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Mon, 26 Jan 2026 11:15:49 -0800 (PST) From: Svyatoslav Ryhel To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Svyatoslav Ryhel , Mikko Perttunen Cc: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 3/5] ARM: tegra: Add EMC OPP and ICC properties to Tegra114 EMC and ACTMON device-tree nodes Date: Mon, 26 Jan 2026 21:15:34 +0200 Message-ID: <20260126191536.78829-4-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260126191536.78829-1-clamor95@gmail.com> References: <20260126191536.78829-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- .../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 =3D "operating-points-v2"; + + opp-12750000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <12750000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-20400000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <20400000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-40800000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <40800000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-68000000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <68000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-102000000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <102000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-204000000-900 { + opp-microvolt =3D <900000 900000 1390000>; + opp-hz =3D /bits/ 64 <204000000>; + opp-supported-hw =3D <0x000F>; + opp-suspend; + }; + + opp-312000000-1000 { + opp-microvolt =3D <1000000 1000000 1390000>; + opp-hz =3D /bits/ 64 <312000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-408000000-1000 { + opp-microvolt =3D <1000000 1000000 1390000>; + opp-hz =3D /bits/ 64 <408000000>; + opp-supported-hw =3D <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 =3D <1100000 1100000 1390000>; + opp-hz =3D /bits/ 64 <528000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-624000000-1100 { + opp-microvolt =3D <1100000 1100000 1390000>; + opp-hz =3D /bits/ 64 <624000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-792000000-1100 { + opp-microvolt =3D <1100000 1100000 1390000>; + opp-hz =3D /bits/ 64 <792000000>; + opp-supported-hw =3D <0x000F>; + }; + + opp-900000000-1200 { + opp-microvolt =3D <1200000 1200000 1390000>; + opp-hz =3D /bits/ 64 <900000000>; + opp-supported-hw =3D <0x000E>; + }; + }; + + emc_bw_dfs_opp_table: opp-table-actmon { + compatible =3D "operating-points-v2"; + + opp-12750000 { + opp-hz =3D /bits/ 64 <12750000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <204000>; + }; + + opp-20400000 { + opp-hz =3D /bits/ 64 <20400000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <326400>; + }; + + opp-40800000 { + opp-hz =3D /bits/ 64 <40800000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <652800>; + }; + + opp-68000000 { + opp-hz =3D /bits/ 64 <68000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <1088000>; + }; + + opp-102000000 { + opp-hz =3D /bits/ 64 <102000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <1632000>; + }; + + opp-204000000 { + opp-hz =3D /bits/ 64 <204000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <3264000>; + opp-suspend; + }; + + opp-312000000 { + opp-hz =3D /bits/ 64 <312000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <4992000>; + }; + + opp-408000000 { + opp-hz =3D /bits/ 64 <408000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <6528000>; + }; + + opp-528000000 { + opp-hz =3D /bits/ 64 <528000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <8448000>; + }; + + opp-624000000 { + opp-hz =3D /bits/ 64 <624000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <9984000>; + }; + + opp-792000000 { + opp-hz =3D /bits/ 64 <792000000>; + opp-supported-hw =3D <0x000F>; + opp-peak-kBps =3D <12672000>; + }; + + opp-900000000 { + opp-hz =3D /bits/ 64 <900000000>; + opp-supported-hw =3D <0x000E>; + opp-peak-kBps =3D <14400000>; + }; + }; +}; diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvi= dia/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 #include =20 +#include "tegra114-peripherals-opp.dtsi" + / { compatible =3D "nvidia,tegra114"; interrupt-parent =3D <&lic>; @@ -323,6 +325,9 @@ actmon: actmon@6000c800 { clock-names =3D "actmon", "emc"; resets =3D <&tegra_car TEGRA114_CLK_ACTMON>; reset-names =3D "actmon"; + operating-points-v2 =3D <&emc_bw_dfs_opp_table>; + interconnects =3D <&mc TEGRA114_MC_MPCORER &emc>; + interconnect-names =3D "cpu-read"; #cooling-cells =3D <2>; }; =20 @@ -655,6 +660,7 @@ mc: memory-controller@70019000 { =20 #reset-cells =3D <1>; #iommu-cells =3D <1>; + #interconnect-cells =3D <1>; }; =20 emc: external-memory-controller@7001b000 { @@ -665,6 +671,9 @@ emc: external-memory-controller@7001b000 { clock-names =3D "emc"; =20 nvidia,memory-controller =3D <&mc>; + operating-points-v2 =3D <&emc_icc_dvfs_opp_table>; + + #interconnect-cells =3D <0>; }; =20 hda@70030000 { --=20 2.51.0