From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (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 21480219E0; Thu, 14 Aug 2025 23:35:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755214558; cv=none; b=ASrqxgxgwXLp3WHvG8bCbp+P1N1rDF3CzdFeY/o9CQd8ZwAC3xHcavBNTg+ieAJiu9dlwN4W+rNMOjdbrc+1hZn2hK1WI9xHU9+xNokbQF61iYc8kWrT+7Oicsy+vISZ9BZZgrGK5+B1WrSjdvDE0dKskDQVJ+nbvMazfEIOJDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755214558; c=relaxed/simple; bh=T5VAbGZ92MHd0uN3cV3PuUPUxL/Zo9VMeK/ZdLkvha4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=UoEwYWaGDCNGw0JL1zROlR6Ch3Zo3Hq7KJRdqSnJny1U1VFLyz5WGmn/l1aHXRbaS5+Vtl0dfHoY9AE4IBOya+6zUA3CuFg7K53efhAnhqazRKsf0Hr2jrlMUWygXePmUmP4efJt9mvvdOGf/3GMgV3A3Y7UNYkSIyfFr9a1vbY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=vFQVFUNQ; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=tWV0c81n; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="vFQVFUNQ"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="tWV0c81n" Received: from smtp102.mailbox.org (smtp102.mailbox.org [10.196.197.102]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4c31nw06QYz9tBF; Fri, 15 Aug 2025 01:35:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1755214548; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wbvZ1ekGJuwOIl7G04NQ4rzv98Rcb4Y1ERxLhOMI7n0=; b=vFQVFUNQIg+ezhmhzXAKC2bRenWQ6bVdP4x+8IpqQsQYCH9l41Vek1gL5H810IHElmcSKL DPZkKV5Zi2QfTo1omFwljuYxcIDxzCexarzcFIwucBqL8p+8rptH5h7DdwZKOD6PEp+KXH BZP7Cr9eTs6PVuw/9TIHhlqNMOEkzIY2+TiBWNFKCNhl2AQEGIxQO4g3z/V0wU5nB2GPXG aydsyChatjvziDTXN58ysQ9eUoWdZaqxwow5jJSNY8yvko0OQ5d83/1OLDxdMSkNaoymJ9 IlgPJjsAQqbo2L3xOnm3pQPbDaE+UVPPOh5F6Ll5spgdWheeVr3aC8g5smX6BQ== From: Marek Vasut DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1755214546; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wbvZ1ekGJuwOIl7G04NQ4rzv98Rcb4Y1ERxLhOMI7n0=; b=tWV0c81nn9dTIUdRpFoitXRTFb8fiw64Kdxyb7zo1I3kzk7mF18y02YrVlgGgqUVdazU+/ N3hQmsShwqsCa2BPlm0m6WuA9qbwOr8d0ZBhYQfOUM6syhezdl3TQZjQVRcPKaYZiHmTJe QF4YuEXDuyTth/CSIrpynckaUQOFqjnn4NWX23qV0ATexXXYX2FoIyTQKYEVJHS8nMFDCX ecIJmfnoIEUGZt0sX+8/mb/M68WSq1Pg+TLbhQCKvcm2L8Rm46jyLIVTphjiVfx/YsTkgK W17DJdPyciUMS5TJgV5x70EZ10VOfXflput3V7TNhn3yEDwz4FsG0RY0/FSeRw== To: linux-arm-kernel@lists.infradead.org Cc: Marek Vasut , Geert Uytterhoeven , =?UTF-8?q?Niklas=20S=C3=B6derlund?= , Conor Dooley , Krzysztof Kozlowski , Magnus Damm , =?UTF-8?q?Niklas=20S=C3=B6derlund?= , Rob Herring , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH v3] arm64: dts: renesas: r8a779g3: Update thermal trip points on V4H Sparrow Hawk Date: Fri, 15 Aug 2025 01:34:57 +0200 Message-ID: <20250814233529.191874-1-marek.vasut+renesas@mailbox.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-MBO-RS-META: ro33ojtzrzd8qiioe6n1mqqa58ybn7rr X-MBO-RS-ID: 23a44379a17920dd7c0 Since the Sparrow Hawk has a smaller PCB than the White Hawk, it tends to generate more heat. To prevent potential damage to the board, adjust the temperature trip points. Add four "passive" trip points which increasingly throttle the CPU to prevent overheating. The first trip point at 68°C disables the 1.8 GHz and 1.7 GHz modes and limits the CPU to 1.5 GHz frequency. The second trip point at 72°C disables the 1.5 GHz mode and limits the CPU to 1.0 GHz frequency. The third trip point at 76°C uses thermal-idle to start inserting idle cycles into the CPU instruction stream to cool the CPU cores down. The fourth and last trip point at 80°C disables the 1.0 GHz mode and limits the CPU to 500 MHz frequency. In case the SoC heats up further, in case either of the thermal sensors readings passes the 100°C, a thermal shutdown is triggered to prevent any damage to the hardware. Reviewed-by: Geert Uytterhoeven Reviewed-by: Niklas