Commit 872e79ad authored by Denis Ciocca's avatar Denis Ciocca Committed by Jonathan Cameron
Browse files

iio:magnetometer: Add STMicroelectronics magnetometers driver



This patch adds a generic magnetometer driver for STMicroelectronics
magnetometers, currently it supports:
LSM303DLHC, LSM303DLM, LIS3MDL.
Signed-off-by: default avatarDenis Ciocca <denis.ciocca@st.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 7be56a8f
......@@ -14,4 +14,34 @@ config HID_SENSOR_MAGNETOMETER_3D
Say yes here to build support for the HID SENSOR
Magnetometer 3D.
config IIO_ST_MAGN_3AXIS
tristate "STMicroelectronics magnetometers 3-Axis Driver"
depends on (I2C || SPI_MASTER) && SYSFS
select IIO_ST_SENSORS_CORE
select IIO_ST_MAGN_I2C_3AXIS if (I2C)
select IIO_ST_MAGN_SPI_3AXIS if (SPI_MASTER)
select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
select IIO_ST_MAGN_BUFFER if (IIO_TRIGGERED_BUFFER)
help
Say yes here to build support for STMicroelectronics magnetometers:
LSM303DLHC, LSM303DLM, LIS3MDL.
This driver can also be built as a module. If so, will be created
these modules:
- st_magn (core functions for the driver [it is mandatory]);
- st_magn_i2c (necessary for the I2C devices [optional*]);
- st_magn_spi (necessary for the SPI devices [optional*]);
(*) one of these is necessary to do something.
config IIO_ST_MAGN_I2C_3AXIS
tristate
depends on IIO_ST_MAGN_3AXIS
depends on IIO_ST_SENSORS_I2C
config IIO_ST_MAGN_SPI_3AXIS
tristate
depends on IIO_ST_MAGN_3AXIS
depends on IIO_ST_SENSORS_SPI
endmenu
......@@ -3,3 +3,10 @@
#
obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o
obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn.o
st_magn-y := st_magn_core.o
st_magn-$(CONFIG_IIO_BUFFER) += st_magn_buffer.o
obj-$(CONFIG_IIO_ST_MAGN_I2C_3AXIS) += st_magn_i2c.o
obj-$(CONFIG_IIO_ST_MAGN_SPI_3AXIS) += st_magn_spi.o
/*
* STMicroelectronics magnetometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
* v. 1.0.0
* Licensed under the GPL-2.
*/
#ifndef ST_MAGN_H
#define ST_MAGN_H
#include <linux/types.h>
#include <linux/iio/common/st_sensors.h>
#define LSM303DLHC_MAGN_DEV_NAME "lsm303dlhc_magn"
#define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn"
#define LIS3MDL_MAGN_DEV_NAME "lis3mdl"
int st_magn_common_probe(struct iio_dev *indio_dev);
void st_magn_common_remove(struct iio_dev *indio_dev);
#ifdef CONFIG_IIO_BUFFER
int st_magn_allocate_ring(struct iio_dev *indio_dev);
void st_magn_deallocate_ring(struct iio_dev *indio_dev);
#else /* CONFIG_IIO_BUFFER */
static inline int st_magn_probe_trigger(struct iio_dev *indio_dev, int irq)
{
return 0;
}
static inline void st_magn_remove_trigger(struct iio_dev *indio_dev, int irq)
{
return;
}
static inline int st_magn_allocate_ring(struct iio_dev *indio_dev)
{
return 0;
}
static inline void st_magn_deallocate_ring(struct iio_dev *indio_dev)
{
}
#endif /* CONFIG_IIO_BUFFER */
#endif /* ST_MAGN_H */
/*
