Commit bb13f0e0 authored by Fang, Yang A's avatar Fang, Yang A Committed by Mark Brown
Browse files

ASoC: max98090: read micbias from device property 



This patch reads max98090 micbias from acpi or dt

Signed-off-by: default avatarFang, Yang A <yang.a.fang@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b787f68c

Documentation/devicetree/bindings/sound/max98090.txt

+6 −0
Original line number Diff line number Diff line
@@ -18,6 +18,12 @@ Optional properties: 


- maxim,dmic-freq: Frequency at which to clock DMIC



- maxim,micbias: Micbias voltage applies to the analog mic, valid voltages value are:

	0 - 2.2v

	1 - 2.55v

	2 - 2.4v

	3 - 2.8v



Pins on the device (for linking into audio routes):



  * MIC1

sound/soc/codecs/max98090.c

+12 −1
Original line number Diff line number Diff line
@@ -2422,6 +2422,8 @@ 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");
@@ -2506,8 +2508,17 @@ 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_2V8;

		dev_info(codec->dev, "use default 2.8v micbias\n");

	} else if (micbias < M98090_MBVSEL_2V2 || micbias > M98090_MBVSEL_2V8) {

		dev_err(codec->dev, "micbias out of range 0x%x\n", micbias);

		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);