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 B7227C4725D for ; Mon, 22 Jan 2024 07:55:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type: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=QLL84BEE19+on/hDOVgHmVumgNPdtKM7DhFHPW/vHXo=; b=36CQsRGvOe6inDuzNBd7IoN8/c 3WdGFuUN8+sWkts0+njGnps4BojU/fycmVtVAMtaqsNzuOSaxIioc0FdYVdzfSArSCPysCVc+K835 zKQvJzEPBdhQjSpQcgL3l3Jve0ty2I0I5l7+0B4zAYyjDtz8hdeegxwbqUknU6YnqFlpfS5vj5zmg wuy2VIfyxcMkb3pObhj1d9AY5Ub9Z2IBGJC6DpHKWczc0gDwEbOZM3PqhIDW2LP6p3ewfUoBj7wJ0 nJqov7Or7p+77jBqNIoOI06zISfiGlbJUmch5FIdsYLgx5erUHB612WxeMUjQSoUqhESlqHBQZNYa 0VftEXsg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rRp9S-00AwRu-1J; Mon, 22 Jan 2024 07:55:26 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rRp9L-00AwPL-2P; Mon, 22 Jan 2024 07:55:24 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 132D2CE2863; Mon, 22 Jan 2024 07:55:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D660EC433F1; Mon, 22 Jan 2024 07:55:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705910117; bh=OlIF/YgaBAY0KyswtUOGGdnsqxNRgTdzZnKd+teQ718=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=uDyYzwoQ8xCvf7wsWZYBF72Aa+S38tDJDyaj4uJmgonltMWcHGjY/BO/Hy5cGn886 uoB70SMEzpuE9X/6YakmQOIYpELnIj9ehkCXV1+WZf50U6VVuTgakTKvseAj7U7QPX arbEXg1qPFoID/WpCszL6c7s8sTHRkAxAAVNV6x0pqoKhZae+KDBeMdLcWRNh6cxf8 Qfk8S809uuwjxvUmVu7ZljaalsBEU7KPIMi9oJ5xv4WO8lq7GIl0preIJw/EPsaEyK fL6s1jGVTBqLYrtGiNb7QMJkswWkL+vpPtIIdPmqymVXEV+CK8JtTmZlUP6+WvZ0nx GskgLhvwPsg6A== Message-ID: <01c61975-cc78-4045-8c60-bb11045a7c97@kernel.org> Date: Mon, 22 Jan 2024 08:55:13 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 5/8] clk: qcom: support for duplicate freq in RCG2 freq table Content-Language: en-US To: Ziyang Huang , mcoquelin.stm32@gmail.com Cc: alexandre.torgue@foss.st.com, richardcochran@gmail.com, p.zabel@pengutronix.de, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, linux-mediatek@lists.infradead.org, Praveenkumar I , Abhishek Sahu References: From: Krzysztof Kozlowski Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240121_235520_134230_5202AD2A X-CRM114-Status: GOOD ( 16.92 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 21/01/2024 13:42, Ziyang Huang wrote: > From: Praveenkumar I > > Currently RCG code looks up the frequency table during set > rate and return the first available frequency greater than > requested rate. If CLK_SET_RATE_PARENT flag is set then the > set_rate request will go to its parent otherwise the clock > framework will configure pre-div, m and n according to the > returned frequency table entry. In this case, it is assuming > that parent clock will run in the same frequency with which > pre-div, m and n has been derived. But it may be possible > that the parent clock supports multiple frequency and the > same frequency can be derived with different pre-div, m and > n values depending upon current frequency. Also, the same > frequency can be derived from different parent sources and > currently there is no option for having duplicate > frequencies in frequency table and choosing the best one > according to current rate. > > Now this patch adds the support for having duplicate > frequencies in frequency table. During set rate, it will > compare the actual rate for each entry with requested rate > and will select the best entry in which the difference will > be less. > > The existing functionality won’t be affected with this code > change since this code change will hit only if frequency > table has duplicate values. > > Change-Id: I97d9e1b55d8f3ee095f6f01729af527ba90e50e5 > Signed-off-by: Abhishek Sahu > (cherry picked from commit 775e7d3b69ffc97afb5bd5a6c9c423f2f4d8a0b2) > Signed-off-by: Praveenkumar I > > Change-Id: If10193fc79a3c1375ab73597813745ff1f4df0ad Please run scripts/checkpatch.pl and fix reported warnings. Some warnings can be ignored, but the code here looks like it needs a fix. Feel free to get in touch if the warning is not clear. Best regards, Krzysztof