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Commit 217494e5 authored by Denis CIOCCA's avatar Denis CIOCCA Committed by Jonathan Cameron
Browse files

iio:pressure: Add STMicroelectronics pressures driver 



This patch adds a generic pressure driver for STMicroelectronics
pressure sensors, currently it supports: LPS331AP.

Signed-off-by: default avatarDenis Ciocca <denis.ciocca@st.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 607a568a

drivers/iio/Kconfig

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@@ -73,5 +73,6 @@ source "drivers/iio/magnetometer/Kconfig" 
if IIO_TRIGGER

if IIO_TRIGGER

   source "drivers/iio/trigger/Kconfig"

   source "drivers/iio/trigger/Kconfig"

endif #IIO_TRIGGER

endif #IIO_TRIGGER

source "drivers/iio/pressure/Kconfig"





endif # IIO
 
endif # IIO

drivers/iio/Makefile

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@@ -22,3 +22,4 @@ obj-y += imu/ 
obj-y += light/

obj-y += light/

obj-y += magnetometer/

obj-y += magnetometer/

obj-y += trigger/

obj-y += trigger/

obj-y += pressure/

drivers/iio/pressure/Kconfig

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#

# 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

drivers/iio/pressure/Makefile

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#

# 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

drivers/iio/pressure/st_pressure.h

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/*

 * STMicroelectronics pressures driver

 *

 * Copyright 2013 STMicroelectronics Inc.

 *

 * Denis Ciocca <denis.ciocca@st.com>

 * 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 */