extcon: arizona: Support HPDET based accessory identification

The accessory detection functionality in Arizona devices is flexible and
supports several system designs in addition to the default one implemented
by the existing driver. One such design uses the HPDET feature to determine
what kind of accessory is present by comparing measurements taken with the
two headphone grounds available on the device, implement that if selected
by platform data.

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>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index 0fc26a480be3..7c0878778357 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -99,6 +99,9 @@ struct arizona_pdata {
         /** GPIO5 is used for jack detection */
         bool jd_gpio5;
 
+        /** Use the headphone detect circuit to identify the accessory */
+        bool hpdet_acc_id;
+
         /** GPIO for mic detection polarity */
         int micd_pol_gpio;