arm64: dts: r8a7795: salvator-x: Add GPIO keys support
The Salvator-X board as 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>
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index 90d1942..1ab46e1 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -34,6 +34,7 @@
/dts-v1/;
#include "r8a7795.dtsi"
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
/ {
model = "Renesas Salvator-X board based on r8a7795";
@@ -56,6 +57,63 @@
reg = <0x0 0x48000000 0x0 0x38000000>;
};
+ 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>;
+ };
+ };
+
x12_clk: x12_clk {
compatible = "fixed-clock";
#clock-cells = <0>;
@@ -345,6 +403,11 @@
function = "du";
};
+ keys_pins: keys {
+ pins = "GP_5_17", "GP_5_20", "GP_5_22";
+ bias-pull-up;
+ };
+
sdhi0_pins: sd0 {
groups = "sdhi0_data4", "sdhi0_ctrl";
function = "sdhi0";
