arm64: dts: ipq6018: enable DVFS support

Add A53 PLL, APCS clock, RPM Glink, RPM message RAM, cpu-opp-table,
SMPA2 regulator to enable the cpu frequency on IPQ6018.
Co-developed-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
Link: https://lore.kernel.org/r/1597648720-13649-3-git-send-email-kathirav@codeaurora.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/ipq6018.dtsi

@@ -8,6 +8,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/qcom,gcc-ipq6018.h>
 #include <dt-bindings/reset/qcom,gcc-ipq6018.h>
+#include <dt-bindings/clock/qcom,apss-ipq.h>
 
 / {
 	#address-cells = <2>;
@@ -38,6 +39,10 @@ CPU0: cpu@0 {
 			reg = <0x0>;
 			enable-method = "psci";
 			next-level-cache = <&L2_0>;
+			clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&ipq6018_s2>;
 		};
 
 		CPU1: cpu@1 {
@@ -46,6 +51,10 @@ CPU1: cpu@1 {
 			enable-method = "psci";
 			reg = <0x1>;
 			next-level-cache = <&L2_0>;
+			clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&ipq6018_s2>;
 		};
 
 		CPU2: cpu@2 {
@@ -54,6 +63,10 @@ CPU2: cpu@2 {
 			enable-method = "psci";
 			reg = <0x2>;
 			next-level-cache = <&L2_0>;
+			clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&ipq6018_s2>;
 		};
 
 		CPU3: cpu@3 {
@@ -62,6 +75,10 @@ CPU3: cpu@3 {
 			enable-method = "psci";
 			reg = <0x3>;
 			next-level-cache = <&L2_0>;
+			clocks = <&apcs_glb APCS_ALIAS0_CORE_CLK>;
+			clock-names = "cpu";
+			operating-points-v2 = <&cpu_opp_table>;
+			cpu-supply = <&ipq6018_s2>;
 		};
 
 		L2_0: l2-cache {
@@ -70,6 +87,42 @@ L2_0: l2-cache {
 		};
 	};
 
+	cpu_opp_table: cpu_opp_table {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-864000000 {
+			opp-hz = /bits/ 64 <864000000>;
+			opp-microvolt = <725000>;
+			clock-latency-ns = <200000>;
+		};
+		opp-1056000000 {
+			opp-hz = /bits/ 64 <1056000000>;
+			opp-microvolt = <787500>;
+			clock-latency-ns = <200000>;
+		};
+		opp-1320000000 {
+			opp-hz = /bits/ 64 <1320000000>;
+			opp-microvolt = <862500>;
+			clock-latency-ns = <200000>;
+		};
+		opp-1440000000 {
+			opp-hz = /bits/ 64 <1440000000>;
+			opp-microvolt = <925000>;
+			clock-latency-ns = <200000>;
+		};
+		opp-1608000000 {
+			opp-hz = /bits/ 64 <1608000000>;
+			opp-microvolt = <987500>;
+			clock-latency-ns = <200000>;
+		};
+		opp-1800000000 {
+			opp-hz = /bits/ 64 <1800000000>;
+			opp-microvolt = <1062500>;
+			clock-latency-ns = <200000>;
+		};
+	};
+
 	firmware {
 		scm {
 			compatible = "qcom,scm";
@@ -98,6 +151,11 @@ reserved-memory {
 		#size-cells = <2>;
 		ranges;
 
+		rpm_msg_ram: memory@0x60000 {
+			reg = <0x0 0x60000 0x0 0x6000>;
+			no-map;
+		};
+
 		tz: tz@48500000 {
 			reg = <0x0 0x48500000 0x0 0x00200000>;
 			no-map;
@@ -294,12 +352,22 @@ watchdog@b017000 {
 		};
 
 		apcs_glb: mailbox@b111000 {
-			compatible = "qcom,ipq8074-apcs-apps-global";
-			reg = <0x0b111000 0xc>;
-
+			compatible = "qcom,ipq6018-apcs-apps-global";
+			reg = <0x0b111000 0x1000>;
+			#clock-cells = <1>;
+			clocks = <&a53pll>, <&xo>;
+			clock-names = "pll", "xo";
 			#mbox-cells = <1>;
 		};
 
+		a53pll: clock@b116000 {
+			compatible = "qcom,ipq6018-a53pll";
+			reg = <0x0b116000 0x40>;
+			#clock-cells = <0>;
+			clocks = <&xo>;
+			clock-names = "xo";
+		};
+
 		timer {
 			compatible = "arm,armv8-timer";
 			interrupts = <GIC_PPI 2 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
@@ -440,4 +508,26 @@ wcss_smp2p_in: slave-kernel {
 			#interrupt-cells = <2>;
 		};
 	};
+
+	rpm-glink {
+		compatible = "qcom,glink-rpm";
+		interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+		qcom,rpm-msg-ram = <&rpm_msg_ram>;
+		mboxes = <&apcs_glb 0>;
+
+		rpm_requests: glink-channel {
+			compatible = "qcom,rpm-ipq6018";
+			qcom,glink-channels = "rpm_requests";
+
+			regulators {
+				compatible = "qcom,rpm-mp5496-regulators";
+
+				ipq6018_s2: s2 {
+					regulator-min-microvolt = <725000>;
+					regulator-max-microvolt = <1062500>;
+					regulator-always-on;
+				};
+			};
+		};
+	};
 };