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>

diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c
index 6b650c1..0eb33d4 100644 (file)
--- a/sound/soc/codecs/tpa6130a2.c
+++ b/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;
 };
@@ -106,10 +114,11 @@ 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);
@@ -117,11 +126,20 @@ static void tpa6130a2_power(int power)
        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;