phy: Introduce to_usbphy conversion function

The generic phy support layer has the necessary list handling
and phy retrieval functions, so we should reuse them for usb
phys. This adds a phy_to_usbphy() conversion function which
drivers can implement which attach to the generic phy layer
and are really usb phys.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 0d78923358..5d96e02df4 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -33,6 +33,7 @@ struct phy_ops {
 	int	(*exit)(struct phy *phy);
 	int	(*power_on)(struct phy *phy);
 	int	(*power_off)(struct phy *phy);
+	struct usb_phy *(*to_usbphy)(struct phy *phy);
 };
 
 /**
@@ -150,6 +151,7 @@ struct phy_provider *__of_phy_provider_register(struct device_d *dev,
 	struct phy * (*of_xlate)(struct device_d *dev,
 	struct of_phandle_args *args));
 void of_phy_provider_unregister(struct phy_provider *phy_provider);
+struct usb_phy *phy_to_usbphy(struct phy *phy);
 #else
 static inline int phy_init(struct phy *phy)
 {
@@ -243,6 +245,12 @@ static inline struct phy_provider *__of_phy_provider_register(
 static inline void of_phy_provider_unregister(struct phy_provider *phy_provider)
 {
 }
+
+static inline struct usb_phy *phy_to_usbphy(struct phy *phy)
+{
+	return NULL;
+}
+
 #endif
 
 #endif /* __DRIVERS_PHY_H */