greybus: vibrator-gb: move vibrator protocol to a stand-alone module.

We can't use the gb_protocol_driver() macro here as we need to do some
init and exit logic when loading and removing, so "open code" the module
init and exit functions.

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Reviewed-by: Alex Elder <elder@linaro.org>

drivers/staging/greybus/Makefile

@@ -13,11 +13,11 @@ greybus-y :=	core.o		\
 		sdio-gb.o	\
 		uart-gb.o	\
 		battery-gb.o	\
-		vibrator-gb.o	\
 		usb-gb.o
 
 obj-m += greybus.o
 obj-m += i2c-gb.o
+obj-m += vibrator-gb.o
 obj-m += es1-ap-usb.o
 
 KERNELVER		?= $(shell uname -r)

drivers/staging/greybus/protocol.c

@@ -203,10 +203,6 @@ bool gb_protocol_init(void)
 		pr_err("error initializing sdio protocol\n");
 		ret = false;
 	}
-	if (gb_vibrator_protocol_init()) {
-		pr_err("error initializing vibrator protocol\n");
-		ret = false;
-	}
 	if (gb_usb_protocol_init()) {
 		pr_err("error initializing usb protocol\n");
 		ret = false;
@@ -217,7 +213,6 @@ bool gb_protocol_init(void)
 void gb_protocol_exit(void)
 {
 	gb_usb_protocol_exit();
-	gb_vibrator_protocol_exit();
 	gb_sdio_protocol_exit();
 	gb_uart_protocol_exit();
 	gb_gpio_protocol_exit();

drivers/staging/greybus/protocol.h

@@ -66,9 +66,6 @@ extern void gb_uart_protocol_exit(void);
 extern int gb_sdio_protocol_init(void);
 extern void gb_sdio_protocol_exit(void);
 
-extern int gb_vibrator_protocol_init(void);
-extern void gb_vibrator_protocol_exit(void);
-
 extern int gb_usb_protocol_init(void);
 extern void gb_usb_protocol_exit(void);
 

drivers/staging/greybus/vibrator-gb.c

@@ -205,7 +205,7 @@ static struct gb_protocol vibrator_protocol = {
 	.request_recv		= NULL,	/* no incoming requests */
 };
 
-int gb_vibrator_protocol_init(void)
+static __init int protocol_init(void)
 {
 	int retval;
 
@@ -216,8 +216,13 @@ int gb_vibrator_protocol_init(void)
 	return gb_protocol_register(&vibrator_protocol);
 }
 
-void gb_vibrator_protocol_exit(void)
+static __exit void protocol_exit(void)
 {
 	gb_protocol_deregister(&vibrator_protocol);
 	class_unregister(&vibrator_class);
 }
+
+module_init(protocol_init);
+module_exit(protocol_exit);
+
+MODULE_LICENSE("GPL v2");