Re: question about v4l2_subdev

[Sedji Gaouaou <sedji.gaouaou@atmel.com>]

Hi,


>
> 1. Something first should call v4l2_device_register() on a v4l2_device
> object.  (Typically there is only one v4l2_device object per "bridge"
> chip between the PCI, PCIe, or USB bus and the subdevices, even if that
> bridge chip has more than one I2C master implementation.)
>
> 2. Then, for subdevices connected to the bridge chip via I2C, something
> needs to call v4l2_i2c_new_subdev() with the v4l2_device pointer as one
> of the arguments, to get back a v4l2_subdevice instance pointer.
>
> 3. After that, v4l2_subdev_call() with the v4l2_subdev pointer as one of
> the arguments can be used to invoke the subdevice methods.
>
> TV Video capture drivers do this work themselves.  Drivers using a
> camera framework may have the framework doing some of the work for them.
>
>
> Regards,
> Andy
>
>
>


Is there a sensor driver which is using this method?

To write the ov2640 driver I have just copied the ov7670.c file, and I 
didn't find the v4l2_i2c_new_subdev in it...

Regards,
Sedji