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().
cls->name = name;
cls->owner = owner;
cls->class_release = class_create_release;
- cls->release = class_device_create_release;
retval = class_register(cls);
if (retval)
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)
{
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
}
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)
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);
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)
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);
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;
}
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);
projects / linux-2.6-omap-h63xx.git / blobdiff