arm64: dts: imx8mq: Add NOC node

Add initial support for dynamic frequency scaling of the main NOC on imx8mq. 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 on top. Signed-off-by: Leonard Crestez <[email protected]> Signed-off-by: Martin Kepplinger <[email protected]> Acked-by: Georgi Djakov <[email protected]> Signed-off-by: Shawn Guo <[email protected]>
mrcsosa · Jan 15, 2021 · f18e6d5 · f18e6d5
1 parent 6428560
commit f18e6d5
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -1169,6 +1169,30 @@
 			};
 		};
 
+		noc: interconnect@32700000 {
+			compatible = "fsl,imx8mq-noc", "fsl,imx8m-noc";
+			reg = <0x32700000 0x100000>;
+			clocks = <&clk IMX8MQ_CLK_NOC>;
+			fsl,ddrc = <&ddrc>;
+			operating-points-v2 = <&noc_opp_table>;
+
+			noc_opp_table: 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>;
+				};
+			};
+		};
+
 		bus@32c00000 { /* AIPS4 */
 			compatible = "fsl,aips-bus", "simple-bus";
 			reg = <0x32c00000 0x400000>;