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phy: core: add notify_connect and notify_disconnect callback

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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: Stanley Chang <stanley_chang@realtek.com>
Link: https://lore.kernel.org/r/20231213031203.4911-1-stanley_chang@realtek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stanley Chang 2023-12-13 11:10:06 +08:00 committed by Greg Kroah-Hartman
parent bec7e43b16
commit 5de5f1e292
2 changed files with 68 additions and 0 deletions
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47
drivers/phy/phy-core.c
View file

@ -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()

21
include/linux/phy/phy.h
View file

@ -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)
{