91 lines
2.8 KiB
ReStructuredText
91 lines
2.8 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver stpddc60
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======================
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Supported chips:
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* ST STPDDC60
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Prefix: 'stpddc60', 'bmr481'
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Addresses scanned: -
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Datasheet: https://flexpowermodules.com/documents/fpm-techspec-bmr481
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Author: Erik Rosen <erik.rosen@metormote.com>
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Description
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-----------
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This driver supports hardware monitoring for ST STPDDC60 controller chip and
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compatible modules.
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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 and Documentation.hwmon/pmbus-core for details
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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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The vout under- and over-voltage limits are set in relation to the commanded
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output voltage as a positive or negative offset in the interval 50mV to 400mV
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in 50mV steps. This means that the absolute values of the limits will change
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when the commanded output voltage changes. Also, care should be taken when
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writing to those limits since in the worst case the commanded output voltage
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could change at the same time as the limit is written to, wich will lead to
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unpredictable results.
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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. Vin, iout, pout and temp limits
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are read-write; all other attributes are read-only.
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======================= ========================================================
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in1_label "vin"
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in1_input Measured input voltage.
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in1_lcrit Critical minimum input voltage.
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in1_crit Critical maximum input voltage.
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in1_lcrit_alarm Input voltage critical low alarm.
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in1_crit_alarm Input voltage critical high alarm.
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in2_label "vout1"
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in2_input Measured output voltage.
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in2_lcrit Critical minimum output voltage.
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in2_crit Critical maximum output voltage.
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in2_lcrit_alarm Critical output voltage critical low alarm.
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in2_crit_alarm Critical output voltage critical high alarm.
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curr1_label "iout1"
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curr1_input Measured output current.
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curr1_max Maximum output current.
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curr1_max_alarm Output current high alarm.
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curr1_crit Critical maximum output current.
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curr1_crit_alarm Output current critical high alarm.
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power1_label "pout1"
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power1_input Measured output power.
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power1_crit Critical maximum output power.
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power1_crit_alarm Output power critical high alarm.
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temp1_input Measured maximum temperature of all phases.
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temp1_max Maximum temperature limit.
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temp1_max_alarm High temperature alarm.
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temp1_crit Critical maximum temperature limit.
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temp1_crit_alarm Critical maximum temperature alarm.
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======================= ========================================================
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