[PATCH v3 14/16] arm64: dts: freescale: sl28: map GPIOs to input events

[Michael Walle <michael-QKn5cuLxLXY@public.gmane.org>]

Now that we have support for GPIO lines of the SMARC connector, map the
sleep, power and lid switch signals to the corresponding keys using the
gpio-keys and gpio-keys-polled drivers. The power and sleep signals have
dedicated interrupts, thus we use these ones. The lid switch is just
mapped to a GPIO input and needs polling.

Signed-off-by: Michael Walle <michael-QKn5cuLxLXY@public.gmane.org>
---
 .../freescale/fsl-ls1028a-kontron-sl28.dts    | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
index b73794d57db4..263ce50b0b79 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts
@@ -9,6 +9,8 @@
 /dts-v1/;
 #include "fsl-ls1028a.dtsi"
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 
 / {
 	model = "Kontron SMARC-sAL28";
@@ -23,6 +25,36 @@
 		spi1 = &dspi2;
 	};
 
+	buttons0 {
+		compatible = "gpio-keys";
+
+		power-button {
+			interrupts-extended = <&sl28cpld
+					       4 IRQ_TYPE_EDGE_BOTH>;
+			linux,code = <KEY_POWER>;
+			label = "Power";
+		};
+
+		sleep-button {
+			interrupts-extended = <&sl28cpld
+					       5 IRQ_TYPE_EDGE_BOTH>;
+			linux,code = <KEY_SLEEP>;
+			label = "Sleep";
+		};
+	};
+
+	buttons1 {
+		compatible = "gpio-keys-polled";
+		poll-interval = <200>;
+
+		lid-switch {
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_LID>;
+			gpios = <&sl28cpld_gpio3 4 GPIO_ACTIVE_LOW>;
+			label = "Lid";
+		};
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
-- 
2.20.1