From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from hall.aurel32.net (hall.aurel32.net [195.154.119.183]) (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 07F1438DC6E; Wed, 29 Jul 2026 15:08:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.154.119.183 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785337683; cv=none; b=dCUWIHJElEGoIRdVdKFub5IfdojbIJeToS+QyzDzqof2ZrrfzIy+9tsKrmk6/RvHlxo7MmwV3mdQuzZol3U1yfp8PHvF/Mbl4+1samkqjeYXzCBCVRcHpLvvtNicbTI7cNn9gFmjt4MROqyy6bhx/wMHOWfYVHfspfklOpKThq8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785337683; c=relaxed/simple; bh=TRu5LBC9IX2RNboyK4GHkffEZ9Z5hCIQI7yrSyvCfns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Lu8qTbYKNapKpqEPF6Wn1b8EN0fHchztTVuA07z9oB2ebPCJC1TOSKwPfxoAxOFyeYey7oBhqOE+8Q81LblUSYoNZzzf2kyI1+yp4L96MPkTyVh72fAmkkRUNOfUupGkuKUTms+/2Y0uhctrmoNc0gbX2IWzDQj7w2S+2Wddl7w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=aurel32.net; spf=pass smtp.mailfrom=aurel32.net; dkim=pass (2048-bit key) header.d=aurel32.net header.i=@aurel32.net header.b=bRZ/f3du; arc=none smtp.client-ip=195.154.119.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=aurel32.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aurel32.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=aurel32.net header.i=@aurel32.net header.b="bRZ/f3du" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=aurel32.net ; s=202004.hall; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Content-Type:From:Reply-To: Subject:Content-ID:Content-Description:X-Debbugs-Cc; bh=9GCHA7xIhaJsYc9K/gElGpvzs0h61VGIvTXBIIzT2QY=; b=bRZ/f3dulCdpILjEGzoCG4+VTe /Em5J0+JlBtudmbldAHNgxiIEPvUu10pIbGwkAaNea6V4ZmN36zoE9Gi+9OmUCMy+jVtpOXh/1ZnB gdhwj5tslbjsk82fRYaoZ1nvfolc1PieR8mlb84xaSkq5bZ0+kkWcWekGeC9oa5RK1SAFOZvNvySO 8EhPLcVuvX72VepmP193BjG6bEwHyTSRQpZi/XCD8EF6vu0o4GaUuICkDrKJgmfZMF5meH2Dpyoeh XhH3ErAZJO+b9+tCOefK6fOeF2Gk/VBbPZILawjVF0EbwVt+5XlSjaXO5IlHUGEQaXUDt9WIp4iay xl6GjJQQ==; Received: from authenticated user by hall.aurel32.net with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wp5su-00000002eC4-1KJw; Wed, 29 Jul 2026 17:07:52 +0200 From: Aurelien Jarno To: linux-kernel@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Han Gao , Chukun Pan Cc: Aurelien Jarno , stable@vger.kernel.org, devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-riscv@lists.infradead.org (open list:RISC-V ARCHITECTURE), spacemit@lists.linux.dev (open list:RISC-V SPACEMIT SoC Support) Subject: [PATCH 3/6] riscv: dts: spacemit: k1-orangepi-rv2: fix maximum CPU core voltage Date: Wed, 29 Jul 2026 17:02:20 +0200 Message-ID: <20260729150722.1598630-4-aurelien@aurel32.net> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260729150722.1598630-1-aurelien@aurel32.net> References: <20260729150722.1598630-1-aurelien@aurel32.net> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On the OrangePi RV2 board, the buck1 and buck2 voltage regulators, which supply the CPU core voltage, are configured with a maximum output voltage of 3.45V, while the highest operating point requires only 1.050V. This means that a kernel bug, OPP misconfiguration, or privileged userspace could request a voltage above the safe operating limit, causing possible permanent CPU damage. Set the maximum regulator voltage to 1.050V instead. Fixes: c02c047b925c ("riscv: dts: spacemit: Define the P1 PMIC regulators for OrangePi RV2") Link: https://sashiko.dev/#/message/20260728211020.1248676-2-aurelien%40aurel32.net Cc: stable@vger.kernel.org Signed-off-by: Aurelien Jarno --- arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts index 7c49bce427f30..b907a1396b21f 100644 --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts @@ -164,14 +164,14 @@ pmic@41 { regulators { buck1 { regulator-min-microvolt = <500000>; - regulator-max-microvolt = <3450000>; + regulator-max-microvolt = <1050000>; regulator-ramp-delay = <5000>; regulator-always-on; }; buck2 { regulator-min-microvolt = <500000>; - regulator-max-microvolt = <3450000>; + regulator-max-microvolt = <1050000>; regulator-ramp-delay = <5000>; regulator-always-on; }; -- 2.53.0