[PATCH v2 1/3] usb: chipidea: udc: add a helper ci_udc_enable_vbus_irq()

[Xu Yang]

The VBUS interrupt is configured in multiple places, add a helper function
ci_udc_enable_vbus_irq() to simplify the code.

Acked-by: Peter Chen <peter.chen@xxxxxxxxxx>
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>

---
Changes in v2:
 - add R-b and A-b tag
---
 drivers/usb/chipidea/udc.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index f2de86d0ce40..d4277d6611ee 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1835,6 +1835,20 @@ static const struct usb_ep_ops usb_ep_ops = {
  * GADGET block
  *****************************************************************************/
 
+static void ci_udc_enable_vbus_irq(struct ci_hdrc *ci, bool enable)
+{
+	u32 reg = OTGSC_BSVIS;
+
+	if (!ci->is_otg)
+		return;
+
+	if (enable)
+		reg |= OTGSC_BSVIE;
+
+	/* Clear pending BSVIS and enable/disable BSVIE */
+	hw_write_otgsc(ci, OTGSC_BSVIE | OTGSC_BSVIS, reg);
+}
+
 static int ci_udc_get_frame(struct usb_gadget *_gadget)
 {
 	struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
@@ -2352,23 +2366,13 @@ static int udc_id_switch_for_device(struct ci_hdrc *ci)
 		pinctrl_select_state(ci->platdata->pctl,
 				     ci->platdata->pins_device);
 
-	if (ci->is_otg)
-		/* Clear and enable BSV irq */
-		hw_write_otgsc(ci, OTGSC_BSVIS | OTGSC_BSVIE,
-					OTGSC_BSVIS | OTGSC_BSVIE);
-
+	ci_udc_enable_vbus_irq(ci, true);
 	return 0;
 }
 
 static void udc_id_switch_for_host(struct ci_hdrc *ci)
 {
-	/*
-	 * host doesn't care B_SESSION_VALID event
-	 * so clear and disable BSV irq
-	 */
-	if (ci->is_otg)
-		hw_write_otgsc(ci, OTGSC_BSVIE | OTGSC_BSVIS, OTGSC_BSVIS);
-
+	ci_udc_enable_vbus_irq(ci, false);
 	ci->vbus_active = 0;
 
 	if (ci->platdata->pins_device && ci->platdata->pins_default)
@@ -2395,9 +2399,7 @@ static void udc_suspend(struct ci_hdrc *ci)
 static void udc_resume(struct ci_hdrc *ci, bool power_lost)
 {
 	if (power_lost) {
-		if (ci->is_otg)
-			hw_write_otgsc(ci, OTGSC_BSVIS | OTGSC_BSVIE,
-					OTGSC_BSVIS | OTGSC_BSVIE);
+		ci_udc_enable_vbus_irq(ci, true);
 		if (ci->vbus_active)
 			usb_gadget_vbus_disconnect(&ci->gadget);
 	} else if (ci->vbus_active && ci->driver &&
-- 
2.34.1