struct class_device_attribute class_devt_attr =
|
||||
__ATTR(dev, S_IRUGO, show_dev, NULL);
|
||||
|
||||
static ssize_t store_uevent(struct class_device *class_dev,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
kobject_uevent(&class_dev->kobj, KOBJ_ADD);
|
||||
return count;
|
||||
}
|
||||
|
||||
static struct class_device_attribute class_uevent_attr =
|
||||
__ATTR(uevent, S_IWUSR, NULL, store_uevent);
|
||||
|
||||
void class_device_initialize(struct class_device *class_dev)
|
||||
{
|
||||
class_dev->kobj.kset = &class_obj_subsys;
|
||||
kobject_init(&class_dev->kobj, &class_device_ktype);
|
||||
INIT_LIST_HEAD(&class_dev->node);
|
||||
}
|
||||
|
||||
int class_device_add(struct class_device *class_dev)
|
||||
{
|
||||
struct class *parent_class = NULL;
|
||||
struct class_device *parent_class_dev = NULL;
|
||||
struct class_interface *class_intf;
|
||||
int error = -EINVAL;
|
||||
|
||||
class_dev = class_device_get(class_dev);
|
||||
if (!class_dev)
|
||||
return -EINVAL;
|
||||
|
||||
if (!strlen(class_dev->class_id))
|
||||
goto out1;
|
||||
|
||||
parent_class = class_get(class_dev->class);
|
||||
if (!parent_class)
|
||||
goto out1;
|
||||
|
||||
parent_class_dev = class_device_get(class_dev->parent);
|
||||
|
||||
pr_debug("CLASS: registering class device: ID = '%s'\n",
|
||||
class_dev->class_id);
|
||||
|
||||
/* first, register with generic layer. */
|
||||
if (parent_class_dev)
|
||||
class_dev->kobj.parent = &parent_class_dev->kobj;
|
||||
else
|
||||
class_dev->kobj.parent = &parent_class->subsys.kobj;
|
||||
|
||||
error = kobject_add(&class_dev->kobj, class_dev->kobj.parent,
|
||||
"%s", class_dev->class_id);
|
||||
if (error)
|
||||
goto out2;
|
||||
|
||||
/* add the needed attributes to this device */
|
||||
error = sysfs_create_link(&class_dev->kobj,
|
||||
&parent_class->subsys.kobj, "subsystem");
|
||||
if (error)
|
||||
goto out3;
|
||||
|
||||
error = class_device_create_file(class_dev, &class_uevent_attr);
|
||||
if (error)
|
||||
goto out3;
|
||||
|
||||
if (MAJOR(class_dev->devt)) {
|
||||
error = class_device_create_file(class_dev, &class_devt_attr);
|
||||
if (error)
|
||||
goto out4;
|
||||
}
|
||||
|
||||
error = class_device_add_attrs(class_dev);
|
||||
if (error)
|
||||
goto out5;
|
||||
|
||||
if (class_dev->dev) {
|
||||
error = sysfs_create_link(&class_dev->kobj,
|
||||
&class_dev->dev->kobj, "device");
|
||||
if (error)
|
||||
goto out6;
|
||||
}
|
||||
|
||||
error = class_device_add_groups(class_dev);
|
||||
if (error)
|
||||
goto out7;
|
||||
|
||||
error = make_deprecated_class_device_links(class_dev);
|
||||
if (error)
|
||||
goto out8;
|
||||
|
||||
kobject_uevent(&class_dev->kobj, KOBJ_ADD);
|
||||
|
||||
/* notify any interfaces this device is now here */
|
||||
down(&parent_class->sem);
|
||||
list_add_tail(&class_dev->node, &parent_class->children);
|
||||
list_for_each_entry(class_intf, &parent_class->interfaces, node) {
|
||||
if (class_intf->add)
|
||||
class_intf->add(class_dev, class_intf);
|
||||
}
|
||||
up(&parent_class->sem);
|
||||
|
||||
goto out1;
|
||||
|
||||
out8:
|
||||
class_device_remove_groups(class_dev);
|
||||
out7:
|
||||
if (class_dev->dev)
|
||||
sysfs_remove_link(&class_dev->kobj, "device");
|
||||
out6:
|
||||
class_device_remove_attrs(class_dev);
|
||||
out5:
|
