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From: Steve Lee <steve.lee.analog@gmail.com>
To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org
Cc: alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, ryans.lee@maximintegrated.com,
	Steve Lee <steve.lee.analog@gmail.com>
Subject: [V2 1/2] ASoC: max98390: Add reset gpio control
Date: Fri, 11 Mar 2022 22:29:05 +0900	[thread overview]
Message-ID: <20220311132906.32292-1-steve.lee.analog@gmail.com> (raw)

 Add reset gpio control to support RESET PIN connected to gpio.

Signed-off-by: Steve Lee <steve.lee.analog@gmail.com>
---
 sound/soc/codecs/max98390.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/soc/codecs/max98390.c b/sound/soc/codecs/max98390.c
index b392567c2b3e..5c6162701667 100644
--- a/sound/soc/codecs/max98390.c
+++ b/sound/soc/codecs/max98390.c
@@ -1022,6 +1022,7 @@ static int max98390_i2c_probe(struct i2c_client *i2c,
 
 	struct max98390_priv *max98390 = NULL;
 	struct i2c_adapter *adapter = to_i2c_adapter(i2c->dev.parent);
+	struct gpio_desc *reset_gpio;
 
 	ret = i2c_check_functionality(adapter,
 		I2C_FUNC_SMBUS_BYTE
@@ -1073,6 +1074,17 @@ static int max98390_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
+	reset_gpio = devm_gpiod_get_optional(&i2c->dev,
+						"maxim,reset-gpios", GPIOD_OUT_LOW);
+
+	/* Power on device */
+	if (reset_gpio) {
+		usleep_range(1000, 2000);
+		/* bring out of reset */
+		gpiod_set_value_cansleep(reset_gpio, 1);
+		usleep_range(1000, 2000);
+	}
+
 	/* Check Revision ID */
 	ret = regmap_read(max98390->regmap,
 		MAX98390_R24FF_REV_ID, &reg);
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Steve Lee <steve.lee.analog@gmail.com>
To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org
Cc: Steve Lee <steve.lee.analog@gmail.com>,
	devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
	linux-kernel@vger.kernel.org, ryans.lee@maximintegrated.com
Subject: [V2 1/2] ASoC: max98390: Add reset gpio control
Date: Fri, 11 Mar 2022 22:29:05 +0900	[thread overview]
Message-ID: <20220311132906.32292-1-steve.lee.analog@gmail.com> (raw)

 Add reset gpio control to support RESET PIN connected to gpio.

Signed-off-by: Steve Lee <steve.lee.analog@gmail.com>
---
 sound/soc/codecs/max98390.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/soc/codecs/max98390.c b/sound/soc/codecs/max98390.c
index b392567c2b3e..5c6162701667 100644
--- a/sound/soc/codecs/max98390.c
+++ b/sound/soc/codecs/max98390.c
@@ -1022,6 +1022,7 @@ static int max98390_i2c_probe(struct i2c_client *i2c,
 
 	struct max98390_priv *max98390 = NULL;
 	struct i2c_adapter *adapter = to_i2c_adapter(i2c->dev.parent);
+	struct gpio_desc *reset_gpio;
 
 	ret = i2c_check_functionality(adapter,
 		I2C_FUNC_SMBUS_BYTE
@@ -1073,6 +1074,17 @@ static int max98390_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
+	reset_gpio = devm_gpiod_get_optional(&i2c->dev,
+						"maxim,reset-gpios", GPIOD_OUT_LOW);
+
+	/* Power on device */
+	if (reset_gpio) {
+		usleep_range(1000, 2000);
+		/* bring out of reset */
+		gpiod_set_value_cansleep(reset_gpio, 1);
+		usleep_range(1000, 2000);
+	}
+
 	/* Check Revision ID */
 	ret = regmap_read(max98390->regmap,
 		MAX98390_R24FF_REV_ID, &reg);
-- 
2.17.1


             reply	other threads:[~2022-03-11 13:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-11 13:29 Steve Lee [this message]
2022-03-11 13:29 ` [V2 1/2] ASoC: max98390: Add reset gpio control Steve Lee
2022-03-11 13:29 ` [V2 2/2] ASoC: dt-bindings: max98390: add reset gpio bindings Steve Lee
2022-03-11 13:29   ` Steve Lee
2022-03-11 15:51   ` Rob Herring
2022-03-11 15:51     ` Rob Herring
2022-03-11 16:33 ` [PATCH v2 1/2] ASoC: max98390: Add reset gpio control Mark Brown
2022-03-11 16:33   ` Mark Brown
2022-03-11 22:24   ` Lee Steve
2022-03-11 22:24     ` Lee Steve
2022-04-21 17:24 ` [V2 " Mark Brown
2022-04-21 17:24   ` Mark Brown

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