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Subject[PATCH 3/7] ASoC: cs42l51: add reset management
Date
Manage cs42l51 audio codec reset pin.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
---
sound/soc/codecs/cs42l51.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/sound/soc/codecs/cs42l51.c b/sound/soc/codecs/cs42l51.c
index f43eb51d2d8d..9b3ffa16b204 100644
--- a/sound/soc/codecs/cs42l51.c
+++ b/sound/soc/codecs/cs42l51.c
@@ -30,6 +30,7 @@
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/pcm.h>
+#include <linux/gpio/consumer.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>

@@ -54,6 +55,7 @@ struct cs42l51_private {
unsigned int audio_mode; /* The mode (I2S or left-justified) */
enum master_slave_mode func;
struct regulator_bulk_data supplies[ARRAY_SIZE(cs42l51_supply_names)];
+ struct gpio_desc *reset_gpio;
};

#define CS42L51_FORMATS ( \
@@ -595,6 +597,17 @@ int cs42l51_probe(struct device *dev, struct regmap *regmap)
return ret;
}

+ cs42l51->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(cs42l51->reset_gpio))
+ return PTR_ERR(cs42l51->reset_gpio);
+
+ if (cs42l51->reset_gpio) {
+ dev_dbg(dev, "Release reset gpio\n");
+ gpiod_set_value_cansleep(cs42l51->reset_gpio, 0);
+ mdelay(2);
+ }
+
/* Verify that we have a CS42L51 */
ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
if (ret < 0) {
@@ -629,6 +642,8 @@ int cs42l51_remove(struct device *dev)
{
struct cs42l51_private *cs42l51 = dev_get_drvdata(dev);

+ gpiod_set_value_cansleep(cs42l51->reset_gpio, 1);
+
return regulator_bulk_disable(ARRAY_SIZE(cs42l51->supplies),
cs42l51->supplies);
}
--
2.7.4
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