127 lines
4.9 KiB
Text
127 lines
4.9 KiB
Text
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].
|