greybus: i2c : Create separate module

Create separate module for i2c 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

@@ -18,7 +18,6 @@ gb-phy-y :=	gpbridge.o	\
 		sdio.o	\
 		uart.o	\
 		pwm.o	\
-		i2c.o	\
 		spi.o	\
 		usb.o
 
@@ -40,6 +39,7 @@ gb-audio-manager-y += audio_manager_module.o
 gb-camera-y := camera.o
 gb-firmware-y := fw-core.o fw-download.o
 gb-gpio-y := gpio.o
+gb-i2c-y := i2c.o
 
 obj-m += greybus.o
 obj-m += gb-phy.o
@@ -63,6 +63,7 @@ obj-m += gb-audio-apbridgea.o
 obj-m += gb-audio-manager.o
 obj-m += gb-firmware.o
 obj-m += gb-gpio.o
+obj-m += gb-i2c.o
 
 KERNELVER		?= $(shell uname -r)
 KERNELDIR 		?= /lib/modules/$(KERNELVER)/build

drivers/staging/greybus/gpbridge.c

@@ -333,10 +333,6 @@ static int __init gpbridge_init(void)
 		pr_err("error initializing usb driver\n");
 		goto error_usb;
 	}
-	if (gb_i2c_driver_init()) {
-		pr_err("error initializing i2c driver\n");
-		goto error_i2c;
-	}
 	if (gb_spi_driver_init()) {
 		pr_err("error initializing spi driver\n");
 		goto error_spi;
@@ -345,8 +341,6 @@ static int __init gpbridge_init(void)
 	return 0;
 
 error_spi:
-	gb_i2c_driver_exit();
-error_i2c:
 	gb_usb_driver_exit();
 error_usb:
 	gb_sdio_driver_exit();
@@ -366,7 +360,6 @@ module_init(gpbridge_init);
 static void __exit gpbridge_exit(void)
 {
 	gb_spi_driver_exit();
-	gb_i2c_driver_exit();
 	gb_usb_driver_exit();
 	gb_sdio_driver_exit();
 	gb_uart_driver_exit();

drivers/staging/greybus/gpbridge.h

@@ -78,9 +78,6 @@ extern void gb_sdio_driver_exit(void);
 extern int gb_usb_driver_init(void);
 extern void gb_usb_driver_exit(void);
 
-extern int gb_i2c_driver_init(void);
-extern void gb_i2c_driver_exit(void);
-
 extern int gb_spi_driver_init(void);
 extern void gb_spi_driver_exit(void);
 

drivers/staging/greybus/i2c.c

@@ -321,6 +321,7 @@ static const struct gpbridge_device_id gb_i2c_id_table[] = {
 	{ GPBRIDGE_PROTOCOL(GREYBUS_PROTOCOL_I2C) },
 	{ },
 };
+MODULE_DEVICE_TABLE(gpbridge, gb_i2c_id_table);
 
 static struct gpbridge_driver i2c_driver = {
 	.name		= "i2c",
@@ -328,4 +329,6 @@ static struct gpbridge_driver i2c_driver = {
 	.remove		= gb_i2c_remove,
 	.id_table	= gb_i2c_id_table,
 };
-gb_gpbridge_builtin_driver(i2c_driver);
+
+module_gpbridge_driver(i2c_driver);
+MODULE_LICENSE("GPL v2");