In Realtek SoC, the parameter of usb phy is designed to can dynamic
tuning base on port status. Therefore, add a notify callback of phy
driver when usb connection/disconnection change.
Signed-off-by: Stanley Chang <stanley_chang@xxxxxxxxxxx>
---
RESEND:
Because there is no extcon device provided in the USB framework to
notify connect and disconnect.
Therefore, I added the notification connection/disconnection based
on the generic phy. So I no use the EXTCON framework for notifying
connect/disconnect.
v2 to v3:
No change
v1 to v2:
No change
---
drivers/phy/phy-core.c | 47 +++++++++++++++++++++++++++++++++++++++++
include/linux/phy/phy.h | 18 ++++++++++++++++
2 files changed, 65 insertions(+)
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 96a0b1e111f3..a84ad4896b7f 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -489,6 +489,53 @@ int phy_calibrate(struct phy *phy)
}
EXPORT_SYMBOL_GPL(phy_calibrate);
+/**
+ * phy_notify_connect() - phy connect notify
+ * @phy: the phy returned by phy_get()
+ * @port: the port index for connect
+ *
+ * If phy need the 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 notify
+ * @phy: the phy returned by phy_get()
+ * @port: the port index for disconnect
+ *
+ * If phy need the get disconnection 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()
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index f6d607ef0e80..cf98cb29ddaa 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -122,6 +122,8 @@ struct phy_ops {
union phy_configure_opts *opts);
int (*reset)(struct phy *phy);
int (*calibrate)(struct phy *phy);
+ int (*connect)(struct phy *phy, int port);
+ int (*disconnect)(struct phy *phy, int port);
void (*release)(struct phy *phy);
struct module *owner;
};
@@ -243,6 +245,8 @@ 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 +400,20 @@ 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)
{
--
2.34.1
