ASoC: tlv320aic3x: Add basic regulator support

This patch adds the TLV320AIC3x supplies and enables all of them for the
entire lifetime of the device.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 37 insertions, 0 deletions

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 6b74ad808a09..584bc1e67f76 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -38,6 +38,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
+#include <linux/regulator/consumer.h>
 #include <linux/platform_device.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -49,9 +50,18 @@
 
 #include "tlv320aic3x.h"
 
+#define AIC3X_NUM_SUPPLIES      4
+static const char *aic3x_supply_names[AIC3X_NUM_SUPPLIES] = {
+        "IOVDD",        /* I/O Voltage */
+        "DVDD",         /* Digital Core Voltage */
+        "AVDD",         /* Analog DAC Voltage */
+        "DRVDD",        /* ADC Analog and Output Driver Voltage */
+};
+
 /* codec private data */
 struct aic3x_priv {
         struct snd_soc_codec codec;
+        struct regulator_bulk_data supplies[AIC3X_NUM_SUPPLIES];
         unsigned int sysclk;
         int master;
 };
@@ -1268,6 +1278,9 @@ static int aic3x_unregister(struct aic3x_priv *aic3x)
         snd_soc_unregister_dai(&aic3x_dai);
         snd_soc_unregister_codec(&aic3x->codec);
 
+        regulator_bulk_disable(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
+        regulator_bulk_free(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
+
         kfree(aic3x);
         aic3x_codec = NULL;
 
@@ -1289,6 +1302,7 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
 {
         struct snd_soc_codec *codec;
         struct aic3x_priv *aic3x;
+        int ret, i;
 
         aic3x = kzalloc(sizeof(struct aic3x_priv), GFP_KERNEL);
         if (aic3x == NULL) {
@@ -1304,7 +1318,30 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
 
         i2c_set_clientdata(i2c, aic3x);
 
+        for (i = 0; i < ARRAY_SIZE(aic3x->supplies); i++)
+                aic3x->supplies[i].supply = aic3x_supply_names[i];
+
+        ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(aic3x->supplies),
+                                 aic3x->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+                goto err_get;
+        }
+
+        ret = regulator_bulk_enable(ARRAY_SIZE(aic3x->supplies),
+                                    aic3x->supplies);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+                goto err_enable;
+        }
+
         return aic3x_register(codec);
+
+err_enable:
+        regulator_bulk_free(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
+err_get:
+        kfree(aic3x);
+        return ret;
 }
 
 static int aic3x_i2c_remove(struct i2c_client *client)