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| author | Nathan Rossi <nathan.rossi@digi.com> | 2021-11-02 06:27:54 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2021-12-27 00:02:05 +0100 |
| commit | eacb52f010a80752e77a86aee9cb01f4864b0ca4 (patch) | |
| tree | 192e0661139571a8ee975665cd3fd87f6a377b30 /Documentation/hwmon/ina238.rst | |
| parent | dt-bindings: hwmon: ti,ina2xx: Add ti,shunt-gain property (diff) | |
| download | linux-eacb52f010a80752e77a86aee9cb01f4864b0ca4.tar.xz linux-eacb52f010a80752e77a86aee9cb01f4864b0ca4.zip | |
hwmon: Driver for Texas Instruments INA238
The INA238 is a I2C power monitor similar to other INA2xx devices,
providing shunt voltage, bus voltage, current, power and temperature
measurements.
Signed-off-by: Nathan Rossi <nathan.rossi@digi.com>
Link: https://lore.kernel.org/r/20211102052754.817220-3-nathan@nathanrossi.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/ina238.rst')
| -rw-r--r-- | Documentation/hwmon/ina238.rst | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/hwmon/ina238.rst b/Documentation/hwmon/ina238.rst new file mode 100644 index 000000000000..d9f479984420 --- /dev/null +++ b/Documentation/hwmon/ina238.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +Kernel driver ina238 +==================== + +Supported chips: + + * Texas Instruments INA238 + + Prefix: 'ina238' + + Addresses: I2C 0x40 - 0x4f + + Datasheet: + https://www.ti.com/lit/gpn/ina238 + +Author: Nathan Rossi <nathan.rossi@digi.com> + +Description +----------- + +The INA238 is a current shunt, power and temperature monitor with an I2C +interface. It includes a number of programmable functions including alerts, +conversion rate, sample averaging and selectable shunt voltage accuracy. + +The shunt value in micro-ohms can be set via platform data or device tree at +compile-time or via the shunt_resistor attribute in sysfs at run-time. Please +refer to the Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings +if the device tree is used. + +Sysfs entries +------------- + +======================= ======================================================= +in0_input Shunt voltage (mV) +in0_min Minimum shunt voltage threshold (mV) +in0_min_alarm Minimum shunt voltage alarm +in0_max Maximum shunt voltage threshold (mV) +in0_max_alarm Maximum shunt voltage alarm + +in1_input Bus voltage (mV) +in1_min Minimum bus voltage threshold (mV) +in1_min_alarm Minimum shunt voltage alarm +in1_max Maximum bus voltage threshold (mV) +in1_max_alarm Maximum shunt voltage alarm + +power1_input Power measurement (uW) +power1_max Maximum power threshold (uW) +power1_max_alarm Maximum power alarm + +curr1_input Current measurement (mA) + +temp1_input Die temperature measurement (mC) +temp1_max Maximum die temperature threshold (mC) +temp1_max_alarm Maximum die temperature alarm +======================= ======================================================= |