[linux-dvb] Re: Frontend-specific ioctl's

[Patrick Boettcher <patrick.boettcher@desy.de>]

On Wed, 29 Dec 2004, Johannes Stezenbach wrote:

> Patrick Boettcher wrote:
> > What would be the best way to implement a frontend-specific ioctl (or
> > another access possibility) for accessing special and specific demod-data
> > from user level? Maybe a dedicated /dev-node?
> What would that ioctl do?
Get some more values from the demod, which are currently not used, because 
linux dvb does not need it.

> You could add an ioctl func ptr to struct dvb_frontend_ops, and
> call it (when !NULL) from dvb_frontend_ioctl().
I don't want to change the dvb-api, because I want to include the 
interface in the mainstream-driver. That's what I would do when I would 
add another ioctl call to dvb_frontend_ops, wouldn't it?

> If you need it only for debugging frontends connected via i2c
> you could maybe just use i2c-dev. "cat /sys/class/i2c-dev/i2c-?/name"
> will tell you which is the right adapter.
Will have a look at it, maybe it is what I need.

Thanks,
Patrick.

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