[linux-dvb] Re: [PATCHES] Frontend kernel i2c conversion.

[Ralph Metzler <rjkm@metzlerbros.de>]

Kenneth Aafløy writes:
 > On Wednesday 21 July 2004 00:34, Ralph Metzler wrote:
 > [snip]
 > >  > > Alternative: get the i2c_adapter pointer via sub_device,
 > >  > > lock it, (in case of linuxtv driver, change i2c adapter name),
 > >  > > scan it for already present clients, init them,
 > >  >
 > >  > How the initialization is done?
 > >
 > > Via i2c client command calls. FE_REGISTER and FE_UNREGISTER call the
 > > dvb_(un)register_frontend functions.
 > 
 > Currently, most, if not all frontends does not do that. They rather register 
 > the frontend in i2c_attach_adapter.

Yes, sorry, it looks like this was done differently in the linuxtv
drivers.

 
 > >  > > somehow add a callback for sub_devices in attach_inform
 > >  > > for future attachments, do the same for detachments (if one
 > >  > > allows it at all), unlock i2c_adapter.
 > >  >
 > >  > We'll need both attach and detach I think.  "rmmod $frontend" should
 > >  > work, even if it is only for small driver development turnaround times.
 > >
 > > Yes, definitely better for debugging.
 > 
 > As long as the frontend is unused by a *real* user it should be unloadable, 
 > and that is also fixed in current CVS.


Is it currently also possible to unload the dvb_adapter (und thus
i2c_adapter) before the frontend? If FE_UNREGISTER is not 
really unregistering this would also lead to problems!?


Ralph