On 06/03/2013 03:58 PM, Denis CIOCCA wrote:
> This patch adds a generic pressure driver for STMicroelectronics
> pressure sensors, currently it supports: LPS331AP.
>
> Signed-off-by: Denis Ciocca <denis.ciocca@xxxxxx>
Applied to the togreg branch of iio.git.
Thanks,
> ---
> drivers/iio/Kconfig | 1 +
> drivers/iio/Makefile | 1 +
> drivers/iio/pressure/Kconfig | 35 ++++
> drivers/iio/pressure/Makefile | 10 ++
> drivers/iio/pressure/st_pressure.h | 39 +++++
> drivers/iio/pressure/st_pressure_buffer.c | 105 +++++++++++
> drivers/iio/pressure/st_pressure_core.c | 272 +++++++++++++++++++++++++++++
> drivers/iio/pressure/st_pressure_i2c.c | 77 ++++++++
> drivers/iio/pressure/st_pressure_spi.c | 76 ++++++++
> 9 files changed, 616 insertions(+)
> create mode 100644 drivers/iio/pressure/Kconfig
> create mode 100644 drivers/iio/pressure/Makefile
> create mode 100644 drivers/iio/pressure/st_pressure.h
> create mode 100644 drivers/iio/pressure/st_pressure_buffer.c
> create mode 100644 drivers/iio/pressure/st_pressure_core.c
> create mode 100644 drivers/iio/pressure/st_pressure_i2c.c
> create mode 100644 drivers/iio/pressure/st_pressure_spi.c
>
> diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
> index daa3ddd..9af763a 100644
> --- a/drivers/iio/Kconfig
> +++ b/drivers/iio/Kconfig
> @@ -73,5 +73,6 @@ source "drivers/iio/magnetometer/Kconfig"
> if IIO_TRIGGER
> source "drivers/iio/trigger/Kconfig"
> endif #IIO_TRIGGER
> +source "drivers/iio/pressure/Kconfig"
>
> endif # IIO
> diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
> index a349a96..7a3866c 100644
> --- a/drivers/iio/Makefile
> +++ b/drivers/iio/Makefile
> @@ -22,3 +22,4 @@ obj-y += imu/
> obj-y += light/
> obj-y += magnetometer/
> obj-y += trigger/
> +obj-y += pressure/
> diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
> new file mode 100644
> index 0000000..9427f01
> --- /dev/null
> +++ b/drivers/iio/pressure/Kconfig
> @@ -0,0 +1,35 @@
> +#
> +# Pressure drivers
> +#
> +menu "Pressure Sensors"
> +
> +config IIO_ST_PRESS
> + tristate "STMicroelectronics pressures Driver"
> + depends on (I2C || SPI_MASTER) && SYSFS
> + select IIO_ST_SENSORS_CORE
> + select IIO_ST_PRESS_I2C if (I2C)
> + select IIO_ST_PRESS_SPI if (SPI_MASTER)
> + select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
> + help
> + Say yes here to build support for STMicroelectronics pressures:
> + LPS331AP.
> +
> + This driver can also be built as a module. If so, will be created
> + these modules:
> + - st_pressure (core functions for the driver [it is mandatory]);
> + - st_pressure_i2c (necessary for the I2C devices [optional*]);
> + - st_pressure_spi (necessary for the SPI devices [optional*]);
> +
> + (*) one of these is necessary to do something.
