usb: gadget: move source sink's config descriptor out of f_sourcesink

f_sourcesink should only include the bare function but it also includes
the config descriptor. This patch moves the config descriptor into
zero.c, the only user of this function.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/f_sourcesink.c

@@ -328,6 +328,14 @@ sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
 	source_sink_intf_alt0.bInterfaceNumber = id;
 	source_sink_intf_alt1.bInterfaceNumber = id;
 
+	/* allocate string ID(s) */
+	id = usb_string_id(cdev);
+	if (id < 0)
+		return id;
+	strings_sourcesink[0].id = id;
+	source_sink_intf_alt0.iInterface = id;
+	source_sink_intf_alt1.iInterface = id;
+
 	/* allocate bulk endpoints */
 	ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
 	if (!ss->in_ep) {
@@ -869,43 +877,3 @@ static int ss_config_setup(struct usb_configuration *c,
 		return -EOPNOTSUPP;
 	}
 }
-
-static struct usb_configuration sourcesink_driver = {
-	.label			= "source/sink",
-	.strings		= sourcesink_strings,
-	.setup			= ss_config_setup,
-	.bConfigurationValue	= 3,
-	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
-	/* .iConfiguration	= DYNAMIC */
-};
-
-/**
- * sourcesink_add - add a source/sink testing configuration to a device
- * @cdev: the device to support the configuration
- */
-int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume)
-{
-	int id;
-
-	/* allocate string ID(s) */
-	id = usb_string_id(cdev);
-	if (id < 0)
-		return id;
-	strings_sourcesink[0].id = id;
-
-	source_sink_intf_alt0.iInterface = id;
-	source_sink_intf_alt1.iInterface = id;
-	sourcesink_driver.iConfiguration = id;
-
-	/* support autoresume for remote wakeup testing */
-	if (autoresume)
-		sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
-
-	/* support OTG systems */
-	if (gadget_is_otg(cdev->gadget)) {
-		sourcesink_driver.descriptors = otg_desc;
-		sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
-	}
-
-	return usb_add_config(cdev, &sourcesink_driver, sourcesink_bind_config);
-}

drivers/usb/gadget/g_zero.h

@@ -20,7 +20,6 @@ void disable_endpoints(struct usb_composite_dev *cdev,
 		struct usb_ep *iso_in, struct usb_ep *iso_out);
 
 /* configuration-specific linkup */
-int sourcesink_add(struct usb_composite_dev *cdev, bool autoresume);
 int loopback_add(struct usb_composite_dev *cdev, bool autoresume);
 
 #endif /* __G_ZERO_H */

drivers/usb/gadget/zero.c

@@ -139,10 +139,13 @@ const struct usb_descriptor_header *otg_desc[] = {
 /* default serial number takes at least two packets */
 static char serial[] = "0123456789.0123456789.0123456789";
 
+#define USB_GZERO_SS_DESC	(USB_GADGET_FIRST_AVAIL_IDX + 0)
+
 static struct usb_string strings_dev[] = {
 	[USB_GADGET_MANUFACTURER_IDX].s = "",
 	[USB_GADGET_PRODUCT_IDX].s = longname,
 	[USB_GADGET_SERIAL_IDX].s = serial,
+	[USB_GZERO_SS_DESC].s	= "source and sink data",
 	{  }			/* end of list */
 };
 
@@ -251,6 +254,15 @@ static void zero_resume(struct usb_composite_dev *cdev)
 
 /*-------------------------------------------------------------------------*/
 
+static struct usb_configuration sourcesink_driver = {
+	.label                  = "source/sink",
+	.strings                = sourcesink_strings,
+	.setup                  = ss_config_setup,
+	.bConfigurationValue    = 3,
+	.bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+	/* .iConfiguration      = DYNAMIC */
+};
+
 static int __init zero_bind(struct usb_composite_dev *cdev)
 {
 	int			status;
@@ -268,14 +280,29 @@ static int __init zero_bind(struct usb_composite_dev *cdev)
 
 	setup_timer(&autoresume_timer, zero_autoresume, (unsigned long) cdev);
 
+	sourcesink_driver.iConfiguration = strings_dev[USB_GZERO_SS_DESC].id;
+	/* support autoresume for remote wakeup testing */
+	sourcesink_driver.bmAttributes &= ~USB_CONFIG_ATT_WAKEUP;
+	sourcesink_driver.descriptors = NULL;
+	if (autoresume)
+		sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+
+	/* support OTG systems */
+	if (gadget_is_otg(cdev->gadget)) {
+		sourcesink_driver.descriptors = otg_desc;
+		sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+	}
+
 	/* Register primary, then secondary configuration.  Note that
 	 * SH3 only allows one config...
 	 */
 	if (loopdefault) {
 		loopback_add(cdev, autoresume != 0);
-		sourcesink_add(cdev, autoresume != 0);
+		usb_add_config(cdev, &sourcesink_driver,
+				sourcesink_bind_config);
 	} else {
-		sourcesink_add(cdev, autoresume != 0);
+		usb_add_config(cdev, &sourcesink_driver,
+				sourcesink_bind_config);
 		loopback_add(cdev, autoresume != 0);
 	}