commit 1507b1d8fb0401e14e9e654768691ba28e4f5536
author Aditya Kurdunkar <akurdunkar@nvidia.com> Thu Aug 21 13:26:13 2025 +0530
committer Aditya Kurdunkar <akurdunkar@nvidia.com> Wed Sep 03 08:08:52 2025 +0530
tree 5ebbeccc494175b97e03f91514ae608fcf331fc7
parent c00d5bf65f7ca3df557be8e2f704e5a0ef62321f

platform-mc: Add support for sensor unit 'Hertz'

Patch [1] adds the frequency sensor namespace.

This patch makes sure that a numeric sensor is added to frequency
namespace when the PLDM sensor unit is 'Hertz' (from DSP0248).

This patch has been tested for Nvidia Grace CPU, which exposes it's
operating clock frequency as a sensor

'''
% busctl tree xyz.openbmc_project.PLDM
.....
    | |- /xyz/openbmc_project/sensors/frequency
    | | |- /xyz/openbmc_project/sensors/frequency/ProcessorModule_0_CPU_0_CpuFreq_0
.....
'''

[1]: https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/83009

Change-Id: I47a3649fd9c46b19c56d06751b4786873cca71c4
Signed-off-by: Aditya Kurdunkar <akurdunkar@nvidia.com>

platform-mc/numeric_sensor.cpp

diff --git a/platform-mc/numeric_sensor.cpp b/platform-mc/numeric_sensor.cpp
index 5bf64a3..b5b5b59 100644
--- a/platform-mc/numeric_sensor.cpp
+++ b/platform-mc/numeric_sensor.cpp
@@ -146,6 +146,10 @@
             sensorNameSpace = "/xyz/openbmc_project/sensors/utilization/";
             sensorUnit = SensorUnit::Percent;
             break;
+        case PLDM_SENSOR_UNIT_HERTZ:
+            sensorNameSpace = "/xyz/openbmc_project/sensors/frequency/";
+            sensorUnit = SensorUnit::Hertz;
+            break;
         case PLDM_SENSOR_UNIT_COUNTS:
         case PLDM_SENSOR_UNIT_CORRECTED_ERRORS:
         case PLDM_SENSOR_UNIT_UNCORRECTABLE_ERRORS: