[media] V4L2: add a v4l2-clk helper macro to produce an I2C device ID

To obtain a clock reference consumers supply their device object to the V4L2 clock framework. The latter then uses the consumer device name to find a matching clock. For that to work V4L2 clock providers have to provide the same device name, when registering clocks. This patch adds a helper macro to generate a suitable device name for I2C devices. Signed-off-by: Guennadi Liakhovetski <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
ambv · Oct 31, 2013 · 774cc4c · 774cc4c
1 parent cf326df
commit 774cc4c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/include/media/v4l2-clk.h b/include/media/v4l2-clk.h
@@ -65,4 +65,7 @@ static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
 	return __v4l2_clk_register_fixed(dev_id, id, rate, THIS_MODULE);
 }
 
+#define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \
+			  "%d-%04x", adap, client)
+
 #endif