Linux-IIO Archive on lore.kernel.org
 help / Atom feed
* [PATCH V7] iio: magnetometer: mag3110: add vdd/vddio regulator operation support
@ 2019-01-08  9:16 Anson Huang
  2019-01-12 19:00 ` Jonathan Cameron
  0 siblings, 1 reply; 2+ messages in thread
From: Anson Huang @ 2019-01-08  9:16 UTC (permalink / raw)
  To: jic23, knaack.h, lars, pmeerw, rtresidd, linux-iio, linux-kernel
  Cc: dl-linux-imx

The magnetometer's power supplies could be controllable on some platforms,
such as i.MX6Q-SABRESD board, the mag3110's power supplies are controlled
by a GPIO fixed regulator, need to make sure the regulators are enabled
before any communication with mag3110, this patch adds vdd/vddio regulator
operation support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
ChangeLog Since V6:
  - separate the error handling of regulators get to make code easy to read.
---
 drivers/iio/magnetometer/mag3110.c | 94 ++++++++++++++++++++++++++++++++++----
 1 file changed, 86 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
index f063355..dd990cd 100644
--- a/drivers/iio/magnetometer/mag3110.c
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -20,6 +20,7 @@
 #include <linux/iio/buffer.h>
 #include <linux/iio/triggered_buffer.h>
 #include <linux/delay.h>
+#include <linux/regulator/consumer.h>
 
 #define MAG3110_STATUS 0x00
 #define MAG3110_OUT_X 0x01 /* MSB first */
@@ -56,6 +57,8 @@ struct mag3110_data {
 	struct mutex lock;
 	u8 ctrl_reg1;
 	int sleep_val;
+	struct regulator *vdd_reg;
+	struct regulator *vddio_reg;
 };
 
 static int mag3110_request(struct mag3110_data *data)
@@ -469,17 +472,50 @@ static int mag3110_probe(struct i2c_client *client,
 	struct iio_dev *indio_dev;
 	int ret;
 
-	ret = i2c_smbus_read_byte_data(client, MAG3110_WHO_AM_I);
-	if (ret < 0)
-		return ret;
-	if (ret != MAG3110_DEVICE_ID)
-		return -ENODEV;
-
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
+
+	data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
+	if (IS_ERR(data->vdd_reg)) {
+		if (PTR_ERR(data->vdd_reg) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		dev_err(&client->dev, "failed to get VDD regulator!\n");
+		return PTR_ERR(data->vdd_reg);
+	}
+
+	data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
+	if (IS_ERR(data->vddio_reg)) {
+		if (PTR_ERR(data->vddio_reg) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		dev_err(&client->dev, "failed to get VDDIO regulator!\n");
+		return PTR_ERR(data->vddio_reg);
+	}
+
+	ret = regulator_enable(data->vdd_reg);
+	if (ret) {
+		dev_err(&client->dev, "failed to enable VDD regulator!\n");
+		return ret;
+	}
+
+	ret = regulator_enable(data->vddio_reg);
+	if (ret) {
+		dev_err(&client->dev, "failed to enable VDDIO regulator!\n");
+		goto disable_regulator_vdd;
+	}
+
+	ret = i2c_smbus_read_byte_data(client, MAG3110_WHO_AM_I);
+	if (ret < 0)
+		goto disable_regulators;
+	if (ret != MAG3110_DEVICE_ID) {
+		ret = -ENODEV;
+		goto disable_regulators;
+	}
+
 	data->client = client;
 	mutex_init(&data->lock);
 
@@ -499,7 +535,7 @@ static int mag3110_probe(struct i2c_client *client,
 
 	ret = mag3110_change_config(data, MAG3110_CTRL_REG1, data->ctrl_reg1);
 	if (ret < 0)
-		return ret;
+		goto disable_regulators;
 
 	ret = i2c_smbus_write_byte_data(client, MAG3110_CTRL_REG2,
 		MAG3110_CTRL_AUTO_MRST_EN);
@@ -520,16 +556,24 @@ static int mag3110_probe(struct i2c_client *client,
 	iio_triggered_buffer_cleanup(indio_dev);
 standby_on_error:
 	mag3110_standby(iio_priv(indio_dev));
+disable_regulators:
+	regulator_disable(data->vddio_reg);
+disable_regulator_vdd:
+	regulator_disable(data->vdd_reg);
+
 	return ret;
 }
 
 static int mag3110_remove(struct i2c_client *client)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct mag3110_data *data = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
 	iio_triggered_buffer_cleanup(indio_dev);
 	mag3110_standby(iio_priv(indio_dev));
+	regulator_disable(data->vddio_reg);
+	regulator_disable(data->vdd_reg);
 
