[media] v4l2: blackfin: convert ppi driver to a module

Other drivers can make use of it.

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/blackfin/Kconfig

@@ -2,9 +2,13 @@ config VIDEO_BLACKFIN_CAPTURE
 	tristate "Blackfin Video Capture Driver"
 	depends on VIDEO_V4L2 && BLACKFIN && I2C
 	select VIDEOBUF2_DMA_CONTIG
+	select VIDEO_BLACKFIN_PPI
 	help
 	  V4L2 bridge driver for Blackfin video capture device.
 	  Choose PPI or EPPI as its interface.
 
 	  To compile this driver as a module, choose M here: the
-	  module will be called bfin_video_capture.
+	  module will be called bfin_capture.
+
+config VIDEO_BLACKFIN_PPI
+	tristate

drivers/media/platform/blackfin/Makefile

@@ -1,2 +1,2 @@
-bfin_video_capture-objs := bfin_capture.o ppi.o
-obj-$(CONFIG_VIDEO_BLACKFIN_CAPTURE) += bfin_video_capture.o
+obj-$(CONFIG_VIDEO_BLACKFIN_CAPTURE) += bfin_capture.o
+obj-$(CONFIG_VIDEO_BLACKFIN_PPI)     += ppi.o

drivers/media/platform/blackfin/ppi.c

@@ -17,6 +17,7 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <linux/module.h>
 #include <linux/slab.h>
 
 #include <asm/bfin_ppi.h>
@@ -263,9 +264,15 @@ struct ppi_if *ppi_create_instance(const struct ppi_info *info)
 	pr_info("ppi probe success\n");
 	return ppi;
 }
+EXPORT_SYMBOL(ppi_create_instance);
 
 void ppi_delete_instance(struct ppi_if *ppi)
 {
 	peripheral_free_list(ppi->info->pin_req);
 	kfree(ppi);
 }
+EXPORT_SYMBOL(ppi_delete_instance);
+
+MODULE_DESCRIPTION("Analog Devices PPI driver");
+MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
+MODULE_LICENSE("GPL v2");