149 lines
4.4 KiB
ReStructuredText
149 lines
4.4 KiB
ReStructuredText
Kernel driver adm1275
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=====================
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Supported chips:
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* Analog Devices ADM1075
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Prefix: 'adm1075'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf
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* Analog Devices ADM1272
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Prefix: 'adm1272'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1272.pdf
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* Analog Devices ADM1275
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Prefix: 'adm1275'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf
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* Analog Devices ADM1276
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Prefix: 'adm1276'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf
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* Analog Devices ADM1278
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Prefix: 'adm1278'
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Addresses scanned: -
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Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1278.pdf
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* Analog Devices ADM1293/ADM1294
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Prefix: 'adm1293', 'adm1294'
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Addresses scanned: -
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Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1293_1294.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver supports hardware monitoring for Analog Devices ADM1075, ADM1272,
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ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and
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Digital Power Monitors.
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ADM1075, ADM1272, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 are hot-swap
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controllers that allow a circuit board to be removed from or inserted into
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a live backplane. They also feature current and voltage readback via an
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integrated 12 bit analog-to-digital converter (ADC), accessed using a
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PMBus interface.
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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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The ADM1075, unlike many other PMBus devices, does not support internal voltage
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or current scaling. Reported voltages, currents, and power are raw measurements,
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and will typically have to be scaled.
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The shunt value in micro-ohms can be set via device tree at compile-time. Please
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refer to the Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml for bindings
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if the device tree is used.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data. Please see
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Documentation/hwmon/pmbus.rst for details.
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Sysfs entries
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-------------
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The following attributes are supported. Limits are read-write, history reset
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attributes are write-only, all other attributes are read-only.
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======================= =======================================================
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inX_label "vin1" or "vout1" depending on chip variant and
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configuration. On ADM1075, ADM1293, and ADM1294,
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vout1 reports the voltage on the VAUX pin.
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inX_input Measured voltage.
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inX_min Minimum Voltage.
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inX_max Maximum voltage.
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inX_min_alarm Voltage low alarm.
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inX_max_alarm Voltage high alarm.
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inX_highest Historical maximum voltage.
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inX_reset_history Write any value to reset history.
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curr1_label "iout1"
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curr1_input Measured current.
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curr1_max Maximum current.
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curr1_max_alarm Current high alarm.
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curr1_lcrit Critical minimum current. Depending on the chip
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configuration, either curr1_lcrit or curr1_crit is
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supported, but not both.
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curr1_lcrit_alarm Critical current low alarm.
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curr1_crit Critical maximum current. Depending on the chip
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configuration, either curr1_lcrit or curr1_crit is
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supported, but not both.
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curr1_crit_alarm Critical current high alarm.
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curr1_highest Historical maximum current.
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curr1_reset_history Write any value to reset history.
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power1_label "pin1"
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power1_input Input power.
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power1_input_lowest Lowest observed input power. ADM1293 and ADM1294 only.
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power1_input_highest Highest observed input power.
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power1_reset_history Write any value to reset history.
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Power attributes are supported on ADM1075, ADM1272,
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ADM1276, ADM1293, and ADM1294.
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temp1_input Chip temperature.
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temp1_max Maximum chip temperature.
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temp1_max_alarm Temperature alarm.
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temp1_crit Critical chip temperature.
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temp1_crit_alarm Critical temperature high alarm.
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temp1_highest Highest observed temperature.
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temp1_reset_history Write any value to reset history.
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Temperature attributes are supported on ADM1272 and
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ADM1278.
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======================= =======================================================
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