1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 Intel Corporation Inc.
4 */
5 #include <linux/module.h>
6 #include <linux/acpi.h>
7 #include <linux/spi/spi.h>
8 #include <linux/regmap.h>
9 #include <linux/iio/iio.h>
10 #include "inv_mpu_iio.h"
11 
12 static const struct regmap_config inv_mpu_regmap_config = {
13 	.reg_bits = 8,
14 	.val_bits = 8,
15 };
16 
17 static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
18 {
19 	struct inv_mpu6050_state *st = iio_priv(indio_dev);
20 	int ret = 0;
21 
22 	ret = inv_mpu6050_set_power_itg(st, true);
23 	if (ret)
24 		return ret;
25 
26 	if (st->reg->i2c_if) {
27 		ret = regmap_write(st->map, st->reg->i2c_if,
28 				   INV_ICM20602_BIT_I2C_IF_DIS);
29 	} else {
30 		st->chip_config.user_ctrl |= INV_MPU6050_BIT_I2C_IF_DIS;
31 		ret = regmap_write(st->map, st->reg->user_ctrl,
32 				   st->chip_config.user_ctrl);
33 	}
34 	if (ret) {
35 		inv_mpu6050_set_power_itg(st, false);
36 		return ret;
37 	}
38 
39 	return inv_mpu6050_set_power_itg(st, false);
40 }
41 
42 static int inv_mpu_probe(struct spi_device *spi)
43 {
44 	struct regmap *regmap;
45 	const struct spi_device_id *spi_id;
46 	const struct acpi_device_id *acpi_id;
47 	const char *name = NULL;
48 	enum inv_devices chip_type;
49 
50 	if ((spi_id = spi_get_device_id(spi))) {
51 		chip_type = (enum inv_devices)spi_id->driver_data;
52 		name = spi_id->name;
53 	} else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) {
54 		chip_type = (enum inv_devices)acpi_id->driver_data;
55 	} else {
56 		return -ENODEV;
57 	}
58 
59 	regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
60 	if (IS_ERR(regmap)) {
61 		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
62 			(int)PTR_ERR(regmap));
63 		return PTR_ERR(regmap);
64 	}
65 
66 	return inv_mpu_core_probe(regmap, spi->irq, name,
67 				  inv_mpu_i2c_disable, chip_type);
68 }
69 
70 /*
71  * device id table is used to identify what device can be
72  * supported by this driver
73  */
74 static const struct spi_device_id inv_mpu_id[] = {
75 	{"mpu6000", INV_MPU6000},
76 	{"mpu6500", INV_MPU6500},
77 	{"mpu9250", INV_MPU9250},
78 	{"mpu9255", INV_MPU9255},
79 	{"icm20608", INV_ICM20608},
80 	{"icm20602", INV_ICM20602},
81 	{}
82 };
83 
84 MODULE_DEVICE_TABLE(spi, inv_mpu_id);
85 
86 static const struct acpi_device_id inv_acpi_match[] = {
87 	{"INVN6000", INV_MPU6000},
88 	{ },
89 };
90 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
91 
92 static struct spi_driver inv_mpu_driver = {
93 	.probe		=	inv_mpu_probe,
94 	.id_table	=	inv_mpu_id,
95 	.driver = {
96 		.acpi_match_table = ACPI_PTR(inv_acpi_match),
97 		.name	=	"inv-mpu6000-spi",
98 		.pm     =       &inv_mpu_pmops,
99 	},
100 };
101 
102 module_spi_driver(inv_mpu_driver);
103 
104 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
105 MODULE_DESCRIPTION("Invensense device MPU6000 driver");
106 MODULE_LICENSE("GPL");
107