Commit 5de5f1e2 authored by Stanley Chang's avatar Stanley Chang Committed by Greg Kroah-Hartman
Browse files

phy: core: add notify_connect and notify_disconnect callback 



In Realtek SoC, the parameter of usb phy is designed to be able to
do dynamic tuning based in the port status. Therefore, add a notify
callback of phy driver when usb connection/disconnection change.

Signed-off-by: default avatarStanley Chang <stanley_chang@realtek.com>
Link: https://lore.kernel.org/r/20231213031203.4911-1-stanley_chang@realtek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bec7e43b

drivers/phy/phy-core.c

+47 −0
Original line number Diff line number Diff line
@@ -489,6 +489,53 @@ int phy_calibrate(struct phy *phy) 
}

EXPORT_SYMBOL_GPL(phy_calibrate);



/**

 * phy_notify_connect() - phy connect notification

 * @phy: the phy returned by phy_get()

 * @port: the port index for connect

 *

 * If the phy needs to get connection status, the callback can be used.

 * Returns: %0 if successful, a negative error code otherwise

 */

int phy_notify_connect(struct phy *phy, int port)

{

	int ret;



	if (!phy || !phy->ops->connect)

		return 0;



	mutex_lock(&phy->mutex);

	ret = phy->ops->connect(phy, port);

	mutex_unlock(&phy->mutex);



	return ret;

}

EXPORT_SYMBOL_GPL(phy_notify_connect);



/**

 * phy_notify_disconnect() - phy disconnect notification

 * @phy: the phy returned by phy_get()

 * @port: the port index for disconnect

 *

 * If the phy needs to get connection status, the callback can be used.

 *

 * Returns: %0 if successful, a negative error code otherwise

 */

int phy_notify_disconnect(struct phy *phy, int port)

{

	int ret;



	if (!phy || !phy->ops->disconnect)

		return 0;



	mutex_lock(&phy->mutex);

	ret = phy->ops->disconnect(phy, port);

	mutex_unlock(&phy->mutex);



	return ret;

}

EXPORT_SYMBOL_GPL(phy_notify_disconnect);



/**

 * phy_configure() - Changes the phy parameters

 * @phy: the phy returned by phy_get()

include/linux/phy/phy.h

+21 −0
Original line number Diff line number Diff line
@@ -122,6 +122,11 @@ struct phy_ops { 
			    union phy_configure_opts *opts);

	int	(*reset)(struct phy *phy);

	int	(*calibrate)(struct phy *phy);



	/* notify phy connect status change */

	int	(*connect)(struct phy *phy, int port);

	int	(*disconnect)(struct phy *phy, int port);



	void	(*release)(struct phy *phy);

	struct module *owner;

};
@@ -243,6 +248,8 @@ static inline enum phy_mode phy_get_mode(struct phy *phy) 
}

int phy_reset(struct phy *phy);

int phy_calibrate(struct phy *phy);

int phy_notify_connect(struct phy *phy, int port);

int phy_notify_disconnect(struct phy *phy, int port);

static inline int phy_get_bus_width(struct phy *phy)

{

	return phy->attrs.bus_width;
@@ -396,6 +403,20 @@ static inline int phy_calibrate(struct phy *phy) 
	return -ENOSYS;

}



static inline int phy_notify_connect(struct phy *phy, int index)

{

	if (!phy)

		return 0;

	return -ENOSYS;

}



static inline int phy_notify_disconnect(struct phy *phy, int index)

{

	if (!phy)

		return 0;

	return -ENOSYS;

}



static inline int phy_configure(struct phy *phy,

				union phy_configure_opts *opts)

{