[PATCH v3] arm64: dts: imx8mm: Add NOC node

* [PATCH v3] arm64: dts: imx8mm: Add NOC node
@ 2021-11-04  8:56 ` Tommaso Merciai
  0 siblings, 0 replies; 2+ messages in thread
From: Tommaso Merciai @ 2021-11-04  8:56 UTC (permalink / raw)
  Cc: tomm.merciai, Rob Herring, Shawn Guo, Sascha Hauer,
	Pengutronix Kernel Team, Fabio Estevam, NXP Linux Team,
	Lucas Stach, Joakim Zhang, Krzysztof Kozlowski, Alice Guo,
	Peng Fan, Marek Vasut, Adam Ford, Frieder Schrempf, devicetree,
	linux-arm-kernel, linux-kernel

Add support for dynamic frequency scaling of the main NOC configuration
on imx8mm.

References:
 - i.MX 8M Mini Applications Processor RM, Rev. 3, 11/2020
 - f18e6d573b80 arm64: dts: imx8mq: Add NOC node
 - 912b9dacf3f0 arm64: dts: imx8mq: increase NOC clock to 800 MHz
 - https://source.codeaurora.org/external/imx/linux-imx/tree/arch/ \
   arm64/boot/dts/freescale/imx8mm.dtsi?h=lf-5.10.y

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
---
Changes since v1:
 - Fix noc_opp_table frequencies taking NXP bsp as reference
 - Add reference link to nxp imx8mm dtsi on commit body

 Changes since v2:
 - Add missing signed-off line

 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 25 +++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index c2f3f118f82e..1bcc5e361ca3 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -719,6 +719,31 @@ pgc_mipi: power-domain@11 {
 			};
 		};
 
+		noc: interconnect@32700000 {
+			compatible = "fsl,imx8mm-noc", "fsl,imx8m-noc";
+			reg = <0x32700000 0x100000>;
+			clocks = <&clk IMX8MM_CLK_NOC>;
+			fsl,ddrc = <&ddrc>;
+			#interconnect-cells = <1>;
+			operating-points-v2 = <&noc_opp_table>;
+
+			noc_opp_table: 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>;
+				};
+			};
+		};
+
 		aips2: bus@30400000 {
 			compatible = "fsl,aips-bus", "simple-bus";
 			reg = <0x30400000 0x400000>;
-- 
2.25.1


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