meta-facebook: yosemite4: Add DC power check in rescan-cxl-eid

Task Description:
Enhance the rescan-cxl-eid script by adding a check for
host DC power status before performing CXL EID rescanning.
This ensures rescanning only happens when the host DC power is on.

Motivation:
Previously, the script would proceed even if the host DC power was
not on. This could cause the host-poweron service to remain in the
activating state and block execution of DC on. With this fix,
rescanning will only happen when host DC power is on, improving
service state transitions and system stability.

Design:
- Added the check_host_status() function to check DC power via GPIO
  before rescanning.
- The main loop now calls check_host_status before EID checks.

Tested:
- Check power state after power control - pass
- When DC power is off, the script logs the message, outputs CXL　
　EID　status, and exits as expected.
- When DC power is on, the EID rescan proceeds normally.

Change-Id: Ib18b2f3d40fed4058cf07155198d54c5030e386b
Signed-off-by: Liora Guo <liora.guo.wiwynn@gmail.com>

0 files changed, 0 insertions, 0 deletions