> +
> +config IIO_ST_PRESS_I2C
> + tristate
> + depends on IIO_ST_PRESS
> + depends on IIO_ST_SENSORS_I2C
> +
> +config IIO_ST_PRESS_SPI
> + tristate
> + depends on IIO_ST_PRESS
> + depends on IIO_ST_SENSORS_SPI
> +
> +endmenu
> diff --git a/drivers/iio/pressure/Makefile b/drivers/iio/pressure/Makefile
> new file mode 100644
> index 0000000..d4bb33e
> --- /dev/null
> +++ b/drivers/iio/pressure/Makefile
> @@ -0,0 +1,10 @@
> +#
> +# Makefile for industrial I/O pressure drivers
> +#
> +
> +obj-$(CONFIG_IIO_ST_PRESS) += st_pressure.o
> +st_pressure-y := st_pressure_core.o
> +st_pressure-$(CONFIG_IIO_BUFFER) += st_pressure_buffer.o
> +
> +obj-$(CONFIG_IIO_ST_PRESS_I2C) += st_pressure_i2c.o
> +obj-$(CONFIG_IIO_ST_PRESS_SPI) += st_pressure_spi.o
> diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h
> new file mode 100644
> index 0000000..414e45a
> --- /dev/null
> +++ b/drivers/iio/pressure/st_pressure.h
> @@ -0,0 +1,39 @@
> +/*
> + * STMicroelectronics pressures driver
> + *
> + * Copyright 2013 STMicroelectronics Inc.
> + *
> + * Denis Ciocca <denis.ciocca@xxxxxx>
> + * v. 1.0.0
> + * Licensed under the GPL-2.
> + */
> +
> +#ifndef ST_PRESS_H
> +#define ST_PRESS_H
> +
> +#include <linux/types.h>
> +#include <linux/iio/common/st_sensors.h>
> +
> +#define LPS331AP_PRESS_DEV_NAME "lps331ap"
> +
> +int st_press_common_probe(struct iio_dev *indio_dev);
> +void st_press_common_remove(struct iio_dev *indio_dev);
> +
> +#ifdef CONFIG_IIO_BUFFER
> +int st_press_allocate_ring(struct iio_dev *indio_dev);
> +void st_press_deallocate_ring(struct iio_dev *indio_dev);
> +int st_press_trig_set_state(struct iio_trigger *trig, bool state);
> +#define ST_PRESS_TRIGGER_SET_STATE (&st_press_trig_set_state)
> +#else /* CONFIG_IIO_BUFFER */
> +static inline int st_press_allocate_ring(struct iio_dev *indio_dev)
> +{
> + return 0;
> +}
> +
> +static inline void st_press_deallocate_ring(struct iio_dev *indio_dev)
> +{
> +}
> +#define ST_PRESS_TRIGGER_SET_STATE NULL
> +#endif /* CONFIG_IIO_BUFFER */
> +
> +#endif /* ST_PRESS_H */
> diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c
> new file mode 100644
> index 0000000..f877ef8
> --- /dev/null
> +++ b/drivers/iio/pressure/st_pressure_buffer.c
> @@ -0,0 +1,105 @@
> +/*
> + * STMicroelectronics pressures driver
> + *
> + * Copyright 2013 STMicroelectronics Inc.
> + *
> + * Denis Ciocca <denis.ciocca@xxxxxx>
> + *
> + * 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_pressure.h"
> +
> +int st_press_trig_set_state(struct iio_trigger *trig, bool state)
> +{
> + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
> +
> + return st_sensors_set_dataready_irq(indio_dev, state);
> +}
> +
> +static int st_press_buffer_preenable(struct iio_dev *indio_dev)
> +{
> + int err;
> +
> + err = st_sensors_set_enable(indio_dev, true);
> + if (err < 0)
> + goto st_press_set_enable_error;
> +
> + err = iio_sw_buffer_preenable(indio_dev);
> +
> +st_press_set_enable_error:
> + return err;
> +}
> +
> +static int st_press_buffer_postenable(struct iio_dev *indio_dev)
> +{
> + int err;
> + struct st_sensor_data *pdata = iio_priv(indio_dev);
> +
> + pdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
> + if (pdata->buffer_data == NULL) {
> + err = -ENOMEM;
> + goto allocate_memory_error;
> + }
> +
> + err = iio_triggered_buffer_postenable(indio_dev);
> + if (err < 0)
> + goto st_press_buffer_postenable_error;
> +
> + return err;
> +
> +st_press_buffer_postenable_error:
> + kfree(pdata->buffer_data);
> +allocate_memory_error:
> + return err;
> +}
> +
> +static int st_press_buffer_predisable(struct iio_dev *indio_dev)
> +{
> + int err;
> + struct st_sensor_data *pdata = iio_priv(indio_dev);
> +
> + err = iio_triggered_buffer_predisable(indio_dev);
> + if (err < 0)
> + goto st_press_buffer_predisable_error;
> +
> + err = st_sensors_set_enable(indio_dev, false);
> +
> +st_press_buffer_predisable_error:
> + kfree(pdata->buffer_data);
> + return err;
> +}
> +
> +static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
> + .preenable = &st_press_buffer_preenable,
> + .postenable = &st_press_buffer_postenable,
> + .predisable = &st_press_buffer_predisable,
> +};
> +
> +int st_press_allocate_ring(struct iio_dev *indio_dev)
> +{
> + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
> + &st_sensors_trigger_handler, &st_press_buffer_setup_ops);
> +}
> +
> +void st_press_deallocate_ring(struct iio_dev *indio_dev)
> +{
> + iio_triggered_buffer_cleanup(indio_dev);
> +}
> +
> +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
> +MODULE_DESCRIPTION("STMicroelectronics pressures buffer");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
> new file mode 100644
> index 0000000..9c343b4
> --- /dev/null
> +++ b/drivers/iio/pressure/st_pressure_core.c
> @@ -0,0 +1,272 @@
> +/*
> + * STMicroelectronics pressures driver
> + *
> + * Copyright 2013 STMicroelectronics Inc.
> + *
> + * Denis Ciocca <denis.ciocca@xxxxxx>
> + *
> + * 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.h>
> +#include <linux/iio/buffer.h>
> +#include <asm/unaligned.h>
> +
> +#include <linux/iio/common/st_sensors.h>
> +#include "st_pressure.h"
> +
> +#define ST_PRESS_MBAR_TO_KPASCAL(x) (x * 10)
> +#define ST_PRESS_NUMBER_DATA_CHANNELS 1
> +
> +/* DEFAULT VALUE FOR SENSORS */
> +#define ST_PRESS_DEFAULT_OUT_XL_ADDR 0x28
> +#define ST_TEMP_DEFAULT_OUT_L_ADDR 0x2b
> +
> +/* FULLSCALE */
> +#define ST_PRESS_FS_AVL_1260MB 1260
> +
> +/* CUSTOM VALUES FOR SENSOR 1 */
> +#define ST_PRESS_1_WAI_EXP 0xbb
> +#define ST_PRESS_1_ODR_ADDR 0x20
> +#define ST_PRESS_1_ODR_MASK 0x70
