linux-kernel - [RFC 13/19] dwc3: gadget: register gadget in OTG core

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Date:	Wed, 18 Mar 2015 15:04:18 +0100
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	balbi@...com
Cc:	gregkh@...uxfoundation.org, myungjoo.ham@...sung.com,
	cw00.choi@...sung.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, m.szyprowski@...sung.com,
	Robert Baldyga <r.baldyga@...sung.com>
Subject: [RFC 13/19] dwc3: gadget: register gadget in OTG core

Gadget driver needs to be registered in OTG to perform dynamic
role switching.

Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
 drivers/usb/dwc3/gadget.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index b0c1ab5..c5a7cf1 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -32,6 +32,7 @@
 
 #include "debug.h"
 #include "core.h"
+#include "otg.h"
 #include "gadget.h"
 #include "io.h"
 
@@ -2783,8 +2784,18 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 		goto err4;
 	}
 
+	if (dwc->dotg) {
+		ret = otg_set_peripheral(&dwc->dotg->otg, &dwc->gadget);
+		if (ret) {
+			dev_err(dwc->dev, "failed to set otg peripheral\n");
+			goto err5;
+		}
+	}
+
 	return 0;
 
+err5:
+	usb_del_gadget_udc(&dwc->gadget);
 err4:
 	dwc3_gadget_free_endpoints(dwc);
 	dma_free_coherent(dwc->dev, DWC3_EP0_BOUNCE_SIZE,
@@ -2809,6 +2820,9 @@ err0:
 
 void dwc3_gadget_exit(struct dwc3 *dwc)
 {
+	if (dwc->dotg)
+		otg_set_peripheral(&dwc->dotg->otg, NULL);
+
 	usb_del_gadget_udc(&dwc->gadget);
 
 	dwc3_gadget_free_endpoints(dwc);
-- 
1.9.1

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