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=-11.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 D6F2FC4338F for ; Mon, 16 Aug 2021 21:15:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A412660F41 for ; Mon, 16 Aug 2021 21:15:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233521AbhHPVQZ (ORCPT ); Mon, 16 Aug 2021 17:16:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231750AbhHPVQY (ORCPT ); Mon, 16 Aug 2021 17:16:24 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D2EFC061764 for ; Mon, 16 Aug 2021 14:15:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To: Subject:Sender:Reply-To:Content-ID:Content-Description; bh=IahjxOjONTR/ookqE8d4dqz7vyXyxyY75ZAKcOKZ4/g=; b=KrjdBp9hPKqCjKkdf9QIyA/8DC A2/8vnyPlskyGmX2CMA5jNYlCfD69t4++k6bzppK2tVLwxmgOu1yqBfTxz5/CcgHMw3ZSF9vxfivu 5HCH6pGvltU+InrsBIWe6tOrLTP+v6b5mHGcjYqw3/50W2qBbcln7KPKOMBFpiEJAZrZVkmRQuoDh tGFQJXbEkgZdPuDfCL5I/MMFeLQ5iAZzvZDwafnvMaWpR51RiOl70CFlltljWmjoFD5jX6mtksTHD /kKJf004en4WzF9gjjg7tUWCYUYkVPCaRB1M5G1v2UbdHQsYrQNdjPMgyo+Q70cIbesSKu+Fub2hm 2HgzeXaA==; Received: from [2601:1c0:6280:3f0::aa0b] by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mFjxY-000JHD-5s; Mon, 16 Aug 2021 21:15:52 +0000 Subject: Re: [PATCH] ptp: ocp: don't allow on S390 To: Jonathan Lemon Cc: netdev@vger.kernel.org, Richard Cochran References: <20210813203026.27687-1-rdunlap@infradead.org> <20210816210914.qkyd4em4rw3thbyg@bsd-mbp.dhcp.thefacebook.com> From: Randy Dunlap Message-ID: <16acf1ad-d626-b3a3-1cad-3fa6c61c8a22@infradead.org> Date: Mon, 16 Aug 2021 14:15:51 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210816210914.qkyd4em4rw3thbyg@bsd-mbp.dhcp.thefacebook.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 8/16/21 2:09 PM, Jonathan Lemon wrote: > On Fri, Aug 13, 2021 at 01:30:26PM -0700, Randy Dunlap wrote: >> There is no 8250 serial on S390. See commit 1598e38c0770. > > There's a 8250 serial device on the PCI card. Its been > ages since I've worked on the architecture, but does S390 > even support PCI? Yes, it does. >> Is this driver useful even without 8250 serial? > > The FB timecard has an FPGA that will internally parse the > GNSS strings and correct the clock, so the PTP clock will > work even without the serial devices. > > However, there are userspace tools which want to read the > GNSS signal (for holdolver and leap second indication), > which is why they are exposed. So what do you recommend here? thanks. -- ~Randy