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 Naming and data format standards for sysfs files 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. |