Unverified Commit f9d790c5 authored by David Lin's avatar David Lin Committed by Mark Brown
Browse files

ASoC: nau8825: Add pre-charge actions for input 



Adding pre-charge actions to make FEPGA power stable faster. It
improve the recording quality at the beginning. Thus, it is also
meaningfully to decrease the final adc delay time.

Signed-off-by: default avatarDavid Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20230523083303.98436-1-CTLIN0@nuvoton.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 1d4a8463

sound/soc/codecs/nau8825.c

+28 −2
Original line number Diff line number Diff line
@@ -911,6 +911,32 @@ static bool nau8825_volatile_reg(struct device *dev, unsigned int reg) 
	}

}



static int nau8825_fepga_event(struct snd_soc_dapm_widget *w,

			       struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);

	struct nau8825 *nau8825 = snd_soc_component_get_drvdata(component);



	switch (event) {

	case SND_SOC_DAPM_POST_PMU:

		regmap_update_bits(nau8825->regmap, NAU8825_REG_FEPGA,

				   NAU8825_ACDC_CTRL_MASK,

				   NAU8825_ACDC_VREF_MICP | NAU8825_ACDC_VREF_MICN);

		regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,

				   NAU8825_DISCHRG_EN, NAU8825_DISCHRG_EN);

		msleep(40);

		regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,

				   NAU8825_DISCHRG_EN, 0);

		regmap_update_bits(nau8825->regmap, NAU8825_REG_FEPGA,

				   NAU8825_ACDC_CTRL_MASK, 0);

		break;

	default:

		break;

	}



	return 0;

}



static int nau8825_adc_event(struct snd_soc_dapm_widget *w,

		struct snd_kcontrol *kcontrol, int event)

{
@@ -1127,8 +1153,8 @@ static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = { 
	SND_SOC_DAPM_INPUT("MIC"),

	SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),



	SND_SOC_DAPM_PGA("Frontend PGA", NAU8825_REG_POWER_UP_CONTROL, 14, 0,

		NULL, 0),

	SND_SOC_DAPM_PGA_E("Frontend PGA", NAU8825_REG_POWER_UP_CONTROL, 14, 0,

			   NULL, 0, nau8825_fepga_event, SND_SOC_DAPM_POST_PMU),



	SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0,

		nau8825_adc_event, SND_SOC_DAPM_POST_PMU |

sound/soc/codecs/nau8825.h

+7 −0
Original line number Diff line number Diff line
@@ -442,10 +442,17 @@ 
/* BOOST (0x76) */

#define NAU8825_PRECHARGE_DIS	(1 << 13)

#define NAU8825_GLOBAL_BIAS_EN	(1 << 12)

#define NAU8825_DISCHRG_EN	(1 << 11)

#define NAU8825_HP_BOOST_DIS		(1 << 9)

#define NAU8825_HP_BOOST_G_DIS	(1 << 8)

#define NAU8825_SHORT_SHUTDOWN_EN	(1 << 6)



/* FEPGA (0x77) */

#define NAU8825_ACDC_CTRL_SFT		14

#define NAU8825_ACDC_CTRL_MASK		(0x3 << NAU8825_ACDC_CTRL_SFT)

#define NAU8825_ACDC_VREF_MICP		(0x1 << NAU8825_ACDC_CTRL_SFT)

#define NAU8825_ACDC_VREF_MICN		(0x2 << NAU8825_ACDC_CTRL_SFT)



/* POWER_UP_CONTROL (0x7f) */

#define NAU8825_POWERUP_INTEGR_R	(1 << 5)

#define NAU8825_POWERUP_INTEGR_L	(1 << 4)