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iio: st_sensors: remove st_sensors_power_disable() function

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This change converts the st_sensors_power_enable() function to use
devm_add_action_or_reset() handlers to register regulator_disable hooks for
when the drivers get unloaded.

The parent device of the IIO device object is used. This is based on the
assumption that all other devm_ calls in the ST sensors use this reference.

This makes the st_sensors_power_disable() un-needed.
Removing this also changes unload order a bit, as all ST drivers would call
st_sensors_power_disable() first and iio_device_unregister() after that.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210823112204.243255-4-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2021-08-23 14:22:02 +03:00 committed by Jonathan Cameron
parent 82bcb7fb64
commit 5363c6c17b
10 changed files with 23 additions and 117 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/iio/accel/st_accel_i2c.c
View File

@ -177,16 +177,7 @@ static int st_accel_i2c_probe(struct i2c_client *client)
if (ret)
return ret;
ret = st_accel_common_probe(indio_dev);
if (ret < 0)
goto st_accel_power_off;
return 0;
st_accel_power_off:
st_sensors_power_disable(indio_dev);
return ret;
return st_accel_common_probe(indio_dev);
}
static int st_accel_i2c_remove(struct i2c_client *client)
@ -195,8 +186,6 @@ static int st_accel_i2c_remove(struct i2c_client *client)
st_accel_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/accel/st_accel_spi.c
View File

@ -127,16 +127,7 @@ static int st_accel_spi_probe(struct spi_device *spi)
if (err)
return err;
err = st_accel_common_probe(indio_dev);
if (err < 0)
goto st_accel_power_off;
return 0;
st_accel_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_accel_common_probe(indio_dev);
}
static int st_accel_spi_remove(struct spi_device *spi)
@ -145,8 +136,6 @@ static int st_accel_spi_remove(struct spi_device *spi)
st_accel_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

34
drivers/iio/common/st_sensors/st_sensors_core.c
View File

@ -215,13 +215,19 @@ int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable)
}
EXPORT_SYMBOL(st_sensors_set_axis_enable);
static void st_reg_disable(void *reg)
{
regulator_disable(reg);
}
int st_sensors_power_enable(struct iio_dev *indio_dev)
{
struct st_sensor_data *pdata = iio_priv(indio_dev);
struct device *parent = indio_dev->dev.parent;
int err;
/* Regulators not mandatory, but if requested we should enable them. */
pdata->vdd = devm_regulator_get(indio_dev->dev.parent, "vdd");
pdata->vdd = devm_regulator_get(parent, "vdd");
if (IS_ERR(pdata->vdd)) {
dev_err(&indio_dev->dev, "unable to get Vdd supply\n");
return PTR_ERR(pdata->vdd);
@ -233,36 +239,26 @@ int st_sensors_power_enable(struct iio_dev *indio_dev)
return err;
}
pdata->vdd_io = devm_regulator_get(indio_dev->dev.parent, "vddio");
err = devm_add_action_or_reset(parent, st_reg_disable, pdata->vdd);
if (err)
return err;
pdata->vdd_io = devm_regulator_get(parent, "vddio");
if (IS_ERR(pdata->vdd_io)) {
dev_err(&indio_dev->dev, "unable to get Vdd_IO supply\n");
err = PTR_ERR(pdata->vdd_io);
goto st_sensors_disable_vdd;
return PTR_ERR(pdata->vdd_io);
}
err = regulator_enable(pdata->vdd_io);
if (err != 0) {
dev_warn(&indio_dev->dev,
"Failed to enable specified Vdd_IO supply\n");
goto st_sensors_disable_vdd;
return err;
}
return 0;
st_sensors_disable_vdd:
regulator_disable(pdata->vdd);
return err;
return devm_add_action_or_reset(parent, st_reg_disable, pdata->vdd_io);
}
EXPORT_SYMBOL(st_sensors_power_enable);
void st_sensors_power_disable(struct iio_dev *indio_dev)
{
struct st_sensor_data *pdata = iio_priv(indio_dev);
regulator_disable(pdata->vdd);
regulator_disable(pdata->vdd_io);
}
EXPORT_SYMBOL(st_sensors_power_disable);
static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev,
struct st_sensors_platform_data *pdata)
{

