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Expose a rotation matrix to indicate userspace the chip placement with respect to the overall hardware system. This is needed to adjust coordinates sampled from a sensor chip when its position deviates from the main hardware system. Final coordinates computation is delegated to userspace since: * computation may involve floating point arithmetics ; * it allows an application to combine adjustments with arbitrary transformations. This 3 dimentional space rotation matrix is expressed as 3x3 array of strings to support floating point numbers. It may be retrieved from a "[<dir>_][<type>_]mount_matrix" sysfs attribute file. It is declared into a device / driver specific DTS property or platform data. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org> |
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| .. | ||
| accel | ||
| adc | ||
| common | ||
| dac | ||
| frequency | ||
| gyro | ||
| imu | ||
| buffer-dma.h | ||
| buffer-dmaengine.h | ||
| buffer.h | ||
| configfs.h | ||
| consumer.h | ||
| driver.h | ||
| events.h | ||
| iio.h | ||
| kfifo_buf.h | ||
| machine.h | ||
| sw_trigger.h | ||
| sysfs.h | ||
| trigger_consumer.h | ||
| trigger.h | ||
| triggered_buffer.h | ||
| triggered_event.h | ||
| types.h | ||