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[Accton][minipack3n] Update SMB VRM voltage sensor thresholds - #1538

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brandonchuang:mp3n_smb_threshold
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[Accton][minipack3n] Update SMB VRM voltage sensor thresholds#1538
brandonchuang wants to merge 1 commit into
facebook:mainfrom
brandonchuang:mp3n_smb_threshold

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Pre-submission checklist

  • I've ran the linters locally and fixed lint errors related to the files I modified in this PR. You can install the linters by running pip install -r requirements-dev.txt && pre-commit install
  • pre-commit run
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Summary

Update SMB VRM output voltage sensor thresholds for Minipack3n platform to widen the acceptable operating range based on latest hardware characterization data.

Changes

  1. Threshold adjustments for SMB VRM voltage outputs (VRM1, VRM3, VRM8~VRM11):
    • Raised upperCriticalVal slightly (e.g. 0.9935 → 1.01725, 0.88875 → 0.905375)
    • Lowered minAlarmVal (e.g. 0.722 → 0.6745, 0.64125 → 0.608)
    • Lowered lowerCriticalVal (e.g. 0.6315 → 0.56025, 0.55875 → 0.508875)
  2. Sensor rename:
    • SMB_VDD_T2_3_VRM_VOUTSMB_VDD_T2_VRM_VOUT (corrected naming on SMB_VRM5)

Test Plan

Ran the following commands on DUT and verified sensor readings are within updated thresholds:

Summary
Update SMB VRM output voltage sensor thresholds for Minipack3n platform to widen
the acceptable operating range based on latest hardware characterization data.

Changes
1. **Threshold adjustments for SMB VRM voltage outputs (VRM1, VRM3, VRM8~VRM11):**
   - Raised `upperCriticalVal` slightly (e.g. 0.9935 → 1.01725, 0.88875 → 0.905375)
   - Lowered `minAlarmVal` (e.g. 0.722 → 0.6745, 0.64125 → 0.608)
   - Lowered `lowerCriticalVal` (e.g. 0.6315 → 0.56025, 0.55875 → 0.508875)
2. **Sensor rename:**
   - `SMB_VDD_T2_3_VRM_VOUT` → `SMB_VDD_T2_VRM_VOUT` (corrected naming on SMB_VRM5)

Test Plan
Ran the following commands on DUT and verified sensor readings are within updated thresholds:
- `Sensor_service`
- `Sensor_service_hw_test`
- `sensor_service_client`
@brandonchuang
brandonchuang requested a review from a team as a code owner August 20, 2026 07:44
@meta-cla meta-cla Bot added the CLA Signed label Aug 20, 2026
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