summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--Documentation/devicetree/bindings/sound/sgtl5000.txt9
-rw-r--r--sound/soc/codecs/sgtl5000.c19
2 files changed, 27 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/sound/sgtl5000.txt b/Documentation/devicetree/bindings/sound/sgtl5000.txt
index 5666da7b8605..7a73a9d62015 100644
--- a/Documentation/devicetree/bindings/sound/sgtl5000.txt
+++ b/Documentation/devicetree/bindings/sound/sgtl5000.txt
@@ -26,6 +26,15 @@ Optional properties:
If this node is not mentioned or the value is unknown, then
the value is set to 1.25V.
+- lrclk-strength: the LRCLK pad strength. Possible values are:
+0, 1, 2 and 3 as per the table below:
+
+VDDIO 1.8V 2.5V 3.3V
+0 = Disable
+1 = 1.66 mA 2.87 mA 4.02 mA
+2 = 3.33 mA 5.74 mA 8.03 mA
+3 = 4.99 mA 8.61 mA 12.05 mA
+
Example:
codec: sgtl5000@0a {
diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 1589325855bc..5a2702edeb77 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -99,6 +99,13 @@ enum sgtl5000_micbias_resistor {
SGTL5000_MICBIAS_8K = 8,
};
+enum {
+ I2S_LRCLK_STRENGTH_DISABLE,
+ I2S_LRCLK_STRENGTH_LOW,
+ I2S_LRCLK_STRENGTH_MEDIUM,
+ I2S_LRCLK_STRENGTH_HIGH,
+};
+
/* sgtl5000 private structure in codec */
struct sgtl5000_priv {
int sysclk; /* sysclk rate */
@@ -111,6 +118,7 @@ struct sgtl5000_priv {
int revision;
u8 micbias_resistor;
u8 micbias_voltage;
+ u8 lrclk_strength;
};
/*
@@ -1089,6 +1097,7 @@ static int sgtl5000_enable_regulators(struct i2c_client *client)
static int sgtl5000_probe(struct snd_soc_codec *codec)
{
int ret;
+ u16 reg;
struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec);
/* power up sgtl5000 */
@@ -1118,7 +1127,8 @@ static int sgtl5000_probe(struct snd_soc_codec *codec)
SGTL5000_DAC_MUTE_RIGHT |
SGTL5000_DAC_MUTE_LEFT);
- snd_soc_write(codec, SGTL5000_CHIP_PAD_STRENGTH, 0x015f);
+ reg = ((sgtl5000->lrclk_strength) << SGTL5000_PAD_I2S_LRCLK_SHIFT | 0x5f);
+ snd_soc_write(codec, SGTL5000_CHIP_PAD_STRENGTH, reg);
snd_soc_write(codec, SGTL5000_CHIP_ANA_CTRL,
SGTL5000_HP_ZCD_EN |
@@ -1347,6 +1357,13 @@ static int sgtl5000_i2c_probe(struct i2c_client *client,
}
}
+ sgtl5000->lrclk_strength = I2S_LRCLK_STRENGTH_LOW;
+ if (!of_property_read_u32(np, "lrclk-strength", &value)) {
+ if (value > I2S_LRCLK_STRENGTH_HIGH)
+ value = I2S_LRCLK_STRENGTH_LOW;
+ sgtl5000->lrclk_strength = value;
+ }
+
/* Ensure sgtl5000 will start with sane register values */
sgtl5000_fill_defaults(client);