iio/gyro/mpu3050.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #include <linux/iio/iio.h>
0003 #include <linux/mutex.h>
0004 #include <linux/regmap.h>
0005 #include <linux/regulator/consumer.h>
0006 #include <linux/i2c.h>
0007
0008 /**
0009  * enum mpu3050_fullscale - indicates the full range of the sensor in deg/sec
0010  */
0011 enum mpu3050_fullscale {
0012     FS_250_DPS = 0,
0013     FS_500_DPS,
0014     FS_1000_DPS,
0015     FS_2000_DPS,
0016 };
0017
0018 /**
0019  * enum mpu3050_lpf - indicates the low pass filter width
0020  */
0021 enum mpu3050_lpf {
0022     /* This implicity sets sample frequency to 8 kHz */
0023     LPF_256_HZ_NOLPF = 0,
0024     /* All others sets the sample frequency to 1 kHz */
0025     LPF_188_HZ,
0026     LPF_98_HZ,
0027     LPF_42_HZ,
0028     LPF_20_HZ,
0029     LPF_10_HZ,
0030     LPF_5_HZ,
0031     LPF_2100_HZ_NOLPF,
0032 };
0033
0034 enum mpu3050_axis {
0035     AXIS_X = 0,
0036     AXIS_Y,
0037     AXIS_Z,
0038     AXIS_MAX,
0039 };
0040
0041 /**
0042  * struct mpu3050 - instance state container for the device
0043  * @dev: parent device for this instance
0044  * @orientation: mounting matrix, flipped axis etc
0045  * @map: regmap to reach the registers
0046  * @lock: serialization lock to marshal all requests
0047  * @irq: the IRQ used for this device
0048  * @regs: the regulators to power this device
0049  * @fullscale: the current fullscale setting for the device
0050  * @lpf: digital low pass filter setting for the device
0051  * @divisor: base frequency divider: divides 8 or 1 kHz
0052  * @calibration: the three signed 16-bit calibration settings that
0053  * get written into the offset registers for each axis to compensate
0054  * for DC offsets
0055  * @trig: trigger for the MPU-3050 interrupt, if present
0056  * @hw_irq_trigger: hardware interrupt trigger is in use
0057  * @irq_actl: interrupt is active low
0058  * @irq_latch: latched IRQ, this means that it is a level IRQ
0059  * @irq_opendrain: the interrupt line shall be configured open drain
0060  * @pending_fifo_footer: tells us if there is a pending footer in the FIFO
0061  * that we have to read out first when handling the FIFO
0062  * @hw_timestamp: latest hardware timestamp from the trigger IRQ, when in
0063  * use
0064  * @i2cmux: an I2C mux reflecting the fact that this sensor is a hub with
0065  * a pass-through I2C interface coming out of it: this device needs to be
0066  * powered up in order to reach devices on the other side of this mux
0067  */
0068 struct mpu3050 {
0069     struct device *dev;
0070     struct iio_mount_matrix orientation;
0071     struct regmap *map;
0072     struct mutex lock;
0073     int irq;
0074     struct regulator_bulk_data regs[2];
0075     enum mpu3050_fullscale fullscale;
0076     enum mpu3050_lpf lpf;
0077     u8 divisor;
0078     s16 calibration[3];
0079     struct iio_trigger *trig;
0080     bool hw_irq_trigger;
0081     bool irq_actl;
0082     bool irq_latch;
0083     bool irq_opendrain;
0084     bool pending_fifo_footer;
0085     s64 hw_timestamp;
0086     struct i2c_mux_core *i2cmux;
0087 };
0088
0089 /* Probe called from different transports */
0090 int mpu3050_common_probe(struct device *dev,
0091              struct regmap *map,
0092              int irq,
0093              const char *name);
0094 void mpu3050_common_remove(struct device *dev);
0095
0096 /* PM ops */
0097 extern const struct dev_pm_ops mpu3050_dev_pm_ops;