||||
if (MAJOR(class_dev->devt))
|
||||
class_device_remove_file(class_dev, &class_devt_attr);
|
||||
out4:
|
||||
class_device_remove_file(class_dev, &class_uevent_attr);
|
||||
out3:
|
||||
kobject_del(&class_dev->kobj);
|
||||
out2:
|
||||
if (parent_class_dev)
|
||||
class_device_put(parent_class_dev);
|
||||
class_put(parent_class);
|
||||
out1:
|
||||
class_device_put(class_dev);
|
||||
return error;
|
||||
}
|
||||
|
||||
int class_device_register(struct class_device *class_dev)
|
||||
{
|
||||
class_device_initialize(class_dev);
|
||||
return class_device_add(class_dev);
|
||||
}
|
||||
|
||||
/**
|
||||
* class_device_create - creates a class device and registers it with sysfs
|
||||
* @cls: pointer to the struct class that this device should be registered to.
|
||||
* @parent: pointer to the parent struct class_device of this new device, if
|
||||
* any.
|
||||
* @devt: the dev_t for the char device to be added.
|
||||
* @device: a pointer to a struct device that is assiociated with this class
|
||||
* device.
|
||||
* @fmt: string for the class device's name
|
||||
*
|
||||
* This function can be used by char device classes. A struct
|
||||
* class_device will be created in sysfs, registered to the specified
|
||||
* class.
|
||||
* A "dev" file will be created, showing the dev_t for the device, if
|
||||
* the dev_t is not 0,0.
|
||||
* If a pointer to a parent struct class_device is passed in, the newly
|
||||
* created struct class_device will be a child of that device in sysfs.
|
||||
* The pointer to the struct class_device will be returned from the
|
||||
* call. Any further sysfs files that might be required can be created
|
||||
* using this pointer.
|
||||
*
|
||||
* Note: the struct class passed to this function must have previously
|
||||
* been created with a call to class_create().
|
||||
*/
|
||||
struct class_device *class_device_create(struct class *cls,
|
||||
struct class_device *parent,
|
||||
dev_t devt,
|
||||
struct device *device,
|
||||
const char *fmt, ...)
|
||||
{
|
||||
va_list args;
|
||||
struct class_device *class_dev = NULL;
|
||||
int retval = -ENODEV;
|
||||
|
||||
if (cls == NULL || IS_ERR(cls))
|
||||
goto error;
|
||||
|
||||
class_dev = kzalloc(sizeof(*class_dev), GFP_KERNEL);
|
||||
if (!class_dev) {
|
||||
retval = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
class_dev->devt = devt;
|
||||
class_dev->dev = device;
|
||||
class_dev->class = cls;
|
||||
class_dev->parent = parent;
|
||||
class_dev->release = class_device_create_release;
|
||||
class_dev->uevent = class_device_create_uevent;
|
||||
|
||||
va_start(args, fmt);
|
||||
vsnprintf(class_dev->class_id, BUS_ID_SIZE, fmt, args);
|
||||
va_end(args);
|
||||
retval = class_device_register(class_dev);
|
||||
if (retval)
|
||||
goto error;
|
||||
|
||||
return class_dev;
|
||||
|
||||
error:
|
||||
kfree(class_dev);
|
||||
return ERR_PTR(retval);
|
||||
}
|
||||
|
||||
void class_device_del(struct class_device *class_dev)
|
||||
{
|
||||
struct class *parent_class = class_dev->class;
|
||||
struct class_device *parent_device = class_dev->parent;
|
||||
struct class_interface *class_intf;
|
||||
|
||||
if (parent_class) {
|
||||
down(&parent_class->sem);
|
||||
list_del_init(&class_dev->node);
|
||||
list_for_each_entry(class_intf, &parent_class->interfaces, node)
