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1 | .. SPDX-License-Identifier: GPL-2.0-only |
2 | ||
3 | Kernel driver ina238 | |
4 | ==================== | |
5 | ||
6 | Supported chips: | |
7 | ||
8 | * Texas Instruments INA238 | |
9 | ||
10 | Prefix: 'ina238' | |
11 | ||
12 | Addresses: I2C 0x40 - 0x4f | |
13 | ||
14 | Datasheet: | |
15 | https://www.ti.com/lit/gpn/ina238 | |
16 | ||
17 | Author: Nathan Rossi <nathan.rossi@digi.com> | |
18 | ||
19 | Description | |
20 | ----------- | |
21 | ||
22 | The INA238 is a current shunt, power and temperature monitor with an I2C | |
23 | interface. It includes a number of programmable functions including alerts, | |
24 | conversion rate, sample averaging and selectable shunt voltage accuracy. | |
25 | ||
26 | The shunt value in micro-ohms can be set via platform data or device tree at | |
27 | compile-time or via the shunt_resistor attribute in sysfs at run-time. Please | |
28 | refer to the Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings | |
29 | if the device tree is used. | |
30 | ||
31 | Sysfs entries | |
32 | ------------- | |
33 | ||
34 | ======================= ======================================================= | |
35 | in0_input Shunt voltage (mV) | |
36 | in0_min Minimum shunt voltage threshold (mV) | |
37 | in0_min_alarm Minimum shunt voltage alarm | |
38 | in0_max Maximum shunt voltage threshold (mV) | |
39 | in0_max_alarm Maximum shunt voltage alarm | |
40 | ||
41 | in1_input Bus voltage (mV) | |
42 | in1_min Minimum bus voltage threshold (mV) | |
43 | in1_min_alarm Minimum shunt voltage alarm | |
44 | in1_max Maximum bus voltage threshold (mV) | |
45 | in1_max_alarm Maximum shunt voltage alarm | |
46 | ||
47 | power1_input Power measurement (uW) | |
48 | power1_max Maximum power threshold (uW) | |
49 | power1_max_alarm Maximum power alarm | |
50 | ||
51 | curr1_input Current measurement (mA) | |
52 | ||
53 | temp1_input Die temperature measurement (mC) | |
54 | temp1_max Maximum die temperature threshold (mC) | |
55 | temp1_max_alarm Maximum die temperature alarm | |
56 | ======================= ======================================================= |