rules: Add automatic suspend udev rules

The ChromeOS ecosystem has a large amount of testing, both automated
and manual across devices including measurement of power regressions.

It's safe to assume that any of these devices will handle USB
auto-suspend appropriately.  Use the script from ChromeOS
https://chromium.googlesource.com/chromiumos/platform2/+/master/power_manager/udev/gen_autosuspend_rules.py
to generate udev rules at build time.

This script in systemd `tools/chromeos/gen_autosuspend_rules.py` should be kept
in sync with the ChromeOS version of the script.

Manually added autosuspend devices should be placed in the new
template `rules/61-autosuspend-manual.rules`

Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tools/make-autosuspend-rules.py b/tools/make-autosuspend-rules.py
new file mode 100755
index 0000000000..732731626d
--- /dev/null
+++ b/tools/make-autosuspend-rules.py
@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1+
+
+# Generate autosuspend rules for devices that have been whitelisted (IE tested)
+# by the ChromeOS team. Please keep this script in sync with:
+# https://chromium.googlesource.com/chromiumos/platform2/+/master/power_manager/udev/gen_autosuspend_rules.py
+
+import sys
+import chromeos.gen_autosuspend_rules
+
+if __name__ == '__main__':
+    if len(sys.argv) > 1:
+        sys.stdout = open(sys.argv[1], 'w')
+    chromeos.gen_autosuspend_rules.main()