[PATCH RFC v5 09/10] arm64: dts: imx8m: Add NOC nodes

[Leonard Crestez <leonard.crestez@xxxxxxx>]

Add initial support for dynamic frequency scaling of main NOC.

Make DDRC the parent of the NOC (using passive governor) so that the
main NOC is automatically scaled together with DDRC by default.

Support for proactive scaling via interconnect will come later.

Signed-off-by: Leonard Crestez <leonard.crestez@xxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 22 ++++++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mn.dtsi | 22 ++++++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 22 ++++++++++++++++++++++
 3 files changed, 66 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 5404870d80d5..dc0ab49bbbd2 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -138,10 +138,24 @@
 			clock-latency-ns = <150000>;
 			opp-suspend;
 		};
 	};
 
+	noc_opp_table: noc-opp-table {
+		compatible = "operating-points-v2";
+
+		opp-150M {
+			opp-hz = /bits/ 64 <150000000>;
+		};
+		opp-375M {
+			opp-hz = /bits/ 64 <375000000>;
+		};
+		opp-750M {
+			opp-hz = /bits/ 64 <750000000>;
+		};
+	};
+
 	memory@40000000 {
 		device_type = "memory";
 		reg = <0x0 0x40000000 0 0x80000000>;
 	};
 
@@ -772,10 +786,18 @@
 				status = "disabled";
 			};
 
 		};
 
+		noc: interconnect@32700000 {
+			compatible = "fsl,imx8mm-noc", "fsl,imx8m-noc";
+			reg = <0x32700000 0x100000>;
+			clocks = <&clk IMX8MM_CLK_NOC>;
+			devfreq = <&ddrc>;
+			operating-points-v2 = <&noc_opp_table>;
+		};
+
 		aips4: bus@32c00000 {
 			compatible = "fsl,aips-bus", "simple-bus";
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x32c00000 0x32c00000 0x400000>;
diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index 344dd777635f..6b4a9ba2a8a5 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -137,10 +137,24 @@
 			clock-latency-ns = <150000>;
 			opp-suspend;
 		};
 	};
 
+	noc_opp_table: noc-opp-table {
+		compatible = "operating-points-v2";
+
+		opp-100M {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+		opp-600M {
+			opp-hz = /bits/ 64 <600000000>;
+		};
+		opp-800M {
+			opp-hz = /bits/ 64 <800000000>;
+		};
+	};
+
 	memory@40000000 {
 		device_type = "memory";
 		reg = <0x0 0x40000000 0 0x80000000>;
 	};
 
@@ -668,10 +682,18 @@
 				status = "disabled";
 			};
 
 		};
 
+		noc: interconnect@32700000 {
+			compatible = "fsl,imx8mn-noc", "fsl,imx8m-noc";
+			reg = <0x32700000 0x100000>;
+			clocks = <&clk IMX8MN_CLK_NOC>;
+			devfreq = <&ddrc>;
+			operating-points-v2 = <&noc_opp_table>;
+		};
+
 		aips4: bus@32c00000 {
 			compatible = "fsl,aips-bus", "simple-bus";
 			reg = <0x32c00000 0x400000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index 6ef1af41ef68..c42c67eb1d50 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -183,10 +183,24 @@
 			clock-latency-ns = <150000>;
 			opp-suspend;
 		};
 	};
 
+	noc_opp_table: noc-opp-table {
+		compatible = "operating-points-v2";
+
+		opp-133M {
+			opp-hz = /bits/ 64 <133333333>;
+		};
+		opp-400M {
+			opp-hz = /bits/ 64 <400000000>;
+		};
+		opp-800M {
+			opp-hz = /bits/ 64 <800000000>;
+		};
+	};
+
 	pmu {
 		compatible = "arm,cortex-a53-pmu";
 		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-parent = <&gic>;
 		interrupt-affinity = <&A53_0>, <&A53_1>, <&A53_2>, <&A53_3>;
@@ -931,10 +945,18 @@
 				fsl,num-rx-queues = <3>;
 				status = "disabled";
 			};
 		};
 
+		noc: interconnect@32700000 {
+			compatible = "fsl,imx8mq-noc", "fsl,imx8m-noc";
+			reg = <0x32700000 0x100000>;
+			clocks = <&clk IMX8MQ_CLK_NOC>;
+			devfreq = <&ddrc>;
+			operating-points-v2 = <&noc_opp_table>;
+		};
+
 		bus@32c00000 { /* AIPS4 */
 			compatible = "fsl,imx8mq-aips-bus", "simple-bus";
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x32c00000 0x32c00000 0x400000>;
-- 
2.17.1