| /* 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); |
| int mpu3050_common_remove(struct device *dev); |
| |
| /* PM ops */ |
| extern const struct dev_pm_ops mpu3050_dev_pm_ops; |