2009-08-21 05:49:25 +08:00
|
|
|
Kernel driver ina209
|
2019-04-17 17:46:27 +08:00
|
|
|
====================
|
2009-08-21 05:49:25 +08:00
|
|
|
|
|
|
|
|
Supported chips:
|
2019-04-17 17:46:27 +08:00
|
|
|
|
2009-08-21 05:49:25 +08:00
|
|
|
* Burr-Brown / Texas Instruments INA209
|
2019-04-17 17:46:27 +08:00
|
|
|
|
2009-08-21 05:49:25 +08:00
|
|
|
Prefix: 'ina209'
|
2019-04-17 17:46:27 +08:00
|
|
|
|
2009-08-21 05:49:25 +08:00
|
|
|
Addresses scanned: -
|
2019-04-17 17:46:27 +08:00
|
|
|
|
2009-08-21 05:49:25 +08:00
|
|
|
Datasheet:
|
2020-07-20 02:05:21 +08:00
|
|
|
https://www.ti.com/lit/gpn/ina209
|
2009-08-21 05:49:25 +08:00
|
|
|
|
2019-04-17 17:46:27 +08:00
|
|
|
Author:
|
|
|
|
|
- Paul Hays <Paul.Hays@cattail.ca>
|
|
|
|
|
- Ira W. Snyder <iws@ovro.caltech.edu>
|
|
|
|
|
- Guenter Roeck <linux@roeck-us.net>
|
2009-08-21 05:49:25 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
Description
|
|
|
|
|
-----------
|
|
|
|
|
|
|
|
|
|
The TI / Burr-Brown INA209 monitors voltage, current, and power on the high side
|
|
|
|
|
of a D.C. power supply. It can perform measurements and calculations in the
|
|
|
|
|
background to supply readings at any time. It includes a programmable
|
|
|
|
|
calibration multiplier to scale the displayed current and power values.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Sysfs entries
|
|
|
|
|
-------------
|
|
|
|
|
|
|
|
|
|
The INA209 chip is highly configurable both via hardwiring and via
|
|
|
|
|
the I2C bus. See the datasheet for details.
|
|
|
|
|
|
|
|
|
|
This tries to expose most monitoring features of the hardware via
|
|
|
|
|
sysfs. It does not support every feature of this chip.
|
|
|
|
|
|
2019-04-17 17:46:27 +08:00
|
|
|
======================= =======================================================
|
2009-08-21 05:49:25 +08:00
|
|
|
in0_input shunt voltage (mV)
|
|
|
|
|
in0_input_highest shunt voltage historical maximum reading (mV)
|
|
|
|
|
in0_input_lowest shunt voltage historical minimum reading (mV)
|
|
|
|
|
in0_reset_history reset shunt voltage history
|
|
|
|
|
in0_max shunt voltage max alarm limit (mV)
|
|
|
|
|
in0_min shunt voltage min alarm limit (mV)
|
|
|
|
|
in0_crit_max shunt voltage crit max alarm limit (mV)
|
|
|
|
|
in0_crit_min shunt voltage crit min alarm limit (mV)
|
|
|
|
|
in0_max_alarm shunt voltage max alarm limit exceeded
|
|
|
|
|
in0_min_alarm shunt voltage min alarm limit exceeded
|
|
|
|
|
in0_crit_max_alarm shunt voltage crit max alarm limit exceeded
|
|
|
|
|
in0_crit_min_alarm shunt voltage crit min alarm limit exceeded
|
|
|
|
|
|
|
|
|
|
in1_input bus voltage (mV)
|
|
|
|
|
in1_input_highest bus voltage historical maximum reading (mV)
|
|
|
|
|
in1_input_lowest bus voltage historical minimum reading (mV)
|
|
|
|
|
in1_reset_history reset bus voltage history
|
|
|
|
|
in1_max bus voltage max alarm limit (mV)
|
|
|
|
|
in1_min bus voltage min alarm limit (mV)
|
|
|
|
|
in1_crit_max bus voltage crit max alarm limit (mV)
|
|
|
|
|
in1_crit_min bus voltage crit min alarm limit (mV)
|
|
|
|
|
in1_max_alarm bus voltage max alarm limit exceeded
|
|
|
|
|
in1_min_alarm bus voltage min alarm limit exceeded
|
|
|
|
|
in1_crit_max_alarm bus voltage crit max alarm limit exceeded
|
|
|
|
|
in1_crit_min_alarm bus voltage crit min alarm limit exceeded
|
|
|
|
|
|
|
|
|
|
power1_input power measurement (uW)
|
|
|
|
|
power1_input_highest power historical maximum reading (uW)
|
|
|
|
|
power1_reset_history reset power history
|
|
|
|
|
power1_max power max alarm limit (uW)
|
|
|
|
|
power1_crit power crit alarm limit (uW)
|
|
|
|
|
power1_max_alarm power max alarm limit exceeded
|
|
|
|
|
power1_crit_alarm power crit alarm limit exceeded
|
|
|
|
|
|
|
|
|
|
curr1_input current measurement (mA)
|
|
|
|
|
|
|
|
|
|
update_interval data conversion time; affects number of samples used
|
|
|
|
|
to average results for shunt and bus voltages.
|
2019-04-17 17:46:27 +08:00
|
|
|
======================= =======================================================
|
2009-08-21 05:49:25 +08:00
|
|
|
|
|
|
|
|
General Remarks
|
|
|
|
|
---------------
|
|
|
|
|
|
|
|
|
|
The power and current registers in this chip require that the calibration
|
|
|
|
|
register is programmed correctly before they are used. Normally this is expected
|
|
|
|
|
to be done in the BIOS. In the absence of BIOS programming, the shunt resistor
|
|
|
|
|
voltage can be provided using platform data. The driver uses platform data from
|
|
|
|
|
the ina2xx driver for this purpose. If calibration register data is not provided
|
|
|
|
|
via platform data, the driver checks if the calibration register has been
|
|
|
|
|
programmed (ie has a value not equal to zero). If so, this value is retained.
|
|
|
|
|
Otherwise, a default value reflecting a shunt resistor value of 10 mOhm is
|
|
|
|
|
programmed into the calibration register.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Output Pins
|
|
|
|
|
-----------
|
|
|
|
|
|
|
|
|
|
Output pin programming is a board feature which depends on the BIOS. It is
|
|
|
|
|
outside the scope of a hardware monitoring driver to enable or disable output
|
|
|
|
|
pins.
|
