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[78.11.189.27]) by smtp.googlemail.com with ESMTPSA id l18-20020adfe592000000b001f064ae9830sm2007779wrm.37.2022.03.16.09.28.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Mar 2022 09:28:51 -0700 (PDT) Message-ID: <662981fe-7cf4-b0e6-2d43-3f33a53a6abd@canonical.com> Date: Wed, 16 Mar 2022 17:28:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH 2/3] dt-bindings: timer: Document arm,cortex-a7-timer for arch timer Content-Language: en-US To: Kuldeep Singh , Marc Zyngier , Mark Rutland , Daniel Lezcano , Thomas Gleixner , Rob Herring Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org References: <20220316095433.20225-1-singh.kuldeep87k@gmail.com> <20220316095433.20225-3-singh.kuldeep87k@gmail.com> From: Krzysztof Kozlowski In-Reply-To: <20220316095433.20225-3-singh.kuldeep87k@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 16/03/2022 10:54, Kuldeep Singh wrote: > Renesas RZ/N1D platform uses compatible "arm,cortex-a7-timer" in > conjugation with "arm,armv7-timer". Since, initial entry is not > documented, it start raising dtbs_check warnings. > > ['arm,cortex-a7-timer', 'arm,armv7-timer'] is too long > 'arm,cortex-a7-timer' is not one of ['arm,armv7-timer', 'arm,armv8-timer'] > 'arm,cortex-a7-timer' is not one of ['arm,cortex-a15-timer'] > > In general, removing an existing entry is mostly devastating considering > backward compatibility. Therefore, document it. How removing undocumented and unused compatible is devastating for backwards compatibility? I don't see it. DTS is rather wrong, not bindings. Otherwise please explain it more, why DTS is correct. Best regards, Krzysztof 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 438E5C433F5 for ; Wed, 16 Mar 2022 16:30:20 +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:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yldzba6TTC+a/bP5Gv+gnKnKHzQilJi69HSo7C/QAGg=; b=x+ZO21t8SVuD23 ITWgVxiqthgvaRtj2uulrzPOv1ovaLxBecHKcEMaMPXyXF07SyH/3BgpsTCb23IAJGR+/VCcoK247 U/3BGC31dKketzq4ZCvctvHsZPAXGs8ICLbzCqf57aQUCRHPRA4QvLWtdKQEd/sW7ntQOI8XXRBti ++hS4EFu4CxnlnCG91Nu7bSo7mIl4cRGJOtdthMGlpvc0ZEpmmSzb/0RYuA7+0T5FkTfoHTQ7JPUq 8hzOE4QF4Oo9yRAGZciiPpfTSvxz26kKUBoT6i+1u/AS0SaFKQ7hq8ii4Dx1yY7ey6Hj7uJOr6bqS Au27rs8fyZHiqw8DviWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUWW9-00Dn63-PI; Wed, 16 Mar 2022 16:28:57 +0000 Received: from smtp-relay-internal-1.canonical.com ([185.125.188.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUWW6-00Dn5S-77 for linux-arm-kernel@lists.infradead.org; Wed, 16 Mar 2022 16:28:55 +0000 Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id 63FA83F220 for ; Wed, 16 Mar 2022 16:28:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1647448132; bh=O9azuf7ICO8h5uyN+uYKd3/hmAqYJNPc/YeUIk6IvOY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q0qgCv8g85usPyzQsDtGgDFalJ7TfoRPzDbFubrVduaO+EnSR+Jwmho7GLJBT0her m2eVXmy2o6L443/C8vl81t9iWwgM8obJMbAfXS76tirzzcbUlK5DXTiZrQO1Ar5oPt 74qqjrdoPuO9b4cjO9PjBSiOMv+cuayW1niULMz2Ypw5LEgo95ozpwDRFUvmHkjEUH P1IDwxi+JJcabZhL/vI1NBq6fy4TXvZ4v5l89off3mcM4d2xRD27ezXXid8LKFHjwG