[0-*] denotes any positive number starting from 0
[1-*] denotes any positive number starting from 1
RO read only value
+WO write only value
RW read/write value
Read/write values may be read-only for some chips, depending on the
given driver if the chip has the feature.
-********
-* Name *
-********
+*********************
+* Global attributes *
+*********************
name The chip name.
This should be a short, lowercase string, not containing
I2C devices get this attribute created automatically.
RO
+update_rate The rate at which the chip will update readings.
+ Unit: millisecond
+ RW
+ Some devices have a variable update rate. This attribute
+ can be used to change the update rate to the desired
+ frequency.
+
************
* Voltages *
Unit: revolution/min (RPM)
RW
+fan[1-*]_max Fan maximum value
+ Unit: revolution/min (RPM)
+ Only rarely supported by the hardware.
+ RW
+
fan[1-*]_input Fan input value.
Unit: revolution/min (RPM)
RO
to PWM output channels.
RW
-OR
-
temp[1-*]_auto_point[1-*]_pwm
temp[1-*]_auto_point[1-*]_temp
temp[1-*]_auto_point[1-*]_temp_hyst
to temperature channels.
RW
+There is a third case where trip points are associated to both PWM output
+channels and temperature channels: the PWM values are associated to PWM
+output channels while the temperature values are associated to temperature
+channels. In that case, the result is determined by the mapping between
+temperature inputs and PWM outputs. When several temperature inputs are
+mapped to a given PWM output, this leads to several candidate PWM values.
+The actual result is up to the chip, but in general the highest candidate
+value (fastest fan speed) wins.
+
****************
* Temperatures *
user-space.
RO
+temp[1-*]_lowest
+ Historical minimum temperature
+ Unit: millidegree Celsius
+ RO
+
+temp[1-*]_highest
+ Historical maximum temperature
+ Unit: millidegree Celsius
+ RO
+
+temp[1-*]_reset_history
+ Reset temp_lowest and temp_highest
+ WO
+
+temp_reset_history
+ Reset temp_lowest and temp_highest for all sensors
+ WO
+
Some chips measure temperature using external thermistors and an ADC, and
report the temperature measurement as a voltage. Converting this voltage
back to a temperature (or the other way around for limits) requires
Unit: microWatt
RO
-power[1-*]_average_interval Power use averaging interval
+power[1-*]_average_interval Power use averaging interval. A poll
+ notification is sent to this file if the
+ hardware changes the averaging interval.
Unit: milliseconds
RW
+power[1-*]_average_interval_max Maximum power use averaging interval
+ Unit: milliseconds
+ RO
+
+power[1-*]_average_interval_min Minimum power use averaging interval
+ Unit: milliseconds
+ RO
+
power[1-*]_average_highest Historical average maximum power use
Unit: microWatt
RO
Unit: microWatt
RO
+power[1-*]_average_max A poll notification is sent to
+ power[1-*]_average when power use
+ rises above this value.
+ Unit: microWatt
+ RW
+
+power[1-*]_average_min A poll notification is sent to
+ power[1-*]_average when power use
+ sinks below this value.
+ Unit: microWatt
+ RW
+
power[1-*]_input Instantaneous power use
Unit: microWatt
RO
average_highest and average_lowest.
WO
+power[1-*]_accuracy Accuracy of the power meter.
+ Unit: Percent
+ RO
+
+power[1-*]_alarm 1 if the system is drawing more power than the
+ cap allows; 0 otherwise. A poll notification is
+ sent to this file when the power use exceeds the
+ cap. This file only appears if the cap is known
+ to be enforced by hardware.
+ RO
+
+power[1-*]_cap If power use rises above this limit, the
+ system should take action to reduce power use.
+ A poll notification is sent to this file if the
+ cap is changed by the hardware. The *_cap
+ files only appear if the cap is known to be
+ enforced by hardware.
+ Unit: microWatt
+ RW
+
+power[1-*]_cap_hyst Margin of hysteresis built around capping and
+ notification.
+ Unit: microWatt
+ RW
+
+power[1-*]_cap_max Maximum cap that can be set.
+ Unit: microWatt
+ RO
+
+power[1-*]_cap_min Minimum cap that can be set.
+ Unit: microWatt
+ RO
+
**********
* Energy *
**********
Unit: microJoule
RO
+
**********
* Alarms *
**********
in[0-*]_min_alarm
in[0-*]_max_alarm
fan[1-*]_min_alarm
+fan[1-*]_max_alarm
temp[1-*]_min_alarm
temp[1-*]_max_alarm
temp[1-*]_crit_alarm
RW
+***********************
+* Intrusion detection *
+***********************
+
+intrusion[0-*]_alarm
+ Chassis intrusion detection
+ 0: OK
+ 1: intrusion detected
+ RW
+ Contrary to regular alarm flags which clear themselves
+ automatically when read, this one sticks until cleared by
+ the user. This is done by writing 0 to the file. Writing
+ other values is unsupported.
+
+intrusion[0-*]_beep
+ Chassis intrusion beep
+ 0: disable
+ 1: enable
+ RW
+
+
sysfs attribute writes interpretation
-------------------------------------
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff