From 5f3b8a89cc7c96a62b9a006cd4ef6df3758979e2 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Wed, 18 Apr 2018 08:18:33 +0000
Subject: [PATCH] define relay as leds

This allows us to take over pins right after kernel boot as opposed
to waiting for userland to start up. This configuration starts with
relays off so that brightness values in /sys/class/leds is correct
---
 device-tree/relay-leds.dts | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 device-tree/relay-leds.dts

diff --git a/device-tree/relay-leds.dts b/device-tree/relay-leds.dts
new file mode 100644
index 0000000..0136477
--- /dev/null
+++ b/device-tree/relay-leds.dts
@@ -0,0 +1,28 @@
+/dts-v1/;
+/plugin/;
+/* dtc -I dts -O dtb relay-leds.dts > /boot/overlays/relay-leds.dtbo */
+/ {
+	fragment@0 {
+		target = <&leds>;
+		__overlay__ {
+			compatible = "gpio-leds";
+			relay1: relay@1 {
+				label = "relay1";
+				gpios = <&gpio 12 1>; /* 0 = active low, 1 = active high */
+				linux,default-trigger = "none"; /* default-on */
+			};
+			relay2: relay@2 {
+				label = "relay2";
+				gpios = <&gpio 16 1>;
+			};
+			relay3: relay@3 {
+				label = "relay3";
+				gpios = <&gpio 20 1>;
+			};
+			relay4: relay@4 {
+				label = "relay4";
+				gpios = <&gpio 21 1>;
+			};
+		};
+	};
+};
-- 
2.20.1