extcon: arizona: Simplify HPDET based identification

Rather than measuring both HP channels we can simply directly measure the
microphone impedance and then rely on MICDET for final confirmation of the
presence of a suitable microphone. This improves the overall performance
of the identification process.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.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 008b8c40549f..45c84777c624 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -128,6 +128,9 @@ struct arizona_pdata {
         /** Use the headphone detect circuit to identify the accessory */
         bool hpdet_acc_id;
 
+        /** Check for line output with HPDET method */
+        bool hpdet_acc_id_line;
+
         /** GPIO used for mic isolation with HPDET */
         int hpdet_id_gpio;