Update to ChibiOS 20.3.4, support builds against trunk (#14208)

* Add support for building against ChibiOS svn/trunk.

* Swap to 21.6.x

* Update to latest branch revision as released version is broken.

* Updated configs.

* Conf updates.

* Updated ChibiOS

* Convert STM32L422 to actual L422 ChibiOS platform.

* Downgrade to 20.3.4 as ChibiOS 21.6.x is being aborted.

* Rollback L422-based boards.

1 files changed, 13 insertions, 10 deletions

diff --git a/docs/chibios_upgrade_instructions.md b/docs/chibios_upgrade_instructions.md
index 40c2faafc..b0a71142a 100644
--- a/docs/chibios_upgrade_instructions.md
+++ b/docs/chibios_upgrade_instructions.md
@@ -14,10 +14,10 @@ ChibiOS and ChibiOS-Contrib need to be updated in tandem -- the latter has a bra
     * First time around this will take several hours
     * Subsequent updates will be incremental only
 * Tagging example (work out which version first!):
-    * `git tag -a ver20.3.3 -m ver20.3.3 svn/tags/ver20.3.3`
-    * `git push qmk ver20.3.3`
-    * `git tag -a breaking_YYYY_qN -m breaking_YYYY_qN svn/tags/ver20.3.3`
-    * `git push qmk breaking_YYYY_qN`
+    * `git tag -a ver20.3.4 -m ver20.3.4 svn/tags/ver20.3.4`
+    * `git push qmk ver20.3.4`
+    * `git tag -a develop_YYYY_qN -m develop_YYYY_qN svn/tags/ver20.3.4`
+    * `git push qmk develop_YYYY_qN`
 
 ## Getting ChibiOS-Contrib
 
@@ -30,8 +30,8 @@ ChibiOS and ChibiOS-Contrib need to be updated in tandem -- the latter has a bra
     * `git checkout chibios-20.3.x`
     * `git pull --ff-only`
     * `git push origin chibios-20.3.x`
-    * `git tag -a breaking_YYYY_qN -m breaking_YYYY_qN chibios-20.3.x`
-    * `git push origin breaking_YYYY_qN`
+    * `git tag -a develop_YYYY_qN -m develop_YYYY_qN chibios-20.3.x`
+    * `git push origin develop_YYYY_qN`
 
 ## Updating submodules
 
@@ -42,15 +42,18 @@ ChibiOS and ChibiOS-Contrib need to be updated in tandem -- the latter has a bra
     * `git checkout -b chibios-version-bump`
     * `cd lib/chibios`
     * `git fetch --all --tags --prune`
-    * `git checkout breaking_YYYY_qN`
+    * `git checkout develop_YYYY_qN`
     * `cd ../chibios-contrib`
     * `git fetch --all --tags --prune`
-    * `git checkout breaking_YYYY_qN`
+    * `git checkout develop_YYYY_qN`
+* Update ChibiOS configs within QMK
+    * `cd $QMK_FIRMWARE`
+    * `./util/chibios_conf_updater.sh`
 * Build everything
     * `cd $QMK_FIRMWARE`
     * `qmk multibuild -j4`
     * Make sure there are no errors
 * Push to the repo
-    * `git commit -am 'Update ChibiOS to XXXXXXXXX'`
+    * `git commit -am 'Update ChibiOS to 99.9.9'`
     * `git push --set-upstream origin chibios-version-bump`
-* Make a PR to qmk_firmware with the new branch
\ No newline at end of file
+* Make a PR to qmk_firmware with the new branch