| .. SPDX-License-Identifier: GPL-2.0 |
| |
| Kernel driver vt7505 |
| ==================== |
| |
| Supported chips: |
| |
| * Analog Devices MAX16545 |
| |
| Prefix: 'max16545' |
| |
| Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max16545b-max16545c.pdf |
| |
| * Analog Devices MAX16550 |
| |
| Prefix: 'max16550' |
| |
| Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max16550.pdf |
| |
| * Volterra VT7505 |
| |
| Prefix: 'vt7505' |
| |
| Datasheet: Not publicly available; register-compatible with the MAX16545. |
| |
| Author: Georgi Vlaev <gvlaev@juniper.net> |
| |
| Description |
| ----------- |
| |
| This driver supports hardware monitoring for the Analog Devices MAX16545 and |
| MAX16550, and the Volterra VT7505 PMBus controllers. |
| |
| The devices report input and output voltage, input and output current, |
| input power, and temperature. All values use the PMBus direct data format. |
| Peak (maximum) values for input voltage, output voltage, output current, |
| input power and temperature are exposed and can be reset. Writing to any |
| ``*_reset_history`` attribute clears all of the device's peak values. |
| |
| The reported current and power values depend on the resistance of the |
| external current-report resistor connected between the ILOAD pin and |
| ground. This resistance can be provided via the ``adi,rload-ohms`` |
| device tree property; a default of 4750 ohms is used when it is absent. |
| |
| Sysfs entries |
| ------------- |
| |
| The limit and alarm attributes are created by the PMBus core for the limit |
| registers that the device implements. See |
| Documentation/hwmon/sysfs-interface.rst for the meaning of each attribute. |
| |
| ======================= ======================================================== |
| in1_label "vin" |
| in1_input Measured input voltage. |
| in1_min Input undervoltage warning limit. |
| in1_min_alarm Input undervoltage warning alarm. |
| in1_lcrit Input undervoltage fault limit. |
| in1_lcrit_alarm Input undervoltage fault alarm. |
| in1_highest Historical maximum input voltage. |
| in1_reset_history Write to reset all peak values. |
| in2_label "vout1" |
| in2_input Measured output voltage. |
| in2_min Output undervoltage warning limit. |
| in2_min_alarm Output undervoltage warning alarm. |
| in2_highest Historical maximum output voltage. |
| in2_reset_history Write to reset all peak values. |
| curr1_label "iin" |
| curr1_input Measured input current. |
| curr1_alarm Input current alarm. |
| curr2_label "iout1" |
| curr2_input Measured output current. |
| curr2_max Output overcurrent warning limit. |
| curr2_max_alarm Output overcurrent warning alarm. |
| curr2_highest Historical maximum output current. |
| curr2_reset_history Write to reset all peak values. |
| power1_label "pin" |
| power1_input Measured input power. |
| power1_max Input overpower warning limit. |
| power1_alarm Input overpower warning alarm. |
| power1_input_highest Historical maximum input power. |
| power1_reset_history Write to reset all peak values. |
| temp1_input Measured temperature. |
| temp1_max Overtemperature warning limit. |
| temp1_max_alarm Overtemperature warning alarm. |
| temp1_crit Overtemperature fault limit. |
| temp1_crit_alarm Overtemperature fault alarm. |
| temp1_highest Historical maximum temperature. |
| temp1_reset_history Write to reset all peak values. |
| ======================= ======================================================== |
