1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Hardware monitoring driver for Maxim MAX16064
5 * Copyright (c) 2011 Ericsson AB.
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/err.h>
12 #include <linux/i2c.h>
15 #define MAX16064_MFR_VOUT_PEAK 0xd4
16 #define MAX16064_MFR_TEMPERATURE_PEAK 0xd6
18 static int max16064_read_word_data(struct i2c_client *client, int page, int reg)
23 case PMBUS_VIRT_READ_VOUT_MAX:
24 ret = pmbus_read_word_data(client, page,
25 MAX16064_MFR_VOUT_PEAK);
27 case PMBUS_VIRT_READ_TEMP_MAX:
28 ret = pmbus_read_word_data(client, page,
29 MAX16064_MFR_TEMPERATURE_PEAK);
31 case PMBUS_VIRT_RESET_VOUT_HISTORY:
32 case PMBUS_VIRT_RESET_TEMP_HISTORY:
42 static int max16064_write_word_data(struct i2c_client *client, int page,
48 case PMBUS_VIRT_RESET_VOUT_HISTORY:
49 ret = pmbus_write_word_data(client, page,
50 MAX16064_MFR_VOUT_PEAK, 0);
52 case PMBUS_VIRT_RESET_TEMP_HISTORY:
53 ret = pmbus_write_word_data(client, page,
54 MAX16064_MFR_TEMPERATURE_PEAK,
64 static struct pmbus_driver_info max16064_info = {
66 .format[PSC_VOLTAGE_IN] = direct,
67 .format[PSC_VOLTAGE_OUT] = direct,
68 .format[PSC_TEMPERATURE] = direct,
69 .m[PSC_VOLTAGE_IN] = 19995,
70 .b[PSC_VOLTAGE_IN] = 0,
71 .R[PSC_VOLTAGE_IN] = -1,
72 .m[PSC_VOLTAGE_OUT] = 19995,
73 .b[PSC_VOLTAGE_OUT] = 0,
74 .R[PSC_VOLTAGE_OUT] = -1,
75 .m[PSC_TEMPERATURE] = -7612,
76 .b[PSC_TEMPERATURE] = 335,
77 .R[PSC_TEMPERATURE] = -3,
78 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP
79 | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP,
80 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
81 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
82 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
83 .read_word_data = max16064_read_word_data,
84 .write_word_data = max16064_write_word_data,
87 static int max16064_probe(struct i2c_client *client,
88 const struct i2c_device_id *id)
90 return pmbus_do_probe(client, id, &max16064_info);
93 static const struct i2c_device_id max16064_id[] = {
98 MODULE_DEVICE_TABLE(i2c, max16064_id);
100 /* This is the driver that will be inserted */
101 static struct i2c_driver max16064_driver = {
105 .probe = max16064_probe,
106 .remove = pmbus_do_remove,
107 .id_table = max16064_id,
110 module_i2c_driver(max16064_driver);
112 MODULE_AUTHOR("Guenter Roeck");
113 MODULE_DESCRIPTION("PMBus driver for Maxim MAX16064");
114 MODULE_LICENSE("GPL");