Merge tag 'devprop-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework updates from Rafael Wysocki:
 "These add helpers for counting items in a property array and extend
  the "software nodes" support to be more convenient for representing
  device properties supplied by drivers and make the intel_cht_int33fe
  driver use that.

  Specifics:

   - Add helpers to count items in a property array (Andy Shevchenko).

   - Extend "software nodes" support to be more convenient for
     representing device properties supplied by drivers (Heikki
     Krogerus).

   - Add device_find_child_by_name() helper to the driver core (Heikki
     Krogerus).

   - Extend device connection code to also look for references provided
     via fwnode pointers (Heikki Krogerus).

   - Start to register proper struct device objects for USB Type-C muxes
     and orientation switches (Heikki Krogerus).

   - Update the intel_cht_int33fe driver to describe devices in a more
     general way with the help of "software nodes" (Heikki Krogerus)"

* tag 'devprop-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: Add helpers to count items in an array
  platform/x86: intel_cht_int33fe: Replacing the old connections with references
  platform/x86: intel_cht_int33fe: Supply fwnodes for the external dependencies
  platform/x86: intel_cht_int33fe: Provide fwnode for the USB connector
  platform/x86: intel_cht_int33fe: Provide software nodes for the devices
  platform/x86: intel_cht_int33fe: Remove unused fusb302 device property
  platform/x86: intel_cht_int33fe: Register max17047 in its own function
  usb: typec: Registering real device entries for the muxes
  device connection: Find connections also by checking the references
  device property: Introduce fwnode_find_reference()
  ACPI / property: Don't limit named child node matching to data nodes
  driver core: Add helper device_find_child_by_name()
  software node: Add software_node_get_reference_args()
  software node: Use kobject name when finding child nodes by name
  software node: Add support for static node descriptors
  software node: Simplify software_node_release() function
  software node: Allow node creation without properties

drivers/acpi/property.c

@@ -600,15 +600,29 @@ static struct fwnode_handle *
 acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
 				 const char *childname)
 {
+	char name[ACPI_PATH_SEGMENT_LENGTH];
 	struct fwnode_handle *child;
+	struct acpi_buffer path;
+	acpi_status status;
 
-	/*
-	 * Find first matching named child node of this fwnode.
-	 * For ACPI this will be a data only sub-node.
-	 */
-	fwnode_for_each_child_node(fwnode, child)
+	path.length = sizeof(name);
+	path.pointer = name;
+
+	fwnode_for_each_child_node(fwnode, child) {
+		if (is_acpi_data_node(child)) {
 			if (acpi_data_node_match(child, childname))
 				return child;
+			continue;
+		}
+
+		status = acpi_get_name(ACPI_HANDLE_FWNODE(child),
+				       ACPI_SINGLE_NAME, &path);
+		if (ACPI_FAILURE(status))
+			break;
+
+		if (!strncmp(name, childname, ACPI_NAMESEG_SIZE))
+			return child;
+	}
 
 	return NULL;
 }

drivers/base/core.c

@@ -2474,6 +2474,34 @@ struct device *device_find_child(struct device *parent, void *data,
 }
 EXPORT_SYMBOL_GPL(device_find_child);
 
+/**
+ * device_find_child_by_name - device iterator for locating a child device.
+ * @parent: parent struct device
+ * @name: name of the child device
+ *
+ * This is similar to the device_find_child() function above, but it
+ * returns a reference to a device that has the name @name.
+ *
+ * NOTE: you will need to drop the reference with put_device() after use.
+ */
+struct device *device_find_child_by_name(struct device *parent,
+					 const char *name)
+{
+	struct klist_iter i;
+	struct device *child;
+
+	if (!parent)
+		return NULL;
+
+	klist_iter_init(&parent->p->klist_children, &i);
+	while ((child = next_device(&i)))
+		if (!strcmp(dev_name(child), name) && get_device(child))
+			break;
+	klist_iter_exit(&i);
+	return child;
+}
+EXPORT_SYMBOL_GPL(device_find_child_by_name);
+
 int __init devices_init(void)
 {
 	devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);

drivers/base/devcon.c

@@ -38,6 +38,28 @@ fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
 	return NULL;
 }
 
+static void *
+fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id,
+		    void *data, devcon_match_fn_t match)
+{
+	struct device_connection con = { };
+	void *ret;
+	int i;
+
+	for (i = 0; ; i++) {
+		con.fwnode = fwnode_find_reference(fwnode, con_id, i);
+		if (IS_ERR(con.fwnode))
+			break;
+
+		ret = match(&con, -1, data);
+		fwnode_handle_put(con.fwnode);
+		if (ret)
+			return ret;
+	}
+
+	return NULL;
+}
+
 /**
  * device_connection_find_match - Find physical connection to a device
  * @dev: Device with the connection
@@ -65,6 +87,10 @@ void *device_connection_find_match(struct device *dev, const char *con_id,
 		ret = fwnode_graph_devcon_match(fwnode, con_id, data, match);
 		if (ret)
 			return ret;
+
+		ret = fwnode_devcon_match(fwnode, con_id, data, match);
+		if (ret)
+			return ret;
 	}
 
 	mutex_lock(&devcon_lock);

drivers/base/property.c

@@ -484,6 +484,30 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
 }
 EXPORT_SYMBOL_GPL(fwnode_property_get_reference_args);
 
+/**
+ * fwnode_find_reference - Find named reference to a fwnode_handle
+ * @fwnode: Firmware node where to look for the reference
+ * @name: The name of the reference
+ * @index: Index of the reference
+ *
+ * @index can be used when the named reference holds a table of references.
+ *
+ * Returns pointer to the reference fwnode, or ERR_PTR. Caller is responsible to
+ * call fwnode_handle_put() on the returned fwnode pointer.
+ */
+struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
+					    const char *name,
+					    unsigned int index)
+{
+	struct fwnode_reference_args args;
+	int ret;
+
+	ret = fwnode_property_get_reference_args(fwnode, name, NULL, 0, index,
+						 &args);
+	return ret ? ERR_PTR(ret) : args.fwnode;
+}
+EXPORT_SYMBOL_GPL(fwnode_find_reference);
+
 /**
  * device_remove_properties - Remove properties from a device object.
  * @dev: Device whose properties to remove.

drivers/base/swnode.c

@@ -11,25 +11,25 @@
 #include <linux/property.h>
 #include <linux/slab.h>
 
-struct software_node {
+struct swnode {
 	int id;
 	struct kobject kobj;
 	struct fwnode_handle fwnode;
+	const struct software_node *node;
 
 	/* hierarchy */
 	struct ida child_ids;
 	struct list_head entry;
 	struct list_head children;
-	struct software_node *parent;
+	struct swnode *parent;
 
-	/* properties */
-	const struct property_entry *properties;
+	unsigned int allocated:1;
 };
 
 static DEFINE_IDA(swnode_root_ids);
 static struct kset *swnode_kset;
 
-#define kobj_to_swnode(_kobj_) container_of(_kobj_, struct software_node, kobj)
+#define kobj_to_swnode(_kobj_) container_of(_kobj_, struct swnode, kobj)
 
 static const struct fwnode_operations software_node_ops;
 
@@ -37,17 +37,56 @@ bool is_software_node(const struct fwnode_handle *fwnode)
 {
 	return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &software_node_ops;
 }
+EXPORT_SYMBOL_GPL(is_software_node);
 
