GPIO interface between DVB sub-drivers (bridge, demod, tuner)

[Antti Palosaari <crope@iki.fi>]

I am looking kinda standardized interface for setting GPIOs between the 
DVB drivers chip drivers. For most typical example there is LNA which is 
controlled by RF-tuner GPIO. That kind of LNA controlling logic belongs 
to interface driver thus I will need to call demod driver from bridge in 
order to set LNA.

Simply solution is to add own own callbacks, set_gpio() and get_gpio() 
for both tuner and demod ops but I will not like to that of there is 
existing solutions. Grepping Documentation reveals quite much documents, 
most interesting seems to be:
Documentation/gpio.txt
Documentation/devicetree/bindings/gpio/gpio.txt
Documentation/pinctrl.txt

Is there anyone who could say straight now what is best approach and 
where to look example?


regards
Antti

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