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- .. 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)
- ======================= =======================================================
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