[PATCH 1/4] usb: chipidea: introduce CI_HDRC_CONTROLLER_VBUS_EVENT glue layer use

[Peter Chen <peter.chen@kernel.org>]

From: Peter Chen <peter.chen@nxp.com>

Some vendors glue layer need to handle some events for vbus, eg,
some i.mx platforms (imx7d, imx8mm, imx8mn, etc) needs vbus event
to handle charger detection, its charger detection is finished at
glue layer code, but not at USB PHY driver.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/usb/chipidea/udc.c   | 7 ++++++-
 include/linux/usb/chipidea.h | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 921bcf14dc06..da70fbe7ca4c 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1561,6 +1561,7 @@ static int ci_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
 {
 	struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
 	unsigned long flags;
+	int ret = 0;
 
 	spin_lock_irqsave(&ci->lock, flags);
 	ci->vbus_active = is_active;
@@ -1570,10 +1571,14 @@ static int ci_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
 		usb_phy_set_charger_state(ci->usb_phy, is_active ?
 			USB_CHARGER_PRESENT : USB_CHARGER_ABSENT);
 
+	if (ci->platdata->notify_event)
+		ret = ci->platdata->notify_event(ci,
+				CI_HDRC_CONTROLLER_VBUS_EVENT);
+
 	if (ci->driver)
 		ci_hdrc_gadget_connect(_gadget, is_active);
 
-	return 0;
+	return ret;
 }
 
 static int ci_udc_wakeup(struct usb_gadget *_gadget)
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index edd89b7c8f18..54167a2d28ea 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -67,6 +67,7 @@ struct ci_hdrc_platform_data {
 #define CI_HDRC_CONTROLLER_STOPPED_EVENT	1
 #define CI_HDRC_IMX_HSIC_ACTIVE_EVENT		2
 #define CI_HDRC_IMX_HSIC_SUSPEND_EVENT		3
+#define CI_HDRC_CONTROLLER_VBUS_EVENT		4
 	int	(*notify_event) (struct ci_hdrc *ci, unsigned event);
 	struct regulator	*reg_vbus;
 	struct usb_otg_caps	ci_otg_caps;
-- 
2.17.1