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Nguyen" , Phong Vo Errors-To: openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Sender: "openbmc" Add documentation for the Ampere(R)'s Altra(R) SMpro hwmon driver. Signed-off-by: Thu Nguyen Signed-off-by: Quan Nguyen Reviewed-by: Guenter Roeck --- Changes in v5: + None Changes in v4: + None Changes in v3: + None Changes in v2: + Removed "virtual" sensors [Guenter] + Fixed typo "mili" to "milli", "nanoWatt" to "microWatt" [Guenter] + Reported SOC_TDP as "Socket TDP" using max attributes [Guenter] + Clarified "highest" meaning in documentation [Guenter] + Reported MEM HOT Threshold for all DIMMs as temp*_crit [Guenter] + Removed Socket TDP sensor [Quan] + Included sensor type and channel in labels [Quan] Documentation/hwmon/index.rst | 1 + Documentation/hwmon/smpro-hwmon.rst | 101 ++++++++++++++++++++++++++++ 2 files changed, 102 insertions(+) create mode 100644 Documentation/hwmon/smpro-hwmon.rst diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index bc01601ea81a..b6579882f51b 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -172,6 +172,7 @@ Hardware Monitoring Kernel Drivers sis5595 sl28cpld smm665 + smpro-hwmon smsc47b397 smsc47m192 smsc47m1 diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst new file mode 100644 index 000000000000..f978b1370e16 --- /dev/null +++ b/Documentation/hwmon/smpro-hwmon.rst @@ -0,0 +1,101 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon +============================================== + +Supported chips: + + * Ampere(R) Altra(R) + + Prefix: 'smpro' + + Reference: Altra SoC BMC Interface Specification + +Author: Thu Nguyen + +Description +----------- +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the +SMpro co-processor (SMpro). +The following sensor types are supported by the driver: + + * temperature + * voltage + * current + * power + +The SMpro interface provides the registers to query the various sensors and +their values which are then exported to userspace by this driver. + +Usage Notes +----------- + +SMpro hwmon driver creates at least two sysfs files for each sensor. + +* File ``_label`` reports the sensor label. +* File ``_input`` returns the sensor value. + +The sysfs files are allocated in the SMpro root fs folder. +There is one root folder for each SMpro instance. + +When the SoC is turned off, the driver will fail to read registers +and return -ENXIO. + +Sysfs entries +------------- + +The following sysfs files are supported: + +* Ampere(R) Altra(R): + +============ ============= ====== =============================================== +Name Unit Perm Description +temp1_input milli Celsius RO SoC temperature +temp2_input milli Celsius RO Max temperature reported among SoC VRDs +temp2_crit milli Celsius RO SoC VRD HOT Threshold temperature +temp3_input milli Celsius RO Max temperature reported among DIMM VRDs +temp4_input milli Celsius RO Max temperature reported among Core VRDs +temp5_input milli Celsius RO Temperature of DIMM0 on CH0 +temp5_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp6_input milli Celsius RO Temperature of DIMM0 on CH1 +temp6_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp7_input milli Celsius RO Temperature of DIMM0 on CH2 +temp7_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp8_input milli Celsius RO Temperature of DIMM0 on CH3 +temp8_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp9_input milli Celsius RO Temperature of DIMM0 on CH4 +temp9_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp10_input milli Celsius RO Temperature of DIMM0 on CH5 +temp10_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp11_input milli Celsius RO Temperature of DIMM0 on CH6 +temp11_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp12_input milli Celsius RO Temperature of DIMM0 on CH7 +temp12_crit milli Celsius RO MEM HOT Threshold for all DIMMs +temp13_input milli Celsius RO Max temperature reported among RCA VRDs +in0_input milli Volts RO Core voltage +in1_input milli Volts RO SoC voltage +in2_input milli Volts RO DIMM VRD1 voltage +in3_input milli Volts RO DIMM VRD2 voltage +in4_input milli Volts RO RCA VRD voltage +cur1_input milli Amperes RO Core VRD current +cur2_input milli Amperes RO SoC VRD current +cur3_input milli Amperes RO DIMM VRD1 current +cur4_input milli Amperes RO DIMM VRD2 current +cur5_input milli Amperes RO RCA VRD current +power1_input micro Watts RO Core VRD power +power2_input micro Watts RO SoC VRD power +power3_input micro Watts RO DIMM VRD1 power +power4_input micro Watts RO DIMM VRD2 power +power5_input micro Watts RO RCA VRD power +============ ============= ====== =============================================== + +Example:: + + # cat in0_input + 830 + # cat temp1_input + 37000 + # cat curr1_input + 9000 + # cat power5_input + 19500000 -- 2.28.0