usb: chipidea: udc: add CI_HDRC_CONTROLLER_PULLUP_EVENT event

The device controller will send CI_HDRC_CONTROLLER_PULLUP_EVENT event
when it's going to pullup or pulldown data line.

Signed-off-by: Xu Yang <[email protected]>
Acked-by: Peter Chen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Xu Yang

drivers/usb/chipidea/udc.c

@@ -1970,6 +1970,11 @@ static int ci_udc_pullup(struct usb_gadget *_gadget, int is_on)
 		hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
 	else
 		hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+
+	if (ci->platdata->notify_event) {
+		_gadget->connected = is_on;
+		ci->platdata->notify_event(ci, CI_HDRC_CONTROLLER_PULLUP_EVENT);
+	}
 	pm_runtime_put_sync(ci->dev);
 
 	return 0;

include/linux/usb/chipidea.h

@@ -72,6 +72,7 @@ struct ci_hdrc_platform_data {
 #define CI_HDRC_IMX_HSIC_ACTIVE_EVENT		2
 #define CI_HDRC_IMX_HSIC_SUSPEND_EVENT		3
 #define CI_HDRC_CONTROLLER_VBUS_EVENT		4
+#define CI_HDRC_CONTROLLER_PULLUP_EVENT		5
 	int	(*notify_event) (struct ci_hdrc *ci, unsigned event);
 	struct regulator	*reg_vbus;
 	struct usb_otg_caps	ci_otg_caps;