From: "Andrew F. Davis" <afd@ti.com>
To: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
linux-kernel@vger.kernel.org, "Andrew F . Davis" <afd@ti.com>
Subject: [PATCH] ASoC: tlv320aic31xx: Add MICBIAS off setting
Date: Fri, 31 Aug 2018 13:05:07 -0500 [thread overview]
Message-ID: <20180831180507.28867-1-afd@ti.com> (raw)
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.
Although it may not make much sense to enable a microphone here without
any bias, it is a valid setting that can be chosen by DT and may be
needed for some boards.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
---
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 5b3c33bb99e5..411cc46a2c58 100644
--- a/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
+++ b/Documentation/devicetree/bindings/sound/tlv320aic31xx.txt
@@ -24,6 +24,7 @@ Optional properties:
- reset-gpios - 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 bf92d36b8f8a..7d87df518fed 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -1421,6 +1421,7 @@ 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:
--
2.18.0
next reply other threads:[~2018-08-31 18:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-31 18:05 Andrew F. Davis [this message]
2018-09-03 11:26 ` [PATCH] ASoC: tlv320aic31xx: Add MICBIAS off setting Mark Brown
2018-09-04 13:55 ` Andrew F. Davis
2018-09-04 14:41 ` Mark Brown
2018-09-04 14:43 ` Andrew F. Davis
2018-09-04 14:55 ` Mark Brown
2018-09-04 15:10 ` Andrew F. Davis
2018-09-04 15:56 ` Mark Brown
2018-09-04 16:02 ` Andrew F. Davis
2018-09-04 16:21 ` Mark Brown
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