98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/iio/iio.h>
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#include <linux/mutex.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/i2c.h>
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/**
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* enum mpu3050_fullscale - indicates the full range of the sensor in deg/sec
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*/
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enum mpu3050_fullscale {
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FS_250_DPS = 0,
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FS_500_DPS,
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FS_1000_DPS,
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FS_2000_DPS,
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};
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/**
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* enum mpu3050_lpf - indicates the low pass filter width
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*/
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enum mpu3050_lpf {
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/* This implicity sets sample frequency to 8 kHz */
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LPF_256_HZ_NOLPF = 0,
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/* All others sets the sample frequency to 1 kHz */
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LPF_188_HZ,
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LPF_98_HZ,
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LPF_42_HZ,
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LPF_20_HZ,
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LPF_10_HZ,
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LPF_5_HZ,
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LPF_2100_HZ_NOLPF,
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};
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enum mpu3050_axis {
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AXIS_X = 0,
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AXIS_Y,
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AXIS_Z,
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AXIS_MAX,
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};
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/**
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* struct mpu3050 - instance state container for the device
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* @dev: parent device for this instance
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* @orientation: mounting matrix, flipped axis etc
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* @map: regmap to reach the registers
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* @lock: serialization lock to marshal all requests
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* @irq: the IRQ used for this device
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* @regs: the regulators to power this device
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* @fullscale: the current fullscale setting for the device
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* @lpf: digital low pass filter setting for the device
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* @divisor: base frequency divider: divides 8 or 1 kHz
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* @calibration: the three signed 16-bit calibration settings that
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* get written into the offset registers for each axis to compensate
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* for DC offsets
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* @trig: trigger for the MPU-3050 interrupt, if present
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* @hw_irq_trigger: hardware interrupt trigger is in use
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* @irq_actl: interrupt is active low
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* @irq_latch: latched IRQ, this means that it is a level IRQ
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* @irq_opendrain: the interrupt line shall be configured open drain
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* @pending_fifo_footer: tells us if there is a pending footer in the FIFO
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* that we have to read out first when handling the FIFO
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* @hw_timestamp: latest hardware timestamp from the trigger IRQ, when in
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* use
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* @i2cmux: an I2C mux reflecting the fact that this sensor is a hub with
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* a pass-through I2C interface coming out of it: this device needs to be
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* powered up in order to reach devices on the other side of this mux
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*/
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struct mpu3050 {
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struct device *dev;
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struct iio_mount_matrix orientation;
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struct regmap *map;
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struct mutex lock;
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int irq;
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struct regulator_bulk_data regs[2];
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enum mpu3050_fullscale fullscale;
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enum mpu3050_lpf lpf;
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u8 divisor;
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s16 calibration[3];
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struct iio_trigger *trig;
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bool hw_irq_trigger;
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bool irq_actl;
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bool irq_latch;
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bool irq_opendrain;
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bool pending_fifo_footer;
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s64 hw_timestamp;
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struct i2c_mux_core *i2cmux;
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};
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/* Probe called from different transports */
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int mpu3050_common_probe(struct device *dev,
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struct regmap *map,
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int irq,
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const char *name);
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void mpu3050_common_remove(struct device *dev);
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/* PM ops */
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extern const struct dev_pm_ops mpu3050_dev_pm_ops;
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