| Kernel driver max34440 | |
| ====================== | |
| Supported chips: | |
| * Maxim MAX34440 | |
| Prefixes: 'max34440' | |
| Addresses scanned: - | |
| Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34440.pdf | |
| * Maxim MAX34441 | |
| PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller | |
| Prefixes: 'max34441' | |
| Addresses scanned: - | |
| Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34441.pdf | |
| * Maxim MAX34446 | |
| PMBus Power-Supply Data Logger | |
| Prefixes: 'max34446' | |
| Addresses scanned: - | |
| Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34446.pdf | |
| * Maxim MAX34460 | |
| PMBus 12-Channel Voltage Monitor & Sequencer | |
| Prefix: 'max34460' | |
| Addresses scanned: - | |
| Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX34460.pdf | |
| * Maxim MAX34461 | |
| PMBus 16-Channel Voltage Monitor & Sequencer | |
| Prefix: 'max34461' | |
| Addresses scanned: - | |
| Datasheet: http://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 MAX34460 and MAX34461 PMBus Voltage Monitor & Sequencers. | |
| 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 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]. | |
| MAX34460 supports attribute groups in[1-12] and temp[1-5]. | |
| MAX34461 supports attribute groups in[1-16] and temp[1-5]. |