1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Hardware monitoring driver for Maxim MAX16064
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2011 Ericsson AB.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/init.h>
11*4882a593Smuzhiyun #include <linux/err.h>
12*4882a593Smuzhiyun #include <linux/i2c.h>
13*4882a593Smuzhiyun #include "pmbus.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #define MAX16064_MFR_VOUT_PEAK 0xd4
16*4882a593Smuzhiyun #define MAX16064_MFR_TEMPERATURE_PEAK 0xd6
17*4882a593Smuzhiyun
max16064_read_word_data(struct i2c_client * client,int page,int phase,int reg)18*4882a593Smuzhiyun static int max16064_read_word_data(struct i2c_client *client, int page,
19*4882a593Smuzhiyun int phase, int reg)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun int ret;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun switch (reg) {
24*4882a593Smuzhiyun case PMBUS_VIRT_READ_VOUT_MAX:
25*4882a593Smuzhiyun ret = pmbus_read_word_data(client, page, phase,
26*4882a593Smuzhiyun MAX16064_MFR_VOUT_PEAK);
27*4882a593Smuzhiyun break;
28*4882a593Smuzhiyun case PMBUS_VIRT_READ_TEMP_MAX:
29*4882a593Smuzhiyun ret = pmbus_read_word_data(client, page, phase,
30*4882a593Smuzhiyun MAX16064_MFR_TEMPERATURE_PEAK);
31*4882a593Smuzhiyun break;
32*4882a593Smuzhiyun case PMBUS_VIRT_RESET_VOUT_HISTORY:
33*4882a593Smuzhiyun case PMBUS_VIRT_RESET_TEMP_HISTORY:
34*4882a593Smuzhiyun ret = 0;
35*4882a593Smuzhiyun break;
36*4882a593Smuzhiyun default:
37*4882a593Smuzhiyun ret = -ENODATA;
38*4882a593Smuzhiyun break;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun return ret;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
max16064_write_word_data(struct i2c_client * client,int page,int reg,u16 word)43*4882a593Smuzhiyun static int max16064_write_word_data(struct i2c_client *client, int page,
44*4882a593Smuzhiyun int reg, u16 word)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun int ret;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun switch (reg) {
49*4882a593Smuzhiyun case PMBUS_VIRT_RESET_VOUT_HISTORY:
50*4882a593Smuzhiyun ret = pmbus_write_word_data(client, page,
51*4882a593Smuzhiyun MAX16064_MFR_VOUT_PEAK, 0);
52*4882a593Smuzhiyun break;
53*4882a593Smuzhiyun case PMBUS_VIRT_RESET_TEMP_HISTORY:
54*4882a593Smuzhiyun ret = pmbus_write_word_data(client, page,
55*4882a593Smuzhiyun MAX16064_MFR_TEMPERATURE_PEAK,
56*4882a593Smuzhiyun 0xffff);
57*4882a593Smuzhiyun break;
58*4882a593Smuzhiyun default:
59*4882a593Smuzhiyun ret = -ENODATA;
60*4882a593Smuzhiyun break;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun return ret;
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun static struct pmbus_driver_info max16064_info = {
66*4882a593Smuzhiyun .pages = 4,
67*4882a593Smuzhiyun .format[PSC_VOLTAGE_IN] = direct,
68*4882a593Smuzhiyun .format[PSC_VOLTAGE_OUT] = direct,
69*4882a593Smuzhiyun .format[PSC_TEMPERATURE] = direct,
70*4882a593Smuzhiyun .m[PSC_VOLTAGE_IN] = 19995,
71*4882a593Smuzhiyun .b[PSC_VOLTAGE_IN] = 0,
72*4882a593Smuzhiyun .R[PSC_VOLTAGE_IN] = -1,
73*4882a593Smuzhiyun .m[PSC_VOLTAGE_OUT] = 19995,
74*4882a593Smuzhiyun .b[PSC_VOLTAGE_OUT] = 0,
75*4882a593Smuzhiyun .R[PSC_VOLTAGE_OUT] = -1,
76*4882a593Smuzhiyun .m[PSC_TEMPERATURE] = -7612,
77*4882a593Smuzhiyun .b[PSC_TEMPERATURE] = 335,
78*4882a593Smuzhiyun .R[PSC_TEMPERATURE] = -3,
79*4882a593Smuzhiyun .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP
80*4882a593Smuzhiyun | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP,
81*4882a593Smuzhiyun .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
82*4882a593Smuzhiyun .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
83*4882a593Smuzhiyun .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
84*4882a593Smuzhiyun .read_word_data = max16064_read_word_data,
85*4882a593Smuzhiyun .write_word_data = max16064_write_word_data,
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun
max16064_probe(struct i2c_client * client)88*4882a593Smuzhiyun static int max16064_probe(struct i2c_client *client)
89*4882a593Smuzhiyun {
90*4882a593Smuzhiyun return pmbus_do_probe(client, &max16064_info);
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun static const struct i2c_device_id max16064_id[] = {
94*4882a593Smuzhiyun {"max16064", 0},
95*4882a593Smuzhiyun {}
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, max16064_id);
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /* This is the driver that will be inserted */
101*4882a593Smuzhiyun static struct i2c_driver max16064_driver = {
102*4882a593Smuzhiyun .driver = {
103*4882a593Smuzhiyun .name = "max16064",
104*4882a593Smuzhiyun },
105*4882a593Smuzhiyun .probe_new = max16064_probe,
106*4882a593Smuzhiyun .remove = pmbus_do_remove,
107*4882a593Smuzhiyun .id_table = max16064_id,
108*4882a593Smuzhiyun };
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun module_i2c_driver(max16064_driver);
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun MODULE_AUTHOR("Guenter Roeck");
113*4882a593Smuzhiyun MODULE_DESCRIPTION("PMBus driver for Maxim MAX16064");
114*4882a593Smuzhiyun MODULE_LICENSE("GPL");
115