From 25fb7062484a219174baab0761e06bbfd8fa3b07 Mon Sep 17 00:00:00 2001 From: Bard Liao <bardliao@realtek.com> Date: Mon, 17 Oct 2016 19:14:04 +0800 Subject: [PATCH] ASoC: rt5640: enable MCLK detection There is a power saving mechanism in rt5640. It will turn off some unused power when MCLK is not present. We call that "MCLK detection" and it should be enabled by default. Signed-off-by: Bard Liao <bardliao@realtek.com> Signed-off-by: Mark Brown <broonie@kernel.org> --- sound/soc/codecs/rt5640.c | 3 +++ sound/soc/codecs/rt5640.h | 2 ++ 2 files changed, 5 insertions(+) diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c index 3cc1135fc2cd1c..0a7378f81acb14 100644 --- a/sound/soc/codecs/rt5640.c +++ b/sound/soc/codecs/rt5640.c @@ -2407,6 +2407,9 @@ static int rt5640_i2c_probe(struct i2c_client *i2c, if (ret != 0) dev_warn(&i2c->dev, "Failed to apply regmap patch: %d\n", ret); + regmap_update_bits(rt5640->regmap, RT5640_DUMMY1, + RT5640_MCLK_DET, RT5640_MCLK_DET); + if (rt5640->pdata.in1_diff) regmap_update_bits(rt5640->regmap, RT5640_IN1_IN2, RT5640_IN_DF1, RT5640_IN_DF1); diff --git a/sound/soc/codecs/rt5640.h b/sound/soc/codecs/rt5640.h index 90c88711c72a22..22c017c58d5b3f 100644 --- a/sound/soc/codecs/rt5640.h +++ b/sound/soc/codecs/rt5640.h @@ -1970,6 +1970,8 @@ #define RT5640_ZCD_HP_DIS (0x0 << 15) #define RT5640_ZCD_HP_EN (0x1 << 15) +/* General Control 1 (0xfa) */ +#define RT5640_MCLK_DET (0x1 << 11) /* Codec Private Register definition */ /* 3D Speaker Control (0x63) */ -- GitLab