[alsa-devel] [PATCH 3/3] ASoC: tas5086: add regulator consumer support

[Daniel Mack]

The TAS5086 has two power domains, DVDD and AVDD. Add support for
regulators to the TAS5086 codec driver.

Signed-off-by: Daniel Mack <zonque at gmail.com>
---
 sound/soc/codecs/tas5086.c | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/tas5086.c b/sound/soc/codecs/tas5086.c
index a895a5e..e87a577 100644
--- a/sound/soc/codecs/tas5086.c
+++ b/sound/soc/codecs/tas5086.c
@@ -36,6 +36,7 @@
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -240,6 +241,10 @@ static int tas5086_reg_read(void *context, unsigned int reg,
 	return 0;
 }
 
+static const char *supply_names[] = {
+	"dvdd", "avdd"
+};
+
 struct tas5086_private {
 	struct regmap	*regmap;
 	unsigned int	mclk, sclk;
@@ -251,6 +256,7 @@ struct tas5086_private {
 	int		rate;
 	/* GPIO driving Reset pin, if any */
 	int		gpio_nreset;
+	struct		regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
 };
 
 static int tas5086_deemph[] = { 0, 32000, 44100, 48000 };
@@ -773,6 +779,8 @@ static int tas5086_soc_suspend(struct snd_soc_codec *codec)
 	if (ret < 0)
 		return ret;
 
+	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+
 	return 0;
 }
 
@@ -781,6 +789,10 @@ static int tas5086_soc_resume(struct snd_soc_codec *codec)
 	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
 	int ret;
 
+	ret = regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+	if (ret < 0)
+		return ret;
+
 	tas5086_reset(priv);
 	regcache_mark_dirty(priv->regmap);
 
@@ -812,6 +824,12 @@ static int tas5086_probe(struct snd_soc_codec *codec)
 	struct tas5086_private *priv = snd_soc_codec_get_drvdata(codec);
 	int i, ret;
 
+	ret = regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to enable regulators: %d\n", ret);
+		return ret;
+	}
+
 	priv->pwm_start_mid_z = 0;
 	priv->charge_period = 1300000; /* hardware default is 1300 ms */
 
@@ -834,14 +852,19 @@ static int tas5086_probe(struct snd_soc_codec *codec)
 
 	ret = tas5086_init(codec->dev, priv);
 	if (ret < 0)
-		return ret;
+		goto exit_disable_regulators;
 
 	/* set master volume to 0 dB */
 	ret = regmap_write(priv->regmap, TAS5086_MASTER_VOL, 0x30);
 	if (ret < 0)
-		return ret;
+		goto exit_disable_regulators;
 
 	return 0;
+
+exit_disable_regulators:
+	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+
+	return ret;
 }
 
 static int tas5086_remove(struct snd_soc_codec *codec)
@@ -852,6 +875,8 @@ static int tas5086_remove(struct snd_soc_codec *codec)
 		/* Set codec to the reset state */
 		gpio_set_value(priv->gpio_nreset, 0);
 
+	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+
 	return 0;
 };
 
@@ -900,6 +925,16 @@ static int tas5086_i2c_probe(struct i2c_client *i2c,
 	if (!priv)
 		return -ENOMEM;
 
+	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
+		priv->supplies[i].supply = supply_names[i];
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
+				      priv->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to get regulators: %d\n", ret);
+		return ret;
+	}
+
 	priv->regmap = devm_regmap_init(dev, NULL, i2c, &tas5086_regmap);
 	if (IS_ERR(priv->regmap)) {
 		ret = PTR_ERR(priv->regmap);
-- 
1.8.5.3