1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
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
14#define PM6764TR_PMBUS_READ_VOUT	0xD4
15
16static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg)
17{
18	int ret;
19
20	switch (reg) {
21	case PMBUS_VIRT_READ_VMON:
22		ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT);
23		break;
24	default:
25		ret = -ENODATA;
26		break;
27	}
28	return ret;
29}
30
31static struct pmbus_driver_info pm6764tr_info = {
32	.pages = 1,
33	.format[PSC_VOLTAGE_IN] = linear,
34	.format[PSC_VOLTAGE_OUT] = vid,
35	.format[PSC_TEMPERATURE] = linear,
36	.format[PSC_CURRENT_OUT] = linear,
37	.format[PSC_POWER] = linear,
38	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |  PMBUS_HAVE_PIN |
39	    PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
40		PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
41		PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
42	.read_word_data = pm6764tr_read_word_data,
43};
44
45static int pm6764tr_probe(struct i2c_client *client)
46{
47	return pmbus_do_probe(client, &pm6764tr_info);
48}
49
50static const struct i2c_device_id pm6764tr_id[] = {
51	{"pm6764tr", 0},
52	{}
53};
54MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
55
56static const struct of_device_id __maybe_unused pm6764tr_of_match[] = {
57	{.compatible = "st,pm6764tr"},
58	{}
59};
60
61/* This is the driver that will be inserted */
62static struct i2c_driver pm6764tr_driver = {
63	.driver = {
64		   .name = "pm6764tr",
65		   .of_match_table = of_match_ptr(pm6764tr_of_match),
66		   },
67	.probe = pm6764tr_probe,
68	.id_table = pm6764tr_id,
69};
70
71module_i2c_driver(pm6764tr_driver);
72
73MODULE_AUTHOR("Charles Hsu");
74MODULE_DESCRIPTION("PMBus driver for  ST PM6764TR");
75MODULE_LICENSE("GPL");
76MODULE_IMPORT_NS(PMBUS);
77