-#define to_software_node(__fwnode)					\
+#define to_swnode(__fwnode)						\
 	({								\
-		typeof(__fwnode) __to_software_node_fwnode = __fwnode;	\
+		typeof(__fwnode) __to_swnode_fwnode = __fwnode;		\
 									\
-		is_software_node(__to_software_node_fwnode) ?		\
-			container_of(__to_software_node_fwnode,		\
-				     struct software_node, fwnode) :	\
-			NULL;						\
+		is_software_node(__to_swnode_fwnode) ?			\
+			container_of(__to_swnode_fwnode,		\
+				     struct swnode, fwnode) : NULL;	\
 	})
 
+static struct swnode *
+software_node_to_swnode(const struct software_node *node)
+{
+	struct swnode *swnode;
+	struct kobject *k;
+
+	if (!node)
+		return NULL;
+
+	spin_lock(&swnode_kset->list_lock);
+
+	list_for_each_entry(k, &swnode_kset->list, entry) {
+		swnode = kobj_to_swnode(k);
+		if (swnode->node == node)
+			break;
+		swnode = NULL;
+	}
+
+	spin_unlock(&swnode_kset->list_lock);
+
+	return swnode;
+}
+
+const struct software_node *to_software_node(struct fwnode_handle *fwnode)
+{
+	struct swnode *swnode = to_swnode(fwnode);
+
+	return swnode ? swnode->node : NULL;
+}
+EXPORT_SYMBOL_GPL(to_software_node);
+
+struct fwnode_handle *software_node_fwnode(const struct software_node *node)
+{
+	struct swnode *swnode = software_node_to_swnode(node);
+
+	return swnode ? &swnode->fwnode : NULL;
+}
+EXPORT_SYMBOL_GPL(software_node_fwnode);
+
 /* -------------------------------------------------------------------------- */
 /* property_entry processing */
 
@@ -383,6 +422,9 @@ property_entries_dup(const struct property_entry *properties)
 	int i, n = 0;
 	int ret;
 
+	if (!properties)
+		return NULL;
+
 	while (properties[n].name)
 		n++;
 
@@ -430,7 +472,7 @@ EXPORT_SYMBOL_GPL(property_entries_free);
 
 static struct fwnode_handle *software_node_get(struct fwnode_handle *fwnode)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
 	kobject_get(&swnode->kobj);
 
@@ -439,7 +481,7 @@ static struct fwnode_handle *software_node_get(struct fwnode_handle *fwnode)
 
 static void software_node_put(struct fwnode_handle *fwnode)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
 	kobject_put(&swnode->kobj);
 }
@@ -447,8 +489,9 @@ static void software_node_put(struct fwnode_handle *fwnode)
 static bool software_node_property_present(const struct fwnode_handle *fwnode,
 					   const char *propname)
 {
-	return !!property_entry_get(to_software_node(fwnode)->properties,
-				    propname);
+	struct swnode *swnode = to_swnode(fwnode);
+
+	return !!property_entry_get(swnode->node->properties, propname);
 }
 
 static int software_node_read_int_array(const struct fwnode_handle *fwnode,
@@ -456,9 +499,9 @@ static int software_node_read_int_array(const struct fwnode_handle *fwnode,
 					unsigned int elem_size, void *val,
 					size_t nval)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
-	return property_entry_read_int_array(swnode->properties, propname,
+	return property_entry_read_int_array(swnode->node->properties, propname,
 					     elem_size, val, nval);
 }
 
@@ -466,27 +509,26 @@ static int software_node_read_string_array(const struct fwnode_handle *fwnode,
 					   const char *propname,
 					   const char **val, size_t nval)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
-	return property_entry_read_string_array(swnode->properties, propname,
-						val, nval);
+	return property_entry_read_string_array(swnode->node->properties,
+						propname, val, nval);
 }
 
 static struct fwnode_handle *
 software_node_get_parent(const struct fwnode_handle *fwnode)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
-	return swnode ? (swnode->parent ? &swnode->parent->fwnode : NULL) :
-			NULL;
+	return swnode ? (swnode->parent ? &swnode->parent->fwnode : NULL) : NULL;
 }
 
 static struct fwnode_handle *
 software_node_get_next_child(const struct fwnode_handle *fwnode,
 			     struct fwnode_handle *child)
 {
-	struct software_node *p = to_software_node(fwnode);
-	struct software_node *c = to_software_node(child);
+	struct swnode *p = to_swnode(fwnode);
+	struct swnode *c = to_swnode(child);
 
 	if (!p || list_empty(&p->children) ||
 	    (c && list_is_last(&c->entry, &p->children)))
@@ -495,7 +537,7 @@ software_node_get_next_child(const struct fwnode_handle *fwnode,
 	if (c)
 		c = list_next_entry(c, entry);
 	else
-		c = list_first_entry(&p->children, struct software_node, entry);
+		c = list_first_entry(&p->children, struct swnode, entry);
 	return &c->fwnode;
 }
 
@@ -503,18 +545,14 @@ static struct fwnode_handle *
 software_node_get_named_child_node(const struct fwnode_handle *fwnode,
 				   const char *childname)
 {
-	struct software_node *swnode = to_software_node(fwnode);
-	const struct property_entry *prop;
-	struct software_node *child;
+	struct swnode *swnode = to_swnode(fwnode);
+	struct swnode *child;
 
 	if (!swnode || list_empty(&swnode->children))
 		return NULL;
 
 	list_for_each_entry(child, &swnode->children, entry) {
-		prop = property_entry_get(child->properties, "name");
-		if (!prop)
-			continue;
-		if (!strcmp(childname, prop->value.str)) {
+		if (!strcmp(childname, kobject_name(&child->kobj))) {
 			kobject_get(&child->kobj);
 			return &child->fwnode;
 		}
@@ -522,6 +560,52 @@ software_node_get_named_child_node(const struct fwnode_handle *fwnode,
 	return NULL;
 }
 
+static int
+software_node_get_reference_args(const struct fwnode_handle *fwnode,
+				 const char *propname, const char *nargs_prop,
+				 unsigned int nargs, unsigned int index,
+				 struct fwnode_reference_args *args)
+{
+	struct swnode *swnode = to_swnode(fwnode);
+	const struct software_node_reference *ref;
+	const struct property_entry *prop;
+	struct fwnode_handle *refnode;
+	int i;
+
+	if (!swnode || !swnode->node->references)
+		return -ENOENT;
+
+	for (ref = swnode->node->references; ref->name; ref++)
+		if (!strcmp(ref->name, propname))
+			break;
+
+	if (!ref->name || index > (ref->nrefs - 1))
+		return -ENOENT;
+
+	refnode = software_node_fwnode(ref->refs[index].node);
+	if (!refnode)
+		return -ENOENT;
+
+	if (nargs_prop) {
+		prop = property_entry_get(swnode->node->properties, nargs_prop);
+		if (!prop)
+			return -EINVAL;
+
+		nargs = prop->value.u32_data;
+	}
+
+	if (nargs > NR_FWNODE_REFERENCE_ARGS)
+		return -EINVAL;
+
+	args->fwnode = software_node_get(refnode);
+	args->nargs = nargs;
+
+	for (i = 0; i < nargs; i++)
+		args->args[i] = ref->refs[index].args[i];
+
+	return 0;
+}
+
 static const struct fwnode_operations software_node_ops = {
 	.get = software_node_get,
 	.put = software_node_put,
@@ -531,12 +615,13 @@ static const struct fwnode_operations software_node_ops = {
 	.get_parent = software_node_get_parent,
 	.get_next_child_node = software_node_get_next_child,
 	.get_named_child_node = software_node_get_named_child_node,
+	.get_reference_args = software_node_get_reference_args
 };
 