|
||||
if (class_intf->remove)
|
||||
class_intf->remove(class_dev, class_intf);
|
||||
up(&parent_class->sem);
|
||||
}
|
||||
|
||||
if (class_dev->dev) {
|
||||
remove_deprecated_class_device_links(class_dev);
|
||||
sysfs_remove_link(&class_dev->kobj, "device");
|
||||
}
|
||||
sysfs_remove_link(&class_dev->kobj, "subsystem");
|
||||
class_device_remove_file(class_dev, &class_uevent_attr);
|
||||
if (MAJOR(class_dev->devt))
|
||||
class_device_remove_file(class_dev, &class_devt_attr);
|
||||
class_device_remove_attrs(class_dev);
|
||||
class_device_remove_groups(class_dev);
|
||||
|
||||
kobject_uevent(&class_dev->kobj, KOBJ_REMOVE);
|
||||
kobject_del(&class_dev->kobj);
|
||||
|
||||
class_device_put(parent_device);
|
||||
class_put(parent_class);
|
||||
}
|
||||
|
||||
void class_device_unregister(struct class_device *class_dev)
|
||||
{
|
||||
pr_debug("CLASS: Unregistering class device. ID = '%s'\n",
|
||||
class_dev->class_id);
|
||||
class_device_del(class_dev);
|
||||
class_device_put(class_dev);
|
||||
}
|
||||
|
||||
/**
|
||||
* class_device_destroy - removes a class device that was created with class_device_create()
|
||||
* @cls: the pointer to the struct class that this device was registered * with.
|
||||
* @devt: the dev_t of the device that was previously registered.
|
||||
*
|
||||
* This call unregisters and cleans up a class device that was created with a
|
||||
* call to class_device_create()
|
||||
*/
|
||||
void class_device_destroy(struct class *cls, dev_t devt)
|
||||
{
|
||||
struct class_device *class_dev = NULL;
|
||||
struct class_device *class_dev_tmp;
|
||||
|
||||
down(&cls->sem);
|
||||
list_for_each_entry(class_dev_tmp, &cls->children, node) {
|
||||
if (class_dev_tmp->devt == devt) {
|
||||
class_dev = class_dev_tmp;
|
||||
break;
|
||||
}
|
||||
}
|
||||
up(&cls->sem);
|
||||
|
||||
if (class_dev)
|
||||
class_device_unregister(class_dev);
|
||||
}
|
||||
|
||||
struct class_device *class_device_get(struct class_device *class_dev)
|
||||
{
|
||||
if (class_dev)
|
||||
return to_class_dev(kobject_get(&class_dev->kobj));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void class_device_put(struct class_device *class_dev)
|
||||
{
|
||||
if (class_dev)
|
||||
kobject_put(&class_dev->kobj);
|
||||
}
|
||||
|
||||
/**
|
||||
* class_for_each_device - device iterator
|
||||
* @class: the class we're iterating
|
||||
|
|
@ -897,56 +338,9 @@ struct device *class_find_device(struct class *class, void *data,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(class_find_device);
|
||||
|
||||
/**
|
||||
* class_find_child - device iterator for locating a particular class_device
|
||||
* @class: the class we're iterating
|
||||
* @data: data for the match function
|
||||
* @match: function to check class_device
|
||||
*
|
||||
* This function returns a reference to a class_device that is 'found' for
|
||||
* later use, as determined by the @match callback.
|
||||
*
|
||||
* The callback should return 0 if the class_device doesn't match and non-zero
|
||||
* if it does. If the callback returns non-zero, this function will
|
||||
* return to the caller and not iterate over any more class_devices.
|
||||
*
|
||||
* Note, you will need to drop the reference with class_device_put() after use.
