USB: nop-usb-xceiv: behave when linked as a module

[firefly-linux-kernel-4.4.55.git] / drivers / usb / otg / nop-usb-xceiv.c

diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
index c567168f89af54c63a1b1f386758088c99ec3de6..9ed5ea568679c3715eae4a03700d1ff8bd05e409 100644 (file)
--- a/drivers/usb/otg/nop-usb-xceiv.c
+++ b/drivers/usb/otg/nop-usb-xceiv.c
@@ -22,8 +22,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * Current status:
- *     this is to add "nop" transceiver for all those phy which is
- *     autonomous such as isp1504 etc.
+ *     This provides a "nop" transceiver for PHYs which are
+ *     autonomous such as isp1504, isp1707, etc.
  */
 
 #include <linux/module.h>
@@ -36,30 +36,25 @@ struct nop_usb_xceiv {
        struct device           *dev;
 };
 
-static u64 nop_xceiv_dmamask = DMA_BIT_MASK(32);
-
-static struct platform_device nop_xceiv_device = {
-       .name           = "nop_usb_xceiv",
-       .id             = -1,
-       .dev = {
-               .dma_mask               = &nop_xceiv_dmamask,
-               .coherent_dma_mask      = DMA_BIT_MASK(32),
-               .platform_data          = NULL,
-       },
-};
+static struct platform_device *pd;
 
 void usb_nop_xceiv_register(void)
 {
-       if (platform_device_register(&nop_xceiv_device) < 0) {
+       if (pd)
+               return;
+       pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
+       if (!pd) {
                printk(KERN_ERR "Unable to register usb nop transceiver\n");
                return;
        }
 }
+EXPORT_SYMBOL(usb_nop_xceiv_register);
 
 void usb_nop_xceiv_unregister(void)
 {
-       platform_device_unregister(&nop_xceiv_device);
+       platform_device_unregister(pd);
 }
+EXPORT_SYMBOL(usb_nop_xceiv_unregister);
 
 static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x)
 {