forked from Minki/linux
f30ce040a7
Enabling and disabling PEC for PMBus devices is currently only supported with a debugfs attribute, which requires debugfs to be enabled and is thus less than perfect. Take the lm90 driver as example and add a 'pec' attribute to the I2C device if both the I2C adapter and the PMBus device support it. Remove the now obsolete 'pec' attribute from debugfs. Cc: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
950 lines
18 KiB
Plaintext
950 lines
18 KiB
Plaintext
What: /sys/class/hwmon/hwmonX/name
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Description:
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The chip name.
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This should be a short, lowercase string, not containing
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whitespace, dashes, or the wildcard character '*'.
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This attribute represents the chip name. It is the only
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mandatory attribute.
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I2C devices get this attribute created automatically.
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RO
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What: /sys/class/hwmon/hwmonX/label
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Description:
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A descriptive label that allows to uniquely identify a
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device within the system.
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The contents of the label are free-form.
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RO
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What: /sys/class/hwmon/hwmonX/update_interval
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Description:
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The interval at which the chip will update readings.
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Unit: millisecond
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RW
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Some devices have a variable update rate or interval.
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This attribute can be used to change it to the desired value.
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What: /sys/class/hwmon/hwmonX/inY_min
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Description:
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Voltage min value.
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Unit: millivolt
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RW
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What: /sys/class/hwmon/hwmonX/inY_lcrit
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Description:
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Voltage critical min value.
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Unit: millivolt
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RW
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If voltage drops to or below this limit, the system may
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take drastic action such as power down or reset. At the very
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least, it should report a fault.
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What: /sys/class/hwmon/hwmonX/inY_max
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Description:
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Voltage max value.
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Unit: millivolt
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RW
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What: /sys/class/hwmon/hwmonX/inY_crit
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Description:
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Voltage critical max value.
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Unit: millivolt
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RW
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If voltage reaches or exceeds this limit, the system may
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take drastic action such as power down or reset. At the very
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least, it should report a fault.
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What: /sys/class/hwmon/hwmonX/inY_input
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Description:
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Voltage input value.
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Unit: millivolt
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RO
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Voltage measured on the chip pin.
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Actual voltage depends on the scaling resistors on the
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motherboard, as recommended in the chip datasheet.
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This varies by chip and by motherboard.
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Because of this variation, values are generally NOT scaled
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by the chip driver, and must be done by the application.
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However, some drivers (notably lm87 and via686a)
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do scale, because of internal resistors built into a chip.
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These drivers will output the actual voltage. Rule of
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thumb: drivers should report the voltage values at the
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"pins" of the chip.
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What: /sys/class/hwmon/hwmonX/inY_average
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Description:
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Average voltage
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Unit: millivolt
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RO
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What: /sys/class/hwmon/hwmonX/inY_lowest
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Description:
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Historical minimum voltage
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Unit: millivolt
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RO
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What: /sys/class/hwmon/hwmonX/inY_highest
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Description:
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Historical maximum voltage
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Unit: millivolt
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RO
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What: /sys/class/hwmon/hwmonX/inY_reset_history
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Description:
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Reset inX_lowest and inX_highest
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WO
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What: /sys/class/hwmon/hwmonX/in_reset_history
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Description:
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Reset inX_lowest and inX_highest for all sensors
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WO
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What: /sys/class/hwmon/hwmonX/inY_label
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Description:
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Suggested voltage channel label.
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Text string
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Should only be created if the driver has hints about what
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this voltage channel is being used for, and user-space
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doesn't. In all other cases, the label is provided by
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user-space.
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RO
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What: /sys/class/hwmon/hwmonX/inY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return -ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/cpuY_vid
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Description:
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CPU core reference voltage.
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Unit: millivolt
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RO
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Not always correct.
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What: /sys/class/hwmon/hwmonX/vrm
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Description:
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Voltage Regulator Module version number.
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RW (but changing it should no more be necessary)
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Originally the VRM standard version multiplied by 10, but now
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an arbitrary number, as not all standards have a version
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number.
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Affects the way the driver calculates the CPU core reference
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voltage from the vid pins.
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What: /sys/class/hwmon/hwmonX/inY_rated_min
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Description:
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Minimum rated voltage.
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Unit: millivolt
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RO
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What: /sys/class/hwmon/hwmonX/inY_rated_max
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Description:
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Maximum rated voltage.
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Unit: millivolt
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RO
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What: /sys/class/hwmon/hwmonX/fanY_min
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Description:
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Fan minimum value
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Unit: revolution/min (RPM)
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RW
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What: /sys/class/hwmon/hwmonX/fanY_max
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Description:
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Fan maximum value
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Unit: revolution/min (RPM)
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Only rarely supported by the hardware.
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RW
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What: /sys/class/hwmon/hwmonX/fanY_input
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Description:
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Fan input value.
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Unit: revolution/min (RPM)
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RO
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What: /sys/class/hwmon/hwmonX/fanY_div
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Description:
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Fan divisor.
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Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
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RW
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Some chips only support values 1, 2, 4 and 8.
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Note that this is actually an internal clock divisor, which
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affects the measurable speed range, not the read value.
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What: /sys/class/hwmon/hwmonX/fanY_pulses
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Description:
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Number of tachometer pulses per fan revolution.
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Integer value, typically between 1 and 4.
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RW
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This value is a characteristic of the fan connected to the
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device's input, so it has to be set in accordance with the fan
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model.
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Should only be created if the chip has a register to configure
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the number of pulses. In the absence of such a register (and
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thus attribute) the value assumed by all devices is 2 pulses
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per fan revolution.
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What: /sys/class/hwmon/hwmonX/fanY_target
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Description:
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Desired fan speed
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Unit: revolution/min (RPM)
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RW
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Only makes sense if the chip supports closed-loop fan speed
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control based on the measured fan speed.
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What: /sys/class/hwmon/hwmonX/fanY_label
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Description:
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Suggested fan channel label.
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Text string
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Should only be created if the driver has hints about what
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this fan channel is being used for, and user-space doesn't.
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In all other cases, the label is provided by user-space.
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RO
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What: /sys/class/hwmon/hwmonX/fanY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return -ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/pwmY
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Description:
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Pulse width modulation fan control.
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Integer value in the range 0 to 255
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RW
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255 is max or 100%.
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What: /sys/class/hwmon/hwmonX/pwmY_enable
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Description:
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Fan speed control method:
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- 0: no fan speed control (i.e. fan at full speed)
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- 1: manual fan speed control enabled (using `pwmY`)
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- 2+: automatic fan speed control enabled
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Check individual chip documentation files for automatic mode
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details.
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RW
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What: /sys/class/hwmon/hwmonX/pwmY_mode
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Description:
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- 0: DC mode (direct current)
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- 1: PWM mode (pulse-width modulation)
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RW
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What: /sys/class/hwmon/hwmonX/pwmY_freq
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Description:
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Base PWM frequency in Hz.
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Only possibly available when pwmN_mode is PWM, but not always
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present even then.
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RW
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What: /sys/class/hwmon/hwmonX/pwmY_auto_channels_temp
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Description:
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Select which temperature channels affect this PWM output in
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auto mode.
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Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
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Which values are possible depend on the chip used.
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RW
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What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_pwm
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What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp
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What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp_hyst
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Description:
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Define the PWM vs temperature curve.
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Number of trip points is chip-dependent. Use this for chips
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which associate trip points to PWM output channels.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_pwm
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What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp
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What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp_hyst
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Description:
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Define the PWM vs temperature curve.
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Number of trip points is chip-dependent. Use this for chips
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which associate trip points to temperature channels.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_type
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Description:
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Sensor type selection.
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Integers 1 to 6
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RW
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- 1: CPU embedded diode
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- 2: 3904 transistor
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- 3: thermal diode
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- 4: thermistor
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- 5: AMD AMDSI
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- 6: Intel PECI
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Not all types are supported by all chips
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What: /sys/class/hwmon/hwmonX/tempY_max
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Description:
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Temperature max value.
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Unit: millidegree Celsius (or millivolt, see below)
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RW
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What: /sys/class/hwmon/hwmonX/tempY_min
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Description:
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Temperature min value.
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Unit: millidegree Celsius
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RW
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What: /sys/class/hwmon/hwmonX/tempY_max_hyst
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Description:
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Temperature hysteresis value for max limit.
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Unit: millidegree Celsius
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Must be reported as an absolute temperature, NOT a delta
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from the max value.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_min_hyst
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Description:
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Temperature hysteresis value for min limit.
