ASoC: Implement interrupt based jack detection

Allow microphone detection on WM8962 to be performed using the interrupt
signal, allowing the detection of both microphone presence and button
presses with a signal singal from the CODEC to CPU.  Currently a 250ms
debounce time is applied to both short circuit and presence detection,
this has not been optimised.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8962.h b/sound/soc/codecs/wm8962.h
index fce11998b278..2af6c9371fcc 100644
--- a/sound/soc/codecs/wm8962.h
+++ b/sound/soc/codecs/wm8962.h
@@ -14,6 +14,7 @@
 #define _WM8962_H
 
 #include <asm/types.h>
+#include <sound/soc.h>
 
 #define WM8962_SYSCLK_MCLK 1
 #define WM8962_SYSCLK_FLL  2
@@ -3785,4 +3786,6 @@ struct wm8962_reg_access {
 extern
 const struct wm8962_reg_access wm8962_reg_access[WM8962_MAX_REGISTER + 1];
 
+int wm8962_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack);
+
 #endif