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
inv_icm42600_spi_bus_setup(struct inv_icm42600_state * st)16 static 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(st->map, INV_ICM42600_REG_INTF_CONFIG6,
26 INV_ICM42600_INTF_CONFIG6_MASK, val);
27 if (ret)
28 return ret;
29
30 ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
31 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);
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(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(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
inv_icm42600_probe(struct spi_device * spi)51 static 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(&spi->dev);
58 if (!match)
59 return -EINVAL;
60 chip = (uintptr_t)match;
61
62 regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config);
63 if (IS_ERR(regmap))
64 return PTR_ERR(regmap);
65
66 return inv_icm42600_core_probe(regmap, chip, spi->irq,
67 inv_icm42600_spi_bus_setup);
68 }
69
70 static const struct of_device_id inv_icm42600_of_matches[] = {
71 {
72 .compatible = "invensense,icm42600",
73 .data = (void *)INV_CHIP_ICM42600,
74 }, {
75 .compatible = "invensense,icm42602",
76 .data = (void *)INV_CHIP_ICM42602,
77 }, {
78 .compatible = "invensense,icm42605",
79 .data = (void *)INV_CHIP_ICM42605,
80 }, {
81 .compatible = "invensense,icm42622",
82 .data = (void *)INV_CHIP_ICM42622,
83 },
84 {}
85 };
86 MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
87
88 static struct spi_driver inv_icm42600_driver = {
89 .driver = {
90 .name = "inv-icm42600-spi",
91 .of_match_table = inv_icm42600_of_matches,
92 .pm = &inv_icm42600_pm_ops,
93 },
94 .probe = inv_icm42600_probe,
95 };
96 module_spi_driver(inv_icm42600_driver);
97
98 MODULE_AUTHOR("InvenSense, Inc.");
99 MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver");
100 MODULE_LICENSE("GPL");
101