greybus: uart: Create separate module

Create separate module for uart gpbridge driver.

Tested on EVT 1.5 by inserting GP test module, all the devices were
enumerated correctly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/Makefile

@@ -15,7 +15,6 @@ greybus-y :=	core.o		\
 		legacy.o
 
 gb-phy-y :=	gpbridge.o	\
-		uart.o	\
 		usb.o
 
 # Prefix all modules with gb-
@@ -37,6 +36,7 @@ gb-camera-y := camera.o
 gb-firmware-y := fw-core.o fw-download.o
 gb-spi-y := spi.o
 gb-sdio-y := sdio.o
+gb-uart-y := uart.o
 gb-pwm-y := pwm.o
 gb-gpio-y := gpio.o
 gb-i2c-y := i2c.o
@@ -64,6 +64,7 @@ obj-m += gb-audio-manager.o
 obj-m += gb-firmware.o
 obj-m += gb-spi.o
 obj-m += gb-sdio.o
+obj-m += gb-uart.o
 obj-m += gb-pwm.o
 obj-m += gb-gpio.o
 obj-m += gb-i2c.o

drivers/staging/greybus/gpbridge.c

@@ -317,10 +317,6 @@ static int __init gpbridge_init(void)
 		goto error_gpbridge;
 	}
 
-	if (gb_uart_driver_init()) {
-		pr_err("error initializing uart driver\n");
-		goto error_uart;
-	}
 	if (gb_usb_driver_init()) {
 		pr_err("error initializing usb driver\n");
 		goto error_usb;
@@ -329,8 +325,6 @@ static int __init gpbridge_init(void)
 	return 0;
 
 error_usb:
-	gb_uart_driver_exit();
-error_uart:
 	greybus_deregister(&gb_gpbridge_driver);
 error_gpbridge:
 	bus_unregister(&gpbridge_bus_type);
@@ -342,7 +336,6 @@ module_init(gpbridge_init);
 static void __exit gpbridge_exit(void)
 {
 	gb_usb_driver_exit();
-	gb_uart_driver_exit();
 
 	greybus_deregister(&gb_gpbridge_driver);
 	bus_unregister(&gpbridge_bus_type);

drivers/staging/greybus/gpbridge.h

@@ -66,9 +66,6 @@ void gb_##__driver##_exit(void)				\
 	gb_gpbridge_deregister(&__driver);			\
 }
 
-extern int gb_uart_driver_init(void);
-extern void gb_uart_driver_exit(void);
-
 extern int gb_usb_driver_init(void);
 extern void gb_usb_driver_exit(void);
 

drivers/staging/greybus/uart.c

@@ -804,6 +804,7 @@ static const struct gpbridge_device_id gb_uart_id_table[] = {
 	{ GPBRIDGE_PROTOCOL(GREYBUS_PROTOCOL_UART) },
 	{ },
 };
+MODULE_DEVICE_TABLE(gpbridge, gb_uart_id_table);
 
 static struct gpbridge_driver uart_driver = {
 	.name		= "uart",
@@ -812,7 +813,7 @@ static struct gpbridge_driver uart_driver = {
 	.id_table	= gb_uart_id_table,
 };
 
-int gb_uart_driver_init(void)
+static int gb_uart_driver_init(void)
 {
 	int ret;
 
@@ -828,9 +829,13 @@ int gb_uart_driver_init(void)
 
 	return 0;
 }
+module_init(gb_uart_driver_init);
 
-void gb_uart_driver_exit(void)
+static void gb_uart_driver_exit(void)
 {
 	gb_gpbridge_deregister(&uart_driver);
 	gb_tty_exit();
 }
+
+module_exit(gb_uart_driver_exit);
+MODULE_LICENSE("GPL v2");