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>

diff --git a/target/linux/ramips/dts/WT1520.dtsi b/target/linux/ramips/dts/WT1520.dtsi
index 1031e22749190a6a34fec0e6441fccb030fccd48..95886d7e2907dec6ff9db7f7d892f92ed7866b51 100644 (file)
--- 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";
                };
        };