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1 | .. SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | Kernel driver max15301 | |
4 | ====================== | |
5 | ||
6 | Supported chips: | |
7 | ||
8 | * Maxim MAX15301 | |
9 | ||
10 | Prefix: 'max15301', 'bmr461' | |
11 | ||
12 | Addresses scanned: - | |
13 | ||
14 | Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX15301.pdf | |
15 | ||
16 | Author: Erik Rosen <erik.rosen@metormote.com> | |
17 | ||
18 | ||
19 | Description | |
20 | ----------- | |
21 | ||
22 | This driver supports hardware monitoring for Maxim MAX15301 controller chip and | |
23 | compatible modules. | |
24 | ||
25 | The driver is a client driver to the core PMBus driver. Please see | |
26 | Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details | |
27 | on PMBus client drivers. | |
28 | ||
29 | ||
30 | Usage Notes | |
31 | ----------- | |
32 | ||
33 | This driver does not auto-detect devices. You will have to instantiate the | |
34 | devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for | |
35 | details. | |
36 | ||
37 | ||
38 | Platform data support | |
39 | --------------------- | |
40 | ||
41 | The driver supports standard PMBus driver platform data. | |
42 | ||
43 | ||
44 | Module parameters | |
45 | ----------------- | |
46 | ||
47 | delay | |
48 | ----- | |
49 | ||
50 | The controller requires a minimum interval between I2C bus accesses. | |
51 | The default interval is set to 100 us. For manual override, the driver | |
52 | provides a writeable module parameter, 'delay', which can be used to | |
53 | set the interval to a value between 0 and 65,535 microseconds. | |
54 | ||
55 | ||
56 | Sysfs entries | |
57 | ------------- | |
58 | ||
59 | The following attributes are supported. Limits are read-write; all other | |
60 | attributes are read-only. | |
61 | ||
62 | ======================= ======================================================== | |
63 | in1_label "vin" | |
64 | in1_input Measured input voltage. | |
65 | in1_lcrit Critical minimum input voltage. | |
66 | in1_crit Critical maximum input voltage. | |
67 | in1_lcrit_alarm Input voltage critical low alarm. | |
68 | in1_crit_alarm Input voltage critical high alarm. | |
69 | ||
70 | in2_label "vout1" | |
71 | in2_input Measured output voltage. | |
72 | in2_lcrit Critical minimum output Voltage. | |
73 | in2_crit Critical maximum output voltage. | |
74 | in2_lcrit_alarm Critical output voltage critical low alarm. | |
75 | in2_crit_alarm Critical output voltage critical high alarm. | |
76 | ||
77 | curr1_label "iout1" | |
78 | curr1_input Measured output current. | |
79 | curr1_crit Critical maximum output current. | |
80 | curr1_crit_alarm Output current critical high alarm. | |
81 | ||
82 | temp1_input Measured maximum temperature of all phases. | |
83 | temp1_max Maximum temperature limit. | |
84 | temp1_max_alarm High temperature alarm. | |
85 | temp1_crit Critical maximum temperature limit. | |
86 | temp1_crit_alarm Critical maximum temperature alarm. | |
87 | ======================= ======================================================== |