Kernel driver ina3221 ===================== Supported chips: * Texas Instruments INA3221 Prefix: 'ina3221' Addresses: I2C 0x40 - 0x43 Datasheet: Publicly available at the Texas Instruments website https://www.ti.com/ Author: Andrew F. Davis Description ----------- The Texas Instruments INA3221 monitors voltage, current, and power on the high side of up to three D.C. power supplies. The INA3221 monitors both shunt drop and supply voltage, with programmable conversion times and averaging, current and power are calculated host-side from these. Sysfs entries ------------- ======================= ======================================================= in[123]_label Voltage channel labels in[123]_enable Voltage channel enable controls in[123]_input Bus voltage(mV) channels curr[123]_input Current(mA) measurement channels shunt[123]_resistor Shunt resistance(uOhm) channels curr[123]_crit Critical alert current(mA) setting, activates the corresponding alarm when the respective current is above this value curr[123]_crit_alarm Critical alert current limit exceeded curr[123]_max Warning alert current(mA) setting, activates the corresponding alarm when the respective current average is above this value. curr[123]_max_alarm Warning alert current limit exceeded in[456]_input Shunt voltage(uV) for channels 1, 2, and 3 respectively in7_input Sum of shunt voltage(uV) channels in7_label Channel label for sum of shunt voltage curr4_input Sum of current(mA) measurement channels, (only available when all channels use the same resistor value for their shunt resistors) curr4_crit Critical alert current(mA) setting for sum of current measurements, activates the corresponding alarm when the respective current is above this value (only effective when all channels use the same resistor value for their shunt resistors) curr4_crit_alarm Critical alert current limit exceeded for sum of current measurements. samples Number of samples using in the averaging mode. Supports the list of number of samples: 1, 4, 16, 64, 128, 256, 512, 1024 update_interval Data conversion time in millisecond, following: update_interval = C x S x (BC + SC) * C: number of enabled channels * S: number of samples * BC: bus-voltage conversion time in millisecond * SC: shunt-voltage conversion time in millisecond Affects both Bus- and Shunt-voltage conversion time. Note that setting update_interval to 0ms sets both BC and SC to 140 us (minimum conversion time). ======================= =======================================================