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Diffstat (limited to 'drivers/hwmon/max34440.c')
-rw-r--r--drivers/hwmon/max34440.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/hwmon/max34440.c b/drivers/hwmon/max34440.c
new file mode 100644
index 000000000000..992b701b4c5e
--- /dev/null
+++ b/drivers/hwmon/max34440.c
@@ -0,0 +1,199 @@
1/*
2 * Hardware monitoring driver for Maxim MAX34440/MAX34441
3 *
4 * Copyright (c) 2011 Ericsson AB.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/err.h>
25#include <linux/i2c.h>
26#include "pmbus.h"
27
28enum chips { max34440, max34441 };
29
30#define MAX34440_STATUS_OC_WARN (1 << 0)
31#define MAX34440_STATUS_OC_FAULT (1 << 1)
32#define MAX34440_STATUS_OT_FAULT (1 << 5)
33#define MAX34440_STATUS_OT_WARN (1 << 6)
34
35static int max34440_get_status(struct i2c_client *client, int page, int reg)
36{
37 int ret;
38 int mfg_status;
39
40 ret = pmbus_set_page(client, page);
41 if (ret < 0)
42 return ret;
43
44 switch (reg) {
45 case PMBUS_STATUS_IOUT:
46 mfg_status = pmbus_read_word_data(client, 0,
47 PMBUS_STATUS_MFR_SPECIFIC);
48 if (mfg_status < 0)
49 return mfg_status;
50 if (mfg_status & MAX34440_STATUS_OC_WARN)
51 ret |= PB_IOUT_OC_WARNING;
52 if (mfg_status & MAX34440_STATUS_OC_FAULT)
53 ret |= PB_IOUT_OC_FAULT;
54 break;
55 case PMBUS_STATUS_TEMPERATURE:
56 mfg_status = pmbus_read_word_data(client, 0,
57 PMBUS_STATUS_MFR_SPECIFIC);
58 if (mfg_status < 0)
59 return mfg_status;
60 if (mfg_status & MAX34440_STATUS_OT_WARN)
61 ret |= PB_TEMP_OT_WARNING;
62 if (mfg_status & MAX34440_STATUS_OT_FAULT)
63 ret |= PB_TEMP_OT_FAULT;
64 break;
65 default:
66 ret = -ENODATA;
67 break;
68 }
69 return ret;
70}
71
72static struct pmbus_driver_info max34440_info[] = {
73 [max34440] = {
74 .pages = 14,
75 .direct[PSC_VOLTAGE_IN] = true,
76 .direct[PSC_VOLTAGE_OUT] = true,
77 .direct[PSC_TEMPERATURE] = true,
78 .direct[PSC_CURRENT_OUT] = true,
79 .m[PSC_VOLTAGE_IN] = 1,
80 .b[PSC_VOLTAGE_IN] = 0,
81 .R[PSC_VOLTAGE_IN] = 3, /* R = 0 in datasheet reflects mV */
82 .m[PSC_VOLTAGE_OUT] = 1,
83 .b[PSC_VOLTAGE_OUT] = 0,
84 .R[PSC_VOLTAGE_OUT] = 3, /* R = 0 in datasheet reflects mV */
85 .m[PSC_CURRENT_OUT] = 1,
86 .b[PSC_CURRENT_OUT] = 0,
87 .R[PSC_CURRENT_OUT] = 3, /* R = 0 in datasheet reflects mA */
88 .m[PSC_TEMPERATURE] = 1,
89 .b[PSC_TEMPERATURE] = 0,
90 .R[PSC_TEMPERATURE] = 2,
91 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
92 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
93 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
94 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
95 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
96 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
97 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
98 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
99 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
100 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
101 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
102 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
103 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
104 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
105 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
106 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
107 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
108 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
109 .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
110 .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
111 .get_status = max34440_get_status,
112 },
113 [max34441] = {
114 .pages = 12,
115 .direct[PSC_VOLTAGE_IN] = true,
116 .direct[PSC_VOLTAGE_OUT] = true,
117 .direct[PSC_TEMPERATURE] = true,
118 .direct[PSC_CURRENT_OUT] = true,
119 .direct[PSC_FAN] = true,
120 .m[PSC_VOLTAGE_IN] = 1,
121 .b[PSC_VOLTAGE_IN] = 0,
122 .R[PSC_VOLTAGE_IN] = 3,
123 .m[PSC_VOLTAGE_OUT] = 1,
124 .b[PSC_VOLTAGE_OUT] = 0,
125 .R[PSC_VOLTAGE_OUT] = 3,
126 .m[PSC_CURRENT_OUT] = 1,
127 .b[PSC_CURRENT_OUT] = 0,
128 .R[PSC_CURRENT_OUT] = 3,
129 .m[PSC_TEMPERATURE] = 1,
130 .b[PSC_TEMPERATURE] = 0,
131 .R[PSC_TEMPERATURE] = 2,
132 .m[PSC_FAN] = 1,
133 .b[PSC_FAN] = 0,
134 .R[PSC_FAN] = 0,
135 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
136 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
137 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
138 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
139 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
140 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
141 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
142 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
143 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
144 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
145 .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
146 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
147 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
148 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
149 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
150 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
151 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
152 .get_status = max34440_get_status,
153 },
154};
155
156static int max34440_probe(struct i2c_client *client,
157 const struct i2c_device_id *id)
158{
159 return pmbus_do_probe(client, id, &max34440_info[id->driver_data]);
160}
161
162static int max34440_remove(struct i2c_client *client)
163{
164 return pmbus_do_remove(client);
165}
166
167static const struct i2c_device_id max34440_id[] = {
168 {"max34440", max34440},
169 {"max34441", max34441},
170 {}
171};
172
173MODULE_DEVICE_TABLE(i2c, max34440_id);
174
175/* This is the driver that will be inserted */
176static struct i2c_driver max34440_driver = {
177 .driver = {
178 .name = "max34440",
179 },
180 .probe = max34440_probe,
181 .remove = max34440_remove,
182 .id_table = max34440_id,
183};
184
185static int __init max34440_init(void)
186{
187 return i2c_add_driver(&max34440_driver);
188}
189
190static void __exit max34440_exit(void)
191{
192 i2c_del_driver(&max34440_driver);
193}
194
195MODULE_AUTHOR("Guenter Roeck");
196MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
197MODULE_LICENSE("GPL");
198module_init(max34440_init);
199module_exit(max34440_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-27 07:33:28 -0500