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 ADM1272
Prefix: ‘adm1272’
Addresses scanned: -
Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1272.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
Analog Devices ADM1278
Prefix: ‘adm1278’
Addresses scanned: -
Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1278.pdf
Analog Devices ADM1293/ADM1294
Prefix: ‘adm1293’, ‘adm1294’
Addresses scanned: -
Datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/ADM1293_1294.pdf
Author: Guenter Roeck <linux@roeck-us.net>
Description¶
This driver supports hardware monitoring for Analog Devices ADM1075, ADM1272, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 Hot-Swap Controller and Digital Power Monitors.
ADM1075, ADM1272, ADM1275, ADM1276, ADM1278, ADM1293, and ADM1294 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.rst 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.
The shunt value in micro-ohms can be set via device tree at compile-time. Please refer to the Documentation/devicetree/bindings/hwmon/adm1275.txt for bindings if the device tree is used.
Platform data support¶
The driver supports standard PMBus driver platform data. Please see Documentation/hwmon/pmbus.rst 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.
| inX_label | “vin1” or “vout1” depending on chip variant and configuration. On ADM1075, ADM1293, and ADM1294, vout1 reports the voltage on the VAUX pin. |
| inX_input | Measured voltage. |
| inX_min | Minimum Voltage. |
| inX_max | Maximum voltage. |
| inX_min_alarm | Voltage low alarm. |
| inX_max_alarm | Voltage high alarm. |
| inX_highest | Historical maximum voltage. |
| inX_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_input_lowest | Lowest observed input power. ADM1293 and ADM1294 only. |
| power1_input_highest | Highest observed input power. |
| power1_reset_history | Write any value to reset history. Power attributes are supported on ADM1075, ADM1272, ADM1276, ADM1293, and ADM1294. |
| temp1_input | Chip temperature. |
| temp1_max | Maximum chip temperature. |
| temp1_max_alarm | Temperature alarm. |
| temp1_crit | Critical chip temperature. |
| temp1_crit_alarm | Critical temperature high alarm. |
| temp1_highest | Highest observed temperature. |
| temp1_reset_history | Write any value to reset history. Temperature attributes are supported on ADM1272 and ADM1278. |