diff options
| author | John Hsu <KCHSU0@nuvoton.com> | 2017-11-07 15:23:18 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-11-07 11:28:48 +0100 |
| commit | 14323ff8c21825e20810e893312f9321f9e4e72c (patch) | |
| tree | e4376fb4a771e4f07717879d1dac5249797699d2 /sound/soc/codecs/nau8540.c | |
| parent | e4d0db60e8d25cc62b9b7e32c18e7f6acc136055 (diff) | |
ASoC: nau8540: PGA short to ground
Change channel PGA input mode selection for better recording quality.
The patch shorts the inputs to ground with 12kOhm differentially
terminated.
Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/nau8540.c')
| -rw-r--r-- | sound/soc/codecs/nau8540.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/soc/codecs/nau8540.c b/sound/soc/codecs/nau8540.c index c10cbffa6314..8246486a588d 100644 --- a/sound/soc/codecs/nau8540.c +++ b/sound/soc/codecs/nau8540.c @@ -730,6 +730,13 @@ static void nau8540_init_regs(struct nau8540 *nau8540) regmap_update_bits(regmap, NAU8540_REG_ADC_SAMPLE_RATE, NAU8540_CH_SYNC | NAU8540_ADC_OSR_MASK, NAU8540_CH_SYNC | NAU8540_ADC_OSR_64); + /* PGA input mode selection */ + regmap_update_bits(regmap, NAU8540_REG_FEPGA1, + NAU8540_FEPGA1_MODCH2_SHT | NAU8540_FEPGA1_MODCH1_SHT, + NAU8540_FEPGA1_MODCH2_SHT | NAU8540_FEPGA1_MODCH1_SHT); + regmap_update_bits(regmap, NAU8540_REG_FEPGA2, + NAU8540_FEPGA2_MODCH4_SHT | NAU8540_FEPGA2_MODCH3_SHT, + NAU8540_FEPGA2_MODCH4_SHT | NAU8540_FEPGA2_MODCH3_SHT); } static int __maybe_unused nau8540_suspend(struct snd_soc_codec *codec) |