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ASoC: tpa6130a2: Add support for regulator framework

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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>
This commit is contained in:
Ilkka Koskinen 2009-12-09 12:05:50 +02:00 committed by Mark Brown
parent 0fe692292a
commit 7c4e649220
1 changed files with 70 additions and 17 deletions
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87
sound/soc/codecs/tpa6130a2.c
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@ -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;