103 lines
4.0 KiB
ReStructuredText
103 lines
4.0 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0-only
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Kernel driver Ampere(R)'s Altra(R) SMpro hwmon
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==============================================
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Supported chips:
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* Ampere(R) Altra(R)
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Prefix: ``smpro``
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Reference: `Altra SoC BMC Interface Specification`
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Author: Thu Nguyen <thu@os.amperecomputing.com>
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Description
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-----------
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The smpro-hwmon driver supports hardware monitoring for Ampere(R) Altra(R)
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SoCs based on the SMpro co-processor (SMpro). The following sensor metrics
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are supported by the driver:
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* temperature
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* voltage
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* current
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* power
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The interface provides the registers to query the various sensors and
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their values which are then exported to userspace by this driver.
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Usage Notes
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-----------
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The driver creates at least two sysfs files for each sensor.
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* ``<sensor_type><idx>_label`` reports the sensor label.
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* ``<sensor_type><idx>_input`` returns the sensor value.
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The sysfs files are allocated in the SMpro rootfs folder, with one root
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directory for each instance.
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When the SoC is turned off, the driver will fail to read registers and
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return ``-ENXIO``.
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Sysfs entries
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-------------
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The following sysfs files are supported:
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* Ampere(R) Altra(R):
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============ ============= ====== ===============================================
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Name Unit Perm Description
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============ ============= ====== ===============================================
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temp1_input millicelsius RO SoC temperature
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temp2_input millicelsius RO Max temperature reported among SoC VRDs
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temp2_crit millicelsius RO SoC VRD HOT Threshold temperature
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temp3_input millicelsius RO Max temperature reported among DIMM VRDs
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temp4_input millicelsius RO Max temperature reported among Core VRDs
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temp5_input millicelsius RO Temperature of DIMM0 on CH0
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temp5_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp6_input millicelsius RO Temperature of DIMM0 on CH1
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temp6_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp7_input millicelsius RO Temperature of DIMM0 on CH2
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temp7_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp8_input millicelsius RO Temperature of DIMM0 on CH3
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temp8_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp9_input millicelsius RO Temperature of DIMM0 on CH4
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temp9_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp10_input millicelsius RO Temperature of DIMM0 on CH5
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temp10_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp11_input millicelsius RO Temperature of DIMM0 on CH6
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temp11_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp12_input millicelsius RO Temperature of DIMM0 on CH7
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temp12_crit millicelsius RO MEM HOT Threshold for all DIMMs
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temp13_input millicelsius RO Max temperature reported among RCA VRDs
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in0_input millivolts RO Core voltage
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in1_input millivolts RO SoC voltage
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in2_input millivolts RO DIMM VRD1 voltage
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in3_input millivolts RO DIMM VRD2 voltage
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in4_input millivolts RO RCA VRD voltage
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cur1_input milliamperes RO Core VRD current
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cur2_input milliamperes RO SoC VRD current
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cur3_input milliamperes RO DIMM VRD1 current
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cur4_input milliamperes RO DIMM VRD2 current
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cur5_input milliamperes RO RCA VRD current
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power1_input microwatts RO Core VRD power
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power2_input microwatts RO SoC VRD power
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power3_input microwatts RO DIMM VRD1 power
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power4_input microwatts RO DIMM VRD2 power
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power5_input microwatts RO RCA VRD power
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============ ============= ====== ===============================================
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Example::
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# cat in0_input
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830
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# cat temp1_input
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37000
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# cat curr1_input
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9000
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# cat power5_input
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19500000
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