ASoC: max98095: add jack detection

This change adds the logic to support using the jack detect mechanism built
in to the codec to detect both when a jack was inserted and what type of
jack is present.

This change also supports the use of an external mechanism for headphone
detection. If this mechanism exists, when the max98095_jack_detect function
is called, the hp_jack is simply passed NULL.

This change supports both simple headphones, powered headphones, microphones
and headsets with both headphones and a mic.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/sound/max98095.h b/include/sound/max98095.h
index 7513a42dd4aa..65b1c90f78ab 100644
--- a/include/sound/max98095.h
+++ b/include/sound/max98095.h
@@ -49,6 +49,18 @@ struct max98095_pdata {
          */
         unsigned int digmic_left_mode:1;
         unsigned int digmic_right_mode:1;
+
+        /* Pin5 is the mechanical method of sensing jack insertion
+         * but it is something that might not be supported.
+         * 0 = PIN5 not supported
+         * 1 = PIN5 supported
+         */
+        int jack_detect_pin5en:1;
+
+        /* Slew amount for jack detection. Calculated as 4 * (delay + 1).
+         * Default delay is 24 to get a time of 100ms.
+         */
+        unsigned int jack_detect_delay;
 };
 
 #endif