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ASoC: nau8825: Add pre-charge actions for input

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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: David Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20230523083303.98436-1-CTLIN0@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
David Lin 2023-05-23 16:33:04 +08:00 committed by Mark Brown
parent 1d4a84632b
commit f9d790c578
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 35 additions and 2 deletions
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30
sound/soc/codecs/nau8825.c
View File

@ -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 |

7
sound/soc/codecs/nau8825.h
View File

@ -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)