From patchwork Tue Apr 4 10:11:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13199786 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 0CCF4C77B6C for ; Tue, 4 Apr 2023 12:34:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E505910E280; Tue, 4 Apr 2023 12:34:35 +0000 (UTC) Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) by gabe.freedesktop.org (Postfix) with ESMTPS id F3D6310E280 for ; Tue, 4 Apr 2023 12:34:33 +0000 (UTC) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id 547075821A5; Tue, 4 Apr 2023 08:34:33 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Tue, 04 Apr 2023 08:34:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h=cc :cc:content-transfer-encoding:content-type:content-type:date :date:from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to; s=fm3; t= 1680611673; x=1680618873; bh=vktqaF0FgAymg4NNxU36k4MdhmcX/jyIc5r ZP0GxZpg=; b=s31JpOYw0Is5/H0qPRNsBySPDf1dQBp9BiLEi1UH63Z8qrcRm43 3DMo29YnPJ4snvAS11TquNBAL2ntJsozPZVDmeUu8Nge5mXlX67OlvzaMyiRJO65 eiLI7YLqbzqrMePEjKi2vhn3+chumIlPmc+gEyzBwPqLAKZlgVG2U/FWQ712kGYN SBqX0yHX2UISw+HaGQu3+5yEpJCBy8Gg3SEopFayC7trIBwXQar8a04ifJVCzlcx 7m9X7rRE/WsOBD8Bi/oXu5ybrxRagavE/CV3cxrlG3I56LAW8FOBrI4tbnR4DsE0 dUpn63oR1Yf4+vo+AWVW7NVueXk6KK/hZRA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:content-type:date:date:feedback-id:feedback-id :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t= 1680611673; x=1680618873; bh=vktqaF0FgAymg4NNxU36k4MdhmcX/jyIc5r ