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| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-hwmon | 918 | ||||
| -rw-r--r-- | Documentation/hwmon/sysfs-interface.rst | 596 | ||||
| -rw-r--r-- | MAINTAINERS | 1 |
3 files changed, 961 insertions, 554 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-hwmon b/Documentation/ABI/testing/sysfs-class-hwmon new file mode 100644 index 000000000000..ea5a129ae082 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-hwmon @@ -0,0 +1,918 @@ +What: /sys/class/hwmon/hwmonX/name +Description: + The chip name. + This should be a short, lowercase string, not containing + whitespace, dashes, or the wildcard character '*'. + This attribute represents the chip name. It is the only + mandatory attribute. + I2C devices get this attribute created automatically. + + RO + +What: /sys/class/hwmon/hwmonX/update_interval +Description: + The interval at which the chip will update readings. + Unit: millisecond + + RW + + Some devices have a variable update rate or interval. + This attribute can be used to change it to the desired value. + +What: /sys/class/hwmon/hwmonX/inY_min +Description: + Voltage min value. + + Unit: millivolt + + RW + +What: /sys/class/hwmon/hwmonX/inY_lcrit +Description: + Voltage critical min value. + + Unit: millivolt + + RW + + If voltage drops to or below this limit, the system may + take drastic action such as power down or reset. At the very + least, it should report a fault. + +What: /sys/class/hwmon/hwmonX/inY_max +Description: + Voltage max value. + + Unit: millivolt + + RW + +What: /sys/class/hwmon/hwmonX/inY_crit +Description: + Voltage critical max value. + + Unit: millivolt + + RW + + If voltage reaches or exceeds this limit, the system may + take drastic action such as power down or reset. At the very + least, it should report a fault. + +What: /sys/class/hwmon/hwmonX/inY_input +Description: + Voltage input value. + + Unit: millivolt + + RO + + Voltage measured on the chip pin. + + Actual voltage depends on the scaling resistors on the + motherboard, as recommended in the chip datasheet. + + This varies by chip and by motherboard. + Because of this variation, values are generally NOT scaled + by the chip driver, and must be done by the application. + However, some drivers (notably lm87 and via686a) + do scale, because of internal resistors built into a chip. + These drivers will output the actual voltage. Rule of + thumb: drivers should report the voltage values at the + "pins" of the chip. + +What: /sys/class/hwmon/hwmonX/inY_average +Description: + Average voltage + + Unit: millivolt + + RO + +What: /sys/class/hwmon/hwmonX/inY_lowest +Description: + Historical minimum voltage + + Unit: millivolt + + RO + +What: /sys/class/hwmon/hwmonX/inY_highest +Description: + Historical maximum voltage + + Unit: millivolt + + RO + +What: /sys/class/hwmon/hwmonX/inY_reset_history +Description: + Reset inX_lowest and inX_highest + + WO + +What: /sys/class/hwmon/hwmonX/in_reset_history +Description: + Reset inX_lowest and inX_highest for all sensors + + WO + +What: /sys/class/hwmon/hwmonX/inY_label +Description: + Suggested voltage channel label. + + Text string + + Should only be created if the driver has hints about what + this voltage channel is being used for, and user-space + doesn't. In all other cases, the label is provided by + user-space. + + RO + +What: /sys/class/hwmon/hwmonX/inY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/cpuY_vid +Description: + CPU core reference voltage. + + Unit: millivolt + + RO + + Not always correct. + +What: /sys/class/hwmon/hwmonX/vrm +Description: + Voltage Regulator Module version number. + + RW (but changing it should no more be necessary) + + Originally the VRM standard version multiplied by 10, but now + an arbitrary number, as not all standards have a version + number. + + Affects the way the driver calculates the CPU core reference + voltage from the vid pins. + +What: /sys/class/hwmon/hwmonX/inY_rated_min +Description: + Minimum rated voltage. + + Unit: millivolt + + RO + +What: /sys/class/hwmon/hwmonX/inY_rated_max +Description: + Maximum rated voltage. + + Unit: millivolt + + RO + +What: /sys/class/hwmon/hwmonX/fanY_min +Description: + Fan minimum value + + Unit: revolution/min (RPM) + + RW + +What: /sys/class/hwmon/hwmonX/fanY_max +Description: + Fan maximum value + + Unit: revolution/min (RPM) + + Only rarely supported by the hardware. + RW + +What: /sys/class/hwmon/hwmonX/fanY_input +Description: + Fan input value. + + Unit: revolution/min (RPM) + + RO + +What: /sys/class/hwmon/hwmonX/fanY_div +Description: + Fan divisor. + + Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128). + + RW + + Some chips only support values 1, 2, 4 and 8. + Note that this is actually an internal clock divisor, which + affects the measurable speed range, not the read value. + +What: /sys/class/hwmon/hwmonX/fanY_pulses +Description: + Number of tachometer pulses per fan revolution. + + Integer value, typically between 1 and 4. + + RW + + This value is a characteristic of the fan connected to the + device's input, so it has to be set in accordance with the fan + model. + + Should only be created if the chip has a register to configure + the number of pulses. In the absence of such a register (and + thus attribute) the value assumed by all devices is 2 pulses + per fan revolution. + +What: /sys/class/hwmon/hwmonX/fanY_target +Description: + Desired fan speed + + Unit: revolution/min (RPM) + + RW + + Only makes sense if the chip supports closed-loop fan speed + control based on the measured fan speed. + +What: /sys/class/hwmon/hwmonX/fanY_label +Description: + Suggested fan channel label. + + Text string + + Should only be created if the driver has hints about what + this fan channel is being used for, and user-space doesn't. + In all other cases, the label is provided by user-space. + + RO + +What: /sys/class/hwmon/hwmonX/fanY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/pwmY +Description: + Pulse width modulation fan control. + + Integer value in the range 0 to 255 + + RW + + 255 is max or 100%. + +What: /sys/class/hwmon/hwmonX/pwmY_enable +Description: + Fan speed control method: + + - 0: no fan speed control (i.e. fan at full speed) + - 1: manual fan speed control enabled (using `pwmY`) + - 2+: automatic fan speed control enabled + + Check individual chip documentation files for automatic mode + details. + + RW + +What: /sys/class/hwmon/hwmonX/pwmY_mode +Description: + - 0: DC mode (direct current) + - 1: PWM mode (pulse-width modulation) + + RW + +What: /sys/class/hwmon/hwmonX/pwmY_freq +Description: + Base PWM frequency in Hz. + + Only possibly available when pwmN_mode is PWM, but not always + present even then. + + RW + +What: /sys/class/hwmon/hwmonX/pwmY_auto_channels_temp +Description: + Select which temperature channels affect this PWM output in + auto mode. + + Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc... + Which values are possible depend on the chip used. + + RW + +What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_pwm +What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp +What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp_hyst +Description: + Define the PWM vs temperature curve. + + Number of trip points is chip-dependent. Use this for chips + which associate trip points to PWM output channels. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_pwm +What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp +What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp_hyst +Description: + Define the PWM vs temperature curve. + + Number of trip points is chip-dependent. Use this for chips + which associate trip points to temperature channels. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_type +Description: + Sensor type selection. + + Integers 1 to 6 + + RW + + - 1: CPU embedded diode + - 2: 3904 transistor + - 3: thermal diode + - 4: thermistor + - 5: AMD AMDSI + - 6: Intel PECI + + Not all types are supported by all chips + +What: /sys/class/hwmon/hwmonX/tempY_max +Description: + Temperature max value. + + Unit: millidegree Celsius (or millivolt, see below) + + RW + +What: /sys/class/hwmon/hwmonX/tempY_min +Description: + Temperature min value. + + Unit: millidegree Celsius + + RW + +What: /sys/class/hwmon/hwmonX/tempY_max_hyst +Description: + Temperature hysteresis value for max limit. + + Unit: millidegree Celsius + + Must be reported as an absolute temperature, NOT a delta + from the max value. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_min_hyst +Description: + Temperature hysteresis value for min limit. + Unit: millidegree Celsius + + Must be reported as an absolute temperature, NOT a delta + from the min value. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_input +Description: + Temperature input value. + + Unit: millidegree Celsius + + RO + +What: /sys/class/hwmon/hwmonX/tempY_crit +Description: + Temperature critical max value, typically greater than + corresponding temp_max values. + + Unit: millidegree Celsius + + RW + +What: /sys/class/hwmon/hwmonX/tempY_crit_hyst +Description: + Temperature hysteresis value for critical limit. + + Unit: millidegree Celsius + + Must be reported as an absolute temperature, NOT a delta + from the critical value. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_emergency +Description: + Temperature emergency max value, for chips supporting more than + two upper temperature limits. Must be equal or greater than + corresponding temp_crit values. + + Unit: millidegree Celsius + + RW + +What: /sys/class/hwmon/hwmonX/tempY_emergency_hyst +Description: + Temperature hysteresis value for emergency limit. + + Unit: millidegree Celsius + + Must be reported as an absolute temperature, NOT a delta + from the emergency value. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_lcrit +Description: + Temperature critical min value, typically lower than + corresponding temp_min values. + + Unit: millidegree Celsius + + RW + +What: /sys/class/hwmon/hwmonX/tempY_lcrit_hyst +Description: + Temperature hysteresis value for critical min limit. + + Unit: millidegree Celsius + + Must be reported as an absolute temperature, NOT a delta + from the critical min value. + + RW + +What: /sys/class/hwmon/hwmonX/tempY_offset +Description: + Temperature offset which is added to the temperature reading + by the chip. + + Unit: millidegree Celsius + + Read/Write value. + +What: /sys/class/hwmon/hwmonX/tempY_label +Description: + Suggested temperature channel label. + + Text string + + Should only be created if the driver has hints about what + this temperature channel is being used for, and user-space + doesn't. In all other cases, the label is provided by + user-space. + + RO + +What: /sys/class/hwmon/hwmonX/tempY_lowest +Description: + Historical minimum temperature + + Unit: millidegree Celsius + + RO + +What: /sys/class/hwmon/hwmonX/tempY_highest +Description: + Historical maximum temperature + + Unit: millidegree Celsius + + RO + +What: /sys/class/hwmon/hwmonX/tempY_reset_history +Description: + Reset temp_lowest and temp_highest + + WO + +What: /sys/class/hwmon/hwmonX/temp_reset_history +Description: + Reset temp_lowest and temp_highest for all sensors + + WO + +What: /sys/class/hwmon/hwmonX/tempY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/tempY_rated_min +Description: + Minimum rated temperature. + + Unit: millidegree Celsius + + RO + +What: /sys/class/hwmon/hwmonX/tempY_rated_max +Description: + Maximum rated temperature. + + Unit: millidegree Celsius + + RO + +What: /sys/class/hwmon/hwmonX/currY_max +Description: + Current max value + + Unit: milliampere + + RW + +What: /sys/class/hwmon/hwmonX/currY_min +Description: + Current min value. + + Unit: milliampere + + RW + +What: /sys/class/hwmon/hwmonX/currY_lcrit +Description: + Current critical low value + + Unit: milliampere + + RW + +What: /sys/class/hwmon/hwmonX/currY_crit +Description: + Current critical high value. + + Unit: milliampere + + RW + +What: /sys/class/hwmon/hwmonX/currY_input +Description: + Current input value + + Unit: milliampere + + RO + +What: /sys/class/hwmon/hwmonX/currY_average +Description: + Average current use + + Unit: milliampere + + RO + +What: /sys/class/hwmon/hwmonX/currY_lowest +Description: + Historical minimum current + + Unit: milliampere + + RO + +What: /sys/class/hwmon/hwmonX/currY_highest +Description: + Historical maximum current + Unit: milliampere + RO + +What: /sys/class/hwmon/hwmonX/currY_reset_history +Description: + Reset currX_lowest and currX_highest + + WO + +What: /sys/class/hwmon/hwmonX/curr_reset_history +Description: + Reset currX_lowest and currX_highest for all sensors + + WO + +What: /sys/class/hwmon/hwmonX/currY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/currY_rated_min +Description: + Minimum rated current. + + Unit: milliampere + + RO + +What: /sys/class/hwmon/hwmonX/currY_rated_max +Description: + Maximum rated current. + + Unit: milliampere + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average +Description: + Average power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average_interval +Description: + Power use averaging interval. A poll + notification is sent to this file if the + hardware changes the averaging interval. + + Unit: milliseconds + + RW + +What: /sys/class/hwmon/hwmonX/powerY_average_interval_max +Description: + Maximum power use averaging interval + + Unit: milliseconds + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average_interval_min +Description: + Minimum power use averaging interval + + Unit: milliseconds + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average_highest +Description: + Historical average maximum power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average_lowest +Description: + Historical average minimum power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_average_max +Description: + A poll notification is sent to + `powerY_average` when power use + rises above this value. + + Unit: microWatt + + RW + +What: /sys/class/hwmon/hwmonX/powerY_average_min +Description: + A poll notification is sent to + `powerY_average` when power use + sinks below this value. + + Unit: microWatt + + RW + +What: /sys/class/hwmon/hwmonX/powerY_input +Description: + Instantaneous power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_input_highest +Description: + Historical maximum power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_input_lowest +Description: + Historical minimum power use + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_reset_history +Description: + Reset input_highest, input_lowest, + average_highest and average_lowest. + + WO + +What: /sys/class/hwmon/hwmonX/powerY_accuracy +Description: + Accuracy of the power meter. + + Unit: Percent + + RO + +What: /sys/class/hwmon/hwmonX/powerY_cap +Description: + 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 + +What: /sys/class/hwmon/hwmonX/powerY_cap_hyst +Description: + Margin of hysteresis built around capping and + notification. + + Unit: microWatt + + RW + +What: /sys/class/hwmon/hwmonX/powerY_cap_max +Description: + Maximum cap that can be set. + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_cap_min +Description: + Minimum cap that can be set. + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_max +Description: + Maximum power. + + Unit: microWatt + + RW + +What: /sys/class/hwmon/hwmonX/powerY_crit +Description: + Critical maximum power. + + If power rises to or above this limit, the + system is expected take drastic action to reduce + power consumption, such as a system shutdown or + a forced powerdown of some devices. + + Unit: microWatt + + RW + +What: /sys/class/hwmon/hwmonX/powerY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return + -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/powerY_rated_min +Description: + Minimum rated power. + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/powerY_rated_max +Description: + Maximum rated power. + + Unit: microWatt + + RO + +What: /sys/class/hwmon/hwmonX/energyY_input +Description: + Cumulative energy use + + Unit: microJoule + + RO + +What: /sys/class/hwmon/hwmonX/energyY_enable +Description: + Enable or disable the sensors. + + When disabled the sensor read will return + -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/humidityY_input +Description: + Humidity + + Unit: milli-percent (per cent mille, pcm) + + RO + + +What: /sys/class/hwmon/hwmonX/humidityY_enable +Description: + Enable or disable the sensors + + When disabled the sensor read will return + -ENODATA. + + - 1: Enable + - 0: Disable + + RW + +What: /sys/class/hwmon/hwmonX/humidityY_rated_min +Description: + Minimum rated humidity. + + Unit: milli-percent (per cent mille, pcm) + + RO + +What: /sys/class/hwmon/hwmonX/humidityY_rated_max +Description: + Maximum rated humidity. + + Unit: milli-percent (per cent mille, pcm) + + RO + + +What: /sys/class/hwmon/hwmonX/intrusionY_alarm +Description: + 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. + +What: /sys/class/hwmon/hwmonX/intrusionY_beep +Description: + Chassis intrusion beep + + - 0: disable + - 1: enable + + RW diff --git a/Documentation/hwmon/sysfs-interface.rst b/Documentation/hwmon/sysfs-interface.rst index 13c5acb72d63..85652a6aaa3e 100644 --- a/Documentation/hwmon/sysfs-interface.rst +++ b/Documentation/hwmon/sysfs-interface.rst @@ -89,6 +89,8 @@ hardware implementation. All entries (except name) are optional, and should only be created in a given driver if the chip has the feature. +See Documentation/ABI/testing/sysfs-class-hwmon for a complete description +of the attributes. ***************** Global attributes @@ -96,22 +98,9 @@ Global attributes `name` The chip name. - This should be a short, lowercase string, not containing - whitespace, dashes, or the wildcard character '*'. - This attribute represents the chip name. It is the only - mandatory attribute. - I2C devices get this attribute created automatically. - - RO `update_interval` The interval at which the chip will update readings. - Unit: millisecond - - RW - - Some devices have a variable update rate or interval. - This attribute can be used to change it to the desired value. ******** @@ -121,148 +110,51 @@ Voltages `in[0-*]_min` Voltage min value. - Unit: millivolt - - RW - `in[0-*]_lcrit` Voltage critical min value. - Unit: millivolt - - RW - - If voltage drops to or below this limit, the system may - take drastic action such as power down or reset. At the very - least, it should report a fault. - `in[0-*]_max` Voltage max value. - Unit: millivolt - - RW - `in[0-*]_crit` Voltage critical max value. - Unit: millivolt - - RW - - If voltage reaches or exceeds this limit, the system may - take drastic action such as power down or reset. At the very - least, it should report a fault. - `in[0-*]_input` Voltage input value. - Unit: millivolt - - RO - - Voltage measured on the chip pin. - - Actual voltage depends on the scaling resistors on the - motherboard, as recommended in the chip datasheet. - - This varies by chip and by motherboard. - Because of this variation, values are generally NOT scaled - by the chip driver, and must be done by the application. - However, some drivers (notably lm87 and via686a) - do scale, because of internal resistors built into a chip. - These drivers will output the actual voltage. Rule of - thumb: drivers should report the voltage values at the - "pins" of the chip. - `in[0-*]_average` Average voltage - Unit: millivolt - - RO - `in[0-*]_lowest` Historical minimum voltage - Unit: millivolt - - RO - `in[0-*]_highest` Historical maximum voltage - Unit: millivolt - - RO - `in[0-*]_reset_history` Reset inX_lowest and inX_highest - WO - `in_reset_history` Reset inX_lowest and inX_highest for all sensors - WO - `in[0-*]_label` Suggested voltage channel label. - Text string - - Should only be created if the driver has hints about what - this voltage channel is being used for, and user-space - doesn't. In all other cases, the label is provided by - user-space. - - RO - `in[0-*]_enable` Enable or disable the sensors. - When disabled the sensor read will return -ENODATA. - - - 1: Enable - - 0: Disable - - RW - `cpu[0-*]_vid` CPU core reference voltage. - Unit: millivolt - - RO - - Not always correct. - `vrm` Voltage Regulator Module version number. - RW (but changing it should no more be necessary) - - Originally the VRM standard version multiplied by 10, but now - an arbitrary number, as not all standards have a version - number. - - Affects the way the driver calculates the CPU core reference - voltage from the vid pins. - `in[0-*]_rated_min` Minimum rated voltage. - Unit: millivolt - - RO - `in[0-*]_rated_max` Maximum rated voltage. - Unit: millivolt - - RO - Also see the Alarms section for status flags associated with voltages. @@ -273,83 +165,27 @@ Fans `fan[1-*]_min` Fan minimum value - 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 - `fan[1-*]_div` Fan divisor. - Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128). - - RW - - Some chips only support values 1, 2, 4 and 8. - Note that this is actually an internal clock divisor, which - affects the measurable speed range, not the read value. - `fan[1-*]_pulses` Number of tachometer pulses per fan revolution. - Integer value, typically between 1 and 4. - - RW - - This value is a characteristic of the fan connected to the - device's input, so it has to be set in accordance with the fan - model. - - Should only be created if the chip has a register to configure - the number of pulses. In the absence of such a register (and - thus attribute) the value assumed by all devices is 2 pulses - per fan revolution. - `fan[1-*]_target` Desired fan speed - Unit: revolution/min (RPM) - - RW - - Only makes sense if the chip supports closed-loop fan speed - control based on the measured fan speed. - `fan[1-*]_label` Suggested fan channel label. - Text string - - Should only be created if the driver has hints about what - this fan channel is being used for, and user-space doesn't. - In all other cases, the label is provided by user-space. - - RO - `fan[1-*]_enable` Enable or disable the sensors. - When disabled the sensor read will return -ENODATA. - - - 1: Enable - - 0: Disable - - RW - Also see the Alarms section for status flags associated with fans. @@ -360,63 +196,25 @@ PWM `pwm[1-*]` Pulse width modulation fan control. - Integer value in the range 0 to 255 - - RW - - 255 is max or 100%. - `pwm[1-*]_enable` Fan speed control method: - - 0: no fan speed control (i.e. fan at full speed) - - 1: manual fan speed control enabled (using `pwm[1-*]`) - - 2+: automatic fan speed control enabled - - Check individual chip documentation files for automatic mode - details. - - RW - `pwm[1-*]_mode` - - 0: DC mode (direct current) - - 1: PWM mode (pulse-width modulation) - - RW + direct current or pulse-width modulation. `pwm[1-*]_freq` Base PWM frequency in Hz. - Only possibly available when pwmN_mode is PWM, but not always - present even then. - - RW - `pwm[1-*]_auto_channels_temp` Select which temperature channels affect this PWM output in auto mode. - Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc... - Which values are possible depend on the chip used. - - RW - `pwm[1-*]_auto_point[1-*]_pwm` / `pwm[1-*]_auto_point[1-*]_temp` / `pwm[1-*]_auto_point[1-*]_temp_hyst` Define the PWM vs temperature curve. - Number of trip points is chip-dependent. Use this for chips - which associate trip points to PWM output channels. - - RW - `temp[1-*]_auto_point[1-*]_pwm` / `temp[1-*]_auto_point[1-*]_temp` / `temp[1-*]_auto_point[1-*]_temp_hyst` Define the PWM vs temperature curve. - Number of trip points is chip-dependent. Use this for chips - which associate trip points 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 @@ -434,182 +232,70 @@ Temperatures `temp[1-*]_type` Sensor type selection. - Integers 1 to 6 - - RW - - - 1: CPU embedded diode - - 2: 3904 transistor - - 3: thermal diode - - 4: thermistor - - 5: AMD AMDSI - - 6: Intel PECI - - Not all types are supported by all chips - `temp[1-*]_max` Temperature max value. - Unit: millidegree Celsius (or millivolt, see below) - - RW - `temp[1-*]_min` Temperature min value. - Unit: millidegree Celsius - - RW - `temp[1-*]_max_hyst` Temperature hysteresis value for max limit. - Unit: millidegree Celsius - - Must be reported as an absolute temperature, NOT a delta - from the max value. - - RW - `temp[1-*]_min_hyst` Temperature hysteresis value for min limit. - Unit: millidegree Celsius - - Must be reported as an absolute temperature, NOT a delta - from the min value. - - RW `temp[1-*]_input` - Temperature input value. - - Unit: millidegree Celsius - - RO + Temperature input value. `temp[1-*]_crit` Temperature critical max value, typically greater than corresponding temp_max values. - Unit: millidegree Celsius - - RW - `temp[1-*]_crit_hyst` Temperature hysteresis value for critical limit. - Unit: millidegree Celsius - - Must be