1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (C) 2025 InvenSense, Inc. */
3
4 #include <linux/err.h>
5 #include <linux/mod_devicetable.h>
6 #include <linux/module.h>
7 #include <linux/regmap.h>
8
9 #include <linux/i3c/device.h>
10 #include <linux/i3c/master.h>
11
12 #include "inv_icm45600.h"
13
14 static const struct regmap_config inv_icm45600_regmap_config = {
15 .reg_bits = 8,
16 .val_bits = 8,
17 };
18
19 static const struct i3c_device_id inv_icm45600_i3c_ids[] = {
20 I3C_DEVICE_EXTRA_INFO(0x0235, 0x0000, 0x0011, (void *)NULL),
21 I3C_DEVICE_EXTRA_INFO(0x0235, 0x0000, 0x0084, (void *)NULL),
22 { /* sentinel */ }
23 };
24 MODULE_DEVICE_TABLE(i3c, inv_icm45600_i3c_ids);
25
26 static const struct inv_icm45600_chip_info *i3c_chip_info[] = {
27 &inv_icm45605_chip_info,
28 &inv_icm45606_chip_info,
29 &inv_icm45608_chip_info,
30 &inv_icm45634_chip_info,
31 &inv_icm45686_chip_info,
32 &inv_icm45687_chip_info,
33 &inv_icm45688p_chip_info,
34 &inv_icm45689_chip_info,
35 };
36
inv_icm45600_i3c_probe(struct i3c_device * i3cdev)37 static int inv_icm45600_i3c_probe(struct i3c_device *i3cdev)
38 {
39 int ret;
40 unsigned int whoami;
41 struct regmap *regmap;
42 const int nb_chip = ARRAY_SIZE(i3c_chip_info);
43 int chip;
44
45 regmap = devm_regmap_init_i3c(i3cdev, &inv_icm45600_regmap_config);
46 if (IS_ERR(regmap))
47 return dev_err_probe(&i3cdev->dev, PTR_ERR(regmap),
48 "Failed to register i3c regmap %ld\n", PTR_ERR(regmap));
49
50 ret = regmap_read(regmap, INV_ICM45600_REG_WHOAMI, &whoami);
51 if (ret)
52 return dev_err_probe(&i3cdev->dev, ret, "Failed to read part id %d\n", whoami);
53
54 for (chip = 0; chip < nb_chip; chip++) {
55 if (whoami == i3c_chip_info[chip]->whoami)
56 break;
57 }
58
59 if (chip == nb_chip)
60 return dev_err_probe(&i3cdev->dev, -ENODEV,
61 "Failed to match part id %d\n", whoami);
62
63 return inv_icm45600_core_probe(regmap, i3c_chip_info[chip], false, NULL);
64 }
65
66 static struct i3c_driver inv_icm45600_driver = {
67 .driver = {
68 .name = "inv_icm45600_i3c",
69 .pm = pm_sleep_ptr(&inv_icm45600_pm_ops),
70 },
71 .probe = inv_icm45600_i3c_probe,
72 .id_table = inv_icm45600_i3c_ids,
73 };
74 module_i3c_driver(inv_icm45600_driver);
75
76 MODULE_AUTHOR("Remi Buisson <remi.buisson@tdk.com>");
77 MODULE_DESCRIPTION("InvenSense ICM-456xx i3c driver");
78 MODULE_LICENSE("GPL");
79 MODULE_IMPORT_NS("IIO_ICM45600");
80