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Commit ef89f4b9 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio: adxl345: Add support for the ADXL375 

The ADXL375 is fully register map compatible to the ADXL345 (including the
device ID register returning the same value ...).

The only difference is the resolution of the acceleration sensor. The
ADXL375 can measure up to +-200g of acceleration.

Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL375.PDF



Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMircea Caprioru <mircea.caprioru@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent a4217498

Documentation/devicetree/bindings/iio/accel/adxl345.txt

+5 −2
Original line number Diff line number Diff line 
Analog Devices ADXL345 3-Axis, +/-(2g/4g/8g/16g) Digital Accelerometer

Analog Devices ADXL345/ADXL375 3-Axis Digital Accelerometers



http://www.analog.com/en/products/mems/accelerometers/adxl345.html

http://www.analog.com/en/products/sensors-mems/accelerometers/adxl375.html



Required properties:

 - compatible : should be "adi,adxl345"

 - compatible : should be one of

		"adi,adxl345"

		"adi,adxl375"

 - reg : the I2C address or SPI chip select number of the sensor



Required properties for SPI bus usage:

drivers/iio/accel/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ config ADXL345_I2C 
	select REGMAP_I2C

	help

	  Say Y here if you want to build support for the Analog Devices

	  ADXL345 3-axis digital accelerometer.

	  ADXL345 or ADXL375 3-axis digital accelerometer.



	  To compile this driver as a module, choose M here: the module

	  will be called adxl345_i2c and you will also get adxl345_core
@@ -54,7 +54,7 @@ config ADXL345_SPI 
	select REGMAP_SPI

	help

	  Say Y here if you want to build support for the Analog Devices

	  ADXL345 3-axis digital accelerometer.

	  ADXL345 or ADXL375 3-axis digital accelerometer.



	  To compile this driver as a module, choose M here: the module

	  will be called adxl345_spi and you will also get adxl345_core

drivers/iio/accel/adxl345.h

+6 −1
Original line number Diff line number Diff line
@@ -11,8 +11,13 @@ 
#ifndef _ADXL345_H_

#define _ADXL345_H_



enum adxl345_device_type {

	ADXL345,

	ADXL375,

};



int adxl345_core_probe(struct device *dev, struct regmap *regmap,

		       const char *name);

		       enum adxl345_device_type type, const char *name);

int adxl345_core_remove(struct device *dev);



#endif /* _ADXL345_H_ */

drivers/iio/accel/adxl345_core.c

+17 −2
Original line number Diff line number Diff line
@@ -56,9 +56,16 @@ 
 */

static const int adxl345_uscale = 38300;



/*

 * The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's

 * ~480mm/s**2 per LSB.

 */

static const int adxl375_uscale = 480000;



struct adxl345_data {

	struct regmap *regmap;

	u8 data_range;

	enum adxl345_device_type type;

};



#define ADXL345_CHANNEL(index, axis) {					\
@@ -105,7 +112,14 @@ static int adxl345_read_raw(struct iio_dev *indio_dev, 
		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

		*val = 0;

		switch (data->type) {

		case ADXL345:

			*val2 = adxl345_uscale;

			break;

		case ADXL375:

			*val2 = adxl375_uscale;

			break;

		}



		return IIO_VAL_INT_PLUS_MICRO;

	case IIO_CHAN_INFO_CALIBBIAS:
@@ -198,7 +212,7 @@ static const struct iio_info adxl345_info = { 
};



int adxl345_core_probe(struct device *dev, struct regmap *regmap,

		       const char *name)

		       enum adxl345_device_type type, const char *name)

{

	struct adxl345_data *data;

	struct iio_dev *indio_dev;
@@ -224,6 +238,7 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap, 
	data = iio_priv(indio_dev);

	dev_set_drvdata(dev, indio_dev);

	data->regmap = regmap;

	data->type = type;

	/* Enable full-resolution mode */

	data->data_range = ADXL345_DATA_FORMAT_FULL_RES;

drivers/iio/accel/adxl345_i2c.c

+5 −2
Original line number Diff line number Diff line
@@ -34,7 +34,8 @@ static int adxl345_i2c_probe(struct i2c_client *client, 
		return PTR_ERR(regmap);

	}



	return adxl345_core_probe(&client->dev, regmap, id ? id->name : NULL);

	return adxl345_core_probe(&client->dev, regmap, id->driver_data,

				  id ? id->name : NULL);

}



static int adxl345_i2c_remove(struct i2c_client *client)
@@ -43,7 +44,8 @@ static int adxl345_i2c_remove(struct i2c_client *client) 
}



static const struct i2c_device_id adxl345_i2c_id[] = {

	{ "adxl345", 0 },

	{ "adxl345", ADXL345 },

	{ "adxl375", ADXL375 },

	{ }

};
@@ -51,6 +53,7 @@ MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id); 


static const struct of_device_id adxl345_of_match[] = {

	{ .compatible = "adi,adxl345" },

	{ .compatible = "adi,adxl375" },

	{ },

};