linux-kernel - [PATCH v3] arm64: dts: imx8mm: Add NOC node

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Message-Id: <20211104085620.6048-1-tomm.merciai@gmail.com>
Date:   Thu,  4 Nov 2021 09:56:17 +0100
From:   Tommaso Merciai <tomm.merciai@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     tomm.merciai@...il.com, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Joakim Zhang <qiangqing.zhang@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Alice Guo <alice.guo@....com>, Peng Fan <peng.fan@....com>,
        Marek Vasut <marex@...x.de>, Adam Ford <aford173@...il.com>,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3] arm64: dts: imx8mm: Add NOC node

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@...il.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@...00000 {
+			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@...00000 {
 			compatible = "fsl,aips-bus", "simple-bus";
 			reg = <0x30400000 0x400000>;
-- 
2.25.1