| .. SPDX-License-Identifier: GPL-2.0-or-later |
| |
| Kernel driver isl28022 |
| ====================== |
| |
| Supported chips: |
| |
| * Renesas ISL28022 |
| |
| Prefix: 'isl28022' |
| |
| Addresses scanned: none |
| |
| Datasheet: Publicly available at the Renesas website |
| |
| https://www.renesas.com/us/en/www/doc/datasheet/isl28022.pdf |
| |
| Author: |
| Carsten Spieß <mail@carsten-spiess.de> |
| |
| Description |
| ----------- |
| |
| The ISL28022 is a power monitor with I2C interface. The device monitors |
| voltage, current via shunt resistor and calculated power. |
| |
| Usage Notes |
| ----------- |
| |
| This driver does not auto-detect devices. You will have to instantiate the |
| device explicitly. Please see Documentation/i2c/instantiating-devices.rst for |
| details. |
| |
| The shunt value in micro-ohms, shunt voltage range and averaging can be set |
| with device properties. |
| Please refer to the Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml |
| for bindings if the device tree is used. |
| |
| The driver supports only shunt and bus continuous ADC mode at 15bit resolution. |
| Averaging can be set from 1 to 128 samples (power of 2) on both channels. |
| Shunt voltage range of 40, 80, 160 or 320mV is allowed |
| The bus voltage range is 60V fixed. |
| |
| Sysfs entries |
| ------------- |
| |
| The following attributes are supported. All attributes are read-only. |
| |
| ======================= ======================================================= |
| in0_input bus voltage (milli Volt) |
| in1_input shunt voltage (milli Volt) |
| |
| curr1_input current (milli Ampere) |
| power1_input power (micro Watt) |
| ======================= ======================================================= |
| |
| Debugfs entries |
| --------------- |
| |
| The following attributes are supported. All attributes are read-only. |
| |
| ======================= ======================================================= |
| shunt_voltage shunt voltage (micro Volt) |
| ======================= ======================================================= |