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Unit: millidegree Celsius
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Must be reported as an absolute temperature, NOT a delta
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from the min value.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_input
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Description:
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Temperature input value.
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Unit: millidegree Celsius
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RO
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What: /sys/class/hwmon/hwmonX/tempY_crit
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Description:
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Temperature critical max value, typically greater than
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corresponding temp_max values.
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Unit: millidegree Celsius
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RW
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What: /sys/class/hwmon/hwmonX/tempY_crit_alarm
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Description:
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Critical high temperature alarm flag.
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- 0: OK
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- 1: temperature has reached tempY_crit
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RW
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Contrary to regular alarm flags which clear themselves
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automatically when read, this one sticks until cleared by
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the user. This is done by writing 0 to the file. Writing
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other values is unsupported.
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What: /sys/class/hwmon/hwmonX/tempY_crit_hyst
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Description:
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Temperature hysteresis value for critical limit.
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Unit: millidegree Celsius
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Must be reported as an absolute temperature, NOT a delta
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from the critical value.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_emergency
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Description:
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Temperature emergency max value, for chips supporting more than
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two upper temperature limits. Must be equal or greater than
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corresponding temp_crit values.
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Unit: millidegree Celsius
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RW
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What: /sys/class/hwmon/hwmonX/tempY_emergency_hyst
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Description:
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Temperature hysteresis value for emergency limit.
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Unit: millidegree Celsius
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Must be reported as an absolute temperature, NOT a delta
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from the emergency value.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_lcrit
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Description:
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Temperature critical min value, typically lower than
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corresponding temp_min values.
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Unit: millidegree Celsius
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RW
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What: /sys/class/hwmon/hwmonX/tempY_lcrit_hyst
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Description:
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Temperature hysteresis value for critical min limit.
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Unit: millidegree Celsius
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Must be reported as an absolute temperature, NOT a delta
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from the critical min value.
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RW
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What: /sys/class/hwmon/hwmonX/tempY_offset
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Description:
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Temperature offset which is added to the temperature reading
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by the chip.
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Unit: millidegree Celsius
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Read/Write value.
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What: /sys/class/hwmon/hwmonX/tempY_label
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Description:
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Suggested temperature channel label.
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Text string
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Should only be created if the driver has hints about what
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this temperature channel is being used for, and user-space
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doesn't. In all other cases, the label is provided by
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user-space.
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RO
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What: /sys/class/hwmon/hwmonX/tempY_lowest
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Description:
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Historical minimum temperature
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Unit: millidegree Celsius
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RO
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What: /sys/class/hwmon/hwmonX/tempY_highest
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Description:
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Historical maximum temperature
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Unit: millidegree Celsius
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RO
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What: /sys/class/hwmon/hwmonX/tempY_reset_history
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Description:
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Reset temp_lowest and temp_highest
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WO
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What: /sys/class/hwmon/hwmonX/temp_reset_history
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Description:
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Reset temp_lowest and temp_highest for all sensors
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WO
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What: /sys/class/hwmon/hwmonX/tempY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return -ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/tempY_rated_min
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Description:
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Minimum rated temperature.
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Unit: millidegree Celsius
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RO
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What: /sys/class/hwmon/hwmonX/tempY_rated_max
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Description:
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Maximum rated temperature.
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Unit: millidegree Celsius
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RO
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What: /sys/class/hwmon/hwmonX/currY_max
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Description:
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Current max value
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Unit: milliampere
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RW
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What: /sys/class/hwmon/hwmonX/currY_min
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Description:
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Current min value.
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Unit: milliampere
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RW
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What: /sys/class/hwmon/hwmonX/currY_lcrit
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Description:
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Current critical low value
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Unit: milliampere
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RW
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What: /sys/class/hwmon/hwmonX/currY_crit
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Description:
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Current critical high value.
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Unit: milliampere
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RW
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What: /sys/class/hwmon/hwmonX/currY_input
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Description:
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Current input value
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/currY_average
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Description:
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Average current use
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/currY_lowest
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Description:
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Historical minimum current
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/currY_highest
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Description:
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Historical maximum current
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/currY_reset_history
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Description:
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Reset currX_lowest and currX_highest
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WO
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What: /sys/class/hwmon/hwmonX/curr_reset_history
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Description:
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Reset currX_lowest and currX_highest for all sensors
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WO
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What: /sys/class/hwmon/hwmonX/currY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return -ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/currY_rated_min
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Description:
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Minimum rated current.