|
||||
*
|
||||
* We hold class->sem in this function, so it can not be
|
||||
* re-acquired in @match, otherwise it will self-deadlocking. For
|
||||
* example, calls to add or remove class members would be verboten.
|
||||
*/
|
||||
struct class_device *class_find_child(struct class *class, void *data,
|
||||
int (*match)(struct class_device *, void *))
|
||||
{
|
||||
struct class_device *dev;
|
||||
int found = 0;
|
||||
|
||||
if (!class)
|
||||
return NULL;
|
||||
|
||||
down(&class->sem);
|
||||
list_for_each_entry(dev, &class->children, node) {
|
||||
dev = class_device_get(dev);
|
||||
if (dev) {
|
||||
if (match(dev, data)) {
|
||||
found = 1;
|
||||
break;
|
||||
} else
|
||||
class_device_put(dev);
|
||||
} else
|
||||
break;
|
||||
}
|
||||
up(&class->sem);
|
||||
|
||||
return found ? dev : NULL;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(class_find_child);
|
||||
|
||||
int class_interface_register(struct class_interface *class_intf)
|
||||
{
|
||||
struct class *parent;
|
||||
struct class_device *class_dev;
|
||||
struct device *dev;
|
||||
|
||||
if (!class_intf || !class_intf->class)
|
||||
|
|
@ -958,10 +352,6 @@ int class_interface_register(struct class_interface *class_intf)
|
|||
|
||||
down(&parent->sem);
|
||||
list_add_tail(&class_intf->node, &parent->interfaces);
|
||||
if (class_intf->add) {
|
||||
list_for_each_entry(class_dev, &parent->children, node)
|
||||
class_intf->add(class_dev, class_intf);
|
||||
}
|
||||
if (class_intf->add_dev) {
|
||||
list_for_each_entry(dev, &parent->devices, node)
|
||||
class_intf->add_dev(dev, class_intf);
|
||||
|
|
@ -974,7 +364,6 @@ int class_interface_register(struct class_interface *class_intf)
|
|||
void class_interface_unregister(struct class_interface *class_intf)
|
||||
{
|
||||
struct class *parent = class_intf->class;
|
||||
struct class_device *class_dev;
|
||||
struct device *dev;
|
||||
|
||||
if (!parent)
|
||||
|
|
@ -982,10 +371,6 @@ void class_interface_unregister(struct class_interface *class_intf)
|
|||
|
||||
down(&parent->sem);
|
||||
list_del_init(&class_intf->node);
|
||||
if (class_intf->remove) {
|
||||
list_for_each_entry(class_dev, &parent->children, node)
|
||||
class_intf->remove(class_dev, class_intf);
|
||||
}
|
||||
if (class_intf->remove_dev) {
|
||||
list_for_each_entry(dev, &parent->devices, node)
|
||||
class_intf->remove_dev(dev, class_intf);
|
||||
|
|
@ -1000,13 +385,6 @@ int __init classes_init(void)
|
|||
class_kset = kset_create_and_add("class", NULL, NULL);
|
||||
if (!class_kset)
|
||||
return -ENOMEM;
|
||||
|
||||
/* ick, this is ugly, the things we go through to keep from showing up
|
||||
* in sysfs... */
|
||||
kset_init(&class_obj_subsys);
|
||||
kobject_set_name(&class_obj_subsys.kobj, "class_obj");
|
||||
if (!class_obj_subsys.kobj.parent)
|
||||
class_obj_subsys.kobj.parent = &class_obj_subsys.kobj;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -1017,19 +395,5 @@ EXPORT_SYMBOL_GPL(class_unregister);
|
|||
EXPORT_SYMBOL_GPL(class_create);
|
||||
EXPORT_SYMBOL_GPL(class_destroy);
|
||||
|
||||
EXPORT_SYMBOL_GPL(class_device_register);
|
||||
EXPORT_SYMBOL_GPL(class_device_unregister);
|
||||
EXPORT_SYMBOL_GPL(class_device_initialize);
|
||||
EXPORT_SYMBOL_GPL(class_device_add);
|
||||
