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https://github.com/Telecominfraproject/OpenCellular.git
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fc17034c52
Move calibration in the EC to returns raw value with offset already applied, as recommended by iio interface. BRANCH=smaug TEST=On Samus, with kernel change CL:283103 Check raw value are returned properly. BUG=chromium:506101 Change-Id: I3dcb4f2fcfff35639e3bfdcc6c1468bdb5e53c45 Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/283161 Reviewed-by: Alec Berg <alecaberg@chromium.org>
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __CROS_EC_ACCELGYRO_H
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#define __CROS_EC_ACCELGYRO_H
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#include "motion_sense.h"
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/* Header file for accelerometer / gyro drivers. */
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/* Number of counts from accelerometer that represents 1G acceleration. */
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#define ACCEL_G 1024
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struct accelgyro_drv {
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/**
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* Initialize accelerometers.
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* @s Pointer to sensor data pointer. Sensor data will be
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* allocated on success.
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*init)(const struct motion_sensor_t *s);
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/**
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* Read all three accelerations of an accelerometer. Note that all
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* three accelerations come back in counts, where ACCEL_G can be used
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* to convert counts to engineering units.
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* @s Pointer to sensor data.
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* @v Vector to store acceleration (in units of counts).
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*read)(const struct motion_sensor_t *s, vector_3_t v);
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/**
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* Setter and getter methods for the sensor range. The sensor range
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* defines the maximum value that can be returned from read(). As the
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* range increases, the resolution gets worse.
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* @s Pointer to sensor data.
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* @range Range (Units are +/- G's for accel, +/- deg/s for gyro)
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* @rnd Rounding flag. If true, it rounds up to nearest valid
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* value. Otherwise, it rounds down.
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*set_range)(const struct motion_sensor_t *s,
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int range,
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int rnd);
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int (*get_range)(const struct motion_sensor_t *s,
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int *range);
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/**
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* Setter and getter methods for the sensor resolution.
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* @s Pointer to sensor data.
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* @range Resolution (Units are number of bits)
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* param rnd Rounding flag. If true, it rounds up to nearest valid
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* value. Otherwise, it rounds down.
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*set_resolution)(const struct motion_sensor_t *s,
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int res,
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int rnd);
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int (*get_resolution)(const struct motion_sensor_t *s,
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int *res);
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/**
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* Setter and getter methods for the sensor output data range. As the
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* ODR increases, the LPF roll-off frequency also increases.
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* @s Pointer to sensor data.
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* @rate Output data rate (units are milli-Hz)
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* @rnd Rounding flag. If true, it rounds up to nearest valid
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* value. Otherwise, it rounds down.
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*set_data_rate)(const struct motion_sensor_t *s,
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int rate,
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int rnd);
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int (*get_data_rate)(const struct motion_sensor_t *s,
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int *rate);
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/**
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* Setter and getter methods for the sensor offset.
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* @s Pointer to sensor data.
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* @offset: offset to apply to raw data.
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* @temp: temperature when calibration was done.
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* @return EC_SUCCESS if successful, non-zero if error.
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*/
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int (*set_offset)(const struct motion_sensor_t *s,
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const int16_t *offset,
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int16_t temp);
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int (*get_offset)(const struct motion_sensor_t *s,
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int16_t *offset,
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int16_t *temp);
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#ifdef CONFIG_ACCEL_INTERRUPTS
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/**
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* Setup a one-time accel interrupt. If the threshold is low enough, the
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* interrupt may trigger due simply to noise and not any real motion.
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* If the threshold is 0, the interrupt will fire immediately.
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* @s Pointer to sensor data.
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* @threshold Threshold for interrupt in units of counts.
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*/
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int (*set_interrupt)(const struct motion_sensor_t *s,
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unsigned int threshold);
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#endif
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};
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#endif /* __CROS_EC_ACCELGYRO_H */
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