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 ; |
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 | void mpu3050_common_remove(struct device *dev); |
95 | |
96 | /* PM ops */ |
97 | extern const struct dev_pm_ops mpu3050_dev_pm_ops; |
98 | |