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 2AC9239934A; Mon, 20 Apr 2026 21:47:11 +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=1776721634; cv=none; b=VMCdvyB5SsBuwkbObupZjFPf0hgoSkFeBeMdSHhvUVK2pfoAJmGuzfhtE1uQklxmt9UT7xkq6UIb3tF77INnlF7NPF3HSpjRtQB7n+M0pMABloJdVXn2zqwF/rls35FQjCMsfKk2g040oSSAy/2L1XxHsvCVsZa63R8gU5nFtsk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776721634; c=relaxed/simple; bh=CLLSksC9+qDIWHIyI4I9YQ5LoX/FB7wYqB2vmAruL5I=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=aqplI6I5IJZ7uUbloz5ax59A0r2AhzVBHQBBCjX9MvNvDNaf740Fus2Au+yPeIUyhQXKeSe6E6hIbK+132nhtHnr2djXxXMNHxz3Q1+owZDpOL6gZuxJsvSPTd1NvGsZzN2Om5Vrz/7ktHWG8rV2+uPUncEvrUvTdLSGDxhuX3Q= 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=HtBKX5/I; 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="HtBKX5/I" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=aurel32.net ; s=202004.hall; h=In-Reply-To:Content-Transfer-Encoding:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:From:Reply-To: Subject:Content-ID:Content-Description:X-Debbugs-Cc; bh=7vNfyFBOnLNbtekuQiXkiG2gtWPCS+o1h1We+Flr9lo=; b=HtBKX5/Il95oqVlLVCfX19riBr g776peq+rh+OfYNsix46NL1UtKwuYZnaex5rnrF3cuzaIE7k8S6rNIK55Iolw5b08FauIzm73h9c0 /Ob57V+UtL6X3lmx1DkjhQR2MQawjHwjB1K9zY8wsAU4NeowmqR+xYBkE2z4EMb1gKhtbpWJbCuFt zYbeSYp+4G0jdoLOLgNweuBIs0lOZDVDYAH3auT23Qx8R04lWxFwzWMD0onNH10sL9YC1GVYt+HYu +gNxIKE6cZVQSKRXCTTXutKBm59tMW/ltoJawkhhqZNpj3iR3hIM1VhVVktrXIOGOBK/Cq1JrhqEX wUh1pfvA==; 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 1wEvyu-0000000DyKx-2dhQ; Mon, 20 Apr 2026 23:16:36 +0200 Date: Mon, 20 Apr 2026 23:16:35 +0200 From: Aurelien Jarno To: Anand Moon Cc: Shuwei Wu , "Rafael J. Wysocki" , Viresh Kumar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, devicetree@vger.kernel.org Subject: Re: [PATCH v2 2/2] riscv: dts: spacemit: Add cpu scaling for K1 SoC Message-ID: Mail-Followup-To: Anand Moon , Shuwei Wu , "Rafael J. Wysocki" , Viresh Kumar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, devicetree@vger.kernel.org References: <20260410-shadow-deps-v2-0-4e16b8c0f60e@mailbox.org> <20260410-shadow-deps-v2-2-4e16b8c0f60e@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-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: User-Agent: Mutt/2.2.13 (2024-03-09) Hi Anand, On 2026-04-16 17:07, Anand Moon wrote: > After reviewing the Banana Pi F3 schematics, I confirmed that Buck1 and B= uck2 > Both supply the CORE_0V9 with 0.9V=C2=B11% rail. To resolve the restricti= on errors, > I expanded the voltage range in the DTS to 500,000=E2=80=93950,000 =C2=B5= V. >=20 > Additionally, I updated the DTS to map the second CPU cluster (cores 4=E2= =80=937) > to Buck2 to better align with the hardware's power distribution. Actually the output of Buck1 and Buck2 are connected together, so they=20 should always be configured with the same output voltage. And both=20 clusters should be mapped to both outputs. I also wonder why in the original patch the buck1 regulator is named=20 buck1_3v45, from the schematics, it should rather be called buck1_0v9. Regards Aurelien --=20 Aurelien Jarno GPG: 4096R/1DDD8C9B aurelien@aurel32.net http://aurel32.net From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AAB2EF5A8C7 for ; Mon, 20 Apr 2026 21:17:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bzzJDj9t2i+lm+wATntzjtkdsmRbTroPNigCEN/pVA4=; b=PBvHd1aLWpa0wn 2T6cn2St6ngXQvwUMkFpTrk09yZFyd6mKLI/Yun8h60XBfvGkxuZrl4sX7nGZtGqwIjr7yYW44RVJ 2JcEgLPK6tEqk5c6kOJFnDjNsbCkyhWO9KwGPSaMVzNmuKYpv2c2JdezqzIflmSB6yFAZ+0hw0tT2 ckdzohKwCs0Hlgbh8jUKlrisYEtGFsAyj8LMG3+S20R1xy0WdjVJ/wpOTqq3m1Lh+AVrG4/ZX2rVo WdWf7TaZ3WvJBERE0g7/MqwLtP5mEatFgUwdQ9KfvowjkyMUkh3+u1jb11YWM30mU808YaIDn+Ki2 Y5G0CM/cAsmr/IfP72RQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wEvz9-00000007fBz-2NhS; Mon, 20 Apr 2026 21:16:51 +0000 Received: from hall.aurel32.net ([2001:bc8:30d7:100::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wEvz6-00000007fBe-2FVQ for linux-riscv@lists.infradead.org; Mon, 20 Apr 2026 21:16:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=aurel32.net ; s=202004.hall; h=In-Reply-To:Content-Transfer-Encoding:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:From:Reply-To: Subject:Content-ID:Content-Description:X-Debbugs-Cc; bh=7vNfyFBOnLNbtekuQiXkiG2gtWPCS+o1h1We+Flr9lo=; b=HtBKX5/Il95oqVlLVCfX19riBr g776peq+rh+OfYNsix46NL1UtKwuYZnaex5rnrF3cuzaIE7k8S6rNIK55Iolw5b08FauIzm73h9c0 /Ob57V+UtL6X3lmx1DkjhQR2MQawjHwjB1K9zY8wsAU4NeowmqR+xYBkE2z4EMb1gKhtbpWJbCuFt zYbeSYp+4G0jdoLOLgNweuBIs0lOZDVDYAH3auT23Qx8R04lWxFwzWMD0onNH10sL9YC1GVYt+HYu +gNxIKE6cZVQSKRXCTTXutKBm59tMW/ltoJawkhhqZNpj3iR3hIM1VhVVktrXIOGOBK/Cq1JrhqEX wUh1pfvA==; 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 1wEvyu-0000000DyKx-2dhQ; Mon, 20 Apr 2026 23:16:36 +0200 Date: Mon, 20 Apr 2026 23:16:35 +0200 From: Aurelien Jarno To: Anand Moon Cc: Shuwei Wu , "Rafael J. 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