Merge commit '8700c95adb03' into timers/nohz

The full dynticks tree needs the latest RCU and sched
upstream updates in order to fix some dependencies.

Merge a common upstream merge point that has these
updates.

Conflicts:
	include/linux/perf_event.h
	kernel/rcutree.h
	kernel/rcutree_plugin.h

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

16 files changed, 234 insertions, 31 deletions

diff --git a/include/linux/usb/cdc-wdm.h b/include/linux/usb/cdc-wdm.h
index 719c332620fa..0b3f4295c025 100644
--- a/include/linux/usb/cdc-wdm.h
+++ b/include/linux/usb/cdc-wdm.h
@@ -11,6 +11,8 @@
 #ifndef __LINUX_USB_CDC_WDM_H
 #define __LINUX_USB_CDC_WDM_H
 
+#include <uapi/linux/usb/cdc-wdm.h>
+
 extern struct usb_driver *usb_cdc_wdm_register(struct usb_interface *intf,
                                         struct usb_endpoint_descriptor *ep,
                                         int bufsize,
diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h
index 3b8f9d4fc3fe..cc25b70af33c 100644
--- a/include/linux/usb/cdc_ncm.h
+++ b/include/linux/usb/cdc_ncm.h
@@ -127,6 +127,7 @@ struct cdc_ncm_ctx {
         u16 connected;
 };
 
+extern u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf);
 extern int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting);
 extern void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf);
 extern struct sk_buff *cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign);
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 9c210f2283df..27603bcbb9b9 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -43,4 +43,13 @@
  */
 extern const char *usb_speed_string(enum usb_device_speed speed);
 
+
+/**
+ * usb_state_string - Returns human readable name for the state.
+ * @state: The state to return a human-readable name for. If it's not
+ *      any of the states devices in usb_device_state_string enum,
+ *      the string UNKNOWN will be returned.
+ */
+extern const char *usb_state_string(enum usb_device_state state);
+
 #endif /* __LINUX_USB_CH9_H */
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 3c671c1b37f6..5e61589fc166 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -39,6 +39,7 @@
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/log2.h>
+#include <linux/configfs.h>
 
 /*
  * USB function drivers should return USB_GADGET_DELAYED_STATUS if they
@@ -60,7 +61,7 @@ struct usb_configuration;
  * @name: For diagnostics, identifies the function.
  * @strings: tables of strings, keyed by identifiers assigned during bind()
  *      and by language IDs provided in control requests
- * @descriptors: Table of full (or low) speed descriptors, using interface and
+ * @fs_descriptors: Table of full (or low) speed descriptors, using interface and
  *      string identifiers assigned during @bind().  If this pointer is null,
  *      the function will not be available at full speed (or at low speed).
  * @hs_descriptors: Table of high speed descriptors, using interface and
@@ -290,6 +291,7 @@ enum {
  *      after function notifications
  * @resume: Notifies configuration when the host restarts USB traffic,
  *      before function notifications
+ * @gadget_driver: Gadget driver controlling this driver
  *
  * Devices default to reporting self powered operation.  Devices which rely
  * on bus powered operation should report this in their @bind method.
@@ -463,6 +465,8 @@ struct usb_function_driver {
 };
 
 struct usb_function_instance {
+        struct config_group group;
+        struct list_head cfs_list;
         struct usb_function_driver *fd;
         void (*free_func_inst)(struct usb_function_instance *inst);
 };
diff --git a/include/linux/usb/dwc3-omap.h b/include/linux/usb/dwc3-omap.h
index 51eae14477f7..5615f4d82724 100644
--- a/include/linux/usb/dwc3-omap.h
+++ b/include/linux/usb/dwc3-omap.h
@@ -19,11 +19,11 @@ enum omap_dwc3_vbus_id_status {
 };
 
 #if (defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_DWC3_MODULE))
-extern void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
+extern int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
 #else
-static inline void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
+static inline int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
 {
-        return;
+        return -ENODEV;
 }
 #endif
 
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 2e297e80d59a..c454a88abf2e 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -482,6 +482,7 @@ struct usb_gadget_ops {
  * @speed: Speed of current connection to USB host.
  * @max_speed: Maximal speed the UDC can handle.  UDC must support this
  *      and all slower speeds.
+ * @state: the state we are now (attached, suspended, configured, etc)
  * @sg_supported: true if we can handle scatter-gather
  * @is_otg: True if the USB device port uses a Mini-AB jack, so that the
  *      gadget driver must provide a USB OTG descriptor.
@@ -525,6 +526,7 @@ struct usb_gadget {
         struct list_head                ep_list;        /* of usb_ep */
         enum usb_device_speed           speed;
         enum usb_device_speed           max_speed;
+        enum usb_device_state           state;
         unsigned                        sg_supported:1;
         unsigned                        is_otg:1;
         unsigned                        is_a_peripheral:1;
@@ -872,6 +874,8 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver);
  */
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver);
 
+extern int usb_add_gadget_udc_release(struct device *parent,
+                struct usb_gadget *gadget, void (*release)(struct device *dev));
 extern int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget);
 extern void usb_del_gadget_udc(struct usb_gadget *gadget);
 extern int udc_attach_driver(const char *name,
@@ -959,6 +963,13 @@ extern void usb_gadget_unmap_request(struct usb_gadget *gadget,
 
 /*-------------------------------------------------------------------------*/
 
+/* utility to set gadget state properly */
+
+extern void usb_gadget_set_state(struct usb_gadget *gadget,
+                enum usb_device_state state);
+
+/*-------------------------------------------------------------------------*/
+
 /* utility wrapping a simple endpoint selection policy */
 
 extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *,
diff --git a/include/linux/usb/gadget_configfs.h b/include/linux/usb/gadget_configfs.h
new file mode 100644
index 000000000000..d74c0ae989d5
--- /dev/null
+++ b/include/linux/usb/gadget_configfs.h
@@ -0,0 +1,110 @@
+#ifndef __GADGET_CONFIGFS__
+#define __GADGET_CONFIGFS__
+
+#include <linux/configfs.h>
+
+int check_user_usb_string(const char *name,
+                struct usb_gadget_strings *stringtab_dev);
+
+#define GS_STRINGS_W(__struct, __name)  \
+        static ssize_t __struct##_##__name##_store(struct __struct *gs, \
+                const char *page, size_t len)           \
+{                                                       \
+        int ret;                                        \
+                                                        \
+        ret = usb_string_copy(page, &gs->__name);       \
+        if (ret)                                        \
+                return ret;                             \
+        return len;                                     \
+}
+
+#define GS_STRINGS_R(__struct, __name)  \
+        static ssize_t __struct##_##__name##_show(struct __struct *gs, \
+                        char *page)     \
+{       \
+        return sprintf(page, "%s\n", gs->__name ?: ""); \
+}
+
+#define GS_STRING_ITEM_ATTR(struct_name, name)  \
+        static struct struct_name##_attribute struct_name##_##name = \
+                __CONFIGFS_ATTR(name,  S_IRUGO | S_IWUSR,               \
+                                struct_name##_##name##_show,            \
+                                struct_name##_##name##_store)
+
+#define GS_STRINGS_RW(struct_name, _name)       \
+        GS_STRINGS_R(struct_name, _name)        \
+        GS_STRINGS_W(struct_name, _name)        \
+        GS_STRING_ITEM_ATTR(struct_name, _name)
+
+#define USB_CONFIG_STRING_RW_OPS(struct_in)                             \
+        CONFIGFS_ATTR_OPS(struct_in);                                   \
+                                                                        \
+static struct configfs_item_operations struct_in##_langid_item_ops = {  \
+        .release                = struct_in##_attr_release,             \
+        .show_attribute         = struct_in##_attr_show,                \
+        .store_attribute        = struct_in##_attr_store,               \
+};                                                                      \
+                                                                        \
+static struct config_item_type struct_in##_langid_type = {              \
+        .ct_item_ops    = &struct_in##_langid_item_ops,                 \
+        .ct_attrs       = struct_in##_langid_attrs,                     \
+        .ct_owner       = THIS_MODULE,                                  \
+}
+
+#define USB_CONFIG_STRINGS_LANG(struct_in, struct_member)       \
+        static struct config_group *struct_in##_strings_make(           \
+                        struct config_group *group,                     \
+                        const char *name)                               \
+        {                                                               \
+        struct struct_member *gi;                                       \
+        struct struct_in *gs;                                           \
+        struct struct_in *new;                                          \
+        int langs = 0;                                                  \
+        int ret;                                                        \
+                                                                        \
+        new = kzalloc(sizeof(*new), GFP_KERNEL);                        \
+        if (!new)                                                       \
+                return ERR_PTR(-ENOMEM);                                \
+                                                                        \
+        ret = check_user_usb_string(name, &new->stringtab_dev);         \
+        if (ret)                                                        \
+                goto err;                                               \
+        config_group_init_type_name(&new->group, name,                  \
+                        &struct_in##_langid_type);                      \
+                                                                        \
+        gi = container_of(group, struct struct_member, strings_group);  \
+        ret = -EEXIST;                                                  \
+        list_for_each_entry(gs, &gi->string_list, list) {               \
+                if (gs->stringtab_dev.language == new->stringtab_dev.language) \
+                        goto err;                                       \
+                langs++;                                                \
+        }                                                               \
+        ret = -EOVERFLOW;                                               \
+        if (langs >= MAX_USB_STRING_LANGS)                              \
+                goto err;                                               \
+                                                                        \
+        list_add_tail(&new->list, &gi->string_list);                    \
+        return &new->group;                                             \
+err:                                                                    \
+        kfree(new);                                                     \
+        return ERR_PTR(ret);                                            \
+}                                                                       \
+                                                                        \
+static void struct_in##_strings_drop(                                   \
+                struct config_group *group,                             \
+                struct config_item *item)                               \
+{                                                                       \
+        config_item_put(item);                                          \
+}                                                                       \
+                                                                        \
+static struct configfs_group_operations struct_in##_strings_ops = {     \
+        .make_group     = &struct_in##_strings_make,                    \
+        .drop_item      = &struct_in##_strings_drop,                    \
+};                                                                      \
+                                                                        \
+static struct config_item_type struct_in##_strings_type = {             \
+        .ct_group_ops   = &struct_in##_strings_ops,                     \
+        .ct_owner       = THIS_MODULE,                                  \
+}
+
+#endif
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 0a78df5f6cfd..f5f5c7dfda90 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -84,7 +84,7 @@ struct usb_hcd {
 
         struct timer_list       rh_timer;       /* drives root-hub polling */
         struct urb              *status_urb;    /* the current status urb */
-#ifdef CONFIG_USB_SUSPEND
+#ifdef CONFIG_PM_RUNTIME
         struct work_struct      wakeup_work;    /* for remote wakeup */
 #endif
 
@@ -357,6 +357,7 @@ struct hc_driver {
                  */
         int     (*disable_usb3_lpm_timeout)(struct usb_hcd *,
                         struct usb_device *, enum usb3_link_state state);
+        int     (*find_raw_port_number)(struct usb_hcd *, int);
 };
 
 extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
@@ -396,6 +397,7 @@ extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
 extern int usb_add_hcd(struct usb_hcd *hcd,
                 unsigned int irqnum, unsigned long irqflags);
 extern void usb_remove_hcd(struct usb_hcd *hcd);
+extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1);
 
 struct platform_device;
 extern void usb_hcd_platform_shutdown(struct platform_device *dev);
@@ -591,14 +593,14 @@ extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
 extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
 #endif /* CONFIG_PM */
 
-#ifdef CONFIG_USB_SUSPEND
+#ifdef CONFIG_PM_RUNTIME
 extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
 #else
 static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
 {
         return;
 }
-#endif /* CONFIG_USB_SUSPEND */
+#endif /* CONFIG_PM_RUNTIME */
 
 /*-------------------------------------------------------------------------*/
 
diff --git a/include/linux/usb/musb-ux500.h b/include/linux/usb/musb-ux500.h
new file mode 100644
index 000000000000..1e2c7130f6e1
--- /dev/null
+++ b/include/linux/usb/musb-ux500.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2013 ST-Ericsson AB
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MUSB_UX500_H__
+#define __MUSB_UX500_H__
+
+enum ux500_musb_vbus_id_status {
+        UX500_MUSB_NONE = 0,
+        UX500_MUSB_VBUS,
+        UX500_MUSB_ID,
+        UX500_MUSB_CHARGER,
+        UX500_MUSB_ENUMERATED,
+        UX500_MUSB_RIDA,
+        UX500_MUSB_RIDB,
+        UX500_MUSB_RIDC,
+        UX500_MUSB_PREPARE,
+        UX500_MUSB_CLEAN,
+};
+
+#endif  /* __MUSB_UX500_H__ */
diff --git a/include/linux/usb/nop-usb-xceiv.h b/include/linux/usb/nop-usb-xceiv.h
index 28884c717411..148d35171aac 100644
--- a/include/linux/usb/nop-usb-xceiv.h
+++ b/include/linux/usb/nop-usb-xceiv.h
@@ -5,6 +5,11 @@
 
 struct nop_usb_xceiv_platform_data {
         enum usb_phy_type type;
+        unsigned long clk_rate;
+
+        /* if set fails with -EPROBE_DEFER if can't get regulator */
+        unsigned int needs_vcc:1;
+        unsigned int needs_reset:1;
 };
 
