ASoC: wcd9310: Add support for MIC BIAS other than 1.8 volts
When MBHC is set to use microphone bias other than 1.8 volts, codec driver
needs to calculate two sets of thresholds. This is required because the
mic bias can be powered from two different sources. If vddio is used as
supply, then the maximum microphone bias voltage can only be 1.8 volts.
If MBHC originally was using other microphone voltage, the thresholds will
have to be changed when mic bias power is switched to vddio supply.
CRs-fixed: 341458
Change-Id: I428a4adaaa78b273cd598772c38bccdce8d9c27c
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
diff --git a/sound/soc/codecs/wcd9310.h b/sound/soc/codecs/wcd9310.h
index 6e80284..38ec27c 100644
--- a/sound/soc/codecs/wcd9310.h
+++ b/sound/soc/codecs/wcd9310.h
@@ -24,6 +24,7 @@
#define DEFAULT_DCE_STA_WAIT 55
#define DEFAULT_DCE_WAIT 60000
#define DEFAULT_STA_WAIT 5000
+#define VDDIO_MICBIAS_MV 1800
#define STA 0
#define DCE 1