From 18cc8d520c1807c545e8696dea15ffc66a56cdd1 Mon Sep 17 00:00:00 2001
From: INAGAKI Hiroshi <musashino.open@gmail.com>
Date: Sun, 26 Nov 2017 01:42:50 +0900
Subject: [PATCH] ramips: add missing reset button for Nexx WT1520

This commit adds missing the GPIO key used as reset button.
Nexx WT1520 has a GPIO key for factory reset, but it's not defined in
WT1520.dtsi and cannot use it.

Drop the UART (full) from the device tree source file, it was never
used for this board. Adjust the kernel bootargs accordingly.

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
[add note about dropped UART (full) to the commit message]
Signed-off-by: Mathias Kresin <dev@kresin.me>
---
 target/linux/ramips/dts/WT1520.dtsi | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/target/linux/ramips/dts/WT1520.dtsi b/target/linux/ramips/dts/WT1520.dtsi
index 1031e22749..95886d7e29 100644
--- a/target/linux/ramips/dts/WT1520.dtsi
+++ b/target/linux/ramips/dts/WT1520.dtsi
@@ -1,5 +1,8 @@
 #include "rt5350.dtsi"
 
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
 / {
 	compatible = "nexx,wt1520", "ralink,rt5350-soc";
 
@@ -8,21 +11,24 @@
 		reg = <0x0 0x2000000>;
 	};
 
-	chosen {
-		bootargs = "console=ttyS1,57600";
-	};
-};
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
 
-&uart {
-	pinctrl-names = "default";
-	pinctrl-0 = <&uartf_pins>;
-	status = "okay";
+		reset {
+			label = "reset";
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
 };
 
 &pinctrl {
 	state_default: pinctrl0 {
 		gpio {
-			ralink,group = "jtag";
+			ralink,group = "jtag", "uartf";
 			ralink,function = "gpio";
 		};
 	};