1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Hardware monitoring driver for Infineon IR38064
4 *
5 * Copyright (c) 2017 Google Inc
6 *
7 * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
8 * mode with exponent value -8 as direct mode with m=256/b=0/R=0.
9 *
10 * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
11 * this driver does not currently support them.
12 */
13
14#include <linux/err.h>
15#include <linux/i2c.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include "pmbus.h"
20
21static struct pmbus_driver_info ir38064_info = {
22	.pages = 1,
23	.format[PSC_VOLTAGE_IN] = linear,
24	.format[PSC_VOLTAGE_OUT] = direct,
25	.format[PSC_CURRENT_OUT] = linear,
26	.format[PSC_POWER] = linear,
27	.format[PSC_TEMPERATURE] = linear,
28	.m[PSC_VOLTAGE_OUT] = 256,
29	.b[PSC_VOLTAGE_OUT] = 0,
30	.R[PSC_VOLTAGE_OUT] = 0,
31	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
32	    | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
33	    | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
34	    | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
35	    | PMBUS_HAVE_POUT,
36};
37
38static int ir38064_probe(struct i2c_client *client)
39{
40	return pmbus_do_probe(client, &ir38064_info);
41}
42
43static const struct i2c_device_id ir38064_id[] = {
44	{"ir38064", 0},
45	{}
46};
47
48MODULE_DEVICE_TABLE(i2c, ir38064_id);
49
50/* This is the driver that will be inserted */
51static struct i2c_driver ir38064_driver = {
52	.driver = {
53		   .name = "ir38064",
54		   },
55	.probe_new = ir38064_probe,
56	.remove = pmbus_do_remove,
57	.id_table = ir38064_id,
58};
59
60module_i2c_driver(ir38064_driver);
61
62MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
63MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
64MODULE_LICENSE("GPL");
65