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* [PATCH v1 1/3] usb: phy: add usb phy notify port status API
@ 2023-05-19  4:58 Stanley Chang
  2023-05-19  4:58 ` [PATCH v1 2/3] usb: phy: Add driver for the Realtek SoC USB 2.0/3.0 PHY Stanley Chang
  2023-05-19  4:58 ` [PATCH v1 3/3] dt-bindings: phy: realtek: Add the doc about " Stanley Chang
  0 siblings, 2 replies; 12+ messages in thread
From: Stanley Chang @ 2023-05-19  4:58 UTC (permalink / raw)
  To: Greg Kroah-Hartman
  Cc: Stanley Chang, Vinod Koul, Kishon Vijay Abraham I, Rob Herring,
	Krzysztof Kozlowski, Conor Dooley, Alan Stern, Douglas Anderson,
	Matthias Kaehlcke, Flavio Suligoi, Ray Chi, Michael Grzeschik,
	Bhuvanesh Surachari, Mathias Nyman, Arnd Bergmann, Paul Cercueil,
	Linus Walleij, linux-phy, devicetree, linux-kernel, linux-usb

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 port status change.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
---
 drivers/usb/core/hub.c  | 13 +++++++++++++
 include/linux/usb/phy.h | 14 ++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 97a0f8faea6e..b4fbbeae1927 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -614,6 +614,19 @@ static int hub_ext_port_status(struct usb_hub *hub, int port1, int type,
 		ret = 0;
 	}
 	mutex_unlock(&hub->status_mutex);
+
+	if (!ret) {
+		struct usb_device *hdev = hub->hdev;
+
+		if (hdev && !hdev->parent) {
+			struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
+
+			if (hcd->usb_phy)
+				usb_phy_notify_port_status(hcd->usb_phy,
+					    port1 - 1, *status, *change);
+		}
+	}
+
 	return ret;
 }
 
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index e4de6bc1f69b..53bf3540098f 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -144,6 +144,10 @@ struct usb_phy {
 	 */
 	int	(*set_wakeup)(struct usb_phy *x, bool enabled);
 
+	/* notify phy port status change */
+	int	(*notify_port_status)(struct usb_phy *x,
+		int port, u16 portstatus, u16 portchange);
+
 	/* notify phy connect status change */
 	int	(*notify_connect)(struct usb_phy *x,
 			enum usb_device_speed speed);
@@ -316,6 +320,16 @@ usb_phy_set_wakeup(struct usb_phy *x, bool enabled)
 		return 0;
 }
 
+static inline int
+usb_phy_notify_port_status(struct usb_phy *x, int port, u16 portstatus,
+	    u16 portchange)
+{
+	if (x && x->notify_port_status)
+		return x->notify_port_status(x, port, portstatus, portchange);
+	else
+		return 0;
+}
+
 static inline int
 usb_phy_notify_connect(struct usb_phy *x, enum usb_device_speed speed)
 {
-- 
2.34.1


^ permalink raw reply related	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2023-05-20  9:04 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-05-19  4:58 [PATCH v1 1/3] usb: phy: add usb phy notify port status API Stanley Chang
2023-05-19  4:58 ` [PATCH v1 2/3] usb: phy: Add driver for the Realtek SoC USB 2.0/3.0 PHY Stanley Chang
2023-05-19  6:28   ` Arnd Bergmann
2023-05-19 10:40     ` Stanley Chang[昌育德]
2023-05-19  8:16   ` Paul Cercueil
2023-05-19 10:58     ` Stanley Chang[昌育德]
2023-05-19 11:01       ` Arnd Bergmann
2023-05-19 17:40         ` Vinod Koul
2023-05-20  5:18           ` Stanley Chang[昌育德]
2023-05-20  5:10         ` Stanley Chang[昌育德]
2023-05-20  9:04   ` kernel test robot
2023-05-19  4:58 ` [PATCH v1 3/3] dt-bindings: phy: realtek: Add the doc about " Stanley Chang

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