From: Eduardo Valentin <eduardo.valen...@nokia.com>
This patch adds initial usage of regulator framework to control avdd_dac
inside tlv320aic3x ASoC codec driver.
The refcount to avdd_dac is increased / decreased
only during probe and remove. Here it is still needed to implement
proper enable/disable regulator depending on chip usage. Now if driver
can get regulator for avdd_dac, then it will just let it on on probe
and then leave it off on remove.
Signed-off-by: Eduardo Valentin <eduardo.valen...@nokia.com>
---
sound/soc/codecs/tlv320aic3x.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 3395cf9..82e0a64 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -38,6 +38,7 @@
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
+#include <linux/regulator/consumer.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -56,6 +57,7 @@ struct aic3x_priv {
struct snd_soc_codec codec;
unsigned int sysclk;
int master;
+ struct regulator *regulator;
};
/*
@@ -1286,6 +1288,11 @@ static int aic3x_unregister(struct aic3x_priv *aic3x)
snd_soc_unregister_dai(&aic3x_dai);
snd_soc_unregister_codec(&aic3x->codec);
+ if (aic3x->regulator) {
+ regulator_disable(aic3x->regulator);
+ regulator_put(aic3x->regulator);
+ }
+
kfree(aic3x);
aic3x_codec = NULL;
@@ -1320,6 +1327,25 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
codec->control_data = i2c;
codec->hw_write = (hw_write_t) i2c_master_send;
+ aic3x->regulator = regulator_get(&i2c->dev, "avdd_dac");
+ if (IS_ERR(aic3x->regulator)) {
+ dev_warn(&i2c->dev, "No regulator to supply avdd_dac."
+ " Assuming always on.\n");
+ aic3x->regulator = NULL;
+ }
+
+ /*
+ * REVISIT: Need to add proper code to put into sleep mode
+ * avdd_dac regulator. For now, just leave it on.
+ */
+ if (aic3x->regulator) {
+ int err;
+
+ err = regulator_enable(aic3x->regulator);
+ if (err < 0)
+ return err;
+ }
+
i2c_set_clientdata(i2c, aic3x);
return aic3x_register(codec);
--
1.6.4.183.g04423
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