/* SPDX-License-Identifier: GPL-2.0 */ #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); void mpu3050_common_remove(struct device *dev); /* PM ops */ extern const struct dev_pm_ops mpu3050_dev_pm_ops;