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Commit b51c3698 authored by shaoxing's avatar shaoxing
Browse files

msm: iio: add mpu9250 sensor driver support for apq8096 drone 



Apq8096 drone has imu sensor mounted on spi0, add this driver
to support lowlevel operation.

Change-Id: I66cc6842148dd2bc85435d56295682dfba797957
Signed-off-by: default avatarshaoxing <shaoxing@codeaurora.org>
parent a72b085f

Documentation/devicetree/bindings/iio/imu/inv_mpu9250.txt

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The mpu9250 sensor is 9-axis gyroscope+accelerometer+magnetometer combo

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

via SPI bus with max frequency up to 20MHz. The recommended

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



Required properties:

 - compatible        : Should be "invn,mpu9250".

 - reg               : the Chip select ID.

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

 - invn,mu9250-irq   : the irq gpio.



Optional properties:

 - spi-cpol       : SPI MODE(CPOL).

 - spi-cpha       : SPI MODE(CPHA).



spi-cpol,spi-cpha,spi-max-frequency information is described in

Documentation/devicetree/bindings/spi/spi_qsd.txt.



Example:

	spi@7575000 {

		mpu9250-spi@0 {

			compatible = "invn,mpu9250";

			reg = <0>;

			spi-max-frequency = <8000000>;

			invn,mpu9250-irq = <&tlmm 79 0>;

			spi-cpol;

			spi-cpha;

		};

	};

drivers/iio/imu/Kconfig

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@@ -28,6 +28,7 @@ config ADIS16480 
source "drivers/iio/imu/inv_mpu6050/Kconfig"

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

source "drivers/iio/imu/bmi160/Kconfig"

source "drivers/iio/imu/inv_mpu9250/Kconfig"



endmenu

drivers/iio/imu/Makefile

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@@ -16,3 +16,4 @@ obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o 
obj-y += inv_mpu6050/

obj-y += inv_icm20689/

obj-y += bmi160/

obj-y += inv_mpu9250/

drivers/iio/imu/inv_mpu9250/Kconfig

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#

# inv_mpu9250 drivers for Invensense MPU devices and combos

#



config INV_MPU9250_IIO

	tristate "Invensense MPU9250 devices"

	depends on SPI && SYSFS

	select IIO_BUFFER

	select IIO_BUFFER_CB

        select IIO_TRIGGERED_BUFFER

	help

	  This driver supports the Invensense MPU9250 devices.

	  It is a gyroscope/accelerometer combo device.

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

	  inv-mpu9250.

drivers/iio/imu/inv_mpu9250/Makefile

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#

# Makefile for Invensense MPU9250 device.

#



obj-$(CONFIG_INV_MPU9250_IIO) += inv-mpu9250.o

inv-mpu9250-objs := inv_mpu9250_core.o inv_mpu9250_ring.o inv_mpu9250_trigger.o