USB: gadget: atmel_usba: allow multi instance

drop static struct usba_udc the_udc
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Bo Shen <voice.shen@atmel.com>

drivers/usb/gadget/atmel_usba_udc.c

@@ -27,9 +27,6 @@
 
 #include "atmel_usba_udc.h"
 
-
-static struct usba_udc the_udc;
-
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
@@ -1013,16 +1010,13 @@ static void nop_release(struct device *dev)
 
 }
 
-static struct usba_udc the_udc = {
-	.gadget	= {
-		.ops		= &usba_udc_ops,
-		.ep_list	= LIST_HEAD_INIT(the_udc.gadget.ep_list),
-		.max_speed	= USB_SPEED_HIGH,
-		.name		= "atmel_usba_udc",
-		.dev	= {
-			.init_name	= "gadget",
-			.release	= nop_release,
-		},
+struct usb_gadget usba_gadget_template = {
+	.ops		= &usba_udc_ops,
+	.max_speed	= USB_SPEED_HIGH,
+	.name		= "atmel_usba_udc",
+	.dev	= {
+		.init_name	= "gadget",
+		.release	= nop_release,
 	},
 };
 
@@ -1839,10 +1833,17 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 	struct usba_platform_data *pdata = pdev->dev.platform_data;
 	struct resource *regs, *fifo;
 	struct clk *pclk, *hclk;
-	struct usba_udc *udc = &the_udc;
+	struct usba_udc *udc;
 	static struct usba_ep *usba_ep;
 	int irq, ret, i;
 
+	udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
+	if (!udc)
+		return -ENOMEM;
+
+	udc->gadget = usba_gadget_template;
+	INIT_LIST_HEAD(&udc->gadget.ep_list);
+
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
 	fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
 	if (!regs || !fifo || !pdata)
@@ -1897,8 +1898,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 		goto err_alloc_ep;
 
 	udc->usba_ep = usba_ep;
-
-	the_udc.gadget.ep0 = &usba_ep[0].ep;
+	udc->gadget.ep0 = &usba_ep[0].ep;
 
 	INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
 	usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
@@ -1907,7 +1907,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 	usba_ep[0].ep.ops = &usba_ep_ops;
 	usba_ep[0].ep.name = pdata->ep[0].name;
 	usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
-	usba_ep[0].udc = &the_udc;
+	usba_ep[0].udc = udc;
 	INIT_LIST_HEAD(&usba_ep[0].queue);
 	usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
 	usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
@@ -1924,7 +1924,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 		ep->ep.ops = &usba_ep_ops;
 		ep->ep.name = pdata->ep[i].name;
 		ep->ep.maxpacket = pdata->ep[i].fifo_size;
-		ep->udc = &the_udc;
+		ep->udc = udc;
 		INIT_LIST_HEAD(&ep->queue);
 		ep->fifo_size = pdata->ep[i].fifo_size;
 		ep->nr_banks = pdata->ep[i].nr_banks;