inv_icm45600_i3c.c

 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
14static const struct regmap_config inv_icm45600_regmap_config = {
15	.reg_bits = 8,
16	.val_bits = 8,
17};
18
19static 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};
24MODULE_DEVICE_TABLE(i3c, inv_icm45600_i3c_ids);
25
26static 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
37static 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
66static 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};
74module_i3c_driver(inv_icm45600_driver);
75
76MODULE_AUTHOR("Remi Buisson <remi.buisson@tdk.com>");
77MODULE_DESCRIPTION("InvenSense ICM-456xx i3c driver");
78MODULE_LICENSE("GPL");
79MODULE_IMPORT_NS("IIO_ICM45600");