arm64: dts: qcom: pm8916: Add PON node

Add PON and pwrkey as child nodes for PON device. Also
add additional properties for pwrkey i.e., linux,code
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/pm8916.dtsi

 // SPDX-License-Identifier: GPL-2.0
 #include <dt-bindings/iio/qcom,spmi-vadc.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/spmi/spmi.h>
 
 &spmi_bus {
@@ -18,12 +19,19 @@ rtc@6000 {
 			interrupts = <0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
 		};
 
-		pwrkey@800 {
-			compatible = "qcom,pm8941-pwrkey";
+		pon@800 {
+			compatible = "qcom,pm8916-pon";
 			reg = <0x800>;
-			interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
-			debounce = <15625>;
-			bias-pull-up;
+			mode-bootloader = <0x2>;
+			mode-recovery = <0x1>;
+
+			pwrkey {
+				compatible = "qcom,pm8941-pwrkey";
+				interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
+				debounce = <15625>;
+				bias-pull-up;
+				linux,code = <KEY_POWER>;
+			};
 		};
 
 		pm8916_gpios: gpios@c000 {