[linux-dvb] 2.6 request_firmware and frontends

[Ralph Metzler <rjkm@metzlerbros.de>]

Andrew de Quincey writes:
 > I just spent a while trying to figure out how I would go about using the 2.6 
 > request_firmware() calls for the tda1004x driver. As far as I can see, its 
 > impossible right now.
 > 
 > The problem is you have to pass a struct device* into request_firmware() to 
 > tell the kernel which device you are. Frontend drivers have no idea of which 
 > physical device they are attached to.
 > 
 > As far as I can see, the only way to do it would be to modify the struct 
 > dvb_adapter to either contain the struct device*, or to add a callback 
 > function to load the firmware to it.
 > 
 > My favoured solution is the struct device* one... that would mean frontends 
 > could also determine the PCI/USB device IDs of the device they're attached 
 > to... say two different manufacturers use the same frontend chip, but it 
 > needs to be configured differently for their devices, this could be handled 
 > easily.

I am doing it using the normal kernel I2C driver.
Every I2C frontend automatically calls the I2C driver attach callback
where the card driver can configure it accordingly.
The frontend driver does not really need to know anything about higher
level structures.

Ralph 



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