ASoC: sgtl5000: Fix setting mic bias resistor
According to the datasheet: CHIP_MIC_CTRL 0x002A BITS[9:8] BIAS_RESISTOR 0x0 = Powerd off 0x1 = 2.0 kohm 0x2 = 4.0 kohm 0x3 = 8.0 kohm To set mic bias resistor, we need to update bits[9:8] of SGTL5000_CHIP_MIC_CTRL register. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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1 changed files with 3 additions and 6 deletions
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@ -131,16 +131,13 @@ static int mic_bias_event(struct snd_soc_dapm_widget *w,
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case SND_SOC_DAPM_POST_PMU:
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/* change mic bias resistor to 4Kohm */
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snd_soc_update_bits(w->codec, SGTL5000_CHIP_MIC_CTRL,
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SGTL5000_BIAS_R_4k, SGTL5000_BIAS_R_4k);
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SGTL5000_BIAS_R_MASK,
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SGTL5000_BIAS_R_4k << SGTL5000_BIAS_R_SHIFT);
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break;
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case SND_SOC_DAPM_PRE_PMD:
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/*
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* SGTL5000_BIAS_R_8k as mask to clean the two bits
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* of mic bias and output impedance
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*/
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snd_soc_update_bits(w->codec, SGTL5000_CHIP_MIC_CTRL,
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SGTL5000_BIAS_R_8k, 0);
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SGTL5000_BIAS_R_MASK, 0);
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break;
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}
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return 0;
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