arm64: dts: qcom: Add initial PM2250 device tree

Introduce an initial device tree for the PM2250 (sometimes known as
PM4125) PMIC.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230403-topic-rb1_qcm-v2-4-dae06f8830dc@linaro.org

arch/arm64/boot/dts/qcom/pm2250.dtsi

+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (c) 2023, Linaro Ltd
+ */
+
+#include <dt-bindings/iio/qcom,spmi-vadc.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/spmi/spmi.h>
+
+&spmi_bus {
+	pmic@0 {
+		compatible = "qcom,pm2250", "qcom,spmi-pmic";
+		reg = <0x0 SPMI_USID>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		pon@800 {
+			compatible = "qcom,pm8916-pon";
+			reg = <0x800>;
+
+			pm2250_pwrkey: pwrkey {
+				compatible = "qcom,pm8941-pwrkey";
+				interrupts-extended = <&spmi_bus 0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
+				linux,code = <KEY_POWER>;
+				debounce = <15625>;
+				bias-pull-up;
+			};
+
+			pm2250_resin: resin {
+				compatible = "qcom,pm8941-resin";
+				interrupts-extended = <&spmi_bus 0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
+				debounce = <15625>;
+				bias-pull-up;
+				status = "disabled";
+			};
+		};
+
+		rtc@6000 {
+			compatible = "qcom,pm8941-rtc";
+			reg = <0x6000>, <0x6100>;
+			reg-names = "rtc", "alarm";
+			interrupts-extended = <&spmi_bus 0x0 0x61 0x1 IRQ_TYPE_EDGE_RISING>;
+		};
+
+		pm2250_gpios: gpio@c000 {
+			compatible = "qcom,pm2250-gpio", "qcom,spmi-gpio";
+			reg = <0xc000>;
+			gpio-controller;
+			gpio-ranges = <&pm2250_gpios 0 0 10>;
+			#gpio-cells = <2>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
+	pmic@1 {
+		compatible = "qcom,pm2250", "qcom,spmi-pmic";
+		reg = <0x1 SPMI_USID>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+};