From 615467f56356a2054d3a86854d391b7a2e0d5811 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <wahrenst@gmx.net>
Date: Mon, 29 Apr 2019 19:35:33 +0200
Subject: [PATCH] overlays: Add PiGlow overlay

The PiGlow is a small add-on board for the Raspberry Pi that provides
18 individually controllable LEDs (SN3218) and uses the following pins:

P1 & P17 (3V3)
P2 (5V)
P3 (SDA)
P5 (SCL)
P14 (GND)

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
 arch/arm/boot/dts/overlays/Makefile           |  1 +
 arch/arm/boot/dts/overlays/README             |  6 ++
 arch/arm/boot/dts/overlays/piglow-overlay.dts | 97 +++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 arch/arm/boot/dts/overlays/piglow-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -97,6 +97,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	pi3-disable-wifi.dtbo \
 	pi3-miniuart-bt.dtbo \
 	pibell.dtbo \
+	piglow.dtbo \
 	piscreen.dtbo \
 	piscreen2r.dtbo \
 	pisound.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1532,6 +1532,12 @@ Params: alsaname                Set the
                                 "PiBell")
 
 
+Name:   piglow
+Info:   Configures the PiGlow by pimoroni.com
+Load:   dtoverlay=piglow
+Params: <None>
+
+
 Name:   piscreen
 Info:   PiScreen display by OzzMaker.com
 Load:   dtoverlay=piscreen,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/piglow-overlay.dts
@@ -0,0 +1,97 @@
+// Definitions for SN3218 LED driver from Si-En Technology on PiGlow
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&i2c_arm>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			sn3218@54 {
+				compatible = "si-en,sn3218";
+				reg = <0x54>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				status = "okay";
+
+				led@1 {
+					reg = <1>;
+					label = "piglow:red:led1";
+				};
+				led@2 {
+					reg = <2>;
+					label = "piglow:orange:led2";
+				};
+				led@3 {
+					reg = <3>;
+					label = "piglow:yellow:led3";
+				};
+				led@4 {
+					reg = <4>;
+					label = "piglow:green:led4";
+				};
+				led@5 {
+					reg = <5>;
+					label = "piglow:blue:led5";
+				};
+				led@6 {
+					reg = <6>;
+					label = "piglow:green:led6";
+				};
+				led@7 {
+					reg = <7>;
+					label = "piglow:red:led7";
+				};
+				led@8 {
+					reg = <8>;
+					label = "piglow:orange:led8";
+				};
+				led@9 {
+					reg = <9>;
+					label = "piglow:yellow:led9";
+				};
+				led@10 {
+					reg = <10>;
+					label = "piglow:white:led10";
+				};
+				led@11 {
+					reg = <11>;
+					label = "piglow:white:led11";
+				};
+				led@12 {
+					reg = <12>;
+					label = "piglow:blue:led12";
+				};
+				led@13 {
+					reg = <13>;
+					label = "piglow:white:led13";
+				};
+				led@14 {
+					reg = <14>;
+					label = "piglow:green:led14";
+				};
+				led@15 {
+					reg = <15>;
+					label = "piglow:blue:led15";
+				};
+				led@16 {
+					reg = <16>;
+					label = "piglow:yellow:led16";
+				};
+				led@17 {
+					reg = <17>;
+					label = "piglow:orange:led17";
+				};
+				led@18 {
+					reg = <18>;
+					label = "piglow:red:led18";
+				};
+			};
+		};
+	};
+};