1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2020 InvenSense, Inc.
4 */
5
6#include <linux/kernel.h>
7#include <linux/device.h>
8#include <linux/module.h>
9#include <linux/mod_devicetable.h>
10#include <linux/spi/spi.h>
11#include <linux/regmap.h>
12#include <linux/property.h>
13
14#include "inv_icm42600.h"
15
16static int inv_icm42600_spi_bus_setup(struct inv_icm42600_state *st)
17{
18 unsigned int mask, val;
19 int ret;
20
21 /* setup interface registers */
22 val = INV_ICM42600_INTF_CONFIG6_I3C_EN |
23 INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN |
24 INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN;
25 ret = regmap_update_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG6,
26 INV_ICM42600_INTF_CONFIG6_MASK, val);
27 if (ret)
28 return ret;
29
30 ret = regmap_clear_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG4,
31 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY);
32 if (ret)
33 return ret;
34
35 /* set slew rates for I2C and SPI */
36 mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
37 INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
38 val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_20_60NS) |
39 INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_INF_2NS);
40 ret = regmap_update_bits(map: st->map, INV_ICM42600_REG_DRIVE_CONFIG,
41 mask, val);
42 if (ret)
43 return ret;
44
45 /* disable i2c bus */
46 return regmap_update_bits(map: st->map, INV_ICM42600_REG_INTF_CONFIG0,
47 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
48 INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS);
49}
50
51static int inv_icm42600_probe(struct spi_device *spi)
52{
53 const void *match;
54 enum inv_icm42600_chip chip;
55 struct regmap *regmap;
56
57 match = device_get_match_data(dev: &spi->dev);
58 if (!match)
59 return -EINVAL;
60 chip = (uintptr_t)match;
61
62 /* use SPI specific regmap */
63 regmap = devm_regmap_init_spi(spi, &inv_icm42600_spi_regmap_config);
64 if (IS_ERR(ptr: regmap))
65 return PTR_ERR(ptr: regmap);
66
67 return inv_icm42600_core_probe(regmap, chip, bus_setup: inv_icm42600_spi_bus_setup);
68}
69
70/*
71 * device id table is used to identify what device can be
72 * supported by this driver
73 */
74static const struct spi_device_id inv_icm42600_id[] = {
75 { "icm42600", INV_CHIP_ICM42600 },
76 { "icm42602", INV_CHIP_ICM42602 },
77 { "icm42605", INV_CHIP_ICM42605 },
78 { "icm42686", INV_CHIP_ICM42686 },
79 { "icm42622", INV_CHIP_ICM42622 },
80 { "icm42688", INV_CHIP_ICM42688 },
81 { "icm42631", INV_CHIP_ICM42631 },
82 { }
83};
84MODULE_DEVICE_TABLE(spi, inv_icm42600_id);
85
86static const struct of_device_id inv_icm42600_of_matches[] = {
87 {
88 .compatible = "invensense,icm42600",
89 .data = (void *)INV_CHIP_ICM42600,
90 }, {
91 .compatible = "invensense,icm42602",
92 .data = (void *)INV_CHIP_ICM42602,
93 }, {
94 .compatible = "invensense,icm42605",
95 .data = (void *)INV_CHIP_ICM42605,
96 }, {
97 .compatible = "invensense,icm42686",
98 .data = (void *)INV_CHIP_ICM42686,
99 }, {
100 .compatible = "invensense,icm42622",
101 .data = (void *)INV_CHIP_ICM42622,
102 }, {
103 .compatible = "invensense,icm42688",
104 .data = (void *)INV_CHIP_ICM42688,
105 }, {
106 .compatible = "invensense,icm42631",
107 .data = (void *)INV_CHIP_ICM42631,
108 },
109 { }
110};
111MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
112
113static struct spi_driver inv_icm42600_driver = {
114 .driver = {
115 .name = "inv-icm42600-spi",
116 .of_match_table = inv_icm42600_of_matches,
117 .pm = pm_ptr(&inv_icm42600_pm_ops),
118 },
119 .id_table = inv_icm42600_id,
120 .probe = inv_icm42600_probe,
121};
122module_spi_driver(inv_icm42600_driver);
123
124MODULE_AUTHOR("InvenSense, Inc.");
125MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver");
126MODULE_LICENSE("GPL");
127MODULE_IMPORT_NS("IIO_ICM42600");
128

source code of linux/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c