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iio:imu:mpu6050: enhance mounting matrix support

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Add a new rotation matrix sysfs attribute compliant with IIO core
mounting matrix API.
Matrix is retrieved from "in_anglvel_mount_matrix" and
"in_accel_mount_matrix" sysfs attributes. It is declared into mpu6050 DTS
entry as a "mount-matrix" property.

Old interface is kept for backward userspace compatibility and may be
retrieved from legacy platform_data mechanism only.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie
2016-04-20 19:23:45 +02:00
committed by Jonathan Cameron
parent 97eacb9166
commit eb3798463f
5 changed files with 55 additions and 5 deletions
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5
include/linux/platform_data/invensense_mpu6050.h
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@@ -16,13 +16,16 @@
/**
* struct inv_mpu6050_platform_data - Platform data for the mpu driver
* @orientation: Orientation matrix of the chip
* @orientation: Orientation matrix of the chip (deprecated in favor of
* mounting matrix retrieved from device-tree)
*
* Contains platform specific information on how to configure the MPU6050 to
* work on this platform. The orientation matricies are 3x3 rotation matricies
* that are applied to the data to rotate from the mounting orientation to the
* platform orientation. The values must be one of 0, 1, or -1 and each row and
* column should have exactly 1 non-zero value.
*
* Deprecated in favor of mounting matrix retrieved from device-tree.
*/
struct inv_mpu6050_platform_data {
__s8 orientation[9];