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- Kernel driver max34440
- ======================
- Supported chips:
- * Maxim MAX34440
- Prefixes: 'max34440'
- Addresses scanned: -
- Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34440.pdf
- * Maxim MAX34441
- PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller
- Prefixes: 'max34441'
- Addresses scanned: -
- Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34441.pdf
- * Maxim MAX34446
- PMBus Power-Supply Data Logger
- Prefixes: 'max34446'
- Addresses scanned: -
- Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX34446.pdf
- Author: Guenter Roeck <guenter.roeck@ericsson.com>
- Description
- -----------
- This driver supports hardware montoring for Maxim MAX34440 PMBus 6-Channel
- Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager
- and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger.
- The driver is a client driver to the core PMBus driver. Please see
- Documentation/hwmon/pmbus for details on PMBus client drivers.
- Usage Notes
- -----------
- This driver does not auto-detect devices. You will have to instantiate the
- devices explicitly. Please see Documentation/i2c/instantiating-devices for
- details.
- For MAX34446, the value of the currX_crit attribute determines if current or
- voltage measurement is enabled for a given channel. Voltage measurement is
- enabled if currX_crit is set to 0; current measurement is enabled if the
- attribute is set to a positive value. Power measurement is only enabled if
- channel 1 (3) is configured for voltage measurement, and channel 2 (4) is
- configured for current measurement.
- Platform data support
- ---------------------
- The driver supports standard PMBus driver platform data.
- Sysfs entries
- -------------
- The following attributes are supported. Limits are read-write; all other
- attributes are read-only.
- in[1-6]_label "vout[1-6]".
- in[1-6]_input Measured voltage. From READ_VOUT register.
- in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
- in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
- in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
- in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
- in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
- in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
- in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
- in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
- in[1-6]_lowest Historical minimum voltage.
- in[1-6]_highest Historical maximum voltage.
- in[1-6]_reset_history Write any value to reset history.
- MAX34446 only supports in[1-4].
- curr[1-6]_label "iout[1-6]".
- curr[1-6]_input Measured current. From READ_IOUT register.
- curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
- curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
- curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
- curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
- curr[1-4]_average Historical average current (MAX34446 only).
- curr[1-6]_highest Historical maximum current.
- curr[1-6]_reset_history Write any value to reset history.
- in6 and curr6 attributes only exist for MAX34440.
- MAX34446 only supports curr[1-4].
- power[1,3]_label "pout[1,3]"
- power[1,3]_input Measured power.
- power[1,3]_average Historical average power.
- power[1,3]_highest Historical maximum power.
- Power attributes only exist for MAX34446.
- temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register.
- temp1 is the chip's internal temperature. temp2..temp5
- are remote I2C temperature sensors. For MAX34441, temp6
- is a remote thermal-diode sensor. For MAX34440, temp6..8
- are remote I2C temperature sensors.
- temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register.
- temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register.
- temp[1-8]_max_alarm Temperature high alarm.
- temp[1-8]_crit_alarm Temperature critical high alarm.
- temp[1-8]_average Historical average temperature (MAX34446 only).
- temp[1-8]_highest Historical maximum temperature.
- temp[1-8]_reset_history Write any value to reset history.
- temp7 and temp8 attributes only exist for MAX34440.
- MAX34446 only supports temp[1-3].
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