tree a167463a7fd90fc9880bee13d601cfe5c1834ea4
parent c839cb688a23dafce7dd8446423fa758bca90ace
author Ted Pudlik <tpudlik@google.com> 1689288781 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1689288781 +0000

pw_sys_io: Add facade constraint_setting, docs

Adds a constraint_setting associated with the pw_sys_io facade, and
constraint_values for the backends for this facade provided by Pigweed.
Also documents how this mechanism should be used.

pw_sys_io is just the first facade to receive this treatment: the rest
will be handled in followup CLs.

Bug: b/272090220
Change-Id: Id1f670ce194757f4ccfe489e0f29ac936f36a1ab
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/133290
Reviewed-by: Erik Gilling <konkers@google.com>
Commit-Queue: Ted Pudlik <tpudlik@google.com>
Reviewed-by: Kayce Basques <kayce@google.com>