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