> +#define ST_PRESS_1_ODR_AVL_1HZ_VAL 0x01
> +#define ST_PRESS_1_ODR_AVL_7HZ_VAL 0x05
> +#define ST_PRESS_1_ODR_AVL_13HZ_VAL 0x06
> +#define ST_PRESS_1_ODR_AVL_25HZ_VAL 0x07
> +#define ST_PRESS_1_PW_ADDR 0x20
> +#define ST_PRESS_1_PW_MASK 0x80
> +#define ST_PRESS_1_FS_ADDR 0x23
> +#define ST_PRESS_1_FS_MASK 0x30
> +#define ST_PRESS_1_FS_AVL_1260_VAL 0x00
> +#define ST_PRESS_1_FS_AVL_1260_GAIN ST_PRESS_MBAR_TO_KPASCAL(244141)
> +#define ST_PRESS_1_FS_AVL_TEMP_GAIN 2083000
> +#define ST_PRESS_1_BDU_ADDR 0x20
> +#define ST_PRESS_1_BDU_MASK 0x04
> +#define ST_PRESS_1_DRDY_IRQ_ADDR 0x22
> +#define ST_PRESS_1_DRDY_IRQ_MASK 0x04
> +#define ST_PRESS_1_MULTIREAD_BIT true
> +#define ST_PRESS_1_TEMP_OFFSET 42500
> +
> +static const struct iio_chan_spec st_press_channels[] = {
> + ST_SENSORS_LSM_CHANNELS(IIO_PRESSURE,
> + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
> + ST_SENSORS_SCAN_X, 0, IIO_NO_MOD, 'u', IIO_LE, 24, 24,
> + ST_PRESS_DEFAULT_OUT_XL_ADDR),
> + ST_SENSORS_LSM_CHANNELS(IIO_TEMP,
> + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) |
> + BIT(IIO_CHAN_INFO_OFFSET),
> + -1, 0, IIO_NO_MOD, 's', IIO_LE, 16, 16,
> + ST_TEMP_DEFAULT_OUT_L_ADDR),
> + IIO_CHAN_SOFT_TIMESTAMP(1)
> +};
> +
> +static const struct st_sensors st_press_sensors[] = {
> + {
> + .wai = ST_PRESS_1_WAI_EXP,
> + .sensors_supported = {
> + [0] = LPS331AP_PRESS_DEV_NAME,
> + },
> + .ch = (struct iio_chan_spec *)st_press_channels,
> + .odr = {
> + .addr = ST_PRESS_1_ODR_ADDR,
> + .mask = ST_PRESS_1_ODR_MASK,
> + .odr_avl = {
> + { 1, ST_PRESS_1_ODR_AVL_1HZ_VAL, },
> + { 7, ST_PRESS_1_ODR_AVL_7HZ_VAL, },
> + { 13, ST_PRESS_1_ODR_AVL_13HZ_VAL, },
> + { 25, ST_PRESS_1_ODR_AVL_25HZ_VAL, },
> + },
> + },
> + .pw = {
> + .addr = ST_PRESS_1_PW_ADDR,
> + .mask = ST_PRESS_1_PW_MASK,
> + .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
> + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
> + },
> + .fs = {
> + .addr = ST_PRESS_1_FS_ADDR,
> + .mask = ST_PRESS_1_FS_MASK,
> + .fs_avl = {
> + [0] = {
> + .num = ST_PRESS_FS_AVL_1260MB,
> + .value = ST_PRESS_1_FS_AVL_1260_VAL,
> + .gain = ST_PRESS_1_FS_AVL_1260_GAIN,
> + .gain2 = ST_PRESS_1_FS_AVL_TEMP_GAIN,
> + },
> + },
> + },
> + .bdu = {
> + .addr = ST_PRESS_1_BDU_ADDR,
> + .mask = ST_PRESS_1_BDU_MASK,
> + },
> + .drdy_irq = {
> + .addr = ST_PRESS_1_DRDY_IRQ_ADDR,
> + .mask = ST_PRESS_1_DRDY_IRQ_MASK,
> + },
> + .multi_read_bit = ST_PRESS_1_MULTIREAD_BIT,
> + .bootime = 2,
> + },
> +};
> +
> +static int st_press_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 *pdata = 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;
> +
> + switch (ch->type) {
> + case IIO_PRESSURE:
> + *val2 = pdata->current_fullscale->gain;
> + break;
> + case IIO_TEMP:
> + *val2 = pdata->current_fullscale->gain2;
> + break;
> + default:
> + err = -EINVAL;
> + goto read_error;
> + }
> +
> + return IIO_VAL_INT_PLUS_NANO;
> + case IIO_CHAN_INFO_OFFSET:
> + switch (ch->type) {
> + case IIO_TEMP:
> + *val = 425;
> + *val2 = 10;
> + break;
> + default:
> + err = -EINVAL;
> + goto read_error;
> + }
> +
> + return IIO_VAL_FRACTIONAL;
> + default:
> + return -EINVAL;
> + }
> +
> +read_error:
> + return err;
> +}
> +
> +static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
