From nobody Tue Feb 10 20:51:42 2026 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F1A422C178E for ; Tue, 10 Jun 2025 12:53:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.118.77.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749560027; cv=none; b=TVC7cmafdiCo8bHuJv7SO/bFwuTfg6zuDukbVHTyMybf1vC1U/KPEhcq255x9/OuM7PKYj0ethzXkVUq2w40uW5g7wk5D5Zj6scizT7y4NNG/sCQfujJiOHE/cQZWAZHBvNWJ1ySGf9J759BfxKRdJJeYcQhwuXLWFETlHyQT40= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749560027; c=relaxed/simple; bh=pQpdhYmfxqh3Yfxmei5sPv11PaCzGkgZVRufLVaDNj8=; h=From:Date:Subject:MIME-Version:Message-Id:In-Reply-To:To:Cc: Content-Type:References; b=oHK6Gc1YWiXMTOHKZn8Mf4+8FnAG/AEjmtoMxkK6iALldo3KI5iX/gPUnqf6fkalysV+eGs2f9F2A/+URCf8fcbTtHLhsSI3POaV6+3mjvUTckX8gO0w5l9vm5XdjCPWN3+FK5OpN5FIUK/S66sIc/nC+fzSzPeLf7N4cvJkNGM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=mWM8bADX; arc=none smtp.client-ip=210.118.77.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="mWM8bADX" Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20250610125340euoutp015adec7c3640f22bc118519b7ffe9cd46~Hr5HAmKIZ1190611906euoutp01h for ; Tue, 10 Jun 2025 12:53:40 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20250610125340euoutp015adec7c3640f22bc118519b7ffe9cd46~Hr5HAmKIZ1190611906euoutp01h DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1749560020; bh=Thc/4MnT4r5I8ag38cbivyQhpbuX345C1nEB0lzCSSU=; h=From:Date:Subject:In-Reply-To:To:Cc:References:From; b=mWM8bADXn63hFahBoMnLO4Nh8lbMIvj0dudd/rnnA83EXTAyJQwTChmCJyI5vWmnl z8diroM9ZP/8YQVyhGN87PKA3wuqYD+a0IlZzxe5r7pyEu4OkCY1wcQQN0oj3KsNwU 6RCT+5LlVw5bewT/ERQ5xcu4qAbWy2eqOwOmxsZk= Received: from eusmtip1.samsung.com (unknown [203.254.199.221]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20250610125340eucas1p2288ca1486b0d4a94abceafe9eaf6718d~Hr5GgtAUY2070520705eucas1p2i; Tue, 10 Jun 2025 12:53:40 +0000 (GMT) Received: from AMDC4942.eu.corp.samsungelectronics.net (unknown [106.210.136.40]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20250610125338eusmtip12ae44043145e908a3b5b8fca4249dab0~Hr5FVRFhG0074100741eusmtip1u; Tue, 10 Jun 2025 12:53:38 +0000 (GMT) From: Michal Wilczynski Date: Tue, 10 Jun 2025 14:52:55 +0200 Subject: [PATCH v2 7/7] riscv: dts: thead: Add PWM fan and thermal control 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 Message-Id: <20250610-rust-next-pwm-working-fan-for-sending-v2-7-753e2955f110@samsung.com> In-Reply-To: <20250610-rust-next-pwm-working-fan-for-sending-v2-0-753e2955f110@samsung.com> To: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Michal Wilczynski , Drew Fustini , Guo Ren , Fu Wei , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Marek Szyprowski , Benno Lossin , Michael Turquette , Stephen Boyd , Benno Lossin Cc: linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org X-Mailer: b4 0.15-dev X-CMS-MailID: 20250610125340eucas1p2288ca1486b0d4a94abceafe9eaf6718d X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20250610125340eucas1p2288ca1486b0d4a94abceafe9eaf6718d X-EPHeader: CA X-CMS-RootMailID: 20250610125340eucas1p2288ca1486b0d4a94abceafe9eaf6718d References: <20250610-rust-next-pwm-working-fan-for-sending-v2-0-753e2955f110@samsung.com> Add Device Tree nodes to enable a PWM controlled fan and it's associated thermal management for the Lichee Pi 4A board. This enables temperature-controlled active cooling for the Lichee Pi 4A board based on SoC temperature. Signed-off-by: Michal Wilczynski --- arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts | 67 +++++++++++++++++++= ++++ 1 file changed, 67 insertions(+) diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv= /boot/dts/thead/th1520-lichee-pi-4a.dts index 4020c727f09e8e2286fdc7fecd79dbd8eba69556..c58c2085ca92a3234f1350500ce= dae4157f0c35f 100644 --- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts +++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts @@ -28,9 +28,76 @@ aliases { chosen { stdout-path =3D "serial0:115200n8"; }; + + thermal-zones { + cpu-thermal { + polling-delay =3D <1000>; + polling-delay-passive =3D <1000>; + thermal-sensors =3D <&pvt 0>; + + trips { + fan_config0: fan-trip0 { + temperature =3D <39000>; + hysteresis =3D <5000>; + type =3D "active"; + }; + + fan_config1: fan-trip1 { + temperature =3D <50000>; + hysteresis =3D <5000>; + type =3D "active"; + }; + + fan_config2: fan-trip2 { + temperature =3D <60000>; + hysteresis =3D <5000>; + type =3D "active"; + }; + }; + + cooling-maps { + map-active-0 { + cooling-device =3D <&fan 1 1>; + trip =3D <&fan_config0>; + }; + + map-active-1 { + cooling-device =3D <&fan 2 2>; + trip =3D <&fan_config1>; + }; + + map-active-2 { + cooling-device =3D <&fan 3 3>; + trip =3D <&fan_config2>; + }; + }; + }; + }; + + fan: pwm-fan { + pinctrl-names =3D "default"; + pinctrl-0 =3D <&fan_pins>; + compatible =3D "pwm-fan"; + #cooling-cells =3D <2>; + pwms =3D <&pwm 1 10000000 0>; + cooling-levels =3D <0 66 196 255>; + }; + }; =20 &padctrl0_apsys { + fan_pins: fan-0 { + pwm1-pins { + pins =3D "GPIO3_3"; /* PWM1 */ + function =3D "pwm"; + bias-disable; + drive-strength =3D <25>; + input-disable; + input-schmitt-disable; + slew-rate =3D <0>; + }; + }; + uart0_pins: uart0-0 { tx-pins { pins =3D "UART0_TXD"; --=20 2.34.1