 /* -------------------------------------------------------------------------- */
 
 static int
-software_node_register_properties(struct software_node *swnode,
+software_node_register_properties(struct software_node *node,
 				  const struct property_entry *properties)
 {
 	struct property_entry *props;
@@ -545,24 +630,20 @@ software_node_register_properties(struct software_node *swnode,
 	if (IS_ERR(props))
 		return PTR_ERR(props);
 
-	swnode->properties = props;
+	node->properties = props;
 
 	return 0;
 }
 
 static void software_node_release(struct kobject *kobj)
 {
-	struct software_node *swnode = kobj_to_swnode(kobj);
+	struct swnode *swnode = kobj_to_swnode(kobj);
 
-	if (swnode->parent) {
-		ida_simple_remove(&swnode->parent->child_ids, swnode->id);
-		list_del(&swnode->entry);
-	} else {
-		ida_simple_remove(&swnode_root_ids, swnode->id);
+	if (swnode->allocated) {
+		property_entries_free(swnode->node->properties);
+		kfree(swnode->node);
 	}
-
 	ida_destroy(&swnode->child_ids);
-	property_entries_free(swnode->properties);
 	kfree(swnode);
 }
 
@@ -571,70 +652,165 @@ static struct kobj_type software_node_type = {
 	.sysfs_ops = &kobj_sysfs_ops,
 };
 
-struct fwnode_handle *
-fwnode_create_software_node(const struct property_entry *properties,
-			    const struct fwnode_handle *parent)
+static struct fwnode_handle *
+swnode_register(const struct software_node *node, struct swnode *parent,
+		unsigned int allocated)
 {
-	struct software_node *p = NULL;
-	struct software_node *swnode;
+	struct swnode *swnode;
 	int ret;
 
-	if (parent) {
-		if (IS_ERR(parent))
-			return ERR_CAST(parent);
-		if (!is_software_node(parent))
-			return ERR_PTR(-EINVAL);
-		p = to_software_node(parent);
-	}
-
 	swnode = kzalloc(sizeof(*swnode), GFP_KERNEL);
-	if (!swnode)
-		return ERR_PTR(-ENOMEM);
+	if (!swnode) {
+		ret = -ENOMEM;
+		goto out_err;
+	}
 
-	ret = ida_simple_get(p ? &p->child_ids : &swnode_root_ids, 0, 0,
-			     GFP_KERNEL);
+	ret = ida_simple_get(parent ? &parent->child_ids : &swnode_root_ids,
+			     0, 0, GFP_KERNEL);
 	if (ret < 0) {
 		kfree(swnode);
-		return ERR_PTR(ret);
+		goto out_err;
 	}
 
 	swnode->id = ret;
+	swnode->node = node;
+	swnode->parent = parent;
+	swnode->allocated = allocated;
 	swnode->kobj.kset = swnode_kset;
 	swnode->fwnode.ops = &software_node_ops;
 
 	ida_init(&swnode->child_ids);
 	INIT_LIST_HEAD(&swnode->entry);
 	INIT_LIST_HEAD(&swnode->children);
-	swnode->parent = p;
-
-	if (p)
-		list_add_tail(&swnode->entry, &p->children);
 
+	if (node->name)
 		ret = kobject_init_and_add(&swnode->kobj, &software_node_type,
-				   p ? &p->kobj : NULL, "node%d", swnode->id);
+					   parent ? &parent->kobj : NULL,
+					   "%s", node->name);
+	else
+		ret = kobject_init_and_add(&swnode->kobj, &software_node_type,
+					   parent ? &parent->kobj : NULL,
+					   "node%d", swnode->id);
 	if (ret) {
 		kobject_put(&swnode->kobj);
 		return ERR_PTR(ret);
 	}
 
-	ret = software_node_register_properties(swnode, properties);
+	if (parent)
+		list_add_tail(&swnode->entry, &parent->children);
+
+	kobject_uevent(&swnode->kobj, KOBJ_ADD);
+	return &swnode->fwnode;
+
+out_err:
+	if (allocated)
+		property_entries_free(node->properties);
+	return ERR_PTR(ret);
+}
+
+/**
+ * software_node_register_nodes - Register an array of software nodes
+ * @nodes: Zero terminated array of software nodes to be registered
+ *
+ * Register multiple software nodes at once.
+ */
+int software_node_register_nodes(const struct software_node *nodes)
+{
+	int ret;
+	int i;
+
+	for (i = 0; nodes[i].name; i++) {
+		ret = software_node_register(&nodes[i]);
 		if (ret) {
-		kobject_put(&swnode->kobj);
+			software_node_unregister_nodes(nodes);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(software_node_register_nodes);
+
+/**
+ * software_node_unregister_nodes - Unregister an array of software nodes
+ * @nodes: Zero terminated array of software nodes to be unregistered
+ *
+ * Unregister multiple software nodes at once.
+ */
+void software_node_unregister_nodes(const struct software_node *nodes)
+{
+	struct swnode *swnode;
+	int i;
+
+	for (i = 0; nodes[i].name; i++) {
+		swnode = software_node_to_swnode(&nodes[i]);
+		if (swnode)
+			fwnode_remove_software_node(&swnode->fwnode);
+	}
+}
+EXPORT_SYMBOL_GPL(software_node_unregister_nodes);
+
+/**
+ * software_node_register - Register static software node
+ * @node: The software node to be registered
+ */
+int software_node_register(const struct software_node *node)
+{
+	struct swnode *parent = software_node_to_swnode(node->parent);
+
+	if (software_node_to_swnode(node))
+		return -EEXIST;
+
+	return PTR_ERR_OR_ZERO(swnode_register(node, parent, 0));
+}
+EXPORT_SYMBOL_GPL(software_node_register);
+
+struct fwnode_handle *
+fwnode_create_software_node(const struct property_entry *properties,
+			    const struct fwnode_handle *parent)
+{
+	struct software_node *node;
+	struct swnode *p = NULL;
+	int ret;
+
+	if (parent) {
+		if (IS_ERR(parent))
+			return ERR_CAST(parent);
+		if (!is_software_node(parent))
+			return ERR_PTR(-EINVAL);
+		p = to_swnode(parent);
+	}
+
+	node = kzalloc(sizeof(*node), GFP_KERNEL);
+	if (!node)
+		return ERR_PTR(-ENOMEM);
+
+	ret = software_node_register_properties(node, properties);
+	if (ret) {
+		kfree(node);
 		return ERR_PTR(ret);
 	}
 
-	kobject_uevent(&swnode->kobj, KOBJ_ADD);
-	return &swnode->fwnode;
+	node->parent = p ? p->node : NULL;
+
+	return swnode_register(node, p, 1);
 }
 EXPORT_SYMBOL_GPL(fwnode_create_software_node);
 
 void fwnode_remove_software_node(struct fwnode_handle *fwnode)
 {
-	struct software_node *swnode = to_software_node(fwnode);
+	struct swnode *swnode = to_swnode(fwnode);
 
 	if (!swnode)
 		return;
 
+	if (swnode->parent) {
+		ida_simple_remove(&swnode->parent->child_ids, swnode->id);
+		list_del(&swnode->entry);
+	} else {
+		ida_simple_remove(&swnode_root_ids, swnode->id);
+	}
+
 	kobject_put(&swnode->kobj);
 }
 EXPORT_SYMBOL_GPL(fwnode_remove_software_node);
@@ -642,7 +818,7 @@ EXPORT_SYMBOL_GPL(fwnode_remove_software_node);
 int software_node_notify(struct device *dev, unsigned long action)
 {
 	struct fwnode_handle *fwnode = dev_fwnode(dev);
-	struct software_node *swnode;
+	struct swnode *swnode;
 	int ret;
 
 	if (!fwnode)
@@ -653,7 +829,7 @@ int software_node_notify(struct device *dev, unsigned long action)
 	if (!is_software_node(fwnode))
 		return 0;
 