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/currY_rated_max
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Description:
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Maximum rated current.
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Unit: milliampere
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average
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Description:
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Average power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average_interval
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Description:
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Power use averaging interval. A poll
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notification is sent to this file if the
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hardware changes the averaging interval.
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Unit: milliseconds
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RW
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What: /sys/class/hwmon/hwmonX/powerY_average_interval_max
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Description:
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Maximum power use averaging interval
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Unit: milliseconds
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average_interval_min
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Description:
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Minimum power use averaging interval
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Unit: milliseconds
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average_highest
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Description:
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Historical average maximum power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average_lowest
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Description:
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Historical average minimum power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_average_max
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Description:
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A poll notification is sent to
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`powerY_average` when power use
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rises above this value.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_average_min
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Description:
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A poll notification is sent to
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`powerY_average` when power use
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sinks below this value.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_input
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Description:
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Instantaneous power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_input_highest
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Description:
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Historical maximum power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_input_lowest
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Description:
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Historical minimum power use
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_reset_history
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Description:
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Reset input_highest, input_lowest,
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average_highest and average_lowest.
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WO
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What: /sys/class/hwmon/hwmonX/powerY_accuracy
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Description:
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Accuracy of the power meter.
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Unit: Percent
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RO
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What: /sys/class/hwmon/hwmonX/powerY_cap
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Description:
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If power use rises above this limit, the
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system should take action to reduce power use.
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A poll notification is sent to this file if the
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cap is changed by the hardware. The `*_cap`
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files only appear if the cap is known to be
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enforced by hardware.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_cap_hyst
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Description:
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Margin of hysteresis built around capping and
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notification.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_cap_max
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Description:
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Maximum cap that can be set.
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_cap_min
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Description:
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Minimum cap that can be set.
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_max
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Description:
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Maximum power.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_crit
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Description:
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Critical maximum power.
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If power rises to or above this limit, the
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system is expected take drastic action to reduce
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power consumption, such as a system shutdown or
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a forced powerdown of some devices.
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Unit: microWatt
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RW
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What: /sys/class/hwmon/hwmonX/powerY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return
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-ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/powerY_rated_min
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Description:
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Minimum rated power.
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/powerY_rated_max
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Description:
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Maximum rated power.
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Unit: microWatt
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RO
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What: /sys/class/hwmon/hwmonX/energyY_input
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Description:
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Cumulative energy use
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Unit: microJoule
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RO
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What: /sys/class/hwmon/hwmonX/energyY_enable
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Description:
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Enable or disable the sensors.
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When disabled the sensor read will return
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-ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/humidityY_input
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Description:
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Humidity
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Unit: milli-percent (per cent mille, pcm)
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RO
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What: /sys/class/hwmon/hwmonX/humidityY_enable
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Description:
|
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Enable or disable the sensors
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When disabled the sensor read will return
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-ENODATA.
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- 1: Enable
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- 0: Disable
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RW
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What: /sys/class/hwmon/hwmonX/humidityY_rated_min
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Description:
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Minimum rated humidity.
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Unit: milli-percent (per cent mille, pcm)
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RO
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What: /sys/class/hwmon/hwmonX/humidityY_rated_max
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Description:
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Maximum rated humidity.
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Unit: milli-percent (per cent mille, pcm)
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|
|
RO
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What: /sys/class/hwmon/hwmonX/intrusionY_alarm
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Description:
|
|
Chassis intrusion detection
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- 0: OK
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- 1: intrusion detected
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|
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RW
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Contrary to regular alarm flags which clear themselves
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automatically when read, this one sticks until cleared by
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the user. This is done by writing 0 to the file. Writing
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other values is unsupported.
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What: /sys/class/hwmon/hwmonX/intrusionY_beep
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Description:
|
|
Chassis intrusion beep
|
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|
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- 0: disable
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- 1: enable
|
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|
|
RW
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What: /sys/class/hwmon/hwmonX/device/pec
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Description:
|
|
PEC support on I2C devices
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|
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- 0, off, n: disable
|
|
- 1, on, y: enable
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RW
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