1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #include <linux/iio/iio.h> 3 #include <linux/mutex.h> 4 #include <linux/regmap.h> 5 #include <linux/regulator/consumer.h> 6 #include <linux/i2c.h> 7 8 /** 9 * enum mpu3050_fullscale - indicates the full range of the sensor in deg/sec 10 */ 11 enum mpu3050_fullscale { 12 FS_250_DPS = 0, 13 FS_500_DPS, 14 FS_1000_DPS, 15 FS_2000_DPS, 16 }; 17 18 /** 19 * enum mpu3050_lpf - indicates the low pass filter width 20 */ 21 enum mpu3050_lpf { 22 /* This implicity sets sample frequency to 8 kHz */ 23 LPF_256_HZ_NOLPF = 0, 24 /* All others sets the sample frequency to 1 kHz */ 25 LPF_188_HZ, 26 LPF_98_HZ, 27 LPF_42_HZ, 28 LPF_20_HZ, 29 LPF_10_HZ, 30 LPF_5_HZ, 31 LPF_2100_HZ_NOLPF, 32 }; 33 34 enum mpu3050_axis { 35 AXIS_X = 0, 36 AXIS_Y, 37 AXIS_Z, 38 AXIS_MAX, 39 }; 40 41 /** 42 * struct mpu3050 - instance state container for the device 43 * @dev: parent device for this instance 44 * @orientation: mounting matrix, flipped axis etc 45 * @map: regmap to reach the registers 46 * @lock: serialization lock to marshal all requests 47 * @irq: the IRQ used for this device 48 * @regs: the regulators to power this device 49 * @fullscale: the current fullscale setting for the device 50 * @lpf: digital low pass filter setting for the device 51 * @divisor: base frequency divider: divides 8 or 1 kHz 52 * @calibration: the three signed 16-bit calibration settings that 53 * get written into the offset registers for each axis to compensate 54 * for DC offsets 55 * @trig: trigger for the MPU-3050 interrupt, if present 56 * @hw_irq_trigger: hardware interrupt trigger is in use 57 * @irq_actl: interrupt is active low 58 * @irq_latch: latched IRQ, this means that it is a level IRQ 59 * @irq_opendrain: the interrupt line shall be configured open drain 60 * @pending_fifo_footer: tells us if there is a pending footer in the FIFO 61 * that we have to read out first when handling the FIFO 62 * @hw_timestamp: latest hardware timestamp from the trigger IRQ, when in 63 * use 64 * @i2cmux: an I2C mux reflecting the fact that this sensor is a hub with 65 * a pass-through I2C interface coming out of it: this device needs to be 66 * powered up in order to reach devices on the other side of this mux 67 */ 68 struct mpu3050 { 69 struct device *dev; 70 struct iio_mount_matrix orientation; 71 struct regmap *map; 72 struct mutex lock; 73 int irq; 74 struct regulator_bulk_data regs[2]; 75 enum mpu3050_fullscale fullscale; 76 enum mpu3050_lpf lpf; 77 u8 divisor; 78 s16 calibration[3]; 79 struct iio_trigger *trig; 80 bool hw_irq_trigger; 81 bool irq_actl; 82 bool irq_latch; 83 bool irq_opendrain; 84 bool pending_fifo_footer; 85 s64 hw_timestamp; 86 struct i2c_mux_core *i2cmux; 87 }; 88 89 /* Probe called from different transports */ 90 int mpu3050_common_probe(struct device *dev, 91 struct regmap *map, 92 int irq, 93 const char *name); 94 int mpu3050_common_remove(struct device *dev); 95 96 /* PM ops */ 97 extern const struct dev_pm_ops mpu3050_dev_pm_ops; 98