g+gczEkKmWsctrK7Bm0tEJYxwggi9AGbIglwWvErO+7hig46FduXvlgo7hWlMcDn3A DHcDtwHL5L+iw== Received: by mail-wm1-f69.google.com with SMTP id c19-20020a05600c0ad300b00385bb3db625so2989944wmr.4 for ; Wed, 16 Mar 2022 09:28:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=O9azuf7ICO8h5uyN+uYKd3/hmAqYJNPc/YeUIk6IvOY=; b=gzOkJIfWB65FrD3djE5Wn3etHan0EMBxextcVK0Ik//MDGeE4s6d4dBChNIyfC3uSB dCXeCULD4FasFYhEc7e9cWwfRSq8zVOrqhAwIwTGI267TTas7XK/w7RCv426u5OYKZ8D 1X/8RWiHyMf8rt6dCDdoTd+hMeRqXLesvPrWwDJ3TrxYLmigRH+jYgsaOwW76+BpSGEt mFqoGGD5dZmOcB45JNcTX6+Xd4ABy7v/wrXLDkdPt2/T2viKSyvozi/lUStJF/bQej/4 jfBi1D7Sx8N3FGnpuCXfjkrrn4pqwP2yzDCNMB7HkAZWJyYQI6LAID6SGSVV+08NkuwJ Ppjw== X-Gm-Message-State: AOAM5337OaLYdRNq/4O1DHYBmwdNDUlev4lTrueX8LZOtsEDVyVhpRE0 WNgLsQ1ZW8ATTLPwGJSFDg8i7gtGkz9OYzNkmyZZYNX36Ikyd1vRd6BiCmd+TNahyQ77tdtEAE7 qpvgEb0rD4kXv684T8DpYZbK9wJnyMI5+cWevJfsCArJ60WvbQBcA X-Received: by 2002:a05:600c:22c4:b0:38c:70f5:25a9 with SMTP id 4-20020a05600c22c400b0038c70f525a9mr399240wmg.119.1647448132150; Wed, 16 Mar 2022 09:28:52 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyKAKAWokuZKgPZXqwJlDzsHHWTVsJ9pCwRX+QtYBaOkXVUSCX+5SlHY5BD4mQkdYO5g15k/Q== X-Received: by 2002:a05:600c:22c4:b0:38c:70f5:25a9 with SMTP id 4-20020a05600c22c400b0038c70f525a9mr399217wmg.119.1647448131987; Wed, 16 Mar 2022 09:28:51 -0700 (PDT) Received: from [192.168.0.17] (78-11-189-27.static.ip.netia.com.pl. [78.11.189.27]) by smtp.googlemail.com with ESMTPSA id l18-20020adfe592000000b001f064ae9830sm2007779wrm.37.2022.03.16.09.28.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Mar 2022 09:28:51 -0700 (PDT) Message-ID: <662981fe-7cf4-b0e6-2d43-3f33a53a6abd@canonical.com> Date: Wed, 16 Mar 2022 17:28:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH 2/3] dt-bindings: timer: Document arm, cortex-a7-timer for arch timer Content-Language: en-US To: Kuldeep Singh , Marc Zyngier , Mark Rutland , Daniel Lezcano , Thomas Gleixner , Rob Herring Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org References: <20220316095433.20225-1-singh.kuldeep87k@gmail.com> <20220316095433.20225-3-singh.kuldeep87k@gmail.com> From: Krzysztof Kozlowski In-Reply-To: <20220316095433.20225-3-singh.kuldeep87k@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220316_092854_429919_49DA68A7 X-CRM114-Status: GOOD ( 11.96 ) 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 16/03/2022 10:54, Kuldeep Singh wrote: > Renesas RZ/N1D platform uses compatible "arm,cortex-a7-timer" in > conjugation with "arm,armv7-timer". Since, initial entry is not > documented, it start raising dtbs_check warnings. > > ['arm,cortex-a7-timer', 'arm,armv7-timer'] is too long > 'arm,cortex-a7-timer' is not one of ['arm,armv7-timer', 'arm,armv8-timer'] > 'arm,cortex-a7-timer' is not one of ['arm,cortex-a15-timer'] > > In general, removing an existing entry is mostly devastating considering > backward compatibility. Therefore, document it. How removing undocumented and unused compatible is devastating for backwards compatibility? I don't see it. DTS is rather wrong, not bindings. Otherwise please explain it more, why DTS is correct. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel