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Commit 7af1d001 authored by Luo Weizhang's avatar Luo Weizhang
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drivers: iio: InvenSense ICM20689 driver 



The ICM20689 sensor is a 6-axis gyro/accel combo
device. This is a referrence driver followed the
Kernel IIO architecture. The sample rate is up to
8K if it's triggered by SMD.

CRs-fixed: 1039160
Change-Id: I8ca1c1db13be9e31ee4e9c55bdaeed72ffa94a48
Signed-off-by: default avatarLuo Weizhang <luow@codeaurora.org>
parent 8eefef21

Documentation/devicetree/bindings/iio/imu/invn-icm20689.txt

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The ICM20689 sensor is 6-axis gyroscope+accelerometer combo

device which is made by InvenSense Inc. It can be accessed

via SPI bus with max frequency up to 8MHz. The recommended

SPI mode is the mode 3(CPOL=1, CPHA=1).



The datasheet can be found as the following link:

https://www.invensense.com/products/motion-tracking/6-axis/icm-20689/





Required properties:



 - compatible		: Should be "invn,icm20689".

 - reg		: the Chip select ID.

 - spi-max-frequency: the SPI bus max frequency



Optional properties:

 - invn,icm20689-irq:  the irq gpio. This is not used if

 using SMD to trigger. this is needed only if using the

 device IRQ to trigger. Only using SMD to trigger can

 support 8K sample rate.



 - spi-cpol		: SPI MODE(CPOL)

 - spi-cpha		: SPI MODE(CPHA)



Example:

	spi@78b6000 {

		icm20689-spi@0 {

			compatible = "invn,icm20689";

			reg = <0>;

			spi-max-frequency = <8000000>;

			invn,icm20689-irq = <&msm_gpio 96 0>;

			spi-cpol;

			spi-cpha;

		};

	};
 
 No newline at end of file

drivers/iio/imu/Kconfig

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@@ -26,6 +26,7 @@ config ADIS16480 
	  ADIS16485, ADIS16488 inertial sensors.



source "drivers/iio/imu/inv_mpu6050/Kconfig"

source "drivers/iio/imu/inv_icm20689/Kconfig"



endmenu

drivers/iio/imu/Makefile

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@@ -14,3 +14,4 @@ adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_buffer.o 
obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o



obj-y += inv_mpu6050/

obj-y += inv_icm20689/

drivers/iio/imu/inv_icm20689/Kconfig

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#

# inv-icm20689 drivers for Invensense MPU devices and combos

#



config INV_ICM20689_IIO

	tristate "Invensense ICM20689 devices"

	depends on SPI && SYSFS && CONFIG_MSM_SMD

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	help

	  This driver supports the Invensense ICM20689 devices.

	  It is a gyroscope/accelerometer combo device.

	  This driver can be built as a module. The module will be called

	  inv-icm20689.

drivers/iio/imu/inv_icm20689/Makefile

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#

# Makefile for Invensense icm20689 device.

#



obj-$(CONFIG_INV_ICM20689_IIO) += inv-icm20689.o

inv-icm20689-objs := inv_icm20689_core.o inv_icm20689_ring.o inv_icm20689_trigger.o smd_trig.o