EXPORT_SYMBOL_GPL(class_device_del);
|
||||
EXPORT_SYMBOL_GPL(class_device_get);
|
||||
EXPORT_SYMBOL_GPL(class_device_put);
|
||||
EXPORT_SYMBOL_GPL(class_device_create);
|
||||
EXPORT_SYMBOL_GPL(class_device_destroy);
|
||||
EXPORT_SYMBOL_GPL(class_device_create_file);
|
||||
EXPORT_SYMBOL_GPL(class_device_remove_file);
|
||||
EXPORT_SYMBOL_GPL(class_device_create_bin_file);
|
||||
EXPORT_SYMBOL_GPL(class_device_remove_bin_file);
|
||||
|
||||
EXPORT_SYMBOL_GPL(class_interface_register);
|
||||
EXPORT_SYMBOL_GPL(class_interface_unregister);
|
||||
|
|
|
|||
|
|
@ -35,7 +35,6 @@ struct device;
|
|||
struct device_driver;
|
||||
struct driver_private;
|
||||
struct class;
|
||||
struct class_device;
|
||||
struct bus_type;
|
||||
struct bus_type_private;
|
||||
|
||||
|
|
@ -190,13 +189,10 @@ struct class {
|
|||
struct kset class_dirs;
|
||||
struct semaphore sem; /* locks children, devices, interfaces */
|
||||
struct class_attribute *class_attrs;
|
||||
struct class_device_attribute *class_dev_attrs;
|
||||
struct device_attribute *dev_attrs;
|
||||
|
||||
int (*uevent)(struct class_device *dev, struct kobj_uevent_env *env);
|
||||
int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
|
||||
|
||||
void (*release)(struct class_device *dev);
|
||||
void (*class_release)(struct class *class);
|
||||
void (*dev_release)(struct device *dev);
|
||||
|
||||
|
|
@ -210,9 +206,6 @@ extern int class_for_each_device(struct class *class, void *data,
|
|||
int (*fn)(struct device *dev, void *data));
|
||||
extern struct device *class_find_device(struct class *class, void *data,
|
||||
int (*match)(struct device *, void *));
|
||||
extern struct class_device *class_find_child(struct class *class, void *data,
|
||||
int (*match)(struct class_device *, void *));
|
||||
|
||||
|
||||
struct class_attribute {
|
||||
struct attribute attr;
|
||||
|
|
@ -228,92 +221,10 @@ extern int __must_check class_create_file(struct class *class,
|
|||
extern void class_remove_file(struct class *class,
|
||||
const struct class_attribute *attr);
|
||||
|
||||
struct class_device_attribute {
|
||||
struct attribute attr;
|
||||
ssize_t (*show)(struct class_device *, char *buf);
|
||||
ssize_t (*store)(struct class_device *, const char *buf, size_t count);
|
||||
};
|
||||
|
||||
#define CLASS_DEVICE_ATTR(_name, _mode, _show, _store) \
|
||||
struct class_device_attribute class_device_attr_##_name = \
|
||||
__ATTR(_name, _mode, _show, _store)
|
||||
|
||||
extern int __must_check class_device_create_file(struct class_device *,
|
||||
const struct class_device_attribute *);
|
||||
|
||||
/**
|
||||
* struct class_device - class devices
|
||||
* @class: pointer to the parent class for this class device. This is required.
|
||||
* @devt: for internal use by the driver core only.
|
||||
* @node: for internal use by the driver core only.
|
||||
* @kobj: for internal use by the driver core only.
|
||||
* @groups: optional additional groups to be created
|
||||
* @dev: if set, a symlink to the struct device is created in the sysfs
|
||||
* directory for this struct class device.
|
||||
* @class_data: pointer to whatever you want to store here for this struct
|
||||
* class_device. Use class_get_devdata() and class_set_devdata() to get and
|
||||
* set this pointer.
