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

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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.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Guennadi Liakhovetski 2013-08-28 10:28:27 -03:00 committed by Mauro Carvalho Chehab
parent cf326dfebe
commit 774cc4c289
1 changed files with 3 additions and 0 deletions
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include/media/v4l2-clk.h
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@ -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); 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 #endif