1 files changed, 0 insertions, 382 deletions
diff --git a/drivers/base/component.c b/drivers/base/component.c
deleted file mode 100644
index c53efe6c6d8e..000000000000
--- a/drivers/base/component.c
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
- * Componentized device handling.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This is work in progress.  We gather up the component devices into a list,
- * and bind them when instructed.  At the moment, we're specific to the DRM
- * subsystem, and only handles one master device, but this doesn't have to be
- * the case.
- */
-#include <linux/component.h>
-#include <linux/device.h>
-#include <linux/kref.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-
-struct master {
-	struct list_head node;
-	struct list_head components;
-	bool bound;
-
-	const struct component_master_ops *ops;
-	struct device *dev;
-};
-
-struct component {
-	struct list_head node;
-	struct list_head master_node;
-	struct master *master;
-	bool bound;
-
-	const struct component_ops *ops;
-	struct device *dev;
-};
-
-static DEFINE_MUTEX(component_mutex);
-static LIST_HEAD(component_list);
-static LIST_HEAD(masters);
-
-static struct master *__master_find(struct device *dev,
-	const struct component_master_ops *ops)
-{
-	struct master *m;
-
-	list_for_each_entry(m, &masters, node)
-		if (m->dev == dev && (!ops || m->ops == ops))
-			return m;
-
-	return NULL;
-}
-
-/* Attach an unattached component to a master. */
-static void component_attach_master(struct master *master, struct component *c)
-{
-	c->master = master;
-
-	list_add_tail(&c->master_node, &master->components);
-}
-
-/* Detach a component from a master. */
-static void component_detach_master(struct master *master, struct component *c)
-{
-	list_del(&c->master_node);
-
-	c->master = NULL;
-}
-
-int component_master_add_child(struct master *master,
-	int (*compare)(struct device *, void *), void *compare_data)
-{
-	struct component *c;
-	int ret = -ENXIO;
-
-	list_for_each_entry(c, &component_list, node) {
-		if (c->master)
-			continue;
-
-		if (compare(c->dev, compare_data)) {
-			component_attach_master(master, c);
-			ret = 0;
-			break;
-		}
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(component_master_add_child);
-
-/* Detach all attached components from this master */
-static void master_remove_components(struct master *master)
-{
-	while (!list_empty(&master->components)) {
-		struct component *c = list_first_entry(&master->components,
-					struct component, master_node);
-
-		WARN_ON(c->master != master);
-
-		component_detach_master(master, c);
-	}
-}
-
-/*
- * Try to bring up a master.  If component is NULL, we're interested in
- * this master, otherwise it's a component which must be present to try
- * and bring up the master.
- *
- * Returns 1 for successful bringup, 0 if not ready, or -ve errno.
- */
-static int try_to_bring_up_master(struct master *master,
-	struct component *component)
-{
-	int ret = 0;
-
-	if (!master->bound) {
-		/*
-		 * Search the list of components, looking for components that
-		 * belong to this master, and attach them to the master.
-		 */
-		if (master->ops->add_components(master->dev, master)) {
-			/* Failed to find all components */
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
-
-		if (component && component->master != master) {
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
-
-		/* Found all components */
-		ret = master->ops->bind(master->dev);
-		if (ret < 0) {
-			master_remove_components(master);
-			goto out;
-		}
-
-		master->bound = true;
-		ret = 1;
-	}
-out:
-
-	return ret;
-}
-
-static int try_to_bring_up_masters(struct component *component)
-{
-	struct master *m;
-	int ret = 0;
-
-	list_for_each_entry(m, &masters, node) {
-		ret = try_to_bring_up_master(m, component);
-		if (ret != 0)
-			break;
-	}
-
-	return ret;
-}
-
-static void take_down_master(struct master *master)
-{
-	if (master->bound) {
-		master->ops->unbind(master->dev);
-		master->bound = false;
-	}
-
-	master_remove_components(master);
-}
-
-int component_master_add(struct device *dev,
-	const struct component_master_ops *ops)
-{
-	struct master *master;
-	int ret;
-
-	master = kzalloc(sizeof(*master), GFP_KERNEL);
-	if (!master)
-		return -ENOMEM;
-
-	master->dev = dev;
-	master->ops = ops;
-	INIT_LIST_HEAD(&master->components);
-
-	/* Add to the list of available masters. */
-	mutex_lock(&component_mutex);
-	list_add(&master->node, &masters);
-
-	ret = try_to_bring_up_master(master, NULL);
-
-	if (ret < 0) {
-		/* Delete off the list if we weren't successful */
-		list_del(&master->node);
-		kfree(master);
-	}
-	mutex_unlock(&component_mutex);
-
-	return ret < 0 ? ret : 0;
-}
-EXPORT_SYMBOL_GPL(component_master_add);
-
-void component_master_del(struct device *dev,
-	const struct component_master_ops *ops)
-{
-	struct master *master;
-
-	mutex_lock(&component_mutex);
-	master = __master_find(dev, ops);
-	if (master) {
-		take_down_master(master);
-
-		list_del(&master->node);
-		kfree(master);
-	}
-	mutex_unlock(&component_mutex);
-}
-EXPORT_SYMBOL_GPL(component_master_del);
-
-static void component_unbind(struct component *component,
-	struct master *master, void *data)
-{
-	WARN_ON(!component->bound);
-
-	component->ops->unbind(component->dev, master->dev, data);
-	component->bound = false;
-
-	/* Release all resources claimed in the binding of this component */
-	devres_release_group(component->dev, component);
-}
-
-void component_unbind_all(struct device *master_dev, void *data)
-{
-	struct master *master;
-	struct component *c;
-
-	WARN_ON(!mutex_is_locked(&component_mutex));
-
-	master = __master_find(master_dev, NULL);
-	if (!master)
-		return;
-
-	list_for_each_entry_reverse(c, &master->components, master_node)
-		component_unbind(c, master, data);
-}
-EXPORT_SYMBOL_GPL(component_unbind_all);
-
-static int component_bind(struct component *component, struct master *master,
-	void *data)
-{
-	int ret;
-
-	/*
-	 * Each component initialises inside its own devres group.
