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authorLucas Stach <l.stach@pengutronix.de>2019-11-18 16:12:06 +0100
committerMark Brown <broonie@kernel.org>2019-11-18 16:11:47 +0000
commite48fdb53bd1fa50796b5a050e6e31fde3891a2c8 (patch)
tree18f52d2f93a59ae7db5ac80a42ad9161f8482955 /sound/soc
parent653c28afa76b45c570370c3c3a89975c68c5fc8e (diff)
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')
-rw-r--r--sound/soc/codecs/tlv320aic31xx.c45
-rw-r--r--sound/soc/codecs/tlv320aic31xx.h8
2 files changed, 53 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,
diff --git a/sound/soc/codecs/tlv320aic31xx.h b/sound/soc/codecs/tlv320aic31xx.h
index cb024955c978..83a8c7604cc3 100644
--- a/sound/soc/codecs/tlv320aic31xx.h
+++ b/sound/soc/codecs/tlv320aic31xx.h
@@ -232,6 +232,14 @@ struct aic31xx_pdata {
#define AIC31XX_HSD_HP 0x01
#define AIC31XX_HSD_HS 0x03
+/* AIC31XX_HPDRIVER */
+#define AIC31XX_HPD_OCMV_MASK GENMASK(4, 3)
+#define AIC31XX_HPD_OCMV_SHIFT 3
+#define AIC31XX_HPD_OCMV_1_35V 0x0
+#define AIC31XX_HPD_OCMV_1_5V 0x1
+#define AIC31XX_HPD_OCMV_1_65V 0x2
+#define AIC31XX_HPD_OCMV_1_8V 0x3
+
/* AIC31XX_MICBIAS */
#define AIC31XX_MICBIAS_MASK GENMASK(1, 0)
#define AIC31XX_MICBIAS_SHIFT 0