screebo: Implement LED behavior

This defines the LED's behavior according to
the OEM specification. Check more detail in the bug.

BUG=b:278153037
TEST=1.ectool led battery {color} can set the right color
     2.led works as intended behavior in different states

Change-Id: I42b67170d0d07554626b2a0158cebc8406be60a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4463817
Tested-by: wen zhang <zhangwen6@huaqin.corp-partner.google.com>
Reviewed-by: caveh jalali <caveh@chromium.org>
Commit-Queue: wen zhang <zhangwen6@huaqin.corp-partner.google.com>
Reviewed-by: Mike Lee <mike5@huaqin.corp-partner.google.com>

3 files changed, 173 insertions, 0 deletions

diff --git a/zephyr/program/rex/screebo/led_pins.dtsi b/zephyr/program/rex/screebo/led_pins.dtsi
new file mode 100644
index 0000000000..a71f0562d0
--- /dev/null
+++ b/zephyr/program/rex/screebo/led_pins.dtsi
@@ -0,0 +1,31 @@
+/* Copyright 2023 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/ {
+	gpio-led-pins {
+		compatible = "cros-ec,gpio-led-pins";
+
+		combo_led: combo-led {
+			led-id = "EC_LED_ID_BATTERY_LED";
+			led-pins = <&gpio_led_1_l &gpio_led_2_l>;
+			color_off: color-off {
+				led-color = "LED_OFF";
+				led-values = <1 1>;
+			};
+
+			color_amber: color-amber {
+				led-color = "LED_AMBER";
+				br-color = "EC_LED_COLOR_AMBER";
+				led-values = <1 0>;
+			};
+
+			color_white: color-white {
+				led-color = "LED_WHITE";
+				br-color = "EC_LED_COLOR_WHITE";
+				led-values = <0 1>;
+			};
+		};
+	};
+};
diff --git a/zephyr/program/rex/screebo/led_policy.dtsi b/zephyr/program/rex/screebo/led_policy.dtsi
new file mode 100644
index 0000000000..d3e2a53351
--- /dev/null
+++ b/zephyr/program/rex/screebo/led_policy.dtsi
@@ -0,0 +1,140 @@
+#include <dt-bindings/battery.h>
+
+/ {
+	led-colors {
+		compatible = "cros-ec,led-policy";
+
+		power-state-charge-lvl-1 {
+			charge-state = "PWR_STATE_CHARGE";
+
+			/* Battery display percent range (>= Empty, <= 94%) */
+			batt-lvl = <BATTERY_LEVEL_EMPTY 94>;
+
+			color-0 {
+				led-color = <&color_amber>;
+			};
+		};
+
+		power-state-charge-lvl-2 {
+			charge-state = "PWR_STATE_CHARGE";
+
+			/* Battery display percent range (>= 95) */
+			batt-lvl = <95 100>;
+
+			color-0 {
+				led-color = <&color_white>;
+			};
+		};
+
+		power-state-near-full {
+			charge-state = "PWR_STATE_CHARGE_NEAR_FULL";
+
+			color-0 {
+				led-color = <&color_white>;
+			};
+		};
+
+		power-state-discharge-s0 {
+			charge-state = "PWR_STATE_DISCHARGE";
+			chipset-state = "POWER_S0";
+			/* Battery display percent range (>= 11%, <= 100%) */
+			batt-lvl = <(BATTERY_LEVEL_LOW + 1) BATTERY_LEVEL_FULL>;
+
+			color-0 {
+				led-color = <&color_white>;
+			};
+		};
+
+		power-state-discharge-s0-batt-low {
+			charge-state = "PWR_STATE_DISCHARGE";
+			chipset-state = "POWER_S0";
+			/* Battery display percent range (>= 0, <= 10%) */
+			batt-lvl = <BATTERY_LEVEL_EMPTY BATTERY_LEVEL_LOW>;
+
+			/* Amber 1 sec on, 3 sec off */
+			color-0 {
+				led-color = <&color_amber>;
+				period-ms = <1000>;
+			};
+			color-1 {
+				led-color = <&color_off>;
+				period-ms = <3000>;
+			};
+		};
+
+		power-state-discharge-s3 {
+			charge-state = "PWR_STATE_DISCHARGE";
+			chipset-state = "POWER_S3";
+
+			/* White 1 sec on, 3 sec off */
+			color-0 {
+				led-color = <&color_white>;
+				period-ms = <1000>;
+			};
+			color-1 {
+				led-color = <&color_off>;
+				period-ms = <3000>;
+			};
+		};
+
+		power-state-discharge-s5 {
+			charge-state = "PWR_STATE_DISCHARGE";
+			chipset-state = "POWER_S5";
+
+			color-0 {
+				led-color = <&color_off>;
+			};
+		};
+
+		power-state-error-s0 {
+			charge-state = "PWR_STATE_ERROR";
+			chipset-state = "POWER_S0";
+			/* Amber 1 sec on, 1 sec off */
+			color-0 {
+				led-color = <&color_amber>;
+				period-ms = <1000>;
+			};
+			color-1 {
+				led-color = <&color_off>;
+				period-ms = <1000>;
+			};
+		};
+
+		power-state-error-s3 {
+			charge-state = "PWR_STATE_ERROR";
+			chipset-state = "POWER_S3";
+			/* White 1 sec on, 3 sec off */
+			color-0 {
+				led-color = <&color_white>;
+				period-ms = <1000>;
+			};
+			color-1 {
+				led-color = <&color_off>;
+				period-ms = <3000>;
+			};
+		};
+
+		power-state-error-s5 {
+			charge-state = "PWR_STATE_ERROR";
+			chipset-state = "POWER_S5";
+
+			color-0 {
+				led-color = <&color_off>;
+			};
+		};
+
+		power-state-forced-idle {
+			charge-state = "PWR_STATE_FORCED_IDLE";
+
+			/* White 2 sec on, Amber 2 sec on */
+			color-0 {
+				led-color = <&color_white>;
+				period-ms = <2000>;
+			};
+			color-1 {
+				led-color = <&color_amber>;
+				period-ms = <2000>;
+			};
+		};
+	};
+};
diff --git a/zephyr/program/rex/screebo/project.overlay b/zephyr/program/rex/screebo/project.overlay
index 35156be4f4..f1f13d91cb 100644
--- a/zephyr/program/rex/screebo/project.overlay
+++ b/zephyr/program/rex/screebo/project.overlay
@@ -13,6 +13,8 @@
 #include "../usbc.dtsi"
 
 /* Screebo project DTS includes */
+#include "led_pins.dtsi"
+#include "led_policy.dtsi"
 #include "temp_sensors.dtsi"
 
 / {