ASoC: tpa6130a2: Add support for regulator framework

Take the regulator framework in use for managing the power sources

Signed-off-by: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/tpa6130a2.c

@@ -25,6 +25,7 @@
 #include <linux/device.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
 #include <sound/tpa6130a2-plat.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
@@ -34,10 +35,17 @@
 
 static struct i2c_client *tpa6130a2_client;
 
+#define TPA6130A2_NUM_SUPPLIES 2
+static const char *tpa6130a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
+	"CPVSS",
+	"Vdd",
+};
+
 /* This struct is used to save the context */
 struct tpa6130a2_data {
 	struct mutex mutex;
 	unsigned char regs[TPA6130A2_CACHEREGNUM];
+	struct regulator_bulk_data supplies[TPA6130A2_NUM_SUPPLIES];
 	int power_gpio;
 	unsigned char power_state;
 };
@@ -106,22 +114,32 @@ static void tpa6130a2_initialize(void)
 		tpa6130a2_i2c_write(i, data->regs[i]);
 }
 
-static void tpa6130a2_power(int power)
+static int tpa6130a2_power(int power)
 {
 	struct	tpa6130a2_data *data;
 	u8	val;
+	int	ret;
 
 	BUG_ON(tpa6130a2_client == NULL);
 	data = i2c_get_clientdata(tpa6130a2_client);
 
 	mutex_lock(&data->mutex);
 	if (power) {
 		/* Power on */
-		if (data->power_gpio >= 0) {
+		if (data->power_gpio >= 0)
 			gpio_set_value(data->power_gpio, 1);
-			data->power_state = 1;
-			tpa6130a2_initialize();
+
+		ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies),
+					    data->supplies);
+		if (ret != 0) {
+			dev_err(&tpa6130a2_client->dev,
+				"Failed to enable supplies: %d\n", ret);
+			goto exit;
 		}
+
+		data->power_state = 1;
+		tpa6130a2_initialize();
+
 		/* Clear SWS */
 		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
 		val &= ~TPA6130A2_SWS;
@@ -131,13 +149,25 @@ static void tpa6130a2_power(int power)
 		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
 		val |= TPA6130A2_SWS;
 		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
+
 		/* Power off */
-		if (data->power_gpio >= 0) {
+		if (data->power_gpio >= 0)
 			gpio_set_value(data->power_gpio, 0);
-			data->power_state = 0;
+
+		ret = regulator_bulk_disable(ARRAY_SIZE(data->supplies),
+					     data->supplies);
+		if (ret != 0) {
+			dev_err(&tpa6130a2_client->dev,
+				"Failed to disable supplies: %d\n", ret);
+			goto exit;
 		}
+
+		data->power_state = 0;
 	}
+
+exit:
 	mutex_unlock(&data->mutex);
+	return ret;
 }
 
 static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
@@ -299,15 +329,17 @@ static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
 static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
 		struct snd_kcontrol *kcontrol, int event)
 {
+	int ret = 0;
+
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
-		tpa6130a2_power(1);
+		ret = tpa6130a2_power(1);
 		break;
 	case SND_SOC_DAPM_POST_PMD:
-		tpa6130a2_power(0);
+		ret = tpa6130a2_power(0);
 		break;
 	}
-	return 0;
+	return ret;
 }
 
 static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
@@ -352,7 +384,7 @@ static int tpa6130a2_probe(struct i2c_client *client,
 	struct device *dev;
 	struct tpa6130a2_data *data;
 	struct tpa6130a2_platform_data *pdata;
-	int ret;
+	int i, ret;
 
 	dev = &client->dev;
 
@@ -387,15 +419,25 @@ static int tpa6130a2_probe(struct i2c_client *client,
 		if (ret < 0) {
 			dev_err(dev, "Failed to request power GPIO (%d)\n",
 				data->power_gpio);
-			goto fail;
+			goto err_gpio;
 		}
 		gpio_direction_output(data->power_gpio, 0);
-	} else {
-		data->power_state = 1;
-		tpa6130a2_initialize();
 	}
 
-	tpa6130a2_power(1);
+	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
+		data->supplies[i].supply = tpa6130a2_supply_names[i];
+
+	ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
+				 data->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to request supplies: %d\n", ret);
+		goto err_regulator;
+	}
+
+	ret = tpa6130a2_power(1);
+	if (ret != 0)
+		goto err_power;
+
 
 	/* Read version */
 	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
@@ -404,10 +446,18 @@ static int tpa6130a2_probe(struct i2c_client *client,
 		dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
 
 	/* Disable the chip */
-	tpa6130a2_power(0);
+	ret = tpa6130a2_power(0);
+	if (ret != 0)
+		goto err_power;
 
 	return 0;
-fail:
+
+err_power:
+	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
+err_regulator:
+	if (data->power_gpio >= 0)
+		gpio_free(data->power_gpio);
+err_gpio:
 	kfree(data);
 	i2c_set_clientdata(tpa6130a2_client, NULL);
 	tpa6130a2_client = NULL;
@@ -423,6 +473,9 @@ static int tpa6130a2_remove(struct i2c_client *client)
 
 	if (data->power_gpio >= 0)
 		gpio_free(data->power_gpio);
+
+	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
+
 	kfree(data);
 	tpa6130a2_client = NULL;