v4l2-pci-skeleton: Only build if PCI is available

Currently arm64 does not support PCI but it does support v4l2. Since the
PCI skeleton driver is built unconditionally as a module with no dependency
on PCI this causes build failures for arm64 allmodconfig. Fix this by
defining a symbol VIDEO_PCI_SKELETON for the skeleton and conditionalising
the build on that.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org> [added VIDEO dependencies]
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

2 files changed, 10 insertions, 1 deletions

diff --git a/Documentation/video4linux/Makefile b/Documentation/video4linux/Makefile
index d58101e788fc..65a351d75c95 100644
--- a/Documentation/video4linux/Makefile
+++ b/Documentation/video4linux/Makefile
@@ -1 +1 @@
-obj-m := v4l2-pci-skeleton.o
+obj-$(CONFIG_VIDEO_PCI_SKELETON) := v4l2-pci-skeleton.o
diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
index 9ca0f8d59a14..ba7e21a73023 100644
--- a/drivers/media/v4l2-core/Kconfig
+++ b/drivers/media/v4l2-core/Kconfig
@@ -25,6 +25,15 @@ config VIDEO_FIXED_MINOR_RANGES
 
           When in doubt, say N.
 
+config VIDEO_PCI_SKELETON
+        tristate "Skeleton PCI V4L2 driver"
+        depends on PCI && BUILD_DOCSRC
+        depends on VIDEO_V4L2 && VIDEOBUF2_CORE
+        depends on VIDEOBUF2_MEMOPS && VIDEOBUF2_DMA_CONTIG
+        ---help---
+          Enable build of the skeleton PCI driver, used as a reference
+          when developing new drivers.
+
 # Used by drivers that need tuner.ko
 config VIDEO_TUNER
         tristate