|
||||
* @parent: pointer to a struct class_device that is the parent of this struct
|
||||
* class_device. If NULL, this class_device will show up at the root of the
|
||||
* struct class in sysfs (which is probably what you want to have happen.)
|
||||
* @release: pointer to a release function for this struct class_device. If
|
||||
* set, this will be called instead of the class specific release function.
|
||||
* Only use this if you want to override the default release function, like
|
||||
* when you are nesting class_device structures.
|
||||
* @uevent: pointer to a uevent function for this struct class_device. If
|
||||
* set, this will be called instead of the class specific uevent function.
|
||||
* Only use this if you want to override the default uevent function, like
|
||||
* when you are nesting class_device structures.
|
||||
*/
|
||||
struct class_device {
|
||||
struct list_head node;
|
||||
|
||||
struct kobject kobj;
|
||||
struct class *class;
|
||||
dev_t devt;
|
||||
struct device *dev;
|
||||
void *class_data;
|
||||
struct class_device *parent;
|
||||
struct attribute_group **groups;
|
||||
|
||||
void (*release)(struct class_device *dev);
|
||||
int (*uevent)(struct class_device *dev, struct kobj_uevent_env *env);
|
||||
char class_id[BUS_ID_SIZE];
|
||||
};
|
||||
|
||||
static inline void *class_get_devdata(struct class_device *dev)
|
||||
{
|
||||
return dev->class_data;
|
||||
}
|
||||
|
||||
static inline void class_set_devdata(struct class_device *dev, void *data)
|
||||
{
|
||||
dev->class_data = data;
|
||||
}
|
||||
|
||||
|
||||
extern int __must_check class_device_register(struct class_device *);
|
||||
extern void class_device_unregister(struct class_device *);
|
||||
extern void class_device_initialize(struct class_device *);
|
||||
extern int __must_check class_device_add(struct class_device *);
|
||||
extern void class_device_del(struct class_device *);
|
||||
|
||||
extern struct class_device *class_device_get(struct class_device *);
|
||||
extern void class_device_put(struct class_device *);
|
||||
|
||||
extern void class_device_remove_file(struct class_device *,
|
||||
const struct class_device_attribute *);
|
||||
extern int __must_check class_device_create_bin_file(struct class_device *,
|
||||
struct bin_attribute *);
|
||||
extern void class_device_remove_bin_file(struct class_device *,
|
||||
struct bin_attribute *);
|
||||
|
||||
struct class_interface {
|
||||
struct list_head node;
|
||||
struct class *class;
|
||||
|
||||
int (*add) (struct class_device *, struct class_interface *);
|
||||
void (*remove) (struct class_device *, struct class_interface *);
|
||||
int (*add_dev) (struct device *, struct class_interface *);
|
||||
void (*remove_dev) (struct device *, struct class_interface *);
|
||||
};
|
||||
|
|
@ -323,13 +234,6 @@ extern void class_interface_unregister(struct class_interface *);
|
|||
|
||||
extern struct class *class_create(struct module *owner, const char *name);
|
||||
extern void class_destroy(struct class *cls);
|
||||
extern struct class_device *class_device_create(struct class *cls,
|
||||
struct class_device *parent,
|
||||
dev_t devt,
|
||||
struct device *device,
|
||||
const char *fmt, ...)
|
||||
__attribute__((format(printf, 5, 6)));
|
||||
extern void class_device_destroy(struct class *cls, dev_t devt);
|
||||
|
||||
/*
|
||||
* The type of device, "struct device" is embedded in. A class
|
||||
|
|
@ -465,7 +369,6 @@ struct device {
|
|||
spinlock_t devres_lock;
|
||||
struct list_head devres_head;
|
||||
|
||||
/* class_device migration path */
|
||||
struct list_head node;
|
||||
struct class *class;
|
||||
dev_t devt; /* dev_t, creates the sysfs "dev" */
|
||||
|
|
|
|||
Loading…
Reference in a new issue