-	swnode = to_software_node(fwnode);
+	swnode = to_swnode(fwnode);
 
 	switch (action) {
 	case KOBJ_ADD:

drivers/platform/x86/intel_cht_int33fe.c

@@ -21,18 +21,55 @@
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
+#include <linux/usb/pd.h>
 
 #define EXPECTED_PTYPE		4
 
+enum {
+	INT33FE_NODE_FUSB302,
+	INT33FE_NODE_MAX17047,
+	INT33FE_NODE_PI3USB30532,
+	INT33FE_NODE_DISPLAYPORT,
+	INT33FE_NODE_ROLE_SWITCH,
+	INT33FE_NODE_USB_CONNECTOR,
+	INT33FE_NODE_MAX,
+};
+
 struct cht_int33fe_data {
 	struct i2c_client *max17047;
 	struct i2c_client *fusb302;
 	struct i2c_client *pi3usb30532;
-	/* Contain a list-head must be per device */
-	struct device_connection connections[4];
+
+	struct fwnode_handle *dp;
+	struct fwnode_handle *mux;
+};
+
+static const struct software_node nodes[];
+
+static const struct software_node_ref_args pi3usb30532_ref = {
+	&nodes[INT33FE_NODE_PI3USB30532]
+};
+
+static const struct software_node_ref_args dp_ref = {
+	&nodes[INT33FE_NODE_DISPLAYPORT]
+};
+
+static struct software_node_ref_args mux_ref;
+
+static const struct software_node_reference usb_connector_refs[] = {
+	{ "orientation-switch", 1, &pi3usb30532_ref},
+	{ "mode-switch", 1, &pi3usb30532_ref},
+	{ "displayport", 1, &dp_ref},
+	{ }
+};
+
+static const struct software_node_reference fusb302_refs[] = {
+	{ "usb-role-switch", 1, &mux_ref},
+	{ }
 };
 
 /*
@@ -63,14 +100,6 @@ static int cht_int33fe_check_for_max17047(struct device *dev, void *data)
 	return 1;
 }
 
-static struct i2c_client *cht_int33fe_find_max17047(void)
-{
-	struct i2c_client *max17047 = NULL;
-
-	i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
-	return max17047;
-}
-
 static const char * const max17047_suppliers[] = { "bq24190-charger" };
 
 static const struct property_entry max17047_props[] = {
@@ -80,18 +109,196 @@ static const struct property_entry max17047_props[] = {
 
 static const struct property_entry fusb302_props[] = {
 	PROPERTY_ENTRY_STRING("linux,extcon-name", "cht_wcove_pwrsrc"),
-	PROPERTY_ENTRY_U32("fcs,max-sink-microvolt", 12000000),
-	PROPERTY_ENTRY_U32("fcs,max-sink-microamp",   3000000),
-	PROPERTY_ENTRY_U32("fcs,max-sink-microwatt", 36000000),
 	{ }
 };
 
+#define PDO_FIXED_FLAGS \
+	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
+
+static const u32 src_pdo[] = {
+	PDO_FIXED(5000, 1500, PDO_FIXED_FLAGS),
+};
+
+static const u32 snk_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
+	PDO_VAR(5000, 12000, 3000),
+};
+
+static const struct property_entry usb_connector_props[] = {
+	PROPERTY_ENTRY_STRING("data-role", "dual"),
+	PROPERTY_ENTRY_STRING("power-role", "dual"),
+	PROPERTY_ENTRY_STRING("try-power-role", "sink"),
+	PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo),
+	PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo),
+	PROPERTY_ENTRY_U32("op-sink-microwatt", 2500000),
+	{ }
+};
+
+static const struct software_node nodes[] = {
+	{ "fusb302", NULL, fusb302_props, fusb302_refs },
+	{ "max17047", NULL, max17047_props },
+	{ "pi3usb30532" },
+	{ "displayport" },
+	{ "usb-role-switch" },
+	{ "connector", &nodes[0], usb_connector_props, usb_connector_refs },
+	{ }
+};
+
+static int cht_int33fe_setup_mux(struct cht_int33fe_data *data)
+{
+	struct fwnode_handle *fwnode;
+	struct device *dev;
+	struct device *p;
+
+	fwnode = software_node_fwnode(&nodes[INT33FE_NODE_ROLE_SWITCH]);
+	if (!fwnode)
+		return -ENODEV;
+
+	/* First finding the platform device */
+	p = bus_find_device_by_name(&platform_bus_type, NULL,
+				    "intel_xhci_usb_sw");
+	if (!p)
+		return -EPROBE_DEFER;
+
+	/* Then the mux child device */
+	dev = device_find_child_by_name(p, "intel_xhci_usb_sw-role-switch");
+	put_device(p);
+	if (!dev)
+		return -EPROBE_DEFER;
+
+	/* If there already is a node for the mux, using that one. */
+	if (dev->fwnode)
+		fwnode_remove_software_node(fwnode);
+	else
+		dev->fwnode = fwnode;
+
+	data->mux = fwnode_handle_get(dev->fwnode);
+	put_device(dev);
+	mux_ref.node = to_software_node(data->mux);
+
+	return 0;
+}
+
+static int cht_int33fe_setup_dp(struct cht_int33fe_data *data)
+{
+	struct fwnode_handle *fwnode;
+	struct pci_dev *pdev;
+
+	fwnode = software_node_fwnode(&nodes[INT33FE_NODE_DISPLAYPORT]);
+	if (!fwnode)
+		return -ENODEV;
+
+	/* First let's find the GPU PCI device */
+	pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
+	if (!pdev || pdev->vendor != PCI_VENDOR_ID_INTEL) {
+		pci_dev_put(pdev);
+		return -ENODEV;
+	}
+
+	/* Then the DP child device node */
+	data->dp = device_get_named_child_node(&pdev->dev, "DD02");
+	pci_dev_put(pdev);
+	if (!data->dp)
+		return -ENODEV;
+
+	fwnode->secondary = ERR_PTR(-ENODEV);
+	data->dp->secondary = fwnode;
+
+	return 0;
+}
+
+static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data)
+{
+	software_node_unregister_nodes(nodes);
+
+	if (data->mux) {
+		fwnode_handle_put(data->mux);
+		mux_ref.node = NULL;
+		data->mux = NULL;
+	}
+
+	if (data->dp) {
+		data->dp->secondary = NULL;
+		fwnode_handle_put(data->dp);
+		data->dp = NULL;
+	}
+}
+
+static int cht_int33fe_add_nodes(struct cht_int33fe_data *data)
+{
+	int ret;
+
+	ret = software_node_register_nodes(nodes);
+	if (ret)
+		return ret;
+
+	/* The devices that are not created in this driver need extra steps. */
+
+	/*
+	 * There is no ACPI device node for the USB role mux, so we need to find
+	 * the mux device and assign our node directly to it. That means we
+	 * depend on the mux driver. This function will return -PROBE_DEFER
+	 * until the mux device is registered.
+	 */
+	ret = cht_int33fe_setup_mux(data);
+	if (ret)
+		goto err_remove_nodes;
+
+	/*
+	 * The DP connector does have ACPI device node. In this case we can just
+	 * find that ACPI node and assign our node as the secondary node to it.
+	 */
+	ret = cht_int33fe_setup_dp(data);
+	if (ret)
+		goto err_remove_nodes;
+
+	return 0;
+
+err_remove_nodes:
+	cht_int33fe_remove_nodes(data);
+
+	return ret;
+}
+
+static int
+cht_int33fe_register_max17047(struct device *dev, struct cht_int33fe_data *data)
+{
+	struct i2c_client *max17047 = NULL;
+	struct i2c_board_info board_info;
+	struct fwnode_handle *fwnode;
+	int ret;
+
+	fwnode = software_node_fwnode(&nodes[INT33FE_NODE_MAX17047]);
+	if (!fwnode)
+		return -ENODEV;
+
+	i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
+	if (max17047) {
+		/* Pre-existing i2c-client for the max17047, add device-props */
+		fwnode->secondary = ERR_PTR(-ENODEV);
+		max17047->dev.fwnode->secondary = fwnode;
+		/* And re-probe to get the new device-props applied. */
+		ret = device_reprobe(&max17047->dev);
+		if (ret)
+			dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
+		return 0;
+	}
+
+	memset(&board_info, 0, sizeof(board_info));
+	strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
+	board_info.dev_name = "max17047";
+	board_info.fwnode = fwnode;
+	data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
+
+	return PTR_ERR_OR_ZERO(data->max17047);
+}
+
 static int cht_int33fe_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct i2c_board_info board_info;
 	struct cht_int33fe_data *data;
-	struct i2c_client *max17047;
+	struct fwnode_handle *fwnode;
 	struct regulator *regulator;
 	unsigned long long ptyp;
 	acpi_status status;
@@ -151,43 +358,25 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
-	/* Work around BIOS bug, see comment on cht_int33fe_find_max17047 */
-	max17047 = cht_int33fe_find_max17047();
-	if (max17047) {
-		/* Pre-existing i2c-client for the max17047, add device-props */
-		ret = device_add_properties(&max17047->dev, max17047_props);
+	ret = cht_int33fe_add_nodes(data);
 	if (ret)
 		return ret;
-		/* And re-probe to get the new device-props applied. */
-		ret = device_reprobe(&max17047->dev);
-		if (ret)
-			dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
-	} else {
-		memset(&board_info, 0, sizeof(board_info));
-		strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
-		board_info.dev_name = "max17047";
-		board_info.properties = max17047_props;
-		data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
-		if (IS_ERR(data->max17047))
-			return PTR_ERR(data->max17047);
-	}
 
