greybus: battery-gb: move the battery protocol out to a stand-alone module

This moves the battery class protocol to be a stand-alone kernel module.
Signed-off-by: NGreg Kroah-Hartman <greg@kroah.com>
Reviewed-by: NAlex Elder <elder@linaro.org>

drivers/staging/greybus/Makefile

@@ -12,12 +12,12 @@ greybus-y :=	core.o		\
 		pwm-gb.o	\
 		sdio-gb.o	\
 		uart-gb.o	\
-		battery-gb.o	\
 		usb-gb.o
 
 obj-m += greybus.o
 obj-m += i2c-gb.o
 obj-m += vibrator-gb.o
+obj-m += battery-gb.o
 obj-m += es1-ap-usb.o
 
 KERNELVER		?= $(shell uname -r)

drivers/staging/greybus/battery-gb.c

@@ -367,12 +367,6 @@ static struct gb_protocol battery_protocol = {
 	.request_recv		= NULL,	/* no incoming requests */
 };
 
-int gb_battery_protocol_init(void)
-{
-	return gb_protocol_register(&battery_protocol);
-}
+gb_protocol_driver(&battery_protocol);
 
-void gb_battery_protocol_exit(void)
-{
-	gb_protocol_deregister(&battery_protocol);
-}
+MODULE_LICENSE("GPL v2");

drivers/staging/greybus/protocol.c

@@ -183,10 +183,6 @@ bool gb_protocol_init(void)
 {
 	bool ret = true;
 
-	if (gb_battery_protocol_init()) {
-		pr_err("error initializing battery protocol\n");
-		ret = false;
-	}
 	if (gb_gpio_protocol_init()) {
 		pr_err("error initializing gpio protocol\n");
 		ret = false;
@@ -216,5 +212,4 @@ void gb_protocol_exit(void)
 	gb_sdio_protocol_exit();
 	gb_uart_protocol_exit();
 	gb_gpio_protocol_exit();
-	gb_battery_protocol_exit();
 }

drivers/staging/greybus/protocol.h

@@ -51,9 +51,6 @@ void gb_protocol_put(struct gb_protocol *protocol);
  * Declared here for now.  They could be added via modules, or maybe
  * just use initcalls (which level?).
  */
-extern int gb_battery_protocol_init(void);
-extern void gb_battery_protocol_exit(void);
-
 extern int gb_gpio_protocol_init(void);
 extern void gb_gpio_protocol_exit(void);