> [...] To put it
> differently, the power handling is completely bypassing the driver.
> Currently this works because for most (if not all) devices, tuner_power does
> not actually control the tuner power but the tuner chip enable or something
> similar. A corollary is that tuner_power does not reset the device and the
> registers.

At least on MPIOs this is not true since GPIO toggled in tuner_power()
drives some MOS which cuts power supply to the TEA chip. Moreover all
fm chips I saw enter low power standby mode when enable line is
deasserted so it CAN be seen as power related (although will preserve
registers values).

Marcin
Received on 2012-02-02