arm64: dts: renesas: salvator-common: Add GPIO keys support

The Salvator-X and XS boards have a 4 lines DIP switch and 3 push
buttons connected to SoC GPIOs, meant to be used as general-purpose test
keys. Add a corresponding node in DT, mapping (semi-randomly) the DIP
switch to keys 1-4 and the push buttons to keys A-C.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index 0e5a76fee5fc9c79ec5a9521df8034f01e42622d..2dba1328acfaa9dd997f57f87a28cb59b8ce9bb9 100644 (file)
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -29,6 +29,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
        aliases {
@@ -86,6 +87,63 @@ hdmi_in_con: endpoint {
                };
        };
 
+       keys {
+               compatible = "gpio-keys";
+
+               pinctrl-0 = <&keys_pins>;
+               pinctrl-names = "default";
+
+               key-1 {
+                       gpios = <&gpio5 17 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_1>;
+                       label = "SW4-1";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-2 {
+                       gpios = <&gpio5 20 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_2>;
+                       label = "SW4-2";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-3 {
+                       gpios = <&gpio5 22 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_3>;
+                       label = "SW4-3";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-4 {
+                       gpios = <&gpio5 23 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_4>;
+                       label = "SW4-4";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-a {
+                       gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_A>;
+                       label = "TSW0";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-b {
+                       gpios = <&gpio6 12 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_B>;
+                       label = "TSW1";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+               key-c {
+                       gpios = <&gpio6 13 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_C>;
+                       label = "TSW2";
+                       wakeup-source;
+                       debounce-interval = <20>;
+               };
+       };
+
        reg_1p8v: regulator0 {
                compatible = "regulator-fixed";
                regulator-name = "fixed-1.8V";
@@ -572,6 +630,11 @@ irq0_pins: irq0 {
                function = "intc_ex";
        };
 
+       keys_pins: keys {
+               pins = "GP_5_17", "GP_5_20", "GP_5_22";
+               bias-pull-up;
+       };
+
        pwm1_pins: pwm1 {
                groups = "pwm1_a";
                function = "pwm1";