 	return 0;
 }
@@ -537,14 +581,48 @@ static int mag3110_remove(struct i2c_client *client)
 #ifdef CONFIG_PM_SLEEP
 static int mag3110_suspend(struct device *dev)
 {
-	return mag3110_standby(iio_priv(i2c_get_clientdata(
+	struct mag3110_data *data = iio_priv(i2c_get_clientdata(
+		to_i2c_client(dev)));
+	int ret;
+
+	ret = mag3110_standby(iio_priv(i2c_get_clientdata(
 		to_i2c_client(dev))));
+	if (ret)
+		return ret;
+
+	ret = regulator_disable(data->vddio_reg);
+	if (ret) {
+		dev_err(dev, "failed to disable VDDIO regulator\n");
+		return ret;
+	}
+
+	ret = regulator_disable(data->vdd_reg);
+	if (ret) {
+		dev_err(dev, "failed to disable VDD regulator\n");
+		return ret;
+	}
+
+	return 0;
 }
 
 static int mag3110_resume(struct device *dev)
 {
 	struct mag3110_data *data = iio_priv(i2c_get_clientdata(
 		to_i2c_client(dev)));
+	int ret;
+
+	ret = regulator_enable(data->vdd_reg);
+	if (ret) {
+		dev_err(dev, "failed to enable VDD regulator\n");
+		return ret;
+	}
+
+	ret = regulator_enable(data->vddio_reg);
+	if (ret) {
+		dev_err(dev, "failed to enable VDDIO regulator\n");
+		regulator_disable(data->vdd_reg);
+		return ret;
+	}
 
 	return i2c_smbus_write_byte_data(data->client, MAG3110_CTRL_REG1,
 		data->ctrl_reg1);
-- 
2.7.4


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH V7] iio: magnetometer: mag3110: add vdd/vddio regulator operation support
  2019-01-08  9:16 [PATCH V7] iio: magnetometer: mag3110: add vdd/vddio regulator operation support Anson Huang
@ 2019-01-12 19:00 ` Jonathan Cameron
  0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Cameron @ 2019-01-12 19:00 UTC (permalink / raw)
  To: Anson Huang
  Cc: knaack.h, lars, pmeerw, rtresidd, linux-iio, linux-kernel, dl-linux-imx

On Tue, 8 Jan 2019 09:16:04 +0000
Anson Huang <anson.huang@nxp.com> wrote:

> The magnetometer's power supplies could be controllable on some platforms,
> such as i.MX6Q-SABRESD board, the mag3110's power supplies are controlled
> by a GPIO fixed regulator, need to make sure the regulators are enabled
> before any communication with mag3110, this patch adds vdd/vddio regulator
> operation support.
> 
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Thanks for you persistence on these.

Applied to the togreg branch of iio.git and pushed out as testing to let
the autobuilders see if we missed anything.

