Import of the watch repository from Pebble

src/fw/drivers/led_controller.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+//! FIXME: These colors are not gamma-corrected, so will not match normal
+//! RGB color values, 100 is max brightness
+#define LED_BLACK       0x00000000
+#define LED_RED         0x00640000
+#define LED_GREEN       0x00006400
+#define LED_BLUE        0x00000064
+#define LED_ORANGE      0x00285F00
+
+#define LED_DIM_GREEN   0x00003C00  // Low power version for charging indicator
+#define LED_DIM_ORANGE  0x000F2300  // Low power version for charging indicator
+
+void led_controller_init(void);
+
+// Not sure these are the correct functions to define atm, but it is fine as a first pass
+void led_controller_backlight_set_brightness(uint8_t brightness);
+
+void led_controller_rgb_set_color(uint32_t rgb_color);
+
+uint32_t led_controller_rgb_get_color(void);
+