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