[linux-dvb] alps_tdlb7 with SP5668 PLL

[skrodzki_list@stevekist.de (Stephan Skrodzki)]

Hi there,

I have a FF TT DVB-T 1.2 which is unfortunately not equipped with a SP5659 PLL 
but which has a SP5668 PLL inside. No driver for that is existing yet.

This PLL is not controlled via the I2C on the SP8870 but it has a dedicated 3 
wire serial interface. First measurements gave me the idea, that it seems to 
be controlled by the AV7110, as the wires on the PCB end somewhere under the 
AV7110. I think the could be tied to some of the GPIO pins on the AV7110.

My idea is first to modify the av7110 driver so, that I can use some ioctls to 
trigger every single GPIO. With that action I could find out, which are the 
connected GPIOs. Then I think it would not be too hard to modifiy the tuner 
code to use the SP5668.

My first browsing through the driver gave me no idea, how to switch GPIOs on 
the AV7110 (not! the SAA). So my question is:

How do I control the av7110's GPIOs?

Any hints would be wellcome, also any ideas if my idea to go is right or if 
there are easier ways...

Regards
 Steve