upower: Add a couple properties, and KbdBacklight bindings

upower/src/kbdbacklight.rs

@@ -0,0 +1,28 @@
+// Copyright 2021 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use zbus::proxy;
+
+#[proxy(
+	default_service = "org.freedesktop.UPower",
+	interface = "org.freedesktop.UPower.KbdBacklight",
+	default_path = "/org/freedesktop/UPower/KbdBacklight"
+)]
+trait KbdBacklight {
+	/// GetBrightness method
+	fn get_brightness(&self) -> zbus::Result<i32>;
+
+	/// GetMaxBrightness method
+	fn get_max_brightness(&self) -> zbus::Result<i32>;
+
+	/// SetBrightness method
+	fn set_brightness(&self, value: i32) -> zbus::Result<()>;
+
+	/// BrightnessChanged signal
+	#[zbus(signal)]
+	fn brightness_changed(&self, value: i32) -> zbus::Result<()>;
+
+	/// BrightnessChangedWithSource signal
+	#[zbus(signal)]
+	fn brightness_changed_with_source(&self, value: i32, source: &str) -> zbus::Result<()>;
+}