python: disallow setting auto-lock without PIN

python/CHANGELOG.md

@@ -9,6 +9,11 @@ _At the moment, the project does **not** adhere to [Semantic Versioning](https:/
 ## [0.12.1] - unreleased
 [0.12.1]: https://github.com/trezor/trezor-firmware/compare/python/v0.12.0...master
 
+
+### Changed
+
+- do not allow setting auto-lock delay unless PIN is configured
+
 ### Fixed
 
 - correctly calculate hashes for very small firmwares [f#1082]

python/src/trezorlib/cli/settings.py

@@ -75,6 +75,10 @@ def display_rotation(client, rotation):
 @with_client
 def auto_lock_delay(client, delay):
     """Set auto-lock delay (in seconds)."""
+
+    if not client.features.pin_protection:
+        raise click.ClickException("Set up a PIN first")
+
     value, unit = delay[:-1], delay[-1:]
     units = {"s": 1, "m": 60, "h": 3600}
     if unit in units: