summaryrefslogtreecommitdiff
path: root/drivers/hwmon/pmbus/max16064.c
blob: 5cfe20f1e03003082ddcf4f88afacbee67556a77 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*
 * Hardware monitoring driver for Maxim MAX16064
 *
 * Copyright (c) 2011 Ericsson AB.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include "pmbus.h"

#define MAX16064_MFR_VOUT_PEAK		0xd4
#define MAX16064_MFR_TEMPERATURE_PEAK	0xd6

static int max16064_read_word_data(struct i2c_client *client, int page, int reg)
{
	int ret;

	switch (reg) {
	case PMBUS_VIRT_READ_VOUT_MAX:
		ret = pmbus_read_word_data(client, page,
					   MAX16064_MFR_VOUT_PEAK);
		break;
	case PMBUS_VIRT_READ_TEMP_MAX:
		ret = pmbus_read_word_data(client, page,
					   MAX16064_MFR_TEMPERATURE_PEAK);
		break;
	case PMBUS_VIRT_RESET_VOUT_HISTORY:
	case PMBUS_VIRT_RESET_TEMP_HISTORY:
		ret = 0;
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static int max16064_write_word_data(struct i2c_client *client, int page,
				    int reg, u16 word)
{
	int ret;

	switch (reg) {
	case PMBUS_VIRT_RESET_VOUT_HISTORY:
		ret = pmbus_write_word_data(client, page,
					    MAX16064_MFR_VOUT_PEAK, 0);
		break;
	case PMBUS_VIRT_RESET_TEMP_HISTORY:
		ret = pmbus_write_word_data(client, page,
					    MAX16064_MFR_TEMPERATURE_PEAK,
					    0xffff);
		break;
	default:
		ret = -ENODATA;
		break;
	}
	return ret;
}

static struct pmbus_driver_info max16064_info = {
	.pages = 4,
	.format[PSC_VOLTAGE_IN] = direct,
	.format[PSC_VOLTAGE_OUT] = direct,
	.format[PSC_TEMPERATURE] = direct,
	.m[PSC_VOLTAGE_IN] = 19995,
	.b[PSC_VOLTAGE_IN] = 0,
	.R[PSC_VOLTAGE_IN] = -1,
	.m[PSC_VOLTAGE_OUT] = 19995,
	.b[PSC_VOLTAGE_OUT] = 0,
	.R[PSC_VOLTAGE_OUT] = -1,
	.m[PSC_TEMPERATURE] = -7612,
	.b[PSC_TEMPERATURE] = 335,
	.R[PSC_TEMPERATURE] = -3,
	.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP
		| PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP,
	.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
	.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
	.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
	.read_word_data = max16064_read_word_data,
	.write_word_data = max16064_write_word_data,
};

static int max16064_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	return pmbus_do_probe(client, id, &max16064_info);
}

static int max16064_remove(struct i2c_client *client)
{
	pmbus_do_remove(client);
	return 0;
}

static const struct i2c_device_id max16064_id[] = {
	{"max16064", 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, max16064_id);

/* This is the driver that will be inserted */
static struct i2c_driver max16064_driver = {
	.driver = {
		   .name = "max16064",
		   },
	.probe = max16064_probe,
	.remove = max16064_remove,
	.id_table = max16064_id,
};

module_i2c_driver(max16064_driver);

MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Maxim MAX16064");
MODULE_LICENSE("GPL");