13
drivers/iio/gyro/st_gyro_i2c.c
View File

@ -90,16 +90,7 @@ static int st_gyro_i2c_probe(struct i2c_client *client,
if (err)
return err;
err = st_gyro_common_probe(indio_dev);
if (err < 0)
goto st_gyro_power_off;
return 0;
st_gyro_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_gyro_common_probe(indio_dev);
}
static int st_gyro_i2c_remove(struct i2c_client *client)
@ -108,8 +99,6 @@ static int st_gyro_i2c_remove(struct i2c_client *client)
st_gyro_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/gyro/st_gyro_spi.c
View File

@ -94,16 +94,7 @@ static int st_gyro_spi_probe(struct spi_device *spi)
if (err)
return err;
err = st_gyro_common_probe(indio_dev);
if (err < 0)
goto st_gyro_power_off;
return 0;
st_gyro_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_gyro_common_probe(indio_dev);
}
static int st_gyro_spi_remove(struct spi_device *spi)
@ -112,8 +103,6 @@ static int st_gyro_spi_remove(struct spi_device *spi)
st_gyro_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/magnetometer/st_magn_i2c.c
View File

@ -86,16 +86,7 @@ static int st_magn_i2c_probe(struct i2c_client *client,
if (err)
return err;
err = st_magn_common_probe(indio_dev);
if (err < 0)
goto st_magn_power_off;
return 0;
st_magn_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_magn_common_probe(indio_dev);
}
static int st_magn_i2c_remove(struct i2c_client *client)
@ -104,8 +95,6 @@ static int st_magn_i2c_remove(struct i2c_client *client)
st_magn_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/magnetometer/st_magn_spi.c
View File

@ -80,16 +80,7 @@ static int st_magn_spi_probe(struct spi_device *spi)
if (err)
return err;
err = st_magn_common_probe(indio_dev);
if (err < 0)
goto st_magn_power_off;
return 0;
st_magn_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_magn_common_probe(indio_dev);
}
static int st_magn_spi_remove(struct spi_device *spi)
@ -98,8 +89,6 @@ static int st_magn_spi_remove(struct spi_device *spi)
st_magn_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/pressure/st_pressure_i2c.c
View File

@ -103,16 +103,7 @@ static int st_press_i2c_probe(struct i2c_client *client,
if (ret)
return ret;
ret = st_press_common_probe(indio_dev);
if (ret < 0)
goto st_press_power_off;
return 0;
st_press_power_off:
st_sensors_power_disable(indio_dev);
return ret;
return st_press_common_probe(indio_dev);
}
static int st_press_i2c_remove(struct i2c_client *client)
@ -121,8 +112,6 @@ static int st_press_i2c_remove(struct i2c_client *client)
st_press_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

13
drivers/iio/pressure/st_pressure_spi.c
View File

@ -86,16 +86,7 @@ static int st_press_spi_probe(struct spi_device *spi)
if (err)
return err;
err = st_press_common_probe(indio_dev);
if (err < 0)
goto st_press_power_off;
return 0;
st_press_power_off:
st_sensors_power_disable(indio_dev);
return err;
return st_press_common_probe(indio_dev);
}
static int st_press_spi_remove(struct spi_device *spi)
@ -104,8 +95,6 @@ static int st_press_spi_remove(struct spi_device *spi)
st_press_common_remove(indio_dev);
st_sensors_power_disable(indio_dev);
return 0;
}

2
include/linux/iio/common/st_sensors.h
View File

@ -293,8 +293,6 @@ int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable);
int st_sensors_power_enable(struct iio_dev *indio_dev);
void st_sensors_power_disable(struct iio_dev *indio_dev);
int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev,
unsigned reg, unsigned writeval,
unsigned *readval);