1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Hardware monitoring driver for TEXAS TPS546D24 buck converter
4 */
5
6#include <linux/err.h>
7#include <linux/i2c.h>
8#include <linux/init.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/pmbus.h>
12#include "pmbus.h"
13
14static struct pmbus_driver_info tps546d24_info = {
15	.pages = 1,
16	.format[PSC_VOLTAGE_IN] = linear,
17	.format[PSC_VOLTAGE_OUT] = linear,
18	.format[PSC_TEMPERATURE] = linear,
19	.format[PSC_CURRENT_OUT] = linear,
20	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
21			| PMBUS_HAVE_IOUT | PMBUS_HAVE_VOUT
22			| PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT
23			| PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
24};
25
26static int tps546d24_probe(struct i2c_client *client)
27{
28	int reg;
29
30	reg = i2c_smbus_read_byte_data(client, PMBUS_VOUT_MODE);
31	if (reg < 0)
32		return reg;
33
34	if (reg & 0x80) {
35		int err;
36
37		err = i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, reg & 0x7f);
38		if (err < 0)
39			return err;
40	}
41	return pmbus_do_probe(client, &tps546d24_info);
42}
43
44static const struct i2c_device_id tps546d24_id[] = {
45	{"tps546d24", 0},
46	{}
47};
48MODULE_DEVICE_TABLE(i2c, tps546d24_id);
49
50static const struct of_device_id __maybe_unused tps546d24_of_match[] = {
51	{.compatible = "ti,tps546d24"},
52	{}
53};
54MODULE_DEVICE_TABLE(of, tps546d24_of_match);
55
56/* This is the driver that will be inserted */
57static struct i2c_driver tps546d24_driver = {
58	.driver = {
59		   .name = "tps546d24",
60		   .of_match_table = of_match_ptr(tps546d24_of_match),
61	   },
62	.probe = tps546d24_probe,
63	.id_table = tps546d24_id,
64};
65
66module_i2c_driver(tps546d24_driver);
67
68MODULE_AUTHOR("Duke Du <dukedu83@gmail.com>");
69MODULE_DESCRIPTION("PMBus driver for TI tps546d24");
70MODULE_LICENSE("GPL");
71MODULE_IMPORT_NS(PMBUS);
72