linux-kernel - [PATCH v2 1/9] ARM: tegra: Add ACTMON support on Tegra114

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Message-ID: <20250820151323.167772-2-clamor95@gmail.com>
Date: Wed, 20 Aug 2025 18:13:15 +0300
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thierry Reding <treding@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Svyatoslav Ryhel <clamor95@...il.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Dmitry Osipenko <digetx@...il.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: [PATCH v2 1/9] ARM: tegra: Add ACTMON support on Tegra114

Add support for ACTMON on Tegra114. This is used to monitor activity from
different components. Based on the collected statistics, the rate at which
the external memory needs to be clocked can be derived.

Actmon driver has T30 and T124 compatibles, T124 fits for T114 as well.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 arch/arm/boot/dts/nvidia/tegra114.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
index d9c51e6900d8..5a6999eb4357 100644
--- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
@@ -248,6 +248,18 @@ ahb: ahb@...0c000 {
 		reg = <0x6000c000 0x150>;
 	};
 
+	actmon: actmon@...0c800 {
+		compatible = "nvidia,tegra114-actmon", "nvidia,tegra124-actmon";
+		reg = <0x6000c800 0x400>;
+		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&tegra_car TEGRA114_CLK_ACTMON>,
+			 <&tegra_car TEGRA114_CLK_EMC>;
+		clock-names = "actmon", "emc";
+		resets = <&tegra_car TEGRA114_CLK_ACTMON>;
+		reset-names = "actmon";
+		#cooling-cells = <2>;
+	};
+
 	gpio: gpio@...0d000 {
 		compatible = "nvidia,tegra114-gpio", "nvidia,tegra30-gpio";
 		reg = <0x6000d000 0x1000>;
-- 
2.48.1