-	data->connections[0].endpoint[0] = "port0";
-	data->connections[0].endpoint[1] = "i2c-pi3usb30532";
-	data->connections[0].id = "orientation-switch";
-	data->connections[1].endpoint[0] = "port0";
-	data->connections[1].endpoint[1] = "i2c-pi3usb30532";
-	data->connections[1].id = "mode-switch";
-	data->connections[2].endpoint[0] = "i2c-fusb302";
-	data->connections[2].endpoint[1] = "intel_xhci_usb_sw-role-switch";
-	data->connections[2].id = "usb-role-switch";
+	/* Work around BIOS bug, see comment on cht_int33fe_check_for_max17047 */
+	ret = cht_int33fe_register_max17047(dev, data);
+	if (ret)
+		goto out_remove_nodes;
 
-	device_connections_add(data->connections);
+	fwnode = software_node_fwnode(&nodes[INT33FE_NODE_FUSB302]);
+	if (!fwnode) {
+		ret = -ENODEV;
+		goto out_unregister_max17047;
+	}
 
 	memset(&board_info, 0, sizeof(board_info));
 	strlcpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
 	board_info.dev_name = "fusb302";
-	board_info.properties = fusb302_props;
+	board_info.fwnode = fwnode;
 	board_info.irq = fusb302_irq;
 
 	data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
@@ -196,8 +385,15 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 		goto out_unregister_max17047;
 	}
 
+	fwnode = software_node_fwnode(&nodes[INT33FE_NODE_PI3USB30532]);
+	if (!fwnode) {
+		ret = -ENODEV;
+		goto out_unregister_fusb302;
+	}
+
 	memset(&board_info, 0, sizeof(board_info));
 	board_info.dev_name = "pi3usb30532";
+	board_info.fwnode = fwnode;
 	strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
 
 	data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
@@ -216,7 +412,8 @@ static int cht_int33fe_probe(struct platform_device *pdev)
 out_unregister_max17047:
 	i2c_unregister_device(data->max17047);
 
-	device_connections_remove(data->connections);
+out_remove_nodes:
+	cht_int33fe_remove_nodes(data);
 
 	return ret;
 }
@@ -229,7 +426,7 @@ static int cht_int33fe_remove(struct platform_device *pdev)
 	i2c_unregister_device(data->fusb302);
 	i2c_unregister_device(data->max17047);
 
-	device_connections_remove(data->connections);
+	cht_int33fe_remove_nodes(data);
 
 	return 0;
 }

drivers/usb/roles/class.c

@@ -101,7 +101,7 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
 	struct device *dev;
 
 	if (con->fwnode) {
-		if (!fwnode_property_present(con->fwnode, con->id))
+		if (con->id && !fwnode_property_present(con->fwnode, con->id))
 			return NULL;
 
 		dev = class_find_device(role_class, NULL, con->fwnode,

drivers/usb/typec/bus.h

@@ -35,4 +35,19 @@ extern const struct device_type typec_port_dev_type;
 #define is_typec_altmode(_dev_) (_dev_->type == &typec_altmode_dev_type)
 #define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
 
+extern struct class typec_mux_class;
+
+struct typec_switch {
+	struct device dev;
+	typec_switch_set_fn_t set;
+};
+
+struct typec_mux {
+	struct device dev;
+	typec_mux_set_fn_t set;
+};
+
+#define to_typec_switch(_dev_) container_of(_dev_, struct typec_switch, dev)
+#define to_typec_mux(_dev_) container_of(_dev_, struct typec_mux, dev)
+
 #endif /* __USB_TYPEC_ALTMODE_H__ */

drivers/usb/typec/class.c

@@ -1646,13 +1646,25 @@ static int __init typec_init(void)
 	if (ret)
 		return ret;
 
+	ret = class_register(&typec_mux_class);
+	if (ret)
+		goto err_unregister_bus;
+
 	typec_class = class_create(THIS_MODULE, "typec");
 	if (IS_ERR(typec_class)) {
-		bus_unregister(&typec_bus);
-		return PTR_ERR(typec_class);
+		ret = PTR_ERR(typec_class);
+		goto err_unregister_mux_class;
 	}
 
 	return 0;
+
+err_unregister_mux_class:
+	class_unregister(&typec_mux_class);
+
+err_unregister_bus:
+	bus_unregister(&typec_bus);
+
+	return ret;
 }
 subsys_initcall(typec_init);
 
@@ -1661,6 +1673,7 @@ static void __exit typec_exit(void)
 	class_destroy(typec_class);
 	ida_destroy(&typec_index_ida);
 	bus_unregister(&typec_bus);
+	class_unregister(&typec_mux_class);
 }
 module_exit(typec_exit);
 

drivers/usb/typec/mux.c

@@ -15,35 +15,47 @@
 #include <linux/slab.h>
 #include <linux/usb/typec_mux.h>
 
-static DEFINE_MUTEX(switch_lock);
-static DEFINE_MUTEX(mux_lock);
-static LIST_HEAD(switch_list);
-static LIST_HEAD(mux_list);
+#include "bus.h"
+
+static int name_match(struct device *dev, const void *name)
+{
+	return !strcmp((const char *)name, dev_name(dev));
+}
+
+static bool dev_name_ends_with(struct device *dev, const char *suffix)
+{
+	const char *name = dev_name(dev);
+	const int name_len = strlen(name);
+	const int suffix_len = strlen(suffix);
+
+	if (suffix_len > name_len)
+		return false;
+
+	return strcmp(name + (name_len - suffix_len), suffix) == 0;
+}
+
+static int switch_fwnode_match(struct device *dev, const void *fwnode)
+{
+	return dev_fwnode(dev) == fwnode && dev_name_ends_with(dev, "-switch");
+}
 
 static void *typec_switch_match(struct device_connection *con, int ep,
 				void *data)
 {
-	struct typec_switch *sw;
+	struct device *dev;
 
-	if (!con->fwnode) {
-		list_for_each_entry(sw, &switch_list, entry)
-			if (!strcmp(con->endpoint[ep], dev_name(sw->dev)))
-				return sw;
-		return ERR_PTR(-EPROBE_DEFER);
-	}
-
-	/*
-	 * With OF graph the mux node must have a boolean device property named
-	 * "orientation-switch".
-	 */
+	if (con->fwnode) {
 		if (con->id && !fwnode_property_present(con->fwnode, con->id))
 			return NULL;
 
-	list_for_each_entry(sw, &switch_list, entry)
-		if (dev_fwnode(sw->dev) == con->fwnode)
-			return sw;
+		dev = class_find_device(&typec_mux_class, NULL, con->fwnode,
+					switch_fwnode_match);
+	} else {
+		dev = class_find_device(&typec_mux_class, NULL,
+					con->endpoint[ep], name_match);
+	}
 
-	return con->id ? ERR_PTR(-EPROBE_DEFER) : NULL;
+	return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
 }
 
 /**
@@ -59,14 +71,10 @@ struct typec_switch *typec_switch_get(struct device *dev)
 {
 	struct typec_switch *sw;
 
-	mutex_lock(&switch_lock);
 	sw = device_connection_find_match(dev, "orientation-switch", NULL,
 					  typec_switch_match);
-	if (!IS_ERR_OR_NULL(sw)) {
-		WARN_ON(!try_module_get(sw->dev->driver->owner));
-		get_device(sw->dev);
-	}
-	mutex_unlock(&switch_lock);
+	if (!IS_ERR_OR_NULL(sw))
+		WARN_ON(!try_module_get(sw->dev.parent->driver->owner));
 
 	return sw;
 }
@@ -81,28 +89,64 @@ EXPORT_SYMBOL_GPL(typec_switch_get);
 void typec_switch_put(struct typec_switch *sw)
 {
 	if (!IS_ERR_OR_NULL(sw)) {
-		module_put(sw->dev->driver->owner);
-		put_device(sw->dev);
+		module_put(sw->dev.parent->driver->owner);
+		put_device(&sw->dev);
 	}
 }
 EXPORT_SYMBOL_GPL(typec_switch_put);
 
+static void typec_switch_release(struct device *dev)
+{
+	kfree(to_typec_switch(dev));
+}
+
+static const struct device_type typec_switch_dev_type = {
+	.name = "orientation_switch",
+	.release = typec_switch_release,
+};
+
 /**
  * typec_switch_register - Register USB Type-C orientation switch
- * @sw: USB Type-C orientation switch
+ * @parent: Parent device
+ * @desc: Orientation switch description
  *
  * This function registers a switch that can be used for routing the correct
  * data pairs depending on the cable plug orientation from the USB Type-C
  * connector to the USB controllers. USB Type-C plugs can be inserted
  * right-side-up or upside-down.
  */
-int typec_switch_register(struct typec_switch *sw)
+struct typec_switch *
+typec_switch_register(struct device *parent,
+		      const struct typec_switch_desc *desc)
 {
-	mutex_lock(&switch_lock);
-	list_add_tail(&sw->entry, &switch_list);
-	mutex_unlock(&switch_lock);
+	struct typec_switch *sw;
+	int ret;
+
+	if (!desc || !desc->set)
+		return ERR_PTR(-EINVAL);
+
+	sw = kzalloc(sizeof(*sw), GFP_KERNEL);
+	if (!sw)
+		return ERR_PTR(-ENOMEM);
 
-	return 0;
+	sw->set = desc->set;
+
+	device_initialize(&sw->dev);
+	sw->dev.parent = parent;
+	sw->dev.fwnode = desc->fwnode;
+	sw->dev.class = &typec_mux_class;
+	sw->dev.type = &typec_switch_dev_type;
+	sw->dev.driver_data = desc->drvdata;
+	dev_set_name(&sw->dev, "%s-switch", dev_name(parent));
+
+	ret = device_add(&sw->dev);
+	if (ret) {
+		dev_err(parent, "failed to register switch (%d)\n", ret);
+		put_device(&sw->dev);
+		return ERR_PTR(ret);
+	}
+
+	return sw;
 }
 EXPORT_SYMBOL_GPL(typec_switch_register);
 
@@ -114,28 +158,44 @@ EXPORT_SYMBOL_GPL(typec_switch_register);
  */
 void typec_switch_unregister(struct typec_switch *sw)
 {
-	mutex_lock(&switch_lock);
-	list_del(&sw->entry);
-	mutex_unlock(&switch_lock);
+	if (!IS_ERR_OR_NULL(sw))
+		device_unregister(&sw->dev);
 }
 EXPORT_SYMBOL_GPL(typec_switch_unregister);
 
+void typec_switch_set_drvdata(struct typec_switch *sw, void *data)
+{
+	dev_set_drvdata(&sw->dev, data);
+}
+EXPORT_SYMBOL_GPL(typec_switch_set_drvdata);
+
+void *typec_switch_get_drvdata(struct typec_switch *sw)
+{
+	return dev_get_drvdata(&sw->dev);
+}
+EXPORT_SYMBOL_GPL(typec_switch_get_drvdata);
+
 /* ------------------------------------------------------------------------- */
 
+static int mux_fwnode_match(struct device *dev, const void *fwnode)
+{
+	return dev_fwnode(dev) == fwnode && dev_name_ends_with(dev, "-mux");
+}
+
 static void *typec_mux_match(struct device_connection *con, int ep, void *data)
 {
 	const struct typec_altmode_desc *desc = data;
-	struct typec_mux *mux;
-	int nval;
+	struct device *dev;
 	bool match;
+	int nval;
 	u16 *val;
 	int i;
 
 	if (!con->fwnode) {
-		list_for_each_entry(mux, &mux_list, entry)
-			if (!strcmp(con->endpoint[ep], dev_name(mux->dev)))
-				return mux;
-		return ERR_PTR(-EPROBE_DEFER);
+		dev = class_find_device(&typec_mux_class, NULL,
+					con->endpoint[ep], name_match);
+
+		return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
 	}
 
 	/*
@@ -180,11 +240,10 @@ static void *typec_mux_match(struct device_connection *con, int ep, void *data)
 	return NULL;
 
 find_mux:
-	list_for_each_entry(mux, &mux_list, entry)
-		if (dev_fwnode(mux->dev) == con->fwnode)
-			return mux;
+	dev = class_find_device(&typec_mux_class, NULL, con->fwnode,
+				mux_fwnode_match);
 
-	return ERR_PTR(-EPROBE_DEFER);
+	return dev ? to_typec_switch(dev) : ERR_PTR(-EPROBE_DEFER);
 }
 
 /**
@@ -202,14 +261,10 @@ struct typec_mux *typec_mux_get(struct device *dev,
 {
 	struct typec_mux *mux;
 
-	mutex_lock(&mux_lock);
 	mux = device_connection_find_match(dev, "mode-switch", (void *)desc,
 					   typec_mux_match);
-	if (!IS_ERR_OR_NULL(mux)) {
-		WARN_ON(!try_module_get(mux->dev->driver->owner));
-		get_device(mux->dev);
-	}
-	mutex_unlock(&mux_lock);
+	if (!IS_ERR_OR_NULL(mux))
+		WARN_ON(!try_module_get(mux->dev.parent->driver->owner));
 
 	return mux;
 }
@@ -224,28 +279,63 @@ EXPORT_SYMBOL_GPL(typec_mux_get);
 void typec_mux_put(struct typec_mux *mux)
 {
 	if (!IS_ERR_OR_NULL(mux)) {
-		module_put(mux->dev->driver->owner);
-		put_device(mux->dev);
+		module_put(mux->dev.parent->driver->owner);
+		put_device(&mux->dev);
 	}
 }
 EXPORT_SYMBOL_GPL(typec_mux_put);
 
+static void typec_mux_release(struct device *dev)
+{
+	kfree(to_typec_mux(dev));
+}
+
+static const struct device_type typec_mux_dev_type = {
+	.name = "mode_switch",
+	.release = typec_mux_release,
+};
+
 /**
  * typec_mux_register - Register Multiplexer routing USB Type-C pins
- * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ * @parent: Parent device
+ * @desc: Multiplexer description
  *
  * USB Type-C connectors can be used for alternate modes of operation besides
  * USB when Accessory/Alternate Modes are supported. With some of those modes,
  * the pins on the connector need to be reconfigured. This function registers
  * multiplexer switches routing the pins on the connector.
  */
-int typec_mux_register(struct typec_mux *mux)
+struct typec_mux *
+typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
 {
-	mutex_lock(&mux_lock);
-	list_add_tail(&mux->entry, &mux_list);
-	mutex_unlock(&mux_lock);
+	struct typec_mux *mux;
+	int ret;
+
+	if (!desc || !desc->set)
+		return ERR_PTR(-EINVAL);
+
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+	if (!mux)
+		return ERR_PTR(-ENOMEM);
+
+	mux->set = desc->set;
+
+	device_initialize(&mux->dev);
+	mux->dev.parent = parent;
+	mux->dev.fwnode = desc->fwnode;
+	mux->dev.class = &typec_mux_class;
+	mux->dev.type = &typec_mux_dev_type;
+	mux->dev.driver_data = desc->drvdata;
+	dev_set_name(&mux->dev, "%s-mux", dev_name(parent));
+
+	ret = device_add(&mux->dev);
+	if (ret) {
+		dev_err(parent, "failed to register mux (%d)\n", ret);
+		put_device(&mux->dev);
+		return ERR_PTR(ret);
+	}
 
-	return 0;
+	return mux;
 }
 EXPORT_SYMBOL_GPL(typec_mux_register);
 
@@ -257,8 +347,24 @@ EXPORT_SYMBOL_GPL(typec_mux_register);
  */
 void typec_mux_unregister(struct typec_mux *mux)
 {
-	mutex_lock(&mux_lock);
-	list_del(&mux->entry);
-	mutex_unlock(&mux_lock);
+	if (!IS_ERR_OR_NULL(mux))
+		device_unregister(&mux->dev);
 }
 EXPORT_SYMBOL_GPL(typec_mux_unregister);
+
+void typec_mux_set_drvdata(struct typec_mux *mux, void *data)
+{
+	dev_set_drvdata(&mux->dev, data);
+}
+EXPORT_SYMBOL_GPL(typec_mux_set_drvdata);
+
+void *typec_mux_get_drvdata(struct typec_mux *mux)
+{
+	return dev_get_drvdata(&mux->dev);
+}
+EXPORT_SYMBOL_GPL(typec_mux_get_drvdata);
+
+struct class typec_mux_class = {
+	.name = "typec_mux",
+	.owner = THIS_MODULE,
+};

drivers/usb/typec/mux/pi3usb30532.c

@@ -23,8 +23,8 @@
 struct pi3usb30532 {
 	struct i2c_client *client;
 	struct mutex lock; /* protects the cached conf register */
-	struct typec_switch sw;
-	struct typec_mux mux;
+	struct typec_switch *sw;
+	struct typec_mux *mux;
 	u8 conf;
 };
 
@@ -48,7 +48,7 @@ static int pi3usb30532_set_conf(struct pi3usb30532 *pi, u8 new_conf)
 static int pi3usb30532_sw_set(struct typec_switch *sw,
 			      enum typec_orientation orientation)
 {
-	struct pi3usb30532 *pi = container_of(sw, struct pi3usb30532, sw);
+	struct pi3usb30532 *pi = typec_switch_get_drvdata(sw);
 	u8 new_conf;
 	int ret;
 
@@ -75,7 +75,7 @@ static int pi3usb30532_sw_set(struct typec_switch *sw,
 
 static int pi3usb30532_mux_set(struct typec_mux *mux, int state)
 {
-	struct pi3usb30532 *pi = container_of(mux, struct pi3usb30532, mux);
+	struct pi3usb30532 *pi = typec_mux_get_drvdata(mux);
 	u8 new_conf;
 	int ret;
 
@@ -113,6 +113,8 @@ static int pi3usb30532_mux_set(struct typec_mux *mux, int state)
 static int pi3usb30532_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
+	struct typec_switch_desc sw_desc;
+	struct typec_mux_desc mux_desc;
 	struct pi3usb30532 *pi;
 	int ret;
 
@@ -121,10 +123,6 @@ static int pi3usb30532_probe(struct i2c_client *client)
 		return -ENOMEM;
 
 	pi->client = client;
-	pi->sw.dev = dev;
-	pi->sw.set = pi3usb30532_sw_set;
-	pi->mux.dev = dev;
-	pi->mux.set = pi3usb30532_mux_set;
 	mutex_init(&pi->lock);
 
 	ret = i2c_smbus_read_byte_data(client, PI3USB30532_CONF);
@@ -134,17 +132,27 @@ static int pi3usb30532_probe(struct i2c_client *client)
 	}
 	pi->conf = ret;
 
-	ret = typec_switch_register(&pi->sw);
-	if (ret) {
-		dev_err(dev, "Error registering typec switch: %d\n", ret);
-		return ret;
+	sw_desc.drvdata = pi;
+	sw_desc.fwnode = dev->fwnode;
+	sw_desc.set = pi3usb30532_sw_set;
+
+	pi->sw = typec_switch_register(dev, &sw_desc);
+	if (IS_ERR(pi->sw)) {
+		dev_err(dev, "Error registering typec switch: %ld\n",
+			PTR_ERR(pi->sw));
+		return PTR_ERR(pi->sw);
 	}
 
-	ret = typec_mux_register(&pi->mux);
-	if (ret) {
-		typec_switch_unregister(&pi->sw);
-		dev_err(dev, "Error registering typec mux: %d\n", ret);
-		return ret;
+	mux_desc.drvdata = pi;
+	mux_desc.fwnode = dev->fwnode;
+	mux_desc.set = pi3usb30532_mux_set;
+
+	pi->mux = typec_mux_register(dev, &mux_desc);
+	if (IS_ERR(pi->mux)) {
+		typec_switch_unregister(pi->sw);
+		dev_err(dev, "Error registering typec mux: %ld\n",
+			PTR_ERR(pi->mux));
+		return PTR_ERR(pi->mux);
 	}
 
 	i2c_set_clientdata(client, pi);
@@ -155,8 +163,8 @@ static int pi3usb30532_remove(struct i2c_client *client)
 {
 	struct pi3usb30532 *pi = i2c_get_clientdata(client);
 
-	typec_mux_unregister(&pi->mux);
-	typec_switch_unregister(&pi->sw);
+	typec_mux_unregister(pi->mux);
+	typec_switch_unregister(pi->sw);
 	return 0;
 }
 

include/linux/device.h

@@ -1255,6 +1255,8 @@ extern int device_for_each_child_reverse(struct device *dev, void *data,
 		     int (*fn)(struct device *dev, void *data));
 extern struct device *device_find_child(struct device *dev, void *data,
 				int (*match)(struct device *dev, void *data));
+extern struct device *device_find_child_by_name(struct device *parent,
+						const char *name);
 extern int device_rename(struct device *dev, const char *new_name);
 extern int device_move(struct device *dev, struct device *new_parent,
 		       enum dpm_order dpm_order);

include/linux/property.h

@@ -76,6 +76,10 @@ int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode,
 				       unsigned int nargs, unsigned int index,
 				       struct fwnode_reference_args *args);
 
+struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
+					    const char *name,
+					    unsigned int index);
+
 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
 struct fwnode_handle *fwnode_get_next_parent(
 	struct fwnode_handle *fwnode);
@@ -141,6 +145,26 @@ static inline int device_property_read_u64(struct device *dev,
 	return device_property_read_u64_array(dev, propname, val, 1);
 }
 
+static inline int device_property_count_u8(struct device *dev, const char *propname)
+{
+	return device_property_read_u8_array(dev, propname, NULL, 0);
+}
+
+static inline int device_property_count_u16(struct device *dev, const char *propname)
+{
+	return device_property_read_u16_array(dev, propname, NULL, 0);
+}
+
+static inline int device_property_count_u32(struct device *dev, const char *propname)
+{
+	return device_property_read_u32_array(dev, propname, NULL, 0);
+}
+
+static inline int device_property_count_u64(struct device *dev, const char *propname)
+{
+	return device_property_read_u64_array(dev, propname, NULL, 0);
+}
+
 static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
 					     const char *propname)
 {
@@ -171,6 +195,30 @@ static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
 	return fwnode_property_read_u64_array(fwnode, propname, val, 1);
 }
 
+static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
+					   const char *propname)
+{
+	return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
+}
+
+static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
+					    const char *propname)
+{
+	return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
+}
+
+static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
+					    const char *propname)
+{
+	return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
+}
+
+static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
+					    const char *propname)
+{
+	return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
+}
+
 /**
  * struct property_entry - "Built-in" device property representation.
  * @name: Name of the property.
@@ -329,7 +377,54 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
 /* -------------------------------------------------------------------------- */
 /* Software fwnode support - when HW description is incomplete or missing */
 
+struct software_node;
+
+/**
+ * struct software_node_ref_args - Reference with additional arguments
+ * @node: Reference to a software node
+ * @nargs: Number of elements in @args array
+ * @args: Integer arguments
+ */
+struct software_node_ref_args {
+	const struct software_node *node;
+	unsigned int nargs;
+	u64 args[NR_FWNODE_REFERENCE_ARGS];
+};
+
+/**
+ * struct software_node_reference - Named software node reference property
+ * @name: Name of the property
+ * @nrefs: Number of elements in @refs array
+ * @refs: Array of references with optional arguments
+ */
+struct software_node_reference {
+	const char *name;
+	unsigned int nrefs;
+	const struct software_node_ref_args *refs;
+};
+
+/**
+ * struct software_node - Software node description
+ * @name: Name of the software node
+ * @parent: Parent of the software node
+ * @properties: Array of device properties
+ * @references: Array of software node reference properties
+ */
+struct software_node {
+	const char *name;
+	const struct software_node *parent;
+	const struct property_entry *properties;
+	const struct software_node_reference *references;
+};
+
 bool is_software_node(const struct fwnode_handle *fwnode);
+const struct software_node *to_software_node(struct fwnode_handle *fwnode);
+struct fwnode_handle *software_node_fwnode(const struct software_node *node);
+
+int software_node_register_nodes(const struct software_node *nodes);
+void software_node_unregister_nodes(const struct software_node *nodes);
+
+int software_node_register(const struct software_node *node);
 
 int software_node_notify(struct device *dev, unsigned long action);
 

include/linux/usb/typec_mux.h

@@ -3,54 +3,48 @@
 #ifndef __USB_TYPEC_MUX
 #define __USB_TYPEC_MUX
 
-#include <linux/list.h>
 #include <linux/usb/typec.h>
 
 struct device;
+struct typec_mux;
+struct typec_switch;
+struct fwnode_handle;
 
-/**
- * struct typec_switch - USB Type-C cable orientation switch
- * @dev: Switch device
- * @entry: List entry
- * @set: Callback to the driver for setting the orientation
- *
- * USB Type-C pin flipper switch routing the correct data pairs from the
- * connector to the USB controller depending on the orientation of the cable
- * plug.
- */
-struct typec_switch {
-	struct device *dev;
-	struct list_head entry;
-
-	int (*set)(struct typec_switch *sw, enum typec_orientation orientation);
-};
+typedef int (*typec_switch_set_fn_t)(struct typec_switch *sw,
+				     enum typec_orientation orientation);
 
-/**
- * struct typec_switch - USB Type-C connector pin mux
- * @dev: Mux device
- * @entry: List entry
- * @set: Callback to the driver for setting the state of the mux
- *
- * Pin Multiplexer/DeMultiplexer switch routing the USB Type-C connector pins to
- * different components depending on the requested mode of operation. Used with
- * Accessory/Alternate modes.
- */
-struct typec_mux {
-	struct device *dev;
-	struct list_head entry;
-
-	int (*set)(struct typec_mux *mux, int state);
+struct typec_switch_desc {
+	struct fwnode_handle *fwnode;
+	typec_switch_set_fn_t set;
+	void *drvdata;
 };
 
 struct typec_switch *typec_switch_get(struct device *dev);
 void typec_switch_put(struct typec_switch *sw);
-int typec_switch_register(struct typec_switch *sw);
+struct typec_switch *
+typec_switch_register(struct device *parent,
+		      const struct typec_switch_desc *desc);
 void typec_switch_unregister(struct typec_switch *sw);
 
+void typec_switch_set_drvdata(struct typec_switch *sw, void *data);
+void *typec_switch_get_drvdata(struct typec_switch *sw);
+
+typedef int (*typec_mux_set_fn_t)(struct typec_mux *mux, int state);
+
+struct typec_mux_desc {
+	struct fwnode_handle *fwnode;
+	typec_mux_set_fn_t set;
+	void *drvdata;
+};
+
 struct typec_mux *
 typec_mux_get(struct device *dev, const struct typec_altmode_desc *desc);
 void typec_mux_put(struct typec_mux *mux);
-int typec_mux_register(struct typec_mux *mux);
+struct typec_mux *
+typec_mux_register(struct device *parent, const struct typec_mux_desc *desc);
 void typec_mux_unregister(struct typec_mux *mux);
 
+void typec_mux_set_drvdata(struct typec_mux *mux, void *data);
+void *typec_mux_get_drvdata(struct typec_mux *mux);
+
 #endif /* __USB_TYPEC_MUX */