> +static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
> +
> +static struct attribute *st_press_attributes[] = {
> + &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
> + &iio_dev_attr_sampling_frequency.dev_attr.attr,
> + NULL,
> +};
> +
> +static const struct attribute_group st_press_attribute_group = {
> + .attrs = st_press_attributes,
> +};
> +
> +static const struct iio_info press_info = {
> + .driver_module = THIS_MODULE,
> + .attrs = &st_press_attribute_group,
> + .read_raw = &st_press_read_raw,
> +};
> +
> +#ifdef CONFIG_IIO_TRIGGER
> +static const struct iio_trigger_ops st_press_trigger_ops = {
> + .owner = THIS_MODULE,
> + .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
> +};
> +#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
> +#else
> +#define ST_PRESS_TRIGGER_OPS NULL
> +#endif
> +
> +int st_press_common_probe(struct iio_dev *indio_dev)
> +{
> + int err;
> + struct st_sensor_data *pdata = iio_priv(indio_dev);
> +
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->info = &press_info;
> +
> + err = st_sensors_check_device_support(indio_dev,
> + ARRAY_SIZE(st_press_sensors), st_press_sensors);
> + if (err < 0)
> + goto st_press_common_probe_error;
> +
> + pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
> + pdata->multiread_bit = pdata->sensor->multi_read_bit;
> + indio_dev->channels = pdata->sensor->ch;
> + indio_dev->num_channels = ARRAY_SIZE(st_press_channels);
> +
> + pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
> + &pdata->sensor->fs.fs_avl[0];
> + pdata->odr = pdata->sensor->odr.odr_avl[0].hz;
> +
> + err = st_sensors_init_sensor(indio_dev);
> + if (err < 0)
> + goto st_press_common_probe_error;
> +
> + if (pdata->get_irq_data_ready(indio_dev) > 0) {
> + err = st_press_allocate_ring(indio_dev);
> + if (err < 0)
> + goto st_press_common_probe_error;
> +
> + err = st_sensors_allocate_trigger(indio_dev,
> + ST_PRESS_TRIGGER_OPS);
> + if (err < 0)
> + goto st_press_probe_trigger_error;
> + }
> +
> + err = iio_device_register(indio_dev);
> + if (err)
> + goto st_press_device_register_error;
> +
> + return err;
> +
> +st_press_device_register_error:
> + if (pdata->get_irq_data_ready(indio_dev) > 0)
> + st_sensors_deallocate_trigger(indio_dev);
> +st_press_probe_trigger_error:
> + if (pdata->get_irq_data_ready(indio_dev) > 0)
> + st_press_deallocate_ring(indio_dev);
> +st_press_common_probe_error:
> + return err;
> +}
> +EXPORT_SYMBOL(st_press_common_probe);
> +
> +void st_press_common_remove(struct iio_dev *indio_dev)
> +{
> + struct st_sensor_data *pdata = iio_priv(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> + if (pdata->get_irq_data_ready(indio_dev) > 0) {
> + st_sensors_deallocate_trigger(indio_dev);
> + st_press_deallocate_ring(indio_dev);
> + }
> + iio_device_free(indio_dev);
> +}
> +EXPORT_SYMBOL(st_press_common_remove);
> +
> +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
> +MODULE_DESCRIPTION("STMicroelectronics pressures driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c
> new file mode 100644
> index 0000000..7cebcc7
> --- /dev/null
> +++ b/drivers/iio/pressure/st_pressure_i2c.c
> @@ -0,0 +1,77 @@
> +/*
> + * STMicroelectronics pressures driver
> + *
> + * Copyright 2013 STMicroelectronics Inc.
