From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 2B14C3E44EB; Thu, 30 Jul 2026 08:54:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785401670; cv=none; b=EeLp/SL7fl6P7vl5e5q3LBWUs14oxDWXYR60C7nwpiVrqzCTD+PgBelSDJddXaxqVQ3FF1hqDhAqyY2sj2tx6Jw3abZFVRCWdNeevAL7dKJpB0LFRYFgAoUlVb5bpVd+FEU89NHbSrFi48k59XQVcsGeqEPlG3rU88ByCaElR6o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785401670; c=relaxed/simple; bh=kg7wm4Rn2DAaDAUknEYYyu47GmqMjlGONc2jmWrgMew=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KcKaKHoTiCF0W3I2VTT9tUZDbdsi2CbBeZOmMguWNLLwF4Uj1dXM7hJy9mH90gxUtS++FQJ07HWlKB1iHYIqAT0w2lNGaUeqO/nPgb4DgIZC5S3LOYd1UDu/GHoxw2e4S3YpW1TEkDq7t/hXgmuo6DiBqs+sw7X+I5a9cPtNgt0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EzNks7DH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EzNks7DH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C6B71F00AC4; Thu, 30 Jul 2026 08:54:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785401668; bh=ZByW0d9Cdpsyjv8QIk+DNR+PKdVmMUnUkPl8Y2F6nP0=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=EzNks7DHt0sEASAszaGXmT0VsGZKL3x5FCQbWEV+Dg4vmb4IC2LkJGw1PicQkXFox 3ADlbxyiHOFRGb2OZl7/o/gXfwfcRx7ce0EgpTAAcca0i/RaHbd92gmPnLDi4+ojAj uaGH305BQgoOzZYM5gXb+ecbC40W7uGJFjdrD1lujBQRnSK0xRGw7eDfIMVagEfFON 52cRH5yBlEmPtwdCSc7s53d/bYW8d/0+sw4vBXx3OqPncSqwlzh1JeqZ02hl7xVXrP rmwj7e0bpcGg+jtOkEVwSbaMTlh2x6xdvSxTT4Yz5qoQUAibSe7Tm2AI20IfdSUHXz 5XKnkCiGNdECQ== Date: Thu, 30 Jul 2026 08:54:24 +0000 From: Yixun Lan To: Aurelien Jarno Cc: linux-kernel@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "open list:RISC-V ARCHITECTURE" , "open list:RISC-V SPACEMIT SoC Support" Subject: Re: [PATCH v2 4/4] riscv: dts: spacemit: Add Milk-V Jupiter board (M1) Message-ID: <20260730085424-GKK76518@kernel.org> References: <20260729160749.1621415-1-aurelien@aurel32.net> <20260729160749.1621415-5-aurelien@aurel32.net> Precedence: bulk X-Mailing-List: spacemit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260729160749.1621415-5-aurelien@aurel32.net> Hi Aurelien, On 18:00 Wed 29 Jul , Aurelien Jarno wrote: > Add support for the Milk-V Jupiter board with the M1 CPU. The M1 differs > from the K1 only by its package, which provides improved cooling > performance and allows it to run at up to 1.8 GHz instead of 1.6 GHz. > > Add m1-opp.dtsi to define the 1.8 GHz operating point and the > corresponding core voltage, based on the upstream kernel. Include it > from m1-milkv-jupiter.dts. Raise the maximum buck1 voltage to 1.116V to > match the new operating point. > While checking the schematics, the buck1,2 provide power supply both for cpu core and AVDD09 domain - check schematics page 9/25 [1] the R81 is NC, so buck1,2 is actually all power supply, raise voltage will result high risk to damage the chip (overvoltage of AVDD09 domain), so a safe strategy would to test if M1 able to run at 1.8G without voltage change (still at 1.05v)? Link: https://github.com/milkv-jupiter/jupiter-files/blob/main/hardware/v1_0/jupiter-sch-v1_0.pdf [1] -- Yixun Lan (dlan) 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 CA6C5C54FD2 