USB: phy: drop unused legacy controller-phy bind helper

Drop the unused legacy usb_bind_phy() helper whose last user was removed
in 2016 when OMAP moved to device-tree boot (9080b8dc761a ("ARM: OMAP2+:
Remove legacy usb-host.c platform init code")).

Note that this means that for the last couple of years the phy_bind_list
has been empty (when using mainline kernels) and that consequently all
phy lookups using the usb_get_phy_dev() interface have failed with
-ENODEV. This helper along with its current users will be removed by
follow-on patches.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/phy/phy.c

@@ -795,40 +795,6 @@ void usb_remove_phy(struct usb_phy *x)
 }
 EXPORT_SYMBOL_GPL(usb_remove_phy);
 
-/**
- * usb_bind_phy - bind the phy and the controller that uses the phy
- * @dev_name: the device name of the device that will bind to the phy
- * @index: index to specify the port number
- * @phy_dev_name: the device name of the phy
- *
- * Fills the phy_bind structure with the dev_name and phy_dev_name. This will
- * be used when the phy driver registers the phy and when the controller
- * requests this phy.
- *
- * To be used by platform specific initialization code.
- */
-int usb_bind_phy(const char *dev_name, u8 index,
-				const char *phy_dev_name)
-{
-	struct usb_phy_bind *phy_bind;
-	unsigned long flags;
-
-	phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL);
-	if (!phy_bind)
-		return -ENOMEM;
-
-	phy_bind->dev_name = dev_name;
-	phy_bind->phy_dev_name = phy_dev_name;
-	phy_bind->index = index;
-
-	spin_lock_irqsave(&phy_lock, flags);
-	list_add_tail(&phy_bind->list, &phy_bind_list);
-	spin_unlock_irqrestore(&phy_lock, flags);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(usb_bind_phy);
-
 /**
  * usb_phy_set_event - set event to phy event
  * @x: the phy returned by usb_get_phy();

include/linux/usb/phy.h

@@ -242,8 +242,6 @@ extern struct usb_phy *devm_usb_get_phy_by_node(struct device *dev,
 	struct device_node *node, struct notifier_block *nb);
 extern void usb_put_phy(struct usb_phy *);
 extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x);
-extern int usb_bind_phy(const char *dev_name, u8 index,
-				const char *phy_dev_name);
 extern void usb_phy_set_event(struct usb_phy *x, unsigned long event);
 extern void usb_phy_set_charger_current(struct usb_phy *usb_phy,
 					unsigned int mA);
@@ -293,12 +291,6 @@ static inline void devm_usb_put_phy(struct device *dev, struct usb_phy *x)
 {
 }
 
-static inline int usb_bind_phy(const char *dev_name, u8 index,
-				const char *phy_dev_name)
-{
-	return -EOPNOTSUPP;
-}
-
 static inline void usb_phy_set_event(struct usb_phy *x, unsigned long event)
 {
 }