Commit 7be56a8f authored by Denis Ciocca's avatar Denis Ciocca Committed by Jonathan Cameron

iio:gyro: Add STMicroelectronics gyroscopes driver

This patch adds a generic gyroscope driver for STMicroelectronics
gyroscopes, currently it supports:
L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.
Signed-off-by: default avatarDenis Ciocca <denis.ciocca@st.com>
Reviewed-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent d6251168
...@@ -30,4 +30,34 @@ config HID_SENSOR_GYRO_3D ...@@ -30,4 +30,34 @@ config HID_SENSOR_GYRO_3D
Say yes here to build support for the HID SENSOR Say yes here to build support for the HID SENSOR
Gyroscope 3D. Gyroscope 3D.
config IIO_ST_GYRO_3AXIS
tristate "STMicroelectronics gyroscopes 3-Axis Driver"
depends on (I2C || SPI_MASTER) && SYSFS
select IIO_ST_SENSORS_CORE
select IIO_ST_GYRO_I2C_3AXIS if (I2C)
select IIO_ST_GYRO_SPI_3AXIS if (SPI_MASTER)
select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
select IIO_ST_GYRO_BUFFER if (IIO_TRIGGERED_BUFFER)
help
Say yes here to build support for STMicroelectronics gyroscopes:
L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.
This driver can also be built as a module. If so, will be created
these modules:
- st_gyro (core functions for the driver [it is mandatory]);
- st_gyro_i2c (necessary for the I2C devices [optional*]);
- st_gyro_spi (necessary for the SPI devices [optional*]);
(*) one of these is necessary to do something.
config IIO_ST_GYRO_I2C_3AXIS
tristate
depends on IIO_ST_GYRO_3AXIS
depends on IIO_ST_SENSORS_I2C
config IIO_ST_GYRO_SPI_3AXIS
tristate
depends on IIO_ST_GYRO_3AXIS
depends on IIO_ST_SENSORS_SPI
endmenu endmenu
...@@ -5,3 +5,10 @@ ...@@ -5,3 +5,10 @@
obj-$(CONFIG_ADIS16080) += adis16080.o obj-$(CONFIG_ADIS16080) += adis16080.o
obj-$(CONFIG_ADIS16136) += adis16136.o obj-$(CONFIG_ADIS16136) += adis16136.o
obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o
st_gyro-y := st_gyro_core.o
st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o
obj-$(CONFIG_IIO_ST_GYRO_I2C_3AXIS) += st_gyro_i2c.o
obj-$(CONFIG_IIO_ST_GYRO_SPI_3AXIS) += st_gyro_spi.o
/*
* STMicroelectronics gyroscopes driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
* v. 1.0.0
* Licensed under the GPL-2.
*/
#ifndef ST_GYRO_H
#define ST_GYRO_H
#include <linux/types.h>
#include <linux/iio/common/st_sensors.h>
#define L3G4200D_GYRO_DEV_NAME "l3g4200d"
#define LSM330D_GYRO_DEV_NAME "lsm330d_gyro"
#define LSM330DL_GYRO_DEV_NAME "lsm330dl_gyro"
#define LSM330DLC_GYRO_DEV_NAME "lsm330dlc_gyro"
#define L3GD20_GYRO_DEV_NAME "l3gd20"
#define L3GD20H_GYRO_DEV_NAME "l3gd20h"
#define L3G4IS_GYRO_DEV_NAME "l3g4is_ui"
#define LSM330_GYRO_DEV_NAME "lsm330_gyro"
int st_gyro_common_probe(struct iio_dev *indio_dev);
void st_gyro_common_remove(struct iio_dev *indio_dev);
#ifdef CONFIG_IIO_BUFFER
int st_gyro_allocate_ring(struct iio_dev *indio_dev);
void st_gyro_deallocate_ring(struct iio_dev *indio_dev);
int st_gyro_trig_set_state(struct iio_trigger *trig, bool state);
#define ST_GYRO_TRIGGER_SET_STATE (&st_gyro_trig_set_state)
#else /* CONFIG_IIO_BUFFER */
static inline int st_gyro_allocate_ring(struct iio_dev *indio_dev)
{
return 0;
}
static inline void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
{
}
#define ST_GYRO_TRIGGER_SET_STATE NULL
#endif /* CONFIG_IIO_BUFFER */
#endif /* ST_GYRO_H */
/*
* STMicroelectronics gyroscopes 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_gyro.h"
int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
{
struct iio_dev *indio_dev = trig->private_data;
return st_sensors_set_dataready_irq(indio_dev, state);
}
static int st_gyro_buffer_preenable(struct iio_dev *indio_dev)
{
int err;
err = st_sensors_set_enable(indio_dev, true);
if (err < 0)
goto st_gyro_set_enable_error;
err = iio_sw_buffer_preenable(indio_dev);
st_gyro_set_enable_error:
return err;
}
static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *gdata = iio_priv(indio_dev);
gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (gdata->buffer_data == NULL) {
err = -ENOMEM;
goto allocate_memory_error;
}
err = st_sensors_set_axis_enable(indio_dev,
(u8)indio_dev->active_scan_mask[0]);
if (err < 0)
goto st_gyro_buffer_postenable_error;
err = iio_triggered_buffer_postenable(indio_dev);
if (err < 0)
goto st_gyro_buffer_postenable_error;
return err;
st_gyro_buffer_postenable_error:
kfree(gdata->buffer_data);
allocate_memory_error:
return err;
}
static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *gdata = iio_priv(indio_dev);
err = iio_triggered_buffer_predisable(indio_dev);
if (err < 0)
goto st_gyro_buffer_predisable_error;
err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
if (err < 0)
goto st_gyro_buffer_predisable_error;
err = st_sensors_set_enable(indio_dev, false);
st_gyro_buffer_predisable_error:
kfree(gdata->buffer_data);
return err;
}
static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
.preenable = &st_gyro_buffer_preenable,
.postenable = &st_gyro_buffer_postenable,
.predisable = &st_gyro_buffer_predisable,
};
int st_gyro_allocate_ring(struct iio_dev *indio_dev)
{
return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
&st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
}
void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
{
iio_triggered_buffer_cleanup(indio_dev);
}
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
MODULE_LICENSE("GPL v2");
This diff is collapsed.
/*
* STMicroelectronics gyroscopes 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_gyro.h"
static int st_gyro_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct iio_dev *indio_dev;
struct st_sensor_data *gdata;
int err;
indio_dev = iio_device_alloc(sizeof(*gdata));
if (indio_dev == NULL) {
err = -ENOMEM;
goto iio_device_alloc_error;
}
gdata = iio_priv(indio_dev);
gdata->dev = &client->dev;
st_sensors_i2c_configure(indio_dev, client, gdata);
err = st_gyro_common_probe(indio_dev);
if (err < 0)
goto st_gyro_common_probe_error;
return 0;
st_gyro_common_probe_error:
iio_device_free(indio_dev);
iio_device_alloc_error:
return err;
}
static int st_gyro_i2c_remove(struct i2c_client *client)
{
st_gyro_common_remove(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id st_gyro_id_table[] = {
{ L3G4200D_GYRO_DEV_NAME },
{ LSM330D_GYRO_DEV_NAME },
{ LSM330DL_GYRO_DEV_NAME },
{ LSM330DLC_GYRO_DEV_NAME },
{ L3GD20_GYRO_DEV_NAME },
{ L3GD20H_GYRO_DEV_NAME },
{ L3G4IS_GYRO_DEV_NAME },
{ LSM330_GYRO_DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(i2c, st_gyro_id_table);
static struct i2c_driver st_gyro_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-gyro-i2c",
},
.probe = st_gyro_i2c_probe,
.remove = st_gyro_i2c_remove,
.id_table = st_gyro_id_table,
};
module_i2c_driver(st_gyro_driver);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics gyroscopes i2c driver");
MODULE_LICENSE("GPL v2");
/*
* STMicroelectronics gyroscopes 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/spi/spi.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_spi.h>
#include "st_gyro.h"
static int st_gyro_spi_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
struct st_sensor_data *gdata;
int err;
indio_dev = iio_device_alloc(sizeof(*gdata));
if (indio_dev == NULL) {
err = -ENOMEM;
goto iio_device_alloc_error;
}
gdata = iio_priv(indio_dev);
gdata->dev = &spi->dev;
st_sensors_spi_configure(indio_dev, spi, gdata);
err = st_gyro_common_probe(indio_dev);
if (err < 0)
goto st_gyro_common_probe_error;
return 0;
st_gyro_common_probe_error:
iio_device_free(indio_dev);
iio_device_alloc_error:
return err;
}
static int st_gyro_spi_remove(struct spi_device *spi)
{
st_gyro_common_remove(spi_get_drvdata(spi));
return 0;
}
static const struct spi_device_id st_gyro_id_table[] = {
{ L3G4200D_GYRO_DEV_NAME },
{ LSM330D_GYRO_DEV_NAME },
{ LSM330DL_GYRO_DEV_NAME },
{ LSM330DLC_GYRO_DEV_NAME },
{ L3GD20_GYRO_DEV_NAME },
{ L3GD20H_GYRO_DEV_NAME },
{ L3G4IS_GYRO_DEV_NAME },
{ LSM330_GYRO_DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(spi, st_gyro_id_table);
static struct spi_driver st_gyro_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-gyro-spi",
},
.probe = st_gyro_spi_probe,
.remove = st_gyro_spi_remove,
.id_table = st_gyro_id_table,
};
module_spi_driver(st_gyro_driver);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
MODULE_LICENSE("GPL v2");
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