From: Svyatoslav Ryhel <clamor95@gmail.com>
Date: Mon, 27 Apr 2026 07:03:10 +0000 (+0300)
Subject: ARM: tegra: Add EMC OPP and ICC properties to Tegra114 EMC and ACTMON device-tree... 
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bdc80b3246f18f8f9f94af78c3c9f3c22c62fad3;p=thirdparty%2Fkernel%2Flinux.git

ARM: tegra: Add EMC OPP and ICC properties to Tegra114 EMC and ACTMON device-tree nodes

Add EMC OPP tables and interconnect paths that will be used for dynamic
memory bandwidth scaling based on memory utilization statistics.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
new file mode 100644
index 0000000000000..b40a1c24abab7
--- /dev/null
+++ b/arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/ {
+	emc_icc_dvfs_opp_table: opp-table-emc {
+		compatible = "operating-points-v2";
+
+		opp-12750000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <12750000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-20400000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <20400000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-40800000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <40800000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-68000000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <68000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-102000000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <102000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-204000000-900 {
+			opp-microvolt = <900000 900000 1390000>;
+			opp-hz = /bits/ 64 <204000000>;
+			opp-supported-hw = <0x000F>;
+			opp-suspend;
+		};
+
+		opp-312000000-1000 {
+			opp-microvolt = <1000000 1000000 1390000>;
+			opp-hz = /bits/ 64 <312000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-408000000-1000 {
+			opp-microvolt = <1000000 1000000 1390000>;
+			opp-hz = /bits/ 64 <408000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		/*
+		 * T40X can work with 1050mV for 528MHz but T40T which is
+		 * in the same group as T40X requires 1100mV. If there will
+		 * be enough data that T40T can work reliably with 1050mV
+		 * for 528MHz then voltage for 528MHz opp can be lowered.
+		 * T40S should remain with 1100mV for 528MHz opp.
+		 */
+		opp-528000000-1100 {
+			opp-microvolt = <1100000 1100000 1390000>;
+			opp-hz = /bits/ 64 <528000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-624000000-1100 {
+			opp-microvolt = <1100000 1100000 1390000>;
+			opp-hz = /bits/ 64 <624000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-792000000-1100 {
+			opp-microvolt = <1100000 1100000 1390000>;
+			opp-hz = /bits/ 64 <792000000>;
+			opp-supported-hw = <0x000F>;
+		};
+
+		opp-900000000-1200 {
+			opp-microvolt = <1200000 1200000 1390000>;
+			opp-hz = /bits/ 64 <900000000>;
+			opp-supported-hw = <0x000E>;
+		};
+	};
+
+	emc_bw_dfs_opp_table: opp-table-actmon {
+		compatible = "operating-points-v2";
+
+		opp-12750000 {
+			opp-hz = /bits/ 64 <12750000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <204000>;
+		};
+
+		opp-20400000 {
+			opp-hz = /bits/ 64 <20400000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <326400>;
+		};
+
+		opp-40800000 {
+			opp-hz = /bits/ 64 <40800000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <652800>;
+		};
+
+		opp-68000000 {
+			opp-hz = /bits/ 64 <68000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <1088000>;
+		};
+
+		opp-102000000 {
+			opp-hz = /bits/ 64 <102000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <1632000>;
+		};
+
+		opp-204000000 {
+			opp-hz = /bits/ 64 <204000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <3264000>;
+			opp-suspend;
+		};
+
+		opp-312000000 {
+			opp-hz = /bits/ 64 <312000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <4992000>;
+		};
+
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <6528000>;
+		};
+
+		opp-528000000 {
+			opp-hz = /bits/ 64 <528000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <8448000>;
+		};
+
+		opp-624000000 {
+			opp-hz = /bits/ 64 <624000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <9984000>;
+		};
+
+		opp-792000000 {
+			opp-hz = /bits/ 64 <792000000>;
+			opp-supported-hw = <0x000F>;
+			opp-peak-kBps = <12672000>;
+		};
+
+		opp-900000000 {
+			opp-hz = /bits/ 64 <900000000>;
+			opp-supported-hw = <0x000E>;
+			opp-peak-kBps = <14400000>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
index 7e8f90d339359..6c2b79b359385 100644
--- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
@@ -8,6 +8,8 @@
 #include <dt-bindings/soc/tegra-pmc.h>
 #include <dt-bindings/thermal/tegra114-soctherm.h>
 
+#include "tegra114-peripherals-opp.dtsi"
+
 / {
 	compatible = "nvidia,tegra114";
 	interrupt-parent = <&lic>;
@@ -323,6 +325,9 @@
 		clock-names = "actmon", "emc";
 		resets = <&tegra_car TEGRA114_CLK_ACTMON>;
 		reset-names = "actmon";
+		operating-points-v2 = <&emc_bw_dfs_opp_table>;
+		interconnects = <&mc TEGRA114_MC_MPCORER &emc>;
+		interconnect-names = "cpu-read";
 		#cooling-cells = <2>;
 	};
 
@@ -655,6 +660,7 @@
 
 		#reset-cells = <1>;
 		#iommu-cells = <1>;
+		#interconnect-cells = <1>;
 	};
 
 	emc: external-memory-controller@7001b000 {
@@ -665,6 +671,9 @@
 		clock-names = "emc";
 
 		nvidia,memory-controller = <&mc>;
+		operating-points-v2 = <&emc_icc_dvfs_opp_table>;
+
+		#interconnect-cells = <0>;
 	};
 
 	hda@70030000 {