* STMicroelectronics magnetometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_magn.h"
static int st_magn_buffer_preenable(struct iio_dev *indio_dev)
{
int err;
err = st_sensors_set_enable(indio_dev, true);
if (err < 0)
goto st_magn_set_enable_error;
err = iio_sw_buffer_preenable(indio_dev);
st_magn_set_enable_error:
return err;
}
static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *mdata = iio_priv(indio_dev);
mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (mdata->buffer_data == NULL) {
err = -ENOMEM;
goto allocate_memory_error;
}
err = iio_triggered_buffer_postenable(indio_dev);
if (err < 0)
goto st_magn_buffer_postenable_error;
return err;
st_magn_buffer_postenable_error:
kfree(mdata->buffer_data);
allocate_memory_error:
return err;
}
static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *mdata = iio_priv(indio_dev);
err = iio_triggered_buffer_predisable(indio_dev);
if (err < 0)
goto st_magn_buffer_predisable_error;
err = st_sensors_set_enable(indio_dev, false);
st_magn_buffer_predisable_error:
kfree(mdata->buffer_data);
return err;
}
static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
.preenable = &st_magn_buffer_preenable,
.postenable = &st_magn_buffer_postenable,
.predisable = &st_magn_buffer_predisable,
};
int st_magn_allocate_ring(struct iio_dev *indio_dev)
{
return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
&st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
}
void st_magn_deallocate_ring(struct iio_dev *indio_dev)
{
iio_triggered_buffer_cleanup(indio_dev);
}
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
MODULE_LICENSE("GPL v2");
/*
* STMicroelectronics magnetometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*
* Licensed under the GPL-2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_magn.h"
/* DEFAULT VALUE FOR SENSORS */
#define ST_MAGN_DEFAULT_OUT_X_L_ADDR 0X04
#define ST_MAGN_DEFAULT_OUT_Y_L_ADDR 0X08
#define ST_MAGN_DEFAULT_OUT_Z_L_ADDR 0X06
/* FULLSCALE */
#define ST_MAGN_FS_AVL_1300MG 1300
#define ST_MAGN_FS_AVL_1900MG 1900
#define ST_MAGN_FS_AVL_2500MG 2500
#define ST_MAGN_FS_AVL_4000MG 4000
#define ST_MAGN_FS_AVL_4700MG 4700
#define ST_MAGN_FS_AVL_5600MG 5600
#define ST_MAGN_FS_AVL_8000MG 8000
#define ST_MAGN_FS_AVL_8100MG 8100
#define ST_MAGN_FS_AVL_10000MG 10000
/* CUSTOM VALUES FOR SENSOR 1 */
#define ST_MAGN_1_WAI_EXP 0x3c
#define ST_MAGN_1_ODR_ADDR 0x00
#define ST_MAGN_1_ODR_MASK 0x1c
#define ST_MAGN_1_ODR_AVL_1HZ_VAL 0x00
#define ST_MAGN_1_ODR_AVL_2HZ_VAL 0x01
#define ST_MAGN_1_ODR_AVL_3HZ_VAL 0x02
#define ST_MAGN_1_ODR_AVL_8HZ_VAL 0x03
#define ST_MAGN_1_ODR_AVL_15HZ_VAL 0x04
#define ST_MAGN_1_ODR_AVL_30HZ_VAL 0x05
#define ST_MAGN_1_ODR_AVL_75HZ_VAL 0x06
#define ST_MAGN_1_ODR_AVL_220HZ_VAL 0x07
#define ST_MAGN_1_PW_ADDR 0x02
#define ST_MAGN_1_PW_MASK 0x03
#define ST_MAGN_1_PW_ON 0x00
#define ST_MAGN_1_PW_OFF 0x03
#define ST_MAGN_1_FS_ADDR 0x01
#define ST_MAGN_1_FS_MASK 0xe0
#define ST_MAGN_1_FS_AVL_1300_VAL 0x01
#define ST_MAGN_1_FS_AVL_1900_VAL 0x02
#define ST_MAGN_1_FS_AVL_2500_VAL 0x03
#define ST_MAGN_1_FS_AVL_4000_VAL 0x04
#define ST_MAGN_1_FS_AVL_4700_VAL 0x05
#define ST_MAGN_1_FS_AVL_5600_VAL 0x06
#define ST_MAGN_1_FS_AVL_8100_VAL 0x07
#define ST_MAGN_1_FS_AVL_1300_GAIN_XY 1100
#define ST_MAGN_1_FS_AVL_1900_GAIN_XY 855
#define ST_MAGN_1_FS_AVL_2500_GAIN_XY 670
#define ST_MAGN_1_FS_AVL_4000_GAIN_XY 450
#define ST_MAGN_1_FS_AVL_4700_GAIN_XY 400
#define ST_MAGN_1_FS_AVL_5600_GAIN_XY 330
#define ST_MAGN_1_FS_AVL_8100_GAIN_XY 230
#define ST_MAGN_1_FS_AVL_1300_GAIN_Z 980
#define ST_MAGN_1_FS_AVL_1900_GAIN_Z 760
#define ST_MAGN_1_FS_AVL_2500_GAIN_Z 600
#define ST_MAGN_1_FS_AVL_4000_GAIN_Z 400
#define ST_MAGN_1_FS_AVL_4700_GAIN_Z 355
#define ST_MAGN_1_FS_AVL_5600_GAIN_Z 295
#define ST_MAGN_1_FS_AVL_8100_GAIN_Z 205
#define ST_MAGN_1_MULTIREAD_BIT false
/* CUSTOM VALUES FOR SENSOR 2 */
#define ST_MAGN_2_WAI_EXP 0x3d
#define ST_MAGN_2_ODR_ADDR 0x20
#define ST_MAGN_2_ODR_MASK 0x1c
#define ST_MAGN_2_ODR_AVL_1HZ_VAL 0x00
#define ST_MAGN_2_ODR_AVL_2HZ_VAL 0x01
#define ST_MAGN_2_ODR_AVL_3HZ_VAL 0x02
#define ST_MAGN_2_ODR_AVL_5HZ_VAL 0x03
#define ST_MAGN_2_ODR_AVL_10HZ_VAL 0x04
#define ST_MAGN_2_ODR_AVL_20HZ_VAL 0x05
#define ST_MAGN_2_ODR_AVL_40HZ_VAL 0x06
#define ST_MAGN_2_ODR_AVL_80HZ_VAL 0x07
#define ST_MAGN_2_PW_ADDR 0x22
#define ST_MAGN_2_PW_MASK 0x03
#define ST_MAGN_2_PW_ON 0x00
#define ST_MAGN_2_PW_OFF 0x03
#define ST_MAGN_2_FS_ADDR 0x21
#define ST_MAGN_2_FS_MASK 0x60
#define ST_MAGN_2_FS_AVL_4000_VAL 0x00
#define ST_MAGN_2_FS_AVL_8000_VAL 0x01
#define ST_MAGN_2_FS_AVL_10000_VAL 0x02
#define ST_MAGN_2_FS_AVL_4000_GAIN 430
#define ST_MAGN_2_FS_AVL_8000_GAIN 230
#define ST_MAGN_2_FS_AVL_10000_GAIN 230
#define ST_MAGN_2_MULTIREAD_BIT false
#define ST_MAGN_2_OUT_X_L_ADDR 0x28
#define ST_MAGN_2_OUT_Y_L_ADDR 0x2a
#define ST_MAGN_2_OUT_Z_L_ADDR 0x2c
static const struct iio_chan_spec st_magn_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct st_sensors st_magn_sensors[] = {
{
.wai = ST_MAGN_1_WAI_EXP,
.sensors_supported = {
[0] = LSM303DLHC_MAGN_DEV_NAME,
[1] = LSM303DLM_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_16bit_channels,
.odr = {
.addr = ST_MAGN_1_ODR_ADDR,
.mask = ST_MAGN_1_ODR_MASK,
.odr_avl = {
{ 1, ST_MAGN_1_ODR_AVL_1HZ_VAL, },
{ 2, ST_MAGN_1_ODR_AVL_2HZ_VAL, },
{ 3, ST_MAGN_1_ODR_AVL_3HZ_VAL, },
{ 8, ST_MAGN_1_ODR_AVL_8HZ_VAL, },
{ 15, ST_MAGN_1_ODR_AVL_15HZ_VAL, },
{ 30, ST_MAGN_1_ODR_AVL_30HZ_VAL, },
{ 75, ST_MAGN_1_ODR_AVL_75HZ_VAL, },
{ 220, ST_MAGN_1_ODR_AVL_220HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_1_PW_ADDR,
.mask = ST_MAGN_1_PW_MASK,
.value_on = ST_MAGN_1_PW_ON,
.value_off = ST_MAGN_1_PW_OFF,
},
.fs = {
.addr = ST_MAGN_1_FS_ADDR,
.mask = ST_MAGN_1_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_1300MG,
.value = ST_MAGN_1_FS_AVL_1300_VAL,
.gain = ST_MAGN_1_FS_AVL_1300_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_1300_GAIN_Z,
},
[1] = {
.num = ST_MAGN_FS_AVL_1900MG,
.value = ST_MAGN_1_FS_AVL_1900_VAL,
.gain = ST_MAGN_1_FS_AVL_1900_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_1900_GAIN_Z,
},
[2] = {
.num = ST_MAGN_FS_AVL_2500MG,
.value = ST_MAGN_1_FS_AVL_2500_VAL,
.gain = ST_MAGN_1_FS_AVL_2500_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_2500_GAIN_Z,
},
[3] = {
.num = ST_MAGN_FS_AVL_4000MG,
.value = ST_MAGN_1_FS_AVL_4000_VAL,
.gain = ST_MAGN_1_FS_AVL_4000_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_4000_GAIN_Z,
},
[4] = {
.num = ST_MAGN_FS_AVL_4700MG,
.value = ST_MAGN_1_FS_AVL_4700_VAL,
.gain = ST_MAGN_1_FS_AVL_4700_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_4700_GAIN_Z,
},
[5] = {
.num = ST_MAGN_FS_AVL_5600MG,
.value = ST_MAGN_1_FS_AVL_5600_VAL,
.gain = ST_MAGN_1_FS_AVL_5600_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_5600_GAIN_Z,
},
[6] = {
.num = ST_MAGN_FS_AVL_8100MG,
.value = ST_MAGN_1_FS_AVL_8100_VAL,
.gain = ST_MAGN_1_FS_AVL_8100_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_8100_GAIN_Z,
},
},
},
.multi_read_bit = ST_MAGN_1_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_MAGN_2_WAI_EXP,
.sensors_supported = {
[0] = LIS3MDL_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_2_16bit_channels,
.odr = {
.addr = ST_MAGN_2_ODR_ADDR,
.mask = ST_MAGN_2_ODR_MASK,
.odr_avl = {
{ 1, ST_MAGN_2_ODR_AVL_1HZ_VAL, },
{ 2, ST_MAGN_2_ODR_AVL_2HZ_VAL, },
{ 3, ST_MAGN_2_ODR_AVL_3HZ_VAL, },
{ 5, ST_MAGN_2_ODR_AVL_5HZ_VAL, },
{ 10, ST_MAGN_2_ODR_AVL_10HZ_VAL, },
{ 20, ST_MAGN_2_ODR_AVL_20HZ_VAL, },
{ 40, ST_MAGN_2_ODR_AVL_40HZ_VAL, },
{ 80, ST_MAGN_2_ODR_AVL_80HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_2_PW_ADDR,
.mask = ST_MAGN_2_PW_MASK,
.value_on = ST_MAGN_2_PW_ON,
.value_off = ST_MAGN_2_PW_OFF,
},
.fs = {
.addr = ST_MAGN_2_FS_ADDR,
.mask = ST_MAGN_2_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_4000MG,
.value = ST_MAGN_2_FS_AVL_4000_VAL,
.gain = ST_MAGN_2_FS_AVL_4000_GAIN,
},
[1] = {
.num = ST_MAGN_FS_AVL_8000MG,
.value = ST_MAGN_2_FS_AVL_8000_VAL,
.gain = ST_MAGN_2_FS_AVL_8000_GAIN,
},
[2] = {
.num = ST_MAGN_FS_AVL_10000MG,
.value = ST_MAGN_2_FS_AVL_10000_VAL,
.gain = ST_MAGN_2_FS_AVL_10000_GAIN,
},
},
},
.multi_read_bit = ST_MAGN_2_MULTIREAD_BIT,
.bootime = 2,
},
};
static int st_magn_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *ch, int *val,
int *val2, long mask)
{
int err;
struct st_sensor_data *mdata = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_RAW:
err = st_sensors_read_info_raw(indio_dev, ch, val);
if (err < 0)
goto read_error;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
*val = 0;
if ((ch->scan_index == ST_SENSORS_SCAN_Z) &&
(mdata->current_fullscale->gain2 != 0))
*val2 = mdata->current_fullscale->gain2;
else
*val2 = mdata->current_fullscale->gain;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
read_error:
return err;
}
static int st_magn_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val, int val2, long mask)
{
int err;
switch (mask) {
case IIO_CHAN_INFO_SCALE:
err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
break;
default:
err = -EINVAL;
}
return err;
}
static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available);
static struct attribute *st_magn_attributes[] = {
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_in_magn_scale_available.dev_attr.attr,
&iio_dev_attr_sampling_frequency.dev_attr.attr,
NULL,
};
static const struct attribute_group st_magn_attribute_group = {
.attrs = st_magn_attributes,
};
static const struct iio_info magn_info = {
.driver_module = THIS_MODULE,
.attrs = &st_magn_attribute_group,
.read_raw = &st_magn_read_raw,
.write_raw = &st_magn_write_raw,
};
int st_magn_common_probe(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *mdata = iio_priv(indio_dev);
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &magn_info;
err = st_sensors_check_device_support(indio_dev,
ARRAY_SIZE(st_magn_sensors), st_magn_sensors);
if (err < 0)
goto st_magn_common_probe_error;
mdata->multiread_bit = mdata->sensor->multi_read_bit;
indio_dev->channels = mdata->sensor->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
mdata->current_fullscale = (struct st_sensor_fullscale_avl *)
&mdata->sensor->fs.fs_avl[0];
mdata->odr = mdata->sensor->odr.odr_avl[0].hz;
err = st_sensors_init_sensor(indio_dev);
if (err < 0)
goto st_magn_common_probe_error;
if (mdata->get_irq_data_ready(indio_dev) > 0) {
err = st_magn_allocate_ring(indio_dev);
if (err < 0)
goto st_magn_common_probe_error;
err = st_sensors_allocate_trigger(indio_dev, NULL);
if (err < 0)
goto st_magn_probe_trigger_error;
}
err = iio_device_register(indio_dev);
if (err)
goto st_magn_device_register_error;
return err;
st_magn_device_register_error:
if (mdata->get_irq_data_ready(indio_dev) > 0)
st_sensors_deallocate_trigger(indio_dev);
st_magn_probe_trigger_error:
if (mdata->get_irq_data_ready(indio_dev) > 0)
st_magn_deallocate_ring(indio_dev);
st_magn_common_probe_error:
return err;
}
EXPORT_SYMBOL(st_magn_common_probe);
void st_magn_common_remove(struct iio_dev *indio_dev)
{
struct st_sensor_data *mdata = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
if (mdata->get_irq_data_ready(indio_dev) > 0) {
st_sensors_deallocate_trigger(indio_dev);
st_magn_deallocate_ring(indio_dev);
}
iio_device_free(indio_dev);
}
EXPORT_SYMBOL(st_magn_common_remove);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics magnetometers driver");
MODULE_LICENSE("GPL v2");
/*
* STMicroelectronics magnetometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*
* Licensed under the GPL-2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_magn.h"
static int st_magn_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct iio_dev *indio_dev;
struct st_sensor_data *mdata;
int err;