Re: [PATCH 2/3] V4L2: add a v4l2-clk helper macro to produce an I2C device ID

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 28 Aug 2013, Laurent Pinchart wrote:

> Hi Guennadi,
> 
> Thank you for the patch.
> 
> On Wednesday 28 August 2013 15:28:27 Guennadi Liakhovetski wrote:
> > 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@xxxxxx>
> > 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
> 
> Is this text placed below the SoB on purpose ?

Errm, it should have been deleted :) sorry.

Thanks
Guennadi

> 
> > ---
> >  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)
> > +
> 
> I would have made this a static inline but I have to confess I don't know why 
> :-)
> 
> >  #endif
> -- 
> Regards,
> 
> Laurent Pinchart
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux