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 <g.liakhovet...@gmx.de>
V4L2 clocks use device ID matching, which in case of I2C devices involves
comparing a specially constructed from an I2C adapter number and a device
address
---
include/media/v4l2-clk.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/media/v4l2-clk.h b/include/media/v4l2-clk.h
index a354a9d..0b36cc1 100644
--- 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
--
1.7.2.5
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