tree 2418c0c96a461547ea65c615a777a4c18f335a54
parent 35dd840eb7bd4b4f39f485d6a13fd17bd370fc0d
author Firas Sammoura <fsammoura@google.com> 1749500291 -0700
committer Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> 1750486229 -0700

zephyr: shim: Adjust RO size for helipilot baseboard

The NPCX platform on helipilot baseboard requires a 4kB reduction in the
RO image size (`CONFIG_RO_SIZE`) compared to the Zephyr-defined
`CONFIG_CROS_EC_RO_SIZE`. This is necessary to prevent the combined
firmware image and header from exceeding the available RO flash space
(e.g., 0x20000 on helipilot).

This change ensures `CONFIG_RO_SIZE` reflects the actual available RO
size, calculated as `CONFIG_CROS_EC_RO_SIZE - 0x1000`.

BUG=b:419592396
TEST=./test/run_device_tests.py -b helipilot -f servo_micro -t
     rollback_entropy --zephyr

Change-Id: I23b13cf7fe4364027542aaff9f4bfed8b83d33b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/6631020
Reviewed-by: David Cross <davidmcross@google.com>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Reviewed-by: CH Lin (Jun) <chlin56@nuvoton.com>
Commit-Queue: Firas Sammoura <fsammoura@google.com>
Tested-by: Firas Sammoura <fsammoura@google.com>