> + *
> + * Denis Ciocca <denis.ciocca@xxxxxx>
> + *
> + * 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/common/st_sensors.h>
> +#include <linux/iio/common/st_sensors_i2c.h>
> +#include "st_pressure.h"
> +
> +static int st_press_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct iio_dev *indio_dev;
> + struct st_sensor_data *pdata;
> + int err;
> +
> + indio_dev = iio_device_alloc(sizeof(*pdata));
> + if (indio_dev == NULL) {
> + err = -ENOMEM;
> + goto iio_device_alloc_error;
> + }
> +
> + pdata = iio_priv(indio_dev);
> + pdata->dev = &client->dev;
> +
> + st_sensors_i2c_configure(indio_dev, client, pdata);
> +
> + err = st_press_common_probe(indio_dev);
> + if (err < 0)
> + goto st_press_common_probe_error;
> +
> + return 0;
> +
> +st_press_common_probe_error:
> + iio_device_free(indio_dev);
> +iio_device_alloc_error:
> + return err;
> +}
> +
> +static int st_press_i2c_remove(struct i2c_client *client)
> +{
> + st_press_common_remove(i2c_get_clientdata(client));
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id st_press_id_table[] = {
> + { LPS331AP_PRESS_DEV_NAME },
> + {},
> +};
> +MODULE_DEVICE_TABLE(i2c, st_press_id_table);
> +
> +static struct i2c_driver st_press_driver = {
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = "st-press-i2c",
> + },
> + .probe = st_press_i2c_probe,
> + .remove = st_press_i2c_remove,
> + .id_table = st_press_id_table,
> +};
> +module_i2c_driver(st_press_driver);
> +
> +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
> +MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iio/pressure/st_pressure_spi.c b/drivers/iio/pressure/st_pressure_spi.c
> new file mode 100644
> index 0000000..17a1490
> --- /dev/null
> +++ b/drivers/iio/pressure/st_pressure_spi.c
> @@ -0,0 +1,76 @@
> +/*
> + * STMicroelectronics pressures driver
> + *
> + * Copyright 2013 STMicroelectronics Inc.
> + *
> + * Denis Ciocca <denis.ciocca@xxxxxx>
> + *
> + * 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/common/st_sensors.h>
> +#include <linux/iio/common/st_sensors_spi.h>
> +#include "st_pressure.h"
> +
> +static int st_press_spi_probe(struct spi_device *spi)
> +{
> + struct iio_dev *indio_dev;
> + struct st_sensor_data *pdata;
> + int err;
> +
> + indio_dev = iio_device_alloc(sizeof(*pdata));
> + if (indio_dev == NULL) {
> + err = -ENOMEM;
> + goto iio_device_alloc_error;
> + }
> +
> + pdata = iio_priv(indio_dev);
> + pdata->dev = &spi->dev;
> +
> + st_sensors_spi_configure(indio_dev, spi, pdata);
> +
> + err = st_press_common_probe(indio_dev);
> + if (err < 0)
> + goto st_press_common_probe_error;
> +
> + return 0;
> +
> +st_press_common_probe_error:
> + iio_device_free(indio_dev);
> +iio_device_alloc_error:
> + return err;
> +}
> +
> +static int st_press_spi_remove(struct spi_device *spi)
> +{
> + st_press_common_remove(spi_get_drvdata(spi));
> +
> + return 0;
> +}
> +
> +static const struct spi_device_id st_press_id_table[] = {
> + { LPS331AP_PRESS_DEV_NAME },
> + {},
> +};
> +MODULE_DEVICE_TABLE(spi, st_press_id_table);
> +
> +static struct spi_driver st_press_driver = {
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = "st-press-spi",
> + },
> + .probe = st_press_spi_probe,
> + .remove = st_press_spi_remove,
> + .id_table = st_press_id_table,
> +};
> +module_spi_driver(st_press_driver);
> +
> +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>");
> +MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
> +MODULE_LICENSE("GPL v2");
>
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