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 X-Spam-Level: X-Spam-Status: No, score=-4.9 required=3.0 tests=BANG_GUAR,BAYES_00, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C9C6C4338F for ; Mon, 2 Aug 2021 00:42:03 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 016A9610A0 for ; Mon, 2 Aug 2021 00:42:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 016A9610A0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:MIME-Version:References:In-Reply-To: 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=pcwWePXwCvvnT/o+xiLJd5tSQIdIVxKNIn/dfnZGNdM=; b=z2NfbWdJqZRdBy C3AJ/IgC6QVO8uQd3Qr4Polx1s2rl5oAzVWZeddfPMG1vjL5GNpkVSzJIHFQITr4mMNN4Ry02xrL2 Ddnq8wDAOZuXstTv1U7TIAsUet9+ioclEu7+CGA+HkihRErurABtZS1LFgsj4a65gYrnsk7CPElkO XMKh59ofn5lrgXFrMwop6vYnZgPIxQp7+me3of1X8Lv/t0LR7FNluXQUPsIBpEhdzHl0vy9j0saHw yDURQ+r/HJidPvmn01jXzpJ1h3gMiszajFUp0j2YU8MqYu4EmPV6+q7z4vY0IZN+lrG7ksh3JgshP 5CGDa3RtI4uLXl5k4i3Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mALzd-00EV3N-VI; Mon, 02 Aug 2021 00:39:46 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mALzZ-00EV2r-VZ for linux-arm-kernel@lists.infradead.org; Mon, 02 Aug 2021 00:39:43 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EB766D6E; Sun, 1 Aug 2021 17:39:36 -0700 (PDT) Received: from slackpad.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 51C8A3F66F; Sun, 1 Aug 2021 17:39:35 -0700 (PDT) Date: Mon, 2 Aug 2021 01:38:51 +0100 From: Andre Przywara To: Maxime Ripard Cc: Chen-Yu Tsai , Jernej Skrabec , Rob Herring , Icenowy Zheng , Samuel Holland , linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Ondrej Jirman Subject: Re: [PATCH v8 00/11] arm64: sunxi: Initial Allwinner H616 SoC support Message-ID: <20210802013851.13375f0f@slackpad.fritz.box> In-Reply-To: <20210726145230.uevhinsrvo7gtuty@gilmour> References: <20210723153838.6785-1-andre.przywara@arm.com> <20210726145230.uevhinsrvo7gtuty@gilmour> Organization: Arm Ltd. X-Mailer: Claws Mail 3.17.1 (GTK+ 2.24.31; x86_64-slackware-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210801_173942_147336_446D0D1B X-CRM114-Status: GOOD ( 25.35 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 26 Jul 2021 16:52:30 +0200 Maxime Ripard wrote: Hi, > On Fri, Jul 23, 2021 at 04:38:27PM +0100, Andre Przywara wrote: > > Hi, > > > > another try on the basic Allwinner H616 support, now on top of 5.14-rc1. > > > > This time I dropped the USB support from the basic series, to split off > > the discussion, and simplify the core SoC support. I will post the USB > > series soon, to be applied on top. > > I kept the RTC support in, even though this is still under discussion, > > because this is important to keep future DT files compatible with this > > kernel. > > Honestly, I don't want to support something we don't guarantee if it's > at the expense of making something we do guarantee more complicated. I don't ask for or provide guarantees, but I think we can at least *try* to keep this compatible. This version works at the moment, and should also work with future DTs - within the limits of the current driver, so only using the RC clock. It allows to later improve the accuracy by adding better input clocks - and later DT/driver combinations can make use of this. > Delaying the clock tree description to sometime in the future will only > further complicate the probe part of the driver, and there's far too > many special cases already. I don't see how this would complicate probing beyond what Allwinner brought upon us already anyway: no LOSC crystal input in this package version, but having this pin in some other SoC sharing this die (according to some BSP) sources. We can't expect a super clean driver with those HW design choices. If we really cannot keep the DT compatible, fair enough: that's what it is (there is no guarantee!), but at least we have tried. Cheers, Andre _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel