usb: phy: introduce usb_phy_set_event interface

PHY drivers require a generic interface to handle per-PHY events.

usb_phy_set_event interface sets event to phy event.
PHY drivers call this interface for each phy event.

Cc: Felipe Balbi <ba...@ti.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: linux-ker...@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: Android Kernel Team <kernel-t...@android.com>
Cc: John Stultz <john.stu...@linaro.org>
Cc: Sumit Semwal <sumit.sem...@linaro.org>
Cc: Arve Hj�nnev�g <a...@android.com>
Cc: Benoit Goby <ben...@android.com>
[Original patch in Android from Todd]
Cc: Todd Poynor <toddpoy...@google.com>
Signed-off-by: Kiran Raparthy <kiran.ku...@linaro.org>
---
 drivers/usb/phy/phy.c   | 12 ++++++++++++
 include/linux/usb/phy.h |  5 +++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index 045cd30..2b1039e 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -444,3 +444,15 @@ int usb_bind_phy(const char *dev_name, u8 index,
        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();
+ *
+ * This sets event to phy event
+ */
+void usb_phy_set_event(struct usb_phy *x, unsigned long event)
+{
+       x->last_event = event;
+}
+EXPORT_SYMBOL_GPL(usb_phy_set_event);
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index 353053a..3c713ff 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -210,6 +210,7 @@ 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);
 #else
 static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
 {
@@ -251,6 +252,10 @@ static inline int usb_bind_phy(const char *dev_name, u8 
index,
 {
        return -EOPNOTSUPP;
 }
+
+static inline void usb_phy_set_event(struct usb_phy *x, unsigned long event)
+{
+}
 #endif
 
 static inline int
-- 
1.8.2.1

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