diff options
| author | Lucas Stach <l.stach@pengutronix.de> | 2019-11-18 16:12:06 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-11-18 17:11:47 +0100 |
| commit | e48fdb53bd1fa50796b5a050e6e31fde3891a2c8 (patch) | |
| tree | 18f52d2f93a59ae7db5ac80a42ad9161f8482955 /sound/soc/codecs/tlv320aic31xx.c | |
| parent | ASoC: SOF: Intel: Fix CFL and CML FW nocodec binary names. (diff) | |
| download | linux-e48fdb53bd1fa50796b5a050e6e31fde3891a2c8.tar.xz linux-e48fdb53bd1fa50796b5a050e6e31fde3891a2c8.zip | |
ASoC: tlv320aic31xx: configure output common-mode voltage
The tlv320aic31xx devices allow to adjust the output common-mode voltage
for best analog performance. The datasheet states that the common mode
voltage should be set to be <= AVDD/2.
This changes allows to configure the output common-mode voltage via a DT
property. If the property is absent the voltage is automatically chosen
as the highest voltage below/equal to AVDD/2.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20191118151207.28576-1-l.stach@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/tlv320aic31xx.c')
| -rw-r--r-- | sound/soc/codecs/tlv320aic31xx.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c index df627a08def9..f6f19fdc72f5 100644 --- a/sound/soc/codecs/tlv320aic31xx.c +++ b/sound/soc/codecs/tlv320aic31xx.c @@ -171,6 +171,7 @@ struct aic31xx_priv { int rate_div_line; bool master_dapm_route_applied; int irq; + u8 ocmv; /* output common-mode voltage */ }; struct aic31xx_rate_divs { @@ -1312,6 +1313,11 @@ static int aic31xx_codec_probe(struct snd_soc_component *component) if (ret) return ret; + /* set output common-mode voltage */ + snd_soc_component_update_bits(component, AIC31XX_HPDRIVER, + AIC31XX_HPD_OCMV_MASK, + aic31xx->ocmv << AIC31XX_HPD_OCMV_SHIFT); + return 0; } @@ -1501,6 +1507,43 @@ exit: return IRQ_NONE; } +static void aic31xx_configure_ocmv(struct aic31xx_priv *priv) +{ + struct device *dev = priv->dev; + int dvdd, avdd; + u32 value; + + if (dev->fwnode && + fwnode_property_read_u32(dev->fwnode, "ai31xx-ocmv", &value)) { + /* OCMV setting is forced by DT */ + if (value <= 3) { + priv->ocmv = value; + return; + } + } + + avdd = regulator_get_voltage(priv->supplies[3].consumer); + dvdd = regulator_get_voltage(priv->supplies[5].consumer); + + if (avdd > 3600000 || dvdd > 1950000) { + dev_warn(dev, + "Too high supply voltage(s) AVDD: %d, DVDD: %d\n", + avdd, dvdd); + } else if (avdd == 3600000 && dvdd == 1950000) { + priv->ocmv = AIC31XX_HPD_OCMV_1_8V; + } else if (avdd >= 3300000 && dvdd >= 1800000) { + priv->ocmv = AIC31XX_HPD_OCMV_1_65V; + } else if (avdd >= 3000000 && dvdd >= 1650000) { + priv->ocmv = AIC31XX_HPD_OCMV_1_5V; + } else if (avdd >= 2700000 && dvdd >= 1525000) { + priv->ocmv = AIC31XX_HPD_OCMV_1_35V; + } else { + dev_warn(dev, + "Invalid supply voltage(s) AVDD: %d, DVDD: %d\n", + avdd, dvdd); + } +} + static int aic31xx_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { @@ -1570,6 +1613,8 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c, return ret; } + aic31xx_configure_ocmv(aic31xx); + if (aic31xx->irq > 0) { regmap_update_bits(aic31xx->regmap, AIC31XX_GPIO1, AIC31XX_GPIO1_FUNC_MASK, |