 #if defined(CONFIG_NOP_USB_XCEIV) || (defined(CONFIG_NOP_USB_XCEIV_MODULE) && defined(MODULE))
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index e8a5fe87c6bd..291e01ba32e5 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -36,14 +36,7 @@ struct usb_otg {
 
 };
 
-#ifdef CONFIG_USB_OTG_UTILS
-extern const char *otg_state_string(enum usb_otg_state state);
-#else
-static inline const char *otg_state_string(enum usb_otg_state state)
-{
-        return NULL;
-}
-#endif
+extern const char *usb_otg_state_string(enum usb_otg_state state);
 
 /* Context: can sleep */
 static inline int
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index 15847cbdb512..6b5978f57633 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -91,6 +91,9 @@ struct usb_phy {
         int     (*init)(struct usb_phy *x);
         void    (*shutdown)(struct usb_phy *x);
 
+        /* enable/disable VBUS */
+        int     (*set_vbus)(struct usb_phy *x, int on);
+
         /* effective for B devices, ignored for A-peripheral */
         int     (*set_power)(struct usb_phy *x,
                                 unsigned mA);
@@ -160,8 +163,26 @@ usb_phy_shutdown(struct usb_phy *x)
                 x->shutdown(x);
 }
 
+static inline int
+usb_phy_vbus_on(struct usb_phy *x)
+{
+        if (!x->set_vbus)
+                return 0;
+
+        return x->set_vbus(x, true);
+}
+
+static inline int
+usb_phy_vbus_off(struct usb_phy *x)
+{
+        if (!x->set_vbus)
+                return 0;
+
+        return x->set_vbus(x, false);
+}
+
 /* for usb host and peripheral controller drivers */
-#ifdef CONFIG_USB_OTG_UTILS
+#if IS_ENABLED(CONFIG_USB_PHY)
 extern struct usb_phy *usb_get_phy(enum usb_phy_type type);
 extern struct usb_phy *devm_usb_get_phy(struct device *dev,
         enum usb_phy_type type);
@@ -176,29 +197,29 @@ extern int usb_bind_phy(const char *dev_name, u8 index,
 #else
 static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
 {
-        return NULL;
+        return ERR_PTR(-ENXIO);
 }
 
 static inline struct usb_phy *devm_usb_get_phy(struct device *dev,
         enum usb_phy_type type)
 {
-        return NULL;
+        return ERR_PTR(-ENXIO);
 }
 
 static inline struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index)
 {
-        return NULL;
+        return ERR_PTR(-ENXIO);
 }
 
 static inline struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index)
 {
-        return NULL;
+        return ERR_PTR(-ENXIO);
 }
 
 static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
         const char *phandle, u8 index)
 {
-        return NULL;
+        return ERR_PTR(-ENXIO);
 }
 
 static inline void usb_put_phy(struct usb_phy *x)
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h
index c5d36c65c33b..e452ba6ec6bd 100644
--- a/include/linux/usb/renesas_usbhs.h
+++ b/include/linux/usb/renesas_usbhs.h
@@ -62,14 +62,14 @@ struct renesas_usbhs_platform_callback {
          * Hardware exit function for platform.
          * it is called when driver was removed
          */
-        void (*hardware_exit)(struct platform_device *pdev);
+        int (*hardware_exit)(struct platform_device *pdev);
 
         /*
          * option:
          *
          * for board specific clock control
          */
-        void (*power_ctrl)(struct platform_device *pdev,
+        int (*power_ctrl)(struct platform_device *pdev,
                            void __iomem *base, int enable);
 
         /*
@@ -77,7 +77,7 @@ struct renesas_usbhs_platform_callback {
          *
          * Phy reset for platform
          */
-        void (*phy_reset)(struct platform_device *pdev);
+        int (*phy_reset)(struct platform_device *pdev);
 
         /*
          * get USB ID function
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ef9be7e1e190..b9b0f7b4e43b 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -15,6 +15,7 @@
 
 #include <linux/kref.h>
 #include <linux/mutex.h>
+#include <linux/serial.h>
 #include <linux/sysrq.h>
 #include <linux/kfifo.h>
 
@@ -61,6 +62,7 @@
  * @bulk_out_buffers: pointers to the bulk out buffers for this port
  * @write_urbs: pointers to the bulk out urbs for this port
  * @write_urbs_free: status bitmap the for bulk out urbs
+ * @icount: interrupt counters
  * @tx_bytes: number of bytes currently in host stack queues
  * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
  *      port.
@@ -108,6 +110,7 @@ struct usb_serial_port {
         unsigned long           write_urbs_free;
         __u8                    bulk_out_endpointAddress;
 
+        struct async_icount     icount;
         int                     tx_bytes;
 
         unsigned long           flags;
@@ -270,6 +273,7 @@ struct usb_serial_driver {
         int  (*tiocmget)(struct tty_struct *tty);
         int  (*tiocmset)(struct tty_struct *tty,
                          unsigned int set, unsigned int clear);
+        int  (*tiocmiwait)(struct tty_struct *tty, unsigned long arg);
         int  (*get_icount)(struct tty_struct *tty,
                         struct serial_icounter_struct *icount);
         /* Called by the tty layer for port level work. There may or may not
@@ -327,8 +331,10 @@ extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
 extern void usb_serial_generic_throttle(struct tty_struct *tty);
 extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
-extern void usb_serial_generic_disconnect(struct usb_serial *serial);
-extern void usb_serial_generic_release(struct usb_serial *serial);
+extern int usb_serial_generic_tiocmiwait(struct tty_struct *tty,
+                                                        unsigned long arg);
+extern int usb_serial_generic_get_icount(struct tty_struct *tty,
+                                        struct serial_icounter_struct *icount);
 extern int usb_serial_generic_register(void);
 extern void usb_serial_generic_deregister(void);
 extern int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,
diff --git a/include/linux/usb/tegra_usb_phy.h b/include/linux/usb/tegra_usb_phy.h
index 9ebebe906925..1b7519a8c0bf 100644
--- a/include/linux/usb/tegra_usb_phy.h
+++ b/include/linux/usb/tegra_usb_phy.h
@@ -61,10 +61,14 @@ struct tegra_usb_phy {
         struct device *dev;
         bool is_legacy_phy;
         bool is_ulpi_phy;
+        void (*set_pts)(struct usb_phy *x, u8 pts_val);
+        void (*set_phcd)(struct usb_phy *x, bool enable);
 };
 
 struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
-        void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode);
+        void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode,
+        void (*set_pts)(struct usb_phy *x, u8 pts_val),
+        void (*set_phcd)(struct usb_phy *x, bool enable));
 
 void tegra_usb_phy_preresume(struct usb_phy *phy);
 
@@ -75,8 +79,4 @@ void tegra_ehci_phy_restore_start(struct usb_phy *phy,
 
 void tegra_ehci_phy_restore_end(struct usb_phy *phy);
 
-void tegra_ehci_set_pts(struct usb_phy *x, u8 pts_val);
-
-void tegra_ehci_set_phcd(struct usb_phy *x, bool enable);
-
 #endif /* __TEGRA_USB_PHY_H */
diff --git a/include/linux/usb/ulpi.h b/include/linux/usb/ulpi.h
index 6f033a415ecb..5c295c26ad37 100644
--- a/include/linux/usb/ulpi.h
+++ b/include/linux/usb/ulpi.h
@@ -181,8 +181,16 @@
 
 /*-------------------------------------------------------------------------*/
 
+#if IS_ENABLED(CONFIG_USB_ULPI)
 struct usb_phy *otg_ulpi_create(struct usb_phy_io_ops *ops,
                                         unsigned int flags);
+#else
+static inline struct usb_phy *otg_ulpi_create(struct usb_phy_io_ops *ops,
+                                              unsigned int flags)
+{
+        return NULL;
+}
+#endif
 
 #ifdef CONFIG_USB_ULPI_VIEWPORT
 /* access ops for controllers with a viewport register */