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Sun, 09 Nov 2025 11:21:37 -0800 (PST) Received: from apple.sigmaris.info ([2a02:8010:6606:0:d132:d099:e4e7:cb00]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47763e7a6desm91150875e9.8.2025.11.09.11.21.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Nov 2025 11:21:35 -0800 (PST) From: Hugh Cole-Baker To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner Cc: Dragan Simic , Alexey Charkov , Hugh Cole-Baker , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] arm64: dts: rockchip: add pwm-fan for NanoPC-T6 Date: Sun, 9 Nov 2025 19:20:51 +0000 Message-ID: <20251109192128.72527-1-sigmaris@gmail.com> X-Mailer: git-send-email 2.50.1 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" FriendlyELEC offers an optional heatsink and fan addon for the NanoPC-T6 and T6 LTS, which plugs in to the fan connector on the board driven by pwm1. Add the fan as an active cooling device for the SoC package. Signed-off-by: Hugh Cole-Baker --- Changes from v1: https://lore.kernel.org/linux-rockchip/20251026194858.9246= 1-1-sigmaris@gmail.com/ * add the fan to the base board dtsi instead of overlay (Heiko) * just use 2 trip points for warm and hot temperatures (Dragan, Alexey) References: FriendlyELEC heatsink with fan addon: https://www.friendlyelec.com/index.php?route=3Dproduct/product&product_id= =3D305 Vendor DT with trip points and PWM duty cycle values: https://github.com/friendlyarm/kernel-rockchip/blob/4944602540b62f5aad139fe= 602a76cf7c3176128/arch/arm64/boot/dts/rockchip/rk3588-nanopi6-rev01.dts#L75= -L90 .../boot/dts/rockchip/rk3588-nanopc-t6.dtsi | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi b/arch/arm6= 4/boot/dts/rockchip/rk3588-nanopc-t6.dtsi index fafeabe9adf9e..9164a0ee6228e 100644 --- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi @@ -11,6 +11,7 @@ #include #include #include +#include #include #include "rk3588.dtsi" =20 @@ -89,6 +90,14 @@ usr_led: led-1 { }; }; =20 + fan: pwm-fan { + compatible =3D "pwm-fan"; + cooling-levels =3D <0 35 64 100 150 255>; + fan-supply =3D <&vcc5v0_sys>; + pwms =3D <&pwm1 0 50000 0>; + #cooling-cells =3D <2>; + }; + sound { compatible =3D "simple-audio-card"; pinctrl-names =3D "default"; @@ -591,6 +600,36 @@ &i2s6_8ch { status =3D "okay"; }; =20 +&package_thermal { + polling-delay =3D <1000>; + + trips { + package_warm: package-warm { + temperature =3D <50000>; + hysteresis =3D <2000>; + type =3D "active"; + }; + + package_hot: package-hot { + temperature =3D <60000>; + hysteresis =3D <2000>; + type =3D "active"; + }; + }; + + cooling-maps { + map0 { + trip =3D <&package_warm>; + cooling-device =3D <&fan THERMAL_NO_LIMIT 1>; + }; + + map1 { + trip =3D <&package_hot>; + cooling-device =3D <&fan 2 THERMAL_NO_LIMIT>; + }; + }; +}; + &pcie2x1l0 { reset-gpios =3D <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>; vpcie3v3-supply =3D <&vcc_3v3_pcie20>; --=20 2.50.1 (Apple Git-155)