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Subject: Re: Radio power handling

Re: Radio power handling

From: Marcin Bukat <marcin.bukat_at_gmail.com>
Date: Thu, 2 Feb 2012 08:56:56 +0100

> [...] 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


Page was last modified "Jan 10 2012" The Rockbox Crew
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