tree 9dd5a408d0e5d2df0b8ff1c397cbc92cc86a2539
parent dd235eea4ed75b1599dd9a53bb618fe5befeb731
author Mark Brown <broonie@opensource.wolfsonmicro.com> 1357862154 +0900
committer Chanwoo Choi <cw00.choi@samsung.com> 1358232138 +0900

extcon: arizona: Support direct microphone measurement via HPDET

With some GPIO control it is possible to detect microphones in a wider
range of configurations by directly measuring the microphone impedance
when the HPDET method cannot distinguish between the behaviour of the
two grounds. Allow a GPIO to be provided in platform data and use it to
implement this behaviour.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>