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diff --git a/Documentation/hwmon/max34440.rst b/Documentation/hwmon/max34440.rst new file mode 100644 index 0000000000..162d289f08 --- /dev/null +++ b/Documentation/hwmon/max34440.rst @@ -0,0 +1,195 @@ +Kernel driver max34440 +====================== + +Supported chips: + + * Maxim MAX34440 + + Prefixes: 'max34440' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34440.pdf + + * Maxim MAX34441 + + PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller + + Prefixes: 'max34441' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34441.pdf + + * Maxim MAX34446 + + PMBus Power-Supply Data Logger + + Prefixes: 'max34446' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34446.pdf + + * Maxim MAX34451 + + PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer + + Prefixes: 'max34451' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34451.pdf + + * Maxim MAX34460 + + PMBus 12-Channel Voltage Monitor & Sequencer + + Prefix: 'max34460' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34460.pdf + + * Maxim MAX34461 + + PMBus 16-Channel Voltage Monitor & Sequencer + + Prefix: 'max34461' + + Addresses scanned: - + + Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34461.pdf + +Author: Guenter Roeck <linux@roeck-us.net> + + +Description +----------- + +This driver supports hardware monitoring 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. +It also supports the MAX34451, MAX34460, and MAX34461 PMBus Voltage Monitor & +Sequencers. The MAX34451 supports monitoring voltage or current of 12 channels +based on GIN pins. The MAX34460 supports 12 voltage channels, and the MAX34461 +supports 16 voltage channels. + +The driver is a client driver to the core PMBus driver. Please see +Documentation/hwmon/pmbus.rst 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.rst 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 +~~ + +======================= ======================================================= +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. +======================= ======================================================= + +.. note:: MAX34446 only supports in[1-4]. + +Curr +~~~~ + +======================= ======================================================== +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 (MAX34446/34451 only). +curr[1-6]_highest Historical maximum current. +curr[1-6]_reset_history Write any value to reset history. +======================= ======================================================== + +.. note:: + + - in6 and curr6 attributes only exist for MAX34440. + - MAX34446 only supports curr[1-4]. + +Power +~~~~~ + +======================= ======================================================== +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. +======================= ======================================================== + +.. note:: Power attributes only exist for MAX34446. + +Temp +~~~~ + +======================= ======================================================== +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. +======================= ======================================================== + + +.. note:: + - temp7 and temp8 attributes only exist for MAX34440. + - MAX34446 only supports temp[1-3]. + + +.. note:: + + - MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on + input pins) and temp[1-5]. + - MAX34460 supports attribute groups in[1-12] and temp[1-5]. + - MAX34461 supports attribute groups in[1-16] and temp[1-5]. |