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ASoC: max98090: read micbias from device property

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This patch reads max98090 micbias from acpi or dt

Signed-off-by: Fang, Yang A <yang.a.fang@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Fang, Yang A 2015-05-29 11:56:10 -07:00 committed by Mark Brown
parent b787f68c36
commit bb13f0e08d
2 changed files with 18 additions and 1 deletions
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6
Documentation/devicetree/bindings/sound/max98090.txt
View file

@ -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

13
sound/soc/codecs/max98090.c
View file

@ -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);