[openwrt/openwrt] mvebu: puzzle-m902: add GPIO reset button

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/280bb7c10c37027491879be7da6f1c43d0976f1a

commit 280bb7c10c37027491879be7da6f1c43d0976f1a
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Tue Dec 21 21:49:25 2021 +0000

    mvebu: puzzle-m902: add GPIO reset button
    
    Add reset button to device tree so it has the function expected from
    usual OpenWrt devices.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
    (cherry picked from commit ddad936fc60ced1783232af3eddee75347f0d08f)
---
 .../files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts b/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
index 8d2d53d03c..bfa7874a67 100644
--- a/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
+++ b/target/linux/mvebu/files/arch/arm64/boot/dts/marvell/cn9132-puzzle-m902.dts
@@ -8,6 +8,7 @@
 #include "cn9130.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
 	model = "iEi Puzzle-M902";
@@ -49,6 +50,16 @@
 		reg = <0x0 0x0 0x0 0x80000000>;
 	};
 
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "Reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&cp0_gpio2 4 GPIO_ACTIVE_LOW>;
+		};
+	};
+
 	cp2_reg_usb3_vbus0: cp2_usb3_vbus at 0 {
 		compatible = "regulator-fixed";
 		regulator-name = "cp2-xhci0-vbus";