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Diffstat (limited to 'kernel/Documentation/hwmon/adm1275')
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diff --git a/kernel/Documentation/hwmon/adm1275 b/kernel/Documentation/hwmon/adm1275 new file mode 100644 index 000000000..15b4a20d5 --- /dev/null +++ b/kernel/Documentation/hwmon/adm1275 @@ -0,0 +1,92 @@ +Kernel driver adm1275 +===================== + +Supported chips: + * Analog Devices ADM1075 + Prefix: 'adm1075' + Addresses scanned: - + Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf + * Analog Devices ADM1275 + Prefix: 'adm1275' + Addresses scanned: - + Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf + * Analog Devices ADM1276 + Prefix: 'adm1276' + Addresses scanned: - + Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf + +Author: Guenter Roeck <linux@roeck-us.net> + + +Description +----------- + +This driver supports hardware montoring for Analog Devices ADM1075, ADM1275, +and ADM1276 Hot-Swap Controller and Digital Power Monitor. + +ADM1075, ADM1275, and ADM1276 are hot-swap controllers that allow a circuit +board to be removed from or inserted into a live backplane. They also feature +current and voltage readback via an integrated 12-bit analog-to-digital +converter (ADC), accessed using a PMBus interface. + +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. + +The ADM1075, unlike many other PMBus devices, does not support internal voltage +or current scaling. Reported voltages, currents, and power are raw measurements, +and will typically have to be scaled. + + +Platform data support +--------------------- + +The driver supports standard PMBus driver platform data. Please see +Documentation/hwmon/pmbus for details. + + +Sysfs entries +------------- + +The following attributes are supported. Limits are read-write, history reset +attributes are write-only, all other attributes are read-only. + +in1_label "vin1" or "vout1" depending on chip variant and + configuration. On ADM1075, vout1 reports the voltage on + the VAUX pin. +in1_input Measured voltage. +in1_min Minimum Voltage. +in1_max Maximum voltage. +in1_min_alarm Voltage low alarm. +in1_max_alarm Voltage high alarm. +in1_highest Historical maximum voltage. +in1_reset_history Write any value to reset history. + +curr1_label "iout1" +curr1_input Measured current. +curr1_max Maximum current. +curr1_max_alarm Current high alarm. +curr1_lcrit Critical minimum current. Depending on the chip + configuration, either curr1_lcrit or curr1_crit is + supported, but not both. +curr1_lcrit_alarm Critical current low alarm. +curr1_crit Critical maximum current. Depending on the chip + configuration, either curr1_lcrit or curr1_crit is + supported, but not both. +curr1_crit_alarm Critical current high alarm. +curr1_highest Historical maximum current. +curr1_reset_history Write any value to reset history. + +power1_label "pin1" +power1_input Input power. +power1_reset_history Write any value to reset history. + + Power attributes are supported on ADM1075 and ADM1276 + only. |