reported as an absolute temperature, NOT a delta - from the critical value. - - RW - `temp[1-*]_emergency` Temperature emergency max value, for chips supporting more than - two upper temperature limits. Must be equal or greater than - corresponding temp_crit values. - - Unit: millidegree Celsius - - RW + two upper temperature limits. `temp[1-*]_emergency_hyst` Temperature hysteresis value for emergency limit. - Unit: millidegree Celsius - - Must be reported as an absolute temperature, NOT a delta - from the emergency value. - - RW - `temp[1-*]_lcrit` Temperature critical min value, typically lower than corresponding temp_min values. - Unit: millidegree Celsius - - RW - `temp[1-*]_lcrit_hyst` Temperature hysteresis value for critical min limit. - Unit: millidegree Celsius - - Must be reported as an absolute temperature, NOT a delta - from the critical min value. - - RW - `temp[1-*]_offset` Temperature offset which is added to the temperature reading by the chip. - Unit: millidegree Celsius - - Read/Write value. - `temp[1-*]_label` Suggested temperature channel label. - Text string - - Should only be created if the driver has hints about what - this temperature channel is being used for, and user-space - doesn't. In all other cases, the label is provided by - 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 - `temp[1-*]_enable` Enable or disable the sensors. - When disabled the sensor read will return -ENODATA. - - - 1: Enable - - 0: Disable - - RW - `temp[1-*]_rated_min` Minimum rated temperature. - Unit: millidegree Celsius - - RO - `temp[1-*]_rated_max` Maximum rated temperature. - Unit: millidegree Celsius - - RO - 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 @@ -627,58 +313,28 @@ Currents ******** `curr[1-*]_max` - Current max value - - Unit: milliampere - - RW + Current max value. `curr[1-*]_min` Current min value. - Unit: milliampere - - RW - `curr[1-*]_lcrit` Current critical low value - Unit: milliampere - - RW - `curr[1-*]_crit` Current critical high value. - Unit: milliampere - - RW - `curr[1-*]_input` - Current input value - - Unit: milliampere - - RO + Current input value. `curr[1-*]_average` - Average current use - - Unit: milliampere - - RO + Average current use. `curr[1-*]_lowest` - Historical minimum current - - Unit: milliampere - - RO + Historical minimum current. `curr[1-*]_highest` - Historical maximum current - Unit: milliampere - RO + Historical maximum current. `curr[1-*]_reset_history` Reset currX_lowest and currX_highest @@ -686,34 +342,17 @@ Currents WO `curr_reset_history` - Reset currX_lowest and currX_highest for all sensors - - WO + Reset currX_lowest and currX_highest for all sensors. `curr[1-*]_enable` Enable or disable the sensors. - When disabled the sensor read will return -ENODATA. - - - 1: Enable - - 0: Disable - - RW - `curr[1-*]_rated_min` Minimum rated current. - Unit: milliampere - - RO - `curr[1-*]_rated_max` Maximum rated current. - Unit: milliampere - - RO - Also see the Alarms section for status flags associated with currents. ***** @@ -721,141 +360,62 @@ Power ***** `power[1-*]_average` - Average power use - - Unit: microWatt - - RO + Average power use. `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 use averaging interval. `power[1-*]_average_interval_max` - Maximum power use averaging interval - - Unit: milliseconds - - RO + Maximum power use averaging interval. `power[1-*]_average_interval_min` - Minimum power use averaging interval - - Unit: milliseconds - - RO + Minimum power use averaging interval. `power[1-*]_average_highest` - Historical average maximum power use - - Unit: microWatt - - RO + Historical average maximum power use `power[1-*]_average_lowest` - Historical average minimum power use - - Unit: microWatt - - RO + Historical average minimum power use `power[1-*]_average_max` - A poll notification is sent to - `power[1-*]_average` when power use - rises above this value. - - Unit: microWatt - - RW + A poll notification is sent to `power[1-*]_average` when + power use rises above this value. `power[1-*]_average_min` - A poll notification is sent to - `power[1-*]_average` when power use - sinks below this value. - - Unit: microWatt - - RW + A poll notification is sent to `power[1-*]_average` when + power use sinks below this value. `power[1-*]_input` - Instantaneous power use - - Unit: microWatt - - RO + Instantaneous power use. `power[1-*]_input_highest` - Historical maximum power use - - Unit: microWatt - - RO + Historical maximum power use `power[1-*]_input_lowest` - Historical minimum power use - - Unit: microWatt - - RO + Historical minimum power use. `power[1-*]_reset_history` - Reset input_highest, input_lowest, - average_highest and average_lowest. - - WO + Reset input_highest, input_lowest, average_highest and + average_lowest. `power[1-*]_accuracy` - Accuracy of the power meter. - - Unit: Percent - - RO + Accuracy of the power meter. `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 + If power use rises above this limit, the + system should take action to reduce power use. `power[1-*]_cap_hyst` - Margin of hysteresis built around capping and - notification. - - Unit: microWatt - - RW + Margin of hysteresis built around capping and notification. `power[1-*]_cap_max` - Maximum cap that can be set. - - Unit: microWatt - - RO + Maximum cap that can be set. `power[1-*]_cap_min` - Minimum cap that can be set. - - Unit: microWatt - - RO + Minimum cap that can be set. `power[1-*]_max` - Maximum power. - - Unit: microWatt - - RW + Maximum power. `power[1-*]_crit` Critical maximum power. @@ -923,37 +483,16 @@ Humidity ******** `humidity[1-*]_input` - Humidity - - Unit: milli-percent (per cent mille, pcm) - - RO - + Humidity. `humidity[1-*]_enable` - Enable or disable the sensors - - When disabled the sensor read will return - -ENODATA. - - - 1: Enable - - 0: Disable - - RW + Enable or disable the sensors. `humidity[1-*]_rated_min` - Minimum rated humidity. - - Unit: milli-percent (per cent mille, pcm) - - RO + Minimum rated humidity. `humidity[1-*]_rated_max` - Maximum rated humidity. - - Unit: milli-percent (per cent mille, pcm) - - RO + Maximum rated humidity. ****** Alarms @@ -1004,30 +543,15 @@ supports it. When this boolean has value 1, the measurement for that channel should not be trusted. `fan[1-*]_fault` / `temp[1-*]_fault` - Input fault condition - - - 0: no fault occurred - - 1: fault condition - - RO + Input fault condition. Some chips also offer the possibility to get beeped when an alarm occurs: `beep_enable` - Master beep enable - - - 0: no beeps - - 1: beeps - - RW + Master beep enable. `in[0-*]_beep`, `curr[1-*]_beep`, `fan[1-*]_beep`, `temp[1-*]_beep`, - Channel beep - - - 0: disable - - 1: enable - - RW + Channel beep. In theory, a chip could provide per-limit beep masking, but no such chip was seen so far. @@ -1039,29 +563,8 @@ for compatibility reasons: `alarms` Alarm bitmask. - RO - - Integer representation of one to four bytes. - - A '1' bit means an alarm. - - Chips should be programmed for 'comparator' mode so that - the alarm will 'come back' after you read the register - if it is still valid. - - Generally a direct representation of a chip's internal - alarm registers; there is no standard for the position - of individual bits. For this reason, the use of this - interface file for new drivers is discouraged. Use - `individual *_alarm` and `*_fault` files instead. - Bits are defined in kernel/include/sensors.h. - `beep_mask` Bitmask for beep. - Same format as 'alarms' with the same bit locations, - use discouraged for the same reason. Use individual - `*_beep` files instead. - RW ******************* @@ -1069,25 +572,10 @@ 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. + Chassis intrusion detection. `intrusion[0-*]_beep` - Chassis intrusion beep - - 0: disable - 1: enable - - RW + Chassis intrusion beep. **************************** Average sample configuration diff --git a/MAINTAINERS b/MAINTAINERS index 8f49669e59c3..14d5ef3c4336 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8215,6 +8215,7 @@ L: linux-hwmon@vger.kernel.org S: Maintained W: http://hwmon.wiki.kernel.org/ T: git git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git +F: Documentation/ABI/testing/sysfs-class-hwmon F: Documentation/devicetree/bindings/hwmon/ F: Documentation/hwmon/ F: drivers/hwmon/ |