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195 lines
6.1 KiB
195 lines
6.1 KiB
Kernel driver max34440 |
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====================== |
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Supported chips: |
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* Maxim MAX34440 |
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Prefixes: 'max34440' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34440.pdf |
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* Maxim MAX34441 |
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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller |
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Prefixes: 'max34441' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34441.pdf |
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* Maxim MAX34446 |
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PMBus Power-Supply Data Logger |
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Prefixes: 'max34446' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34446.pdf |
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* Maxim MAX34451 |
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PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer |
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Prefixes: 'max34451' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34451.pdf |
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* Maxim MAX34460 |
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PMBus 12-Channel Voltage Monitor & Sequencer |
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Prefix: 'max34460' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34460.pdf |
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* Maxim MAX34461 |
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PMBus 16-Channel Voltage Monitor & Sequencer |
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Prefix: 'max34461' |
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Addresses scanned: - |
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX34461.pdf |
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Author: Guenter Roeck <[email protected]> |
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Description |
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----------- |
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This driver supports hardware monitoring for Maxim MAX34440 PMBus 6-Channel |
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Power-Supply Manager, MAX34441 PMBus 5-Channel Power-Supply Manager |
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and Intelligent Fan Controller, and MAX34446 PMBus Power-Supply Data Logger. |
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It also supports the MAX34451, MAX34460, and MAX34461 PMBus Voltage Monitor & |
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Sequencers. The MAX34451 supports monitoring voltage or current of 12 channels |
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based on GIN pins. The MAX34460 supports 12 voltage channels, and the MAX34461 |
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supports 16 voltage channels. |
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The driver is a client driver to the core PMBus driver. Please see |
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Documentation/hwmon/pmbus.rst for details on PMBus client drivers. |
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Usage Notes |
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----------- |
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This driver does not auto-detect devices. You will have to instantiate the |
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for |
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details. |
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For MAX34446, the value of the currX_crit attribute determines if current or |
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voltage measurement is enabled for a given channel. Voltage measurement is |
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enabled if currX_crit is set to 0; current measurement is enabled if the |
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attribute is set to a positive value. Power measurement is only enabled if |
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channel 1 (3) is configured for voltage measurement, and channel 2 (4) is |
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configured for current measurement. |
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Platform data support |
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--------------------- |
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The driver supports standard PMBus driver platform data. |
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Sysfs entries |
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------------- |
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The following attributes are supported. Limits are read-write; all other |
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attributes are read-only. |
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In |
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~~ |
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======================= ======================================================= |
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in[1-6]_label "vout[1-6]". |
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in[1-6]_input Measured voltage. From READ_VOUT register. |
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in[1-6]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register. |
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in[1-6]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register. |
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in[1-6]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register. |
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in[1-6]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT |
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register. |
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in[1-6]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status. |
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in[1-6]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status. |
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in[1-6]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT |
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status. |
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in[1-6]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT |
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status. |
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in[1-6]_lowest Historical minimum voltage. |
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in[1-6]_highest Historical maximum voltage. |
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in[1-6]_reset_history Write any value to reset history. |
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======================= ======================================================= |
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.. note:: MAX34446 only supports in[1-4]. |
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Curr |
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~~~~ |
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======================= ======================================================== |
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curr[1-6]_label "iout[1-6]". |
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curr[1-6]_input Measured current. From READ_IOUT register. |
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curr[1-6]_max Maximum current. From IOUT_OC_WARN_LIMIT register. |
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curr[1-6]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT |
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register. |
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curr[1-6]_max_alarm Current high alarm. From IOUT_OC_WARNING status. |
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curr[1-6]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status. |
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curr[1-4]_average Historical average current (MAX34446/34451 only). |
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curr[1-6]_highest Historical maximum current. |
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curr[1-6]_reset_history Write any value to reset history. |
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======================= ======================================================== |
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.. note:: |
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- in6 and curr6 attributes only exist for MAX34440. |
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- MAX34446 only supports curr[1-4]. |
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Power |
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~~~~~ |
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======================= ======================================================== |
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power[1,3]_label "pout[1,3]" |
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power[1,3]_input Measured power. |
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power[1,3]_average Historical average power. |
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power[1,3]_highest Historical maximum power. |
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======================= ======================================================== |
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.. note:: Power attributes only exist for MAX34446. |
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Temp |
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~~~~ |
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======================= ======================================================== |
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temp[1-8]_input Measured temperatures. From READ_TEMPERATURE_1 register. |
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temp1 is the chip's internal temperature. temp2..temp5 |
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are remote I2C temperature sensors. For MAX34441, temp6 |
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is a remote thermal-diode sensor. For MAX34440, temp6..8 |
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are remote I2C temperature sensors. |
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temp[1-8]_max Maximum temperature. From OT_WARN_LIMIT register. |
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temp[1-8]_crit Critical high temperature. From OT_FAULT_LIMIT register. |
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temp[1-8]_max_alarm Temperature high alarm. |
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temp[1-8]_crit_alarm Temperature critical high alarm. |
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temp[1-8]_average Historical average temperature (MAX34446 only). |
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temp[1-8]_highest Historical maximum temperature. |
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temp[1-8]_reset_history Write any value to reset history. |
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======================= ======================================================== |
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.. note:: |
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- temp7 and temp8 attributes only exist for MAX34440. |
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- MAX34446 only supports temp[1-3]. |
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.. note:: |
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- MAX34451 supports attribute groups in[1-16] (or curr[1-16] based on |
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input pins) and temp[1-5]. |
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- MAX34460 supports attribute groups in[1-12] and temp[1-5]. |
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- MAX34461 supports attribute groups in[1-16] and temp[1-5].
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