From: "Fang, Yang A" yang.a.fang@intel.com
This patch reads max98090 micbias from acpi or dt
Signed-off-by: Fang, Yang A yang.a.fang@intel.com --- .../devicetree/bindings/sound/max98090.txt | 2 ++ sound/soc/codecs/max98090.c | 8 +++++++- 2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/sound/max98090.txt b/Documentation/devicetree/bindings/sound/max98090.txt index aa802a2..eecb710 100644 --- a/Documentation/devicetree/bindings/sound/max98090.txt +++ b/Documentation/devicetree/bindings/sound/max98090.txt @@ -18,6 +18,8 @@ Optional properties:
- maxim,dmic-freq: Frequency at which to clock DMIC
+- maxim,micbias: Micbias voltage applies to the analog mic + Pins on the device (for linking into audio routes):
* MIC1 diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index c230626..4b61db7 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -2419,6 +2419,8 @@ static int max98090_probe(struct snd_soc_codec *codec) struct max98090_cdata *cdata; enum max98090_type devtype; int ret = 0; + int err; + unsigned int micbias;
dev_dbg(codec->dev, "max98090_probe\n");
@@ -2503,8 +2505,12 @@ static int max98090_probe(struct snd_soc_codec *codec) snd_soc_write(codec, M98090_REG_BIAS_CONTROL, M98090_VCM_MODE_MASK);
+ err = device_property_read_u32(codec->dev, "maxim,micbias", &micbias); + if (err || micbias < M98090_MBVSEL_2V2 || micbias > M98090_MBVSEL_2V8) + micbias = M98090_MBVSEL_2V8; + snd_soc_update_bits(codec, M98090_REG_MIC_BIAS_VOLTAGE, - M98090_MBVSEL_MASK, M98090_MBVSEL_2V8); + M98090_MBVSEL_MASK, micbias);
max98090_add_widgets(codec);