greybus: spi: Create separate module

Create separate module for spi 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

@@ -16,7 +16,6 @@ greybus-y :=	core.o		\
 
 gb-phy-y :=	gpbridge.o	\
 		uart.o	\
-		spi.o	\
 		usb.o
 
 # Prefix all modules with gb-
@@ -36,6 +35,7 @@ gb-audio-manager-y += audio_manager.o
 gb-audio-manager-y += audio_manager_module.o
 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-pwm-y := pwm.o
 gb-gpio-y := gpio.o
@@ -62,6 +62,7 @@ obj-m += gb-audio-gb.o
 obj-m += gb-audio-apbridgea.o
 obj-m += gb-audio-manager.o
 obj-m += gb-firmware.o
+obj-m += gb-spi.o
 obj-m += gb-sdio.o
 obj-m += gb-pwm.o
 obj-m += gb-gpio.o

drivers/staging/greybus/gpbridge.c

@@ -325,15 +325,9 @@ static int __init gpbridge_init(void)
 		pr_err("error initializing usb driver\n");
 		goto error_usb;
 	}
-	if (gb_spi_driver_init()) {
-		pr_err("error initializing spi driver\n");
-		goto error_spi;
-	}
 
 	return 0;
 
-error_spi:
-	gb_usb_driver_exit();
 error_usb:
 	gb_uart_driver_exit();
 error_uart:
@@ -347,7 +341,6 @@ module_init(gpbridge_init);
 
 static void __exit gpbridge_exit(void)
 {
-	gb_spi_driver_exit();
 	gb_usb_driver_exit();
 	gb_uart_driver_exit();
 

drivers/staging/greybus/gpbridge.h

@@ -72,9 +72,6 @@ extern void gb_uart_driver_exit(void);
 extern int gb_usb_driver_init(void);
 extern void gb_usb_driver_exit(void);
 
-extern int gb_spi_driver_init(void);
-extern void gb_spi_driver_exit(void);
-
 /**
  * module_gpbridge_driver() - Helper macro for registering a gpbridge driver
  * @__gpbridge_driver: gpbridge_driver structure

drivers/staging/greybus/spi.c

@@ -550,6 +550,7 @@ static const struct gpbridge_device_id gb_spi_id_table[] = {
 	{ GPBRIDGE_PROTOCOL(GREYBUS_PROTOCOL_SPI) },
 	{ },
 };
+MODULE_DEVICE_TABLE(gpbridge, gb_spi_id_table);
 
 static struct gpbridge_driver spi_driver = {
 	.name		= "spi",
@@ -557,4 +558,6 @@ static struct gpbridge_driver spi_driver = {
 	.remove		= gb_spi_remove,
 	.id_table	= gb_spi_id_table,
 };
-gb_gpbridge_builtin_driver(spi_driver);
+
+module_gpbridge_driver(spi_driver);
+MODULE_LICENSE("GPL v2");