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