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authorDaniel Mack <zonque@gmail.com>2014-03-27 21:42:15 +0100
committerMark Brown <broonie@linaro.org>2014-04-23 13:20:07 +0100
commitb38d10ed604a1adaafa82512867d0eb7e219d491 (patch)
treea66e23204211f930802c72d13ba5364a3efbc2d2 /sound/soc/codecs/ak4104.c
parentc9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff)
ASoC: ak4104: add regulator consumer support
The AK4104 has only one power supply, called VDD. Enable it as long as the codec is in use. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/codecs/ak4104.c')
-rw-r--r--sound/soc/codecs/ak4104.c62
1 files changed, 55 insertions, 7 deletions
diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
index 10adf25d4c14..1fd7f72b2a62 100644
--- a/sound/soc/codecs/ak4104.c
+++ b/sound/soc/codecs/ak4104.c
@@ -11,13 +11,14 @@
#include <linux/module.h>
#include <linux/slab.h>
-#include <sound/core.h>
-#include <sound/soc.h>
-#include <sound/initval.h>
#include <linux/spi/spi.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
#include <sound/asoundef.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
/* AK4104 registers addresses */
#define AK4104_REG_CONTROL1 0x00
@@ -47,6 +48,7 @@
struct ak4104_private {
struct regmap *regmap;
+ struct regulator *regulator;
};
static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
@@ -174,20 +176,30 @@ static int ak4104_probe(struct snd_soc_codec *codec)
struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
int ret;
+ ret = regulator_enable(ak4104->regulator);
+ if (ret < 0) {
+ dev_err(codec->dev, "Unable to enable regulator: %d\n", ret);
+ return ret;
+ }
+
/* set power-up and non-reset bits */
ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
if (ret < 0)
- return ret;
+ goto exit_disable_regulator;
/* enable transmitter */
ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
AK4104_TX_TXE, AK4104_TX_TXE);
if (ret < 0)
- return ret;
+ goto exit_disable_regulator;
return 0;
+
+exit_disable_regulator:
+ regulator_disable(ak4104->regulator);
+ return ret;
}
static int ak4104_remove(struct snd_soc_codec *codec)
@@ -196,13 +208,42 @@ static int ak4104_remove(struct snd_soc_codec *codec)
regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
+ regulator_disable(ak4104->regulator);
return 0;
}
+#ifdef CONFIG_PM
+static int ak4104_soc_suspend(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
+
+ regulator_disable(priv->regulator);
+
+ return 0;
+}
+
+static int ak4104_soc_resume(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ ret = regulator_enable(priv->regulator);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+#else
+#define ak4104_soc_suspend NULL
+#define ak4104_soc_resume NULL
+#endif /* CONFIG_PM */
+
static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
- .probe = ak4104_probe,
- .remove = ak4104_remove,
+ .probe = ak4104_probe,
+ .remove = ak4104_remove,
+ .suspend = ak4104_soc_suspend,
+ .resume = ak4104_soc_resume,
.dapm_widgets = ak4104_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
@@ -239,6 +280,13 @@ static int ak4104_spi_probe(struct spi_device *spi)
if (ak4104 == NULL)
return -ENOMEM;
+ ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
+ if (IS_ERR(ak4104->regulator)) {
+ ret = PTR_ERR(ak4104->regulator);
+ dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
+ return ret;
+ }
+
ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
if (IS_ERR(ak4104->regmap)) {
ret = PTR_ERR(ak4104->regmap);