Leaving microphone bias off is a valid setting and even used in the DT
binding document example. Add this setting here and document the same.
Signed-off-by: Andrew F. Davis <afd@xxxxxx>
---
Documentation/devicetree/bindings/sound/tlv320aic31xx.txt | 1 +
include/dt-bindings/sound/tlv320aic31xx-micbias.h | 1 +
sound/soc/codecs/tlv320aic31xx.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt b/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
index 4c4e77f97d87..a56b40a1726c 100644
--- a/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
+++ b/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
@@ -24,6 +24,7 @@ Optional properties:
- reset-gpio - GPIO specification for the active low RESET input.
- ai31xx-micbias-vg - MicBias Voltage setting
+ 0 or MICBIAS_OFF - MICBIAS output is powered off
1 or MICBIAS_2_0V - MICBIAS output is powered to 2.0V
2 or MICBIAS_2_5V - MICBIAS output is powered to 2.5V
3 or MICBIAS_AVDD - MICBIAS output is connected to AVDD
diff --git a/include/dt-bindings/sound/tlv320aic31xx-micbias.h b/include/dt-bindings/sound/tlv320aic31xx-micbias.h
index c6895a18a455..069484070fcf 100644
--- a/include/dt-bindings/sound/tlv320aic31xx-micbias.h
+++ b/include/dt-bindings/sound/tlv320aic31xx-micbias.h
@@ -2,6 +2,7 @@
#ifndef __DT_TLV320AIC31XX_MICBIAS_H
#define __DT_TLV320AIC31XX_MICBIAS_H
+#define MICBIAS_OFF 0
#define MICBIAS_2_0V 1
#define MICBIAS_2_5V 2
#define MICBIAS_AVDDV 3
diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index 44502a847af4..e8eb3de7af7b 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1313,6 +1313,7 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c,
fwnode_property_read_u32(aic31xx->dev->fwnode, "ai31xx-micbias-vg",
&micbias_value);
switch (micbias_value) {
+ case MICBIAS_OFF:
case MICBIAS_2_0V:
case MICBIAS_2_5V:
case MICBIAS_AVDDV:
--
2.15.0
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