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c5e6763667
ADM1275 supports a second current limit, which can be configured as either lower or upper limit. Add support for it and report it as either lower or upper critical current limit. Also replace error return code EINVAL for unsupported pages with ENXIO as this is more appropriate for the observed condition. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Acked-by: Jean Delvare <khali@linux-fr.org>
72 lines
2.4 KiB
Text
72 lines
2.4 KiB
Text
Kernel driver adm1275
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=====================
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Supported chips:
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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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Author: Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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This driver supports hardware montoring for Analog Devices ADM1275 Hot-Swap
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Controller and Digital Power Monitor.
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The ADM1275 is a hot-swap controller that allows a circuit board to be removed
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from or inserted into a live backplane. It also features current and voltage
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readback via an integrated 12-bit analog-to-digital converter (ADC), accessed
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using a 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 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 for
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details.
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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 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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in1_label "vin1" or "vout1" depending on chip variant and
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configuration.
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in1_input Measured voltage. From READ_VOUT register.
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in1_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
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in1_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
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in1_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
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in1_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
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in1_highest Historical maximum voltage.
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in1_reset_history Write any value to reset history.
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curr1_label "iout1"
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curr1_input Measured current. From READ_IOUT register.
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curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register.
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curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT register.
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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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