1 Kernel driver max8688 1 Kernel driver max8688
2 ===================== 2 =====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Maxim MAX8688 6 * Maxim MAX8688
7 7
8 Prefix: 'max8688' 8 Prefix: 'max8688'
9 9
10 Addresses scanned: - 10 Addresses scanned: -
11 11
12 Datasheet: http://datasheets.maxim-ic.com/ 12 Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX8688.pdf
13 13
14 Author: Guenter Roeck <linux@roeck-us.net> 14 Author: Guenter Roeck <linux@roeck-us.net>
15 15
16 16
17 Description 17 Description
18 ----------- 18 -----------
19 19
20 This driver supports hardware monitoring for M 20 This driver supports hardware monitoring for Maxim MAX8688 Digital Power-Supply
21 Controller/Monitor with PMBus Interface. 21 Controller/Monitor with PMBus Interface.
22 22
23 The driver is a client driver to the core PMBu 23 The driver is a client driver to the core PMBus driver. Please see
24 Documentation/hwmon/pmbus.rst for details on P 24 Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
25 25
26 26
27 Usage Notes 27 Usage Notes
28 ----------- 28 -----------
29 29
30 This driver does not auto-detect devices. You 30 This driver does not auto-detect devices. You will have to instantiate the
31 devices explicitly. Please see Documentation/i 31 devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
32 details. 32 details.
33 33
34 34
35 Platform data support 35 Platform data support
36 --------------------- 36 ---------------------
37 37
38 The driver supports standard PMBus driver plat 38 The driver supports standard PMBus driver platform data.
39 39
40 40
41 Sysfs entries 41 Sysfs entries
42 ------------- 42 -------------
43 43
44 The following attributes are supported. Limits 44 The following attributes are supported. Limits are read-write; all other
45 attributes are read-only. 45 attributes are read-only.
46 46
47 ======================= ====================== 47 ======================= ========================================================
48 in1_label "vout1" 48 in1_label "vout1"
49 in1_input Measured voltage. From 49 in1_input Measured voltage. From READ_VOUT register.
50 in1_min Minimum Voltage. From 50 in1_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
51 in1_max Maximum voltage. From 51 in1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
52 in1_lcrit Critical minimum Volta 52 in1_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
53 in1_crit Critical maximum volta 53 in1_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT
54 register. 54 register.
55 in1_min_alarm Voltage low alarm. Fro 55 in1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
56 in1_max_alarm Voltage high alarm. Fr 56 in1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
57 in1_lcrit_alarm Voltage critical low a 57 in1_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT
58 status. 58 status.
59 in1_crit_alarm Voltage critical high 59 in1_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT
60 status. 60 status.
61 in1_highest Historical maximum vol 61 in1_highest Historical maximum voltage.
62 in1_reset_history Write any value to res 62 in1_reset_history Write any value to reset history.
63 63
64 curr1_label "iout1" 64 curr1_label "iout1"
65 curr1_input Measured current. From 65 curr1_input Measured current. From READ_IOUT register.
66 curr1_max Maximum current. From 66 curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register.
67 curr1_crit Critical maximum curre 67 curr1_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT
68 register. 68 register.
69 curr1_max_alarm Current high alarm. Fr 69 curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register.
70 curr1_crit_alarm Current critical high 70 curr1_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
71 curr1_highest Historical maximum cur 71 curr1_highest Historical maximum current.
72 curr1_reset_history Write any value to res 72 curr1_reset_history Write any value to reset history.
73 73
74 temp1_input Measured temperature. 74 temp1_input Measured temperature. From READ_TEMPERATURE_1 register.
75 temp1_max Maximum temperature. F 75 temp1_max Maximum temperature. From OT_WARN_LIMIT register.
76 temp1_crit Critical high temperat 76 temp1_crit Critical high temperature. From OT_FAULT_LIMIT register.
77 temp1_max_alarm Chip temperature high 77 temp1_max_alarm Chip temperature high alarm. Set by comparing
78 READ_TEMPERATURE_1 wit 78 READ_TEMPERATURE_1 with OT_WARN_LIMIT if TEMP_OT_WARNING
79 status is set. 79 status is set.
80 temp1_crit_alarm Chip temperature criti 80 temp1_crit_alarm Chip temperature critical high alarm. Set by comparing
81 READ_TEMPERATURE_1 wit 81 READ_TEMPERATURE_1 with OT_FAULT_LIMIT if TEMP_OT_FAULT
82 status is set. 82 status is set.
83 temp1_highest Historical maximum tem 83 temp1_highest Historical maximum temperature.
84 temp1_reset_history Write any value to res 84 temp1_reset_history Write any value to reset history.
85 ======================= ====================== 85 ======================= ========================================================
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