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-rw-r--r--xyz/openbmc_project/Sensor/Value.interface.yaml3
1 files changed, 2 insertions, 1 deletions
diff --git a/xyz/openbmc_project/Sensor/Value.interface.yaml b/xyz/openbmc_project/Sensor/Value.interface.yaml
index 2a060e8..daa7f24 100644
--- a/xyz/openbmc_project/Sensor/Value.interface.yaml
+++ b/xyz/openbmc_project/Sensor/Value.interface.yaml
@@ -24,7 +24,7 @@ properties:
- name: Unit
type: enum[self.Unit]
description: >
- The unit of the reading.
+ The unit of the reading. Immutable once set for a sensor.
For objects in the temperature namespace, Unit must be "DegreesC".
For objects in the fan_tach namespace, Unit must be "RPMS".
For objects in the voltage namespace, Unit must be "Volts".
@@ -36,6 +36,7 @@ properties:
type: int64
description: >
The reading scaling factor N, where the actual reading is Value * 10^N.
+ This is immutable once set for a sensor.
enumerations:
- name: Unit
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