Re: [ANN] Meeting minutes of the Cambourne meeting

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Guennadi,

On Tuesday 30 August 2011 00:20:09 Guennadi Liakhovetski wrote:
> On Mon, 29 Aug 2011, Laurent Pinchart wrote:
> 
> [snip]
> 
> > My idea was to let the kernel register all devices based on the DT or
> > board code. When the V4L2 host/bridge driver gets registered, it will
> > then call a V4L2 core function with a list of subdevs it needs. The V4L2
> > core would store that information and react to bus notifier events to
> > notify the V4L2 host/bridge driver when all subdevs are present. At that
> > point the host/bridge driver will get hold of all the subdevs and call
> > (probably through the V4L2 core) their .registered operation. That's
> > where the subdevs will get access to their clock using clk_get().
> 
> Correct me, if I'm wrong, but this seems to be the case of sensor (and
> other i2c-client) drivers having to succeed their probe() methods without
> being able to actually access the hardware?

That's right. I'd love to find a better way :-) Note that this is already the 
case for many subdev drivers that probe the hardware in the .registered() 
operation instead of the probe() method.

-- 
Regards,

Laurent Pinchart