staging: vc04_services: fix up rpi firmware functions

The raspberrypi-firmware.h file should provide empty functions if we
aren't building in that option.  This makes it easier to test-build
code, and not have odd warnings about unused variables if you just try
to #define away the functions.

Cc: Daniel Stone <daniels@collabora.com>
Cc: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Pranith Kumar <bobby.prani@gmail.com>
Cc: popcornmix <popcornmix@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index a06baffdf580..cb979ad90401 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -115,10 +115,29 @@ enum rpi_firmware_property_tag {
         RPI_FIRMWARE_GET_DMA_CHANNELS =                       0x00060001,
 };
 
+#if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
 int rpi_firmware_property(struct rpi_firmware *fw,
                           u32 tag, void *data, size_t len);
 int rpi_firmware_property_list(struct rpi_firmware *fw,
                                void *data, size_t tag_size);
 struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
+#else
+static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
+                                        void *data, size_t len)
+{
+        return 0;
+}
+
+static inline int rpi_firmware_property_list(struct rpi_firmware *fw,
+                                             void *data, size_t tag_size)
+{
+        return 0;
+}
+
+static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
+{
+        return NULL;
+}
+#endif
 
 #endif /* __SOC_RASPBERRY_FIRMWARE_H__ */