for ; Thu, 30 Jul 2026 08:54:47 +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=HkNOF8LCbFAhGPmch8Foq/ovoFGer6Z2jPWNMJs867g=; b=XHge9pUd5Be+mu Vv61hdW7+14rvPxYygXPKe8NDT5ingbVEP7Vne4lTN6wXWhmRxv3NINjdfOeddrvTKFIgm6wHVoDQ 08/tzvJv1ETzgAJKmLonGrtOhJsI6X/KfPILgF+shV9CbulZwT+6XQO7y/Or56RSFqmWqcEYX49Nl Cyj3YFhRU3LmGo+lIuIJ2SAm4t7TMRqAGOv+rkBPltsT6KmRaWMGVh9VYxGOgt/esh6VuGynhvfZF 3Otz2U9q0On++/FiBJSIGBg1uIHPU0mRDsaYZvKX7aQIeyeNYWq+xD2vJICVFHo5pIaTfsjrUS9la L0I8gFmv629pWZeKx1YA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wpMX8-00000009vkL-2IHV; Thu, 30 Jul 2026 08:54:30 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wpMX7-00000009vjp-0I8S for linux-riscv@lists.infradead.org; Thu, 30 Jul 2026 08:54:29 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5B9C5600BC; Thu, 30 Jul 2026 08:54:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C6B71F00AC4; Thu, 30 Jul 2026 08:54:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785401668; bh=ZByW0d9Cdpsyjv8QIk+DNR+PKdVmMUnUkPl8Y2F6nP0=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=EzNks7DHt0sEASAszaGXmT0VsGZKL3x5FCQbWEV+Dg4vmb4IC2LkJGw1PicQkXFox 3ADlbxyiHOFRGb2OZl7/o/gXfwfcRx7ce0EgpTAAcca0i/RaHbd92gmPnLDi4+ojAj uaGH305BQgoOzZYM5gXb+ecbC40W7uGJFjdrD1lujBQRnSK0xRGw7eDfIMVagEfFON 52cRH5yBlEmPtwdCSc7s53d/bYW8d/0+sw4vBXx3OqPncSqwlzh1JeqZ02hl7xVXrP rmwj7e0bpcGg+jtOkEVwSbaMTlh2x6xdvSxTT4Yz5qoQUAibSe7Tm2AI20IfdSUHXz 5XKnkCiGNdECQ== Date: Thu, 30 Jul 2026 08:54:24 +0000 From: Yixun Lan To: Aurelien Jarno Cc: linux-kernel@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "open list:RISC-V ARCHITECTURE" , "open list:RISC-V SPACEMIT SoC Support" Subject: Re: [PATCH v2 4/4] riscv: dts: spacemit: Add Milk-V Jupiter board (M1) Message-ID: <20260730085424-GKK76518@kernel.org> References: <20260729160749.1621415-1-aurelien@aurel32.net> <20260729160749.1621415-5-aurelien@aurel32.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260729160749.1621415-5-aurelien@aurel32.net> X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Hi Aurelien, On 18:00 Wed 29 Jul , Aurelien Jarno wrote: > Add support for the Milk-V Jupiter board with the M1 CPU. The M1 differs > from the K1 only by its package, which provides improved cooling > performance and allows it to run at up to 1.8 GHz instead of 1.6 GHz. > > Add m1-opp.dtsi to define the 1.8 GHz operating point and the > corresponding core voltage, based on the upstream kernel. Include it > from m1-milkv-jupiter.dts. Raise the maximum buck1 voltage to 1.116V to > match the new operating point. > While checking the schematics, the buck1,2 provide power supply both for cpu core and AVDD09 domain - check schematics page 9/25 [1] the R81 is NC, so buck1,2 is actually all power supply, raise voltage will result high risk to damage the chip (overvoltage of AVDD09 domain), so a safe strategy would to test if M1 able to run at 1.8G without voltage change (still at 1.05v)? Link: https://github.com/milkv-jupiter/jupiter-files/blob/main/hardware/v1_0/jupiter-sch-v1_0.pdf [1] -- Yixun Lan (dlan) _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv