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