1 /*
2 * Copyright (C) 2015 Intel Corporation Inc.
3 *
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 */
13 #include <linux/module.h>
14 #include <linux/acpi.h>
15 #include <linux/spi/spi.h>
16 #include <linux/regmap.h>
17 #include <linux/iio/iio.h>
18 #include "inv_mpu_iio.h"
19 
20 static const struct regmap_config inv_mpu_regmap_config = {
21 	.reg_bits = 8,
22 	.val_bits = 8,
23 };
24 
25 static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
26 {
27 	struct inv_mpu6050_state *st = iio_priv(indio_dev);
28 	int ret = 0;
29 
30 	ret = inv_mpu6050_set_power_itg(st, true);
31 	if (ret)
32 		return ret;
33 
34 	ret = regmap_write(st->map, INV_MPU6050_REG_USER_CTRL,
35 			   INV_MPU6050_BIT_I2C_IF_DIS);
36 	if (ret) {
37 		inv_mpu6050_set_power_itg(st, false);
38 		return ret;
39 	}
40 
41 	return inv_mpu6050_set_power_itg(st, false);
42 }
43 
44 static int inv_mpu_probe(struct spi_device *spi)
45 {
46 	struct regmap *regmap;
47 	const struct spi_device_id *id = spi_get_device_id(spi);
48 	const char *name = id ? id->name : NULL;
49 
50 	regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
51 	if (IS_ERR(regmap)) {
52 		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
53 			(int)PTR_ERR(regmap));
54 		return PTR_ERR(regmap);
55 	}
56 
57 	return inv_mpu_core_probe(regmap, spi->irq, name,
58 				  inv_mpu_i2c_disable, id->driver_data);
59 }
60 
61 static int inv_mpu_remove(struct spi_device *spi)
62 {
63 	return inv_mpu_core_remove(&spi->dev);
64 }
65 
66 /*
67  * device id table is used to identify what device can be
68  * supported by this driver
69  */
70 static const struct spi_device_id inv_mpu_id[] = {
71 	{"mpu6000", INV_MPU6000},
72 	{}
73 };
74 
75 MODULE_DEVICE_TABLE(spi, inv_mpu_id);
76 
77 static const struct acpi_device_id inv_acpi_match[] = {
78 	{"INVN6000", 0},
79 	{ },
80 };
81 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
82 
83 static struct spi_driver inv_mpu_driver = {
84 	.probe		=	inv_mpu_probe,
85 	.remove		=	inv_mpu_remove,
86 	.id_table	=	inv_mpu_id,
87 	.driver = {
88 		.acpi_match_table = ACPI_PTR(inv_acpi_match),
89 		.name	=	"inv-mpu6000-spi",
90 		.pm     =       &inv_mpu_pmops,
91 	},
92 };
93 
94 module_spi_driver(inv_mpu_driver);
95 
96 MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
97 MODULE_DESCRIPTION("Invensense device MPU6000 driver");
98 MODULE_LICENSE("GPL");
99