mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.8 KiB
62 lines
1.8 KiB
Kernel driver ltc2990 |
|
===================== |
|
|
|
|
|
Supported chips: |
|
|
|
* Linear Technology LTC2990 |
|
|
|
Prefix: 'ltc2990' |
|
|
|
Addresses scanned: - |
|
|
|
Datasheet: http://www.linear.com/product/ltc2990 |
|
|
|
|
|
|
|
Author: |
|
|
|
- Mike Looijmans <[email protected]> |
|
- Tom Levens <[email protected]> |
|
|
|
|
|
Description |
|
----------- |
|
|
|
LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor. |
|
The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4) |
|
can be combined to measure a differential voltage, which is typically used to |
|
measure current through a series resistor, or a temperature with an external |
|
diode. |
|
|
|
|
|
Usage Notes |
|
----------- |
|
|
|
This driver does not probe for PMBus devices. You will have to instantiate |
|
devices explicitly. |
|
|
|
|
|
Sysfs attributes |
|
---------------- |
|
|
|
============= ================================================== |
|
in0_input Voltage at Vcc pin in millivolt (range 2.5V to 5V) |
|
temp1_input Internal chip temperature in millidegrees Celsius |
|
============= ================================================== |
|
|
|
A subset of the following attributes are visible, depending on the measurement |
|
mode of the chip. |
|
|
|
============= ========================================================== |
|
in[1-4]_input Voltage at V[1-4] pin in millivolt |
|
temp2_input External temperature sensor TR1 in millidegrees Celsius |
|
temp3_input External temperature sensor TR2 in millidegrees Celsius |
|
curr1_input Current in mA across V1-V2 assuming a 1mOhm sense resistor |
|
curr2_input Current in mA across V3-V4 assuming a 1mOhm sense resistor |
|
============= ========================================================== |
|
|
|
The "curr*_input" measurements actually report the voltage drop across the |
|
input pins in microvolts. This is equivalent to the current through a 1mOhm |
|
sense resistor. Divide the reported value by the actual sense resistor value |
|
in mOhm to get the actual value.
|
|
|