iio: imu: Add support for the FXOS8700 IMU

FXOS8700CQ is a small, low-power, 3-axis linear accelerometer and 3-axis magnetometer combined into a single package. The device features a selectable I2C or point-to-point SPI serial interface with 14-bit accelerometer and 16-bit magnetometer ADC resolution along with smart-embedded functions. FXOS8700CQ has dynamically selectable accelerationfull-scale ranges of ±2 g/±4 g/±8 g and a fixed magnetic measurement range of ±1200 μT. Output data rates (ODR) from 1.563 Hz to 800 Hz are selectable by the user for each sensor. Interleaved magnetic and acceleration data is available at ODR rates of up to 400 Hz. FXOS8700CQ is available in a plastic QFN package and it is guaranteed to operate over the extended temperature range of –40 °C to +85 °C. TODO: Trigger and IRQ configuration support Datasheet: http://cache.freescale.com/files/sensors/doc/data_sheet/FXOS8700CQ.pdf Signed-off-by: Robert Jones <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]>
kergoth · Oct 22, 2019 · 84e5ddd · 84e5ddd
1 parent 4d6f939
commit 84e5ddd
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diff --git a/drivers/iio/imu/Kconfig b/drivers/iio/imu/Kconfig
@@ -40,6 +40,33 @@ config ADIS16480
 
 source "drivers/iio/imu/bmi160/Kconfig"
 
+config FXOS8700
+	tristate
+
+config FXOS8700_I2C
+	tristate "NXP FXOS8700 I2C driver"
+	depends on I2C
+	select FXOS8700
+	select REGMAP_I2C
+	help
+	  Say yes here to build support for the NXP FXOS8700 m+g combo
+	  sensor on I2C.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called fxos8700_i2c.
+
+config FXOS8700_SPI
+	tristate "NXP FXOS8700 SPI driver"
+	depends on SPI
+	select FXOS8700
+	select REGMAP_SPI
+	help
+	  Say yes here to build support for the NXP FXOS8700 m+g combo
+	  sensor on SPI.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called fxos8700_spi.
+
 config KMX61
 	tristate "Kionix KMX61 6-axis accelerometer and magnetometer"
 	depends on I2C

diff --git a/drivers/iio/imu/Makefile b/drivers/iio/imu/Makefile
@@ -14,6 +14,11 @@ adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_buffer.o
 obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o
 
 obj-y += bmi160/
+
+obj-$(CONFIG_FXOS8700) += fxos8700_core.o
+obj-$(CONFIG_FXOS8700_I2C) += fxos8700_i2c.o
+obj-$(CONFIG_FXOS8700_SPI) += fxos8700_spi.o
+
 obj-y += inv_mpu6050/
 
 obj-$(CONFIG_KMX61) += kmx61.o

diff --git a/drivers/iio/imu/fxos8700.h b/drivers/iio/imu/fxos8700.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef FXOS8700_H_
+#define FXOS8700_H_
+
+extern const struct regmap_config fxos8700_regmap_config;
+
+int fxos8700_core_probe(struct device *dev, struct regmap *regmap,
+			const char *name, bool use_spi);
+
+#endif  /* FXOS8700_H_ */