arm64: dts: qcom: msm8994: Add support for SMD RPM

Add support for SMD RPM, including pm8994 and pmi8994
regulators.
Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Link: https://lore.kernel.org/r/20200624150107.76234-7-konradybcio@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8994.dtsi

@@ -175,9 +175,31 @@ smem_mem: smem_region@6a00000 {
 		};
 	};
 
+	smd {
+		compatible = "qcom,smd";
+		rpm {
+			interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+			qcom,ipc = <&apcs 8 0>;
+			qcom,smd-edge = <15>;
+			qcom,local-pid = <0>;
+			qcom,remote-pid = <6>;
+
+			rpm_requests: rpm-requests {
+				compatible = "qcom,rpm-msm8994";
+				qcom,smd-channels = "rpm_requests";
+
+				rpmcc: rpmcc {
+					compatible = "qcom,rpmcc-msm8994";
+					#clock-cells = <1>;
+				};
+			};
+		};
+	};
+
 	smem {
 		compatible = "qcom,smem";
 		memory-region = <&smem_mem>;
+		qcom,rpm-msg-ram = <&rpm_msg_ram>;
 		hwlocks = <&tcsr_mutex 3>;
 	};
 
@@ -196,6 +218,12 @@ intc: interrupt-controller@f9000000 {
 			      <0xf9002000 0x1000>;
 		};
 
+		apcs: mailbox@f900d000 {
+			compatible = "qcom,msm8994-apcs-kpss-global", "syscon";
+			reg = <0xf900d000 0x2000>;
+			#mbox-cells = <1>;
+		};
+
 		timer@f9020000 {
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -449,6 +477,11 @@ gcc: clock-controller@fc400000 {
 			reg = <0xfc400000 0x2000>;
 		};
 
+		rpm_msg_ram: memory@fc428000 {
+			compatible = "qcom,rpm-msg-ram";
+			reg = <0xfc428000 0x4000>;
+		};
+
 		restart@fc4ab000 {
 			compatible = "qcom,pshold";
 			reg = <0xfc4ab000 0x4>;
@@ -666,5 +699,15 @@ timer {
 			     <GIC_PPI 4 0xff08>,
 			     <GIC_PPI 1 0xff08>;
 	};
+
+	vreg_vph_pwr: vreg-vph-pwr {
+		compatible = "regulator-fixed";
+		regulator-name = "vph-pwr";
+
+		regulator-min-microvolt = <3600000>;
+		regulator-max-microvolt = <3600000>;
+
+		regulator-always-on;
+	};
 };