ARM: dts: stm32: add joystick support on stm32mp157c-ev1

The joystick (B1) on stm32mp157c-ev1 uses gpios on STMFX gpio expander.
These gpios need a pin configuration (push-pull and bias-pull-down),
described under stmfx_pinctrl node.

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts
index 36af18b..01438ac 100644 (file)
--- a/arch/arm/boot/dts/stm32mp157c-ev1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts
@@ -7,6 +7,7 @@
 
 #include "stm32mp157c-ed1.dts"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
        model = "STMicroelectronics STM32MP157C eval daughter on eval mother";
@@ -21,6 +22,43 @@
                ethernet0 = &ethernet0;
        };
 
+       joystick {
+               compatible = "gpio-keys";
+               #size-cells = <0>;
+               pinctrl-0 = <&joystick_pins>;
+               pinctrl-names = "default";
+               button-0 {
+                       label = "JoySel";
+                       linux,code = <KEY_ENTER>;
+                       interrupt-parent = <&stmfx_pinctrl>;
+                       interrupts = <0 IRQ_TYPE_EDGE_RISING>;
+               };
+               button-1 {
+                       label = "JoyDown";
+                       linux,code = <KEY_DOWN>;
+                       interrupt-parent = <&stmfx_pinctrl>;
+                       interrupts = <1 IRQ_TYPE_EDGE_RISING>;
+               };
+               button-2 {
+                       label = "JoyLeft";
+                       linux,code = <KEY_LEFT>;
+                       interrupt-parent = <&stmfx_pinctrl>;
+                       interrupts = <2 IRQ_TYPE_EDGE_RISING>;
+               };
+               button-3 {
+                       label = "JoyRight";
+                       linux,code = <KEY_RIGHT>;
+                       interrupt-parent = <&stmfx_pinctrl>;
+                       interrupts = <3 IRQ_TYPE_EDGE_RISING>;
+               };
+               button-4 {
+                       label = "JoyUp";
+                       linux,code = <KEY_UP>;
+                       interrupt-parent = <&stmfx_pinctrl>;
+                       interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+               };
+       };
+
        panel_backlight: panel-backlight {
                compatible = "gpio-backlight";
                gpios = <&gpiod 13 GPIO_ACTIVE_LOW>;
@@ -114,6 +152,12 @@
                        interrupt-controller;
                        #interrupt-cells = <2>;
                        gpio-ranges = <&stmfx_pinctrl 0 0 24>;
+
+                       joystick_pins: joystick {
+                               pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4";
+                               drive-push-pull;
+                               bias-pull-down;
+                       };
                };
        };
 };