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-rw-r--r--Documentation/releases/coreboot-4.14-relnotes.md24
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/releases/coreboot-4.14-relnotes.md b/Documentation/releases/coreboot-4.14-relnotes.md
index 43a8d0dc0b..b4c94e90d1 100644
--- a/Documentation/releases/coreboot-4.14-relnotes.md
+++ b/Documentation/releases/coreboot-4.14-relnotes.md
@@ -10,6 +10,30 @@ Update this document with changes that should be in the release notes.
* The chip and board additions and removals will be updated right
before the release, so those do not need to be added.
+Deprecations
+------------
+
+### SAR support in VPD for Chrome OS
+
+SAR support in VPD has been deprecated for Chrome OS platforms for > 1
+year now. All new Chrome OS platforms have switched to using SAR
+tables from CBFS. For the next release, coreboot is updated to align
+with the Chrome OS factory changes and hence SAR support in VPD is
+deprecated in [CB:51483](https://review.coreboot.org/51483). Starting
+with this release, anyone building coreboot for an already released
+Chrome OS platform with SAR table in VPD will have to extract the
+"wifi_sar" key from VPD and add it as a file to CBFS using following
+steps:
+ * On DUT, read SAR value using `vpd -i RO_VPD -g wifi_sar`
+ * In coreboot repo, generate CBFS SAR file using:
+ `echo ${SAR_STRING} > site-local/${BOARD}-sar.hex`
+ * Add to site-local/Kconfig:
+ ```
+ config WIFI_SAR_CBFS_FILEPATH
+ string
+ default "site-local/${BOARD}-sar.hex"
+ ```
+
Significant changes
-------------------