Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[platform/kernel/linux-starfive.git] / Documentation / hwmon / ltc2992.rst
1 .. SPDX-License-Identifier: GPL-2.0
2
3 Kernel driver ltc2992
4 =====================
5
6 Supported chips:
7   * Linear Technology LTC2992
8     Prefix: 'ltc2992'
9     Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2992.pdf
10
11 Author: Alexandru Tachici <alexandru.tachici@analog.com>
12
13
14 Description
15 -----------
16
17 This driver supports hardware monitoring for Linear Technology LTC2992 power monitor.
18
19 LTC2992 is a rail-to-rail system monitor that measures current,
20 voltage, and power of two supplies.
21
22 Two ADCs simultaneously measure each supply's current. A third ADC monitors
23 the input voltages and four auxiliary external voltages.
24
25
26 Sysfs entries
27 -------------
28
29 The following attributes are supported. Limits are read-write,
30 all other attributes are read-only.
31
32 in_reset_history        Reset all highest/lowest values.
33
34 inX_input               Measured voltage.
35 inX_lowest              Minimum measured voltage.
36 inX_highest             Maximum measured voltage.
37 inX_min                 Minimum voltage allowed.
38 inX_max                 Maximum voltage allowed.
39 inX_min_alarm           An undervoltage occurred. Cleared on read.
40 inX_max_alarm           An overvoltage occurred. Cleared on read.
41
42 currX_input             Measured current.
43 currX_lowest            Minimum measured current.
44 currX_highest           Maximum measured current.
45 currX_min               Minimum current allowed.
46 currX_max               Maximum current allowed.
47 currX_min_alarm         An undercurrent occurred. Cleared on read.
48 currX_max_alarm         An overcurrent occurred. Cleared on read.
49
50 powerX_input            Measured power.
51 powerX_input_lowest     Minimum measured voltage.
52 powerX_input_highest    Maximum measured voltage.
53 powerX_min              Minimum power.
54 powerX_max              Maximum power.
55 powerX_min_alarm        An underpower occurred. Cleared on read.
56 powerX_max_alarm        An overpower occurred. Cleared on read.