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authorJarkko Nikula <jhnikula@gmail.com>2010-05-05 13:02:03 +0300
committerLiam Girdwood <lrg@slimlogic.co.uk>2010-05-06 14:58:02 +0100
commit5193d62f1824cdfd72b5523be2b1cdb8049225ad (patch)
treebd83be284cce0a0f7dc71228fa946c0016801a5f
parent49100c98359a56ea4e8c9a76e3d625cdb25f25f5 (diff)
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ASoC: tlv320aic3x: Add platform data and reset gpio handling
Handle the reset GPIO within the codec driver in order to follow the startup protocol for the tlv320aic3x codecs. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
-rw-r--r--include/sound/tlv320aic3x.h17
-rw-r--r--sound/soc/codecs/tlv320aic3x.c25
2 files changed, 42 insertions, 0 deletions
diff --git a/include/sound/tlv320aic3x.h b/include/sound/tlv320aic3x.h
new file mode 100644
index 00000000000..b1a5f34e5cf
--- /dev/null
+++ b/include/sound/tlv320aic3x.h
@@ -0,0 +1,17 @@
+/*
+ * Platform data for Texas Instruments TLV320AIC3x codec
+ *
+ * Author: Jarkko Nikula <jhnikula@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __TLV320AIC3x_H__
+#define __TLV320AIC3x_H__
+
+struct aic3x_pdata {
+ int gpio_reset; /* < 0 if not used */
+};
+
+#endif \ No newline at end of file
diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index 584bc1e67f7..d57372be7a9 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/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/platform_device.h>
#include <sound/core.h>
@@ -47,6 +48,7 @@
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
+#include <sound/tlv320aic3x.h>
#include "tlv320aic3x.h"
@@ -64,6 +66,7 @@ struct aic3x_priv {
struct regulator_bulk_data supplies[AIC3X_NUM_SUPPLIES];
unsigned int sysclk;
int master;
+ int gpio_reset;
};
/*
@@ -1278,6 +1281,10 @@ static int aic3x_unregister(struct aic3x_priv *aic3x)
snd_soc_unregister_dai(&aic3x_dai);
snd_soc_unregister_codec(&aic3x->codec);
+ if (aic3x->gpio_reset >= 0) {
+ gpio_set_value(aic3x->gpio_reset, 0);
+ gpio_free(aic3x->gpio_reset);
+ }
regulator_bulk_disable(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
regulator_bulk_free(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
@@ -1302,6 +1309,7 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
{
struct snd_soc_codec *codec;
struct aic3x_priv *aic3x;
+ struct aic3x_pdata *pdata = i2c->dev.platform_data;
int ret, i;
aic3x = kzalloc(sizeof(struct aic3x_priv), GFP_KERNEL);
@@ -1318,6 +1326,15 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, aic3x);
+ aic3x->gpio_reset = -1;
+ if (pdata && pdata->gpio_reset >= 0) {
+ ret = gpio_request(pdata->gpio_reset, "tlv320aic3x reset");
+ if (ret != 0)
+ goto err_gpio;
+ aic3x->gpio_reset = pdata->gpio_reset;
+ gpio_direction_output(aic3x->gpio_reset, 0);
+ }
+
for (i = 0; i < ARRAY_SIZE(aic3x->supplies); i++)
aic3x->supplies[i].supply = aic3x_supply_names[i];
@@ -1335,11 +1352,19 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
goto err_enable;
}
+ if (aic3x->gpio_reset >= 0) {
+ udelay(1);
+ gpio_set_value(aic3x->gpio_reset, 1);
+ }
+
return aic3x_register(codec);
err_enable:
regulator_bulk_free(ARRAY_SIZE(aic3x->supplies), aic3x->supplies);
err_get:
+ if (aic3x->gpio_reset >= 0)
+ gpio_free(aic3x->gpio_reset);
+err_gpio:
kfree(aic3x);
return ret;
}