1.. SPDX-License-Identifier: GPL-2.0-or-later 2 3Kernel driver isl28022 4====================== 5 6Supported chips: 7 8 * Renesas ISL28022 9 10 Prefix: 'isl28022' 11 12 Addresses scanned: none 13 14 Datasheet: Publicly available at the Renesas website 15 16 https://www.renesas.com/us/en/www/doc/datasheet/isl28022.pdf 17 18Author: 19 Carsten Spieß <mail@carsten-spiess.de> 20 21Description 22----------- 23 24The ISL28022 is a power monitor with I2C interface. The device monitors 25voltage, current via shunt resistor and calculated power. 26 27Usage Notes 28----------- 29 30This driver does not auto-detect devices. You will have to instantiate the 31device explicitly. Please see Documentation/i2c/instantiating-devices.rst for 32details. 33 34The shunt value in micro-ohms, shunt voltage range and averaging can be set 35with device properties. 36Please refer to the Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml 37for bindings if the device tree is used. 38 39The driver supports only shunt and bus continuous ADC mode at 15bit resolution. 40Averaging can be set from 1 to 128 samples (power of 2) on both channels. 41Shunt voltage range of 40, 80, 160 or 320mV is allowed 42The bus voltage range is 60V fixed. 43 44Sysfs entries 45------------- 46 47The following attributes are supported. All attributes are read-only. 48 49======================= ======================================================= 50in0_input bus voltage (milli Volt) 51in1_input shunt voltage (milli Volt) 52 53curr1_input current (milli Ampere) 54power1_input power (micro Watt) 55======================= ======================================================= 56 57Debugfs entries 58--------------- 59 60The following attributes are supported. All attributes are read-only. 61 62======================= ======================================================= 63shunt_voltage shunt voltage (micro Volt) 64======================= ======================================================= 65