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[linux-2.6.git] / Documentation / hwmon / max8688
1 Kernel driver max8688
2 =====================
3
4 Supported chips:
5   * Maxim MAX8688
6     Prefix: 'max8688'
7     Addresses scanned: -
8     Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX8688.pdf
9
10 Author: Guenter Roeck <guenter.roeck@ericsson.com>
11
12
13 Description
14 -----------
15
16 This driver supports hardware montoring for Maxim MAX8688 Digital Power-Supply
17 Controller/Monitor with PMBus Interface.
18
19 The driver is a client driver to the core PMBus driver. Please see
20 Documentation/hwmon/pmbus for details on PMBus client drivers.
21
22
23 Usage Notes
24 -----------
25
26 This driver does not auto-detect devices. You will have to instantiate the
27 devices explicitly. Please see Documentation/i2c/instantiating-devices for
28 details.
29
30
31 Platform data support
32 ---------------------
33
34 The driver supports standard PMBus driver platform data.
35
36
37 Sysfs entries
38 -------------
39
40 The following attributes are supported. Limits are read-write; all other
41 attributes are read-only.
42
43 in1_label               "vout1"
44 in1_input               Measured voltage. From READ_VOUT register.
45 in1_min                 Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
46 in1_max                 Maximum voltage. From VOUT_OV_WARN_LIMIT register.
47 in1_lcrit               Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
48 in1_crit                Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
49 in1_min_alarm           Voltage low alarm. From VOLTAGE_UV_WARNING status.
50 in1_max_alarm           Voltage high alarm. From VOLTAGE_OV_WARNING status.
51 in1_lcrit_alarm         Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
52 in1_crit_alarm          Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
53 in1_highest             Historical maximum voltage.
54 in1_reset_history       Write any value to reset history.
55
56 curr1_label             "iout1"
57 curr1_input             Measured current. From READ_IOUT register.
58 curr1_max               Maximum current. From IOUT_OC_WARN_LIMIT register.
59 curr1_crit              Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
60 curr1_max_alarm         Current high alarm. From IOUT_OC_WARN_LIMIT register.
61 curr1_crit_alarm        Current critical high alarm. From IOUT_OC_FAULT status.
62 curr1_highest           Historical maximum current.
63 curr1_reset_history     Write any value to reset history.
64
65 temp1_input             Measured temperature. From READ_TEMPERATURE_1 register.
66 temp1_max               Maximum temperature. From OT_WARN_LIMIT register.
67 temp1_crit              Critical high temperature. From OT_FAULT_LIMIT register.
68 temp1_max_alarm         Chip temperature high alarm. Set by comparing
69                         READ_TEMPERATURE_1 with OT_WARN_LIMIT if TEMP_OT_WARNING
70                         status is set.
71 temp1_crit_alarm        Chip temperature critical high alarm. Set by comparing
72                         READ_TEMPERATURE_1 with OT_FAULT_LIMIT if TEMP_OT_FAULT
73                         status is set.
74 temp1_highest           Historical maximum temperature.
75 temp1_reset_history     Write any value to reset history.