From nobody Sun Oct 5 10:47:12 2025 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 0F08221B918 for ; Wed, 6 Aug 2025 07:43:05 +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=1754466186; cv=none; b=hLF/JkaNDg0rFXVXja42AFJeOhfVYp17ZCI8sxl+XSqmZY6NXJ9T4gfUnvkG8FZeezX/WdKu7xcqBcFWehqorjL6z7XslIhDd3sHqRzkFQZMCTatCpYS/7W9X9W/ZFfWqmOO7oNJCD4CVmPXm2YWMd7rPvrLeH9TNrqGcGUxccM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754466186; c=relaxed/simple; bh=OWGxcklWWo0vv0ZQ8Q6Q56zQqcy4rZKZZq9hhvEnZuk=; h=From:Date:Subject:MIME-Version:Message-Id:In-Reply-To:To:Cc: Content-Type:References; b=hYhcw94ZFLkQ1o9ix/bTPmD/Mw9XDnDVSQVzmuwIQ9FGXoSpmLHTKGpHKlAGcc8usWuLHWeHaWqpb+0sc1m/RIKlAXtNfB/g1xsDMrXhrLTvqLQMIrEYn6eY8TBcmtUMrVggdC8VO+ALBT14ZR6b+BADRx+CRTJpslj55qD194I= 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=ti2N6Vr/; 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="ti2N6Vr/" Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20250806074301euoutp0148640bce479a5f8fe13dae172bf36f56~ZHbJmEBa42812928129euoutp01T for ; Wed, 6 Aug 2025 07:43:01 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20250806074301euoutp0148640bce479a5f8fe13dae172bf36f56~ZHbJmEBa42812928129euoutp01T DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1754466181; bh=nmhVn6OSCj5podj8kRrzheU5aifoU9hBWKaGqoQKYps=; h=From:Date:Subject:In-Reply-To:To:Cc:References:From; b=ti2N6Vr/WBscgtRSzCFRSaAa00kdArg/Tor/Zac71P/OC2RLqDS20l88pFlIP0URs nmtJyg/OiAvldr/JKZ3ARXnvImRzY/Ph8awxXbS8EeglCEGVg4/+EZv0jmHVvsWXT6 ifHsOxgDf80cgFjZfTLZC40QpcHI28yrtkdbTFNg= Received: from eusmtip2.samsung.com (unknown [203.254.199.222]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20250806074301eucas1p144cb9c0f93c47316cf0f85deadbcc78b~ZHbI9vBPk2593725937eucas1p11; Wed, 6 Aug 2025 07:43:01 +0000 (GMT) Received: from AMDC4942.eu.corp.samsungelectronics.net (unknown [106.210.136.40]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250806074300eusmtip2a0f8c46752374f8fce9ea659ec502046~ZHbH6Hw4F1570815708eusmtip2c; Wed, 6 Aug 2025 07:43:00 +0000 (GMT) From: Michal Wilczynski Date: Wed, 06 Aug 2025 09:42:52 +0200 Subject: [PATCH v13 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: <20250806-rust-next-pwm-working-fan-for-sending-v13-7-690b669295b6@samsung.com> In-Reply-To: <20250806-rust-next-pwm-working-fan-for-sending-v13-0-690b669295b6@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 , Guo Ren , Fu Wei , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Marek Szyprowski , Benno Lossin , Michael Turquette , Drew Fustini , Benno Lossin , Drew Fustini 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 X-Mailer: b4 0.15-dev X-CMS-MailID: 20250806074301eucas1p144cb9c0f93c47316cf0f85deadbcc78b X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20250806074301eucas1p144cb9c0f93c47316cf0f85deadbcc78b X-EPHeader: CA X-CMS-RootMailID: 20250806074301eucas1p144cb9c0f93c47316cf0f85deadbcc78b References: <20250806-rust-next-pwm-working-fan-for-sending-v13-0-690b669295b6@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. Reviewed-by: Drew Fustini Tested-by: Drew Fustini 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