Thanks,
Jonathan

> ---
> ChangeLog Since V6:
>   - separate the error handling of regulators get to make code easy to read.
> ---
>  drivers/iio/magnetometer/mag3110.c | 94 ++++++++++++++++++++++++++++++++++----
>  1 file changed, 86 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
> index f063355..dd990cd 100644
> --- a/drivers/iio/magnetometer/mag3110.c
> +++ b/drivers/iio/magnetometer/mag3110.c
> @@ -20,6 +20,7 @@
>  #include <linux/iio/buffer.h>
>  #include <linux/iio/triggered_buffer.h>
>  #include <linux/delay.h>
> +#include <linux/regulator/consumer.h>
>  
>  #define MAG3110_STATUS 0x00
>  #define MAG3110_OUT_X 0x01 /* MSB first */
> @@ -56,6 +57,8 @@ struct mag3110_data {
>  	struct mutex lock;
>  	u8 ctrl_reg1;
>  	int sleep_val;
> +	struct regulator *vdd_reg;
> +	struct regulator *vddio_reg;
>  };
>  
>  static int mag3110_request(struct mag3110_data *data)
> @@ -469,17 +472,50 @@ static int mag3110_probe(struct i2c_client *client,
>  	struct iio_dev *indio_dev;
>  	int ret;
>  
> -	ret = i2c_smbus_read_byte_data(client, MAG3110_WHO_AM_I);
> -	if (ret < 0)
> -		return ret;
> -	if (ret != MAG3110_DEVICE_ID)
> -		return -ENODEV;
> -
>  	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
>  	if (!indio_dev)
>  		return -ENOMEM;
>  
>  	data = iio_priv(indio_dev);
> +
> +	data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
> +	if (IS_ERR(data->vdd_reg)) {
> +		if (PTR_ERR(data->vdd_reg) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;
> +
> +		dev_err(&client->dev, "failed to get VDD regulator!\n");
> +		return PTR_ERR(data->vdd_reg);
> +	}
> +
> +	data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
> +	if (IS_ERR(data->vddio_reg)) {
> +		if (PTR_ERR(data->vddio_reg) == -EPROBE_DEFER)
> +			return -EPROBE_DEFER;
> +
> +		dev_err(&client->dev, "failed to get VDDIO regulator!\n");
> +		return PTR_ERR(data->vddio_reg);
> +	}
> +
> +	ret = regulator_enable(data->vdd_reg);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to enable VDD regulator!\n");
> +		return ret;
> +	}
> +
> +	ret = regulator_enable(data->vddio_reg);
> +	if (ret) {
> +		dev_err(&client->dev, "failed to enable VDDIO regulator!\n");
> +		goto disable_regulator_vdd;
> +	}
> +
> +	ret = i2c_smbus_read_byte_data(client, MAG3110_WHO_AM_I);
> +	if (ret < 0)
> +		goto disable_regulators;
> +	if (ret != MAG3110_DEVICE_ID) {
> +		ret = -ENODEV;
> +		goto disable_regulators;
> +	}
> +
>  	data->client = client;
>  	mutex_init(&data->lock);
>  
> @@ -499,7 +535,7 @@ static int mag3110_probe(struct i2c_client *client,
>  
>  	ret = mag3110_change_config(data, MAG3110_CTRL_REG1, data->ctrl_reg1);
>  	if (ret < 0)
> -		return ret;
> +		goto disable_regulators;
>  
>  	ret = i2c_smbus_write_byte_data(client, MAG3110_CTRL_REG2,
>  		MAG3110_CTRL_AUTO_MRST_EN);
> @@ -520,16 +556,24 @@ static int mag3110_probe(struct i2c_client *client,
>  	iio_triggered_buffer_cleanup(indio_dev);
>  standby_on_error:
>  	mag3110_standby(iio_priv(indio_dev));
> +disable_regulators:
> +	regulator_disable(data->vddio_reg);
> +disable_regulator_vdd:
> +	regulator_disable(data->vdd_reg);
> +
>  	return ret;
>  }
>  
>  static int mag3110_remove(struct i2c_client *client)
>  {
>  	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> +	struct mag3110_data *data = iio_priv(indio_dev);
>  
>  	iio_device_unregister(indio_dev);
>  	iio_triggered_buffer_cleanup(indio_dev);
>  	mag3110_standby(iio_priv(indio_dev));
> +	regulator_disable(data->vddio_reg);
> +	regulator_disable(data->vdd_reg);
>  
>  	return 0;
>  }
> @@ -537,14 +581,48 @@ static int mag3110_remove(struct i2c_client *client)
>  #ifdef CONFIG_PM_SLEEP
>  static int mag3110_suspend(struct device *dev)
>  {
> -	return mag3110_standby(iio_priv(i2c_get_clientdata(
> +	struct mag3110_data *data = iio_priv(i2c_get_clientdata(
> +		to_i2c_client(dev)));
> +	int ret;
> +
> +	ret = mag3110_standby(iio_priv(i2c_get_clientdata(
>  		to_i2c_client(dev))));
> +	if (ret)
> +		return ret;
> +
> +	ret = regulator_disable(data->vddio_reg);
> +	if (ret) {
> +		dev_err(dev, "failed to disable VDDIO regulator\n");
> +		return ret;
> +	}
> +
> +	ret = regulator_disable(data->vdd_reg);
> +	if (ret) {
> +		dev_err(dev, "failed to disable VDD regulator\n");
> +		return ret;
> +	}
> +
> +	return 0;
>  }
>  
>  static int mag3110_resume(struct device *dev)
>  {
>  	struct mag3110_data *data = iio_priv(i2c_get_clientdata(
>  		to_i2c_client(dev)));
> +	int ret;
> +
> +	ret = regulator_enable(data->vdd_reg);
> +	if (ret) {
> +		dev_err(dev, "failed to enable VDD regulator\n");
> +		return ret;
> +	}
> +
> +	ret = regulator_enable(data->vddio_reg);
> +	if (ret) {
> +		dev_err(dev, "failed to enable VDDIO regulator\n");
> +		regulator_disable(data->vdd_reg);
> +		return ret;
> +	}
>  
>  	return i2c_smbus_write_byte_data(data->client, MAG3110_CTRL_REG1,
>  		data->ctrl_reg1);


^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, back to index

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-08  9:16 [PATCH V7] iio: magnetometer: mag3110: add vdd/vddio regulator operation support Anson Huang
2019-01-12 19:00 ` Jonathan Cameron

Linux-IIO Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-iio/0 linux-iio/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-iio linux-iio/ https://lore.kernel.org/linux-iio \
		linux-iio@vger.kernel.org linux-iio@archiver.kernel.org
	public-inbox-index linux-iio


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-iio


AGPL code for this site: git clone https://public-inbox.org/ public-inbox