V4L/DVB: Add SPI support to V4L2

Add support SPI bus to v4l2. Useful for control some device with SPI bus like
hardware MPEG2 encoders and etc.

Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
index 0d06e7cbd5b3..5a7dc4afe92a 100644
--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -21,6 +21,9 @@
 #include <linux/types.h>
 #include <linux/ioctl.h>
 #include <linux/i2c.h>
+#if defined(CONFIG_SPI)
+#include <linux/spi/spi.h>
+#endif
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 
@@ -97,6 +100,14 @@ void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
                                 i2c_unregister_device(client);
                 }
 #endif
+#if defined(CONFIG_SPI)
+                if (sd->flags & V4L2_SUBDEV_FL_IS_SPI) {
+                        struct spi_device *spi = v4l2_get_subdevdata(sd);
+
+                        if (spi)
+                                spi_unregister_device(spi);
+                }
+#endif
         }
 }
 EXPORT_SYMBOL_GPL(v4l2_device_unregister);