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>

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 6b74ad8..584bc1e 100644 (file)
--- 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)