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Message-ID: <20260126191536.78829-4-clamor95@gmail.com>
Date: Mon, 26 Jan 2026 21:15:34 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Svyatoslav Ryhel <clamor95@...il.com>,
Mikko Perttunen <mperttunen@...dia.com>
Cc: devicetree@...r.kernel.org,
linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/5] 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@...il.com>
---
.../dts/nvidia/tegra114-peripherals-opp.dtsi | 164 ++++++++++++++++++
arch/arm/boot/dts/nvidia/tegra114.dtsi | 9 +
2 files changed, 173 insertions(+)
create mode 100644 arch/arm/boot/dts/nvidia/tegra114-peripherals-opp.dtsi
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 000000000000..b40a1c24abab
--- /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 77ab17f397f6..9acba15fba25 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 @@ actmon: actmon@...0c800 {
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 @@ mc: memory-controller@...19000 {
#reset-cells = <1>;
#iommu-cells = <1>;
+ #interconnect-cells = <1>;
};
emc: external-memory-controller@...1b000 {
@@ -665,6 +671,9 @@ emc: external-memory-controller@...1b000 {
clock-names = "emc";
nvidia,memory-controller = <&mc>;
+ operating-points-v2 = <&emc_icc_dvfs_opp_table>;
+
+ #interconnect-cells = <0>;
};
hda@...30000 {
--
2.51.0
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