-	 * This allows us to roll-back a failed component without
-	 * affecting anything else.
-	 */
-	if (!devres_open_group(master->dev, NULL, GFP_KERNEL))
-		return -ENOMEM;
-
-	/*
-	 * Also open a group for the device itself: this allows us
-	 * to release the resources claimed against the sub-device
-	 * at the appropriate moment.
-	 */
-	if (!devres_open_group(component->dev, component, GFP_KERNEL)) {
-		devres_release_group(master->dev, NULL);
-		return -ENOMEM;
-	}
-
-	dev_dbg(master->dev, "binding %s (ops %ps)\n",
-		dev_name(component->dev), component->ops);
-
-	ret = component->ops->bind(component->dev, master->dev, data);
-	if (!ret) {
-		component->bound = true;
-
-		/*
-		 * Close the component device's group so that resources
-		 * allocated in the binding are encapsulated for removal
-		 * at unbind.  Remove the group on the DRM device as we
-		 * can clean those resources up independently.
-		 */
-		devres_close_group(component->dev, NULL);
-		devres_remove_group(master->dev, NULL);
-
-		dev_info(master->dev, "bound %s (ops %ps)\n",
-			 dev_name(component->dev), component->ops);
-	} else {
-		devres_release_group(component->dev, NULL);
-		devres_release_group(master->dev, NULL);
-
-		dev_err(master->dev, "failed to bind %s (ops %ps): %d\n",
-			dev_name(component->dev), component->ops, ret);
-	}
-
-	return ret;
-}
-
-int component_bind_all(struct device *master_dev, void *data)
-{
-	struct master *master;
-	struct component *c;
-	int ret = 0;
-
-	WARN_ON(!mutex_is_locked(&component_mutex));
-
-	master = __master_find(master_dev, NULL);
-	if (!master)
-		return -EINVAL;
-
-	list_for_each_entry(c, &master->components, master_node) {
-		ret = component_bind(c, master, data);
-		if (ret)
-			break;
-	}
-
-	if (ret != 0) {
-		list_for_each_entry_continue_reverse(c, &master->components,
-						     master_node)
-			component_unbind(c, master, data);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(component_bind_all);
-
-int component_add(struct device *dev, const struct component_ops *ops)
-{
-	struct component *component;
-	int ret;
-
-	component = kzalloc(sizeof(*component), GFP_KERNEL);
-	if (!component)
-		return -ENOMEM;
-
-	component->ops = ops;
-	component->dev = dev;
-
-	dev_dbg(dev, "adding component (ops %ps)\n", ops);
-
-	mutex_lock(&component_mutex);
-	list_add_tail(&component->node, &component_list);
-
-	ret = try_to_bring_up_masters(component);
-	if (ret < 0) {
-		list_del(&component->node);
-
-		kfree(component);
-	}
-	mutex_unlock(&component_mutex);
-
-	return ret < 0 ? ret : 0;
-}
-EXPORT_SYMBOL_GPL(component_add);
-
-void component_del(struct device *dev, const struct component_ops *ops)
-{
-	struct component *c, *component = NULL;
-
-	mutex_lock(&component_mutex);
-	list_for_each_entry(c, &component_list, node)
-		if (c->dev == dev && c->ops == ops) {
-			list_del(&c->node);
-			component = c;
-			break;
-		}
-
-	if (component && component->master)
-		take_down_master(component->master);
-
-	mutex_unlock(&component_mutex);
-
-	WARN_ON(!component);
-	kfree(component);
-}
-EXPORT_SYMBOL_GPL(component_del);
-
-MODULE_LICENSE("GPL v2");