ASoC: ak5386: add regulator consumer support

The chip has two power supplies, VA and VDD. Enable them both as long
as the codec is in use.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/codecs/ak5386.c

@@ -14,12 +14,18 @@
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
 #include <sound/soc.h>
 #include <sound/pcm.h>
 #include <sound/initval.h>
 
+static const char const *supply_names[] = {
+	"va", "vd"
+};
+
 struct ak5386_priv {
 	int reset_gpio;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
 };
 
 static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = {
@@ -32,7 +38,42 @@ static const struct snd_soc_dapm_route ak5386_dapm_routes[] = {
 	{ "Capture", NULL, "AINR" },
 };
 
+static int ak5386_soc_probe(struct snd_soc_codec *codec)
+{
+	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
+	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+}
+
+static int ak5386_soc_remove(struct snd_soc_codec *codec)
+{
+	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
+	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int ak5386_soc_suspend(struct snd_soc_codec *codec)
+{
+	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
+	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
+	return 0;
+}
+
+static int ak5386_soc_resume(struct snd_soc_codec *codec)
+{
+	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
+	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+}
+#else
+#define ak5386_soc_suspend	NULL
+#define ak5386_soc_resume	NULL
+#endif /* CONFIG_PM */
+
 static struct snd_soc_codec_driver soc_codec_ak5386 = {
+	.probe = ak5386_soc_probe,
+	.remove = ak5386_soc_remove,
+	.suspend = ak5386_soc_suspend,
+	.resume = ak5386_soc_resume,
 	.dapm_widgets = ak5386_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets),
 	.dapm_routes = ak5386_dapm_routes,
@@ -122,6 +163,7 @@ static int ak5386_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct ak5386_priv *priv;
+	int ret, i;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -130,6 +172,14 @@ static int ak5386_probe(struct platform_device *pdev)
 	priv->reset_gpio = -EINVAL;
 	dev_set_drvdata(dev, priv);
 
+	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)
+		return ret;
+
 	if (of_match_device(of_match_ptr(ak5386_dt_ids), dev))
 		priv->reset_gpio = of_get_named_gpio(dev->of_node,
 						      "reset-gpio", 0);