Söderlund Signed-off-by: Marek Vasut --- Cc: Conor Dooley Cc: Geert Uytterhoeven Cc: Krzysztof Kozlowski Cc: Magnus Damm Cc: "Niklas Söderlund" Cc: Rob Herring Cc: devicetree@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org --- V2: Add RB from Niklas V3: - Sort DT nodes - Update comment on idle states, note the 0..80% - Add RB from Geert --- .../dts/renesas/r8a779g3-sparrow-hawk.dts | 137 ++++++++++++++++++ 1 file changed, 137 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts index 1f44005e1a11..75b1b789ae1d 100644 --- a/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts +++ b/arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts @@ -38,6 +38,7 @@ /dts-v1/; #include +#include #include "r8a779g3.dtsi" @@ -189,6 +190,41 @@ vcc_sdhi: regulator-vcc-sdhi { }; }; +/* Use thermal-idle cooling for all SoC cores */ +&a76_0 { + #cooling-cells = <2>; + + a76_0_thermal_idle: thermal-idle { + #cooling-cells = <2>; + duration-us = <10000>; + exit-latency-us = <500>; + }; +}; + +&a76_1 { + a76_1_thermal_idle: thermal-idle { + #cooling-cells = <2>; + duration-us = <10000>; + exit-latency-us = <500>; + }; +}; + +&a76_2 { + a76_2_thermal_idle: thermal-idle { + #cooling-cells = <2>; + duration-us = <10000>; + exit-latency-us = <500>; + }; +}; + +&a76_3 { + a76_3_thermal_idle: thermal-idle { + #cooling-cells = <2>; + duration-us = <10000>; + exit-latency-us = <500>; + }; +}; + &audio_clkin { clock-frequency = <24576000>; }; @@ -801,3 +837,104 @@ &rwdt { &scif_clk { /* X12 */ clock-frequency = <24000000>; }; + +/* THS sensors in SoC, critical temperature trip point is 100C */ +&sensor1_crit { + temperature = <100000>; +}; + +&sensor2_crit { + temperature = <100000>; +}; + +&sensor3_crit { + temperature = <100000>; +}; + +&sensor4_crit { + temperature = <100000>; +}; + +/* THS sensor in SoC near CA76 cores does more progressive cooling. */ +&sensor_thermal_ca76 { + critical-action = "shutdown"; + + cooling-maps { + /* + * The cooling-device minimum and maximum parameters inversely + * match opp-table-0 {} node entries in r8a779g0.dtsi, in other + * words, 0 refers to 1.8 GHz OPP and 4 refers to 500 MHz OPP. + * This is because they refer to cooling levels, where maximum + * cooling level happens at 500 MHz OPP, when the CPU core is + * running slowly and therefore generates least heat. + */ + map0 { + /* At 68C, inhibit 1.7 GHz and 1.8 GHz modes */ + trip = <&sensor3_passive_low>; + cooling-device = <&a76_0 2 4>; + contribution = <128>; + }; + + map1 { + /* At 72C, inhibit 1.5 GHz mode */ + trip = <&sensor3_passive_mid>; + cooling-device = <&a76_0 3 4>; + contribution = <256>; + }; + + map2 { + /* At 76C, start injecting idle states 0..80% of time */ + trip = <&sensor3_passive_hi>; + cooling-device = <&a76_0_thermal_idle 0 80>, + <&a76_1_thermal_idle 0 80>, + <&a76_2_thermal_idle 0 80>, + <&a76_3_thermal_idle 0 80>; + contribution = <512>; + }; + + map3 { + /* At 80C, inhibit 1.0 GHz mode */ + trip = <&sensor3_passive_crit>; + cooling-device = <&a76_0 4 4>; + contribution = <1024>; + }; + }; + + trips { + sensor3_passive_low: sensor3-passive-low { + temperature = <68000>; + hysteresis = <2000>; + type = "passive"; + }; + + sensor3_passive_mid: sensor3-passive-mid { + temperature = <72000>; + hysteresis = <2000>; + type = "passive"; + }; + + sensor3_passive_hi: sensor3-passive-hi { + temperature = <76000>; + hysteresis = <2000>; + type = "passive"; + }; + + sensor3_passive_crit: sensor3-passive-crit { + temperature = <80000>; + hysteresis = <2000>; + type = "passive"; + }; + }; +}; + +&sensor_thermal_cnn { + critical-action = "shutdown"; +}; + +&sensor_thermal_cr52 { + critical-action = "shutdown"; +}; + +&sensor_thermal_ddr1 { + critical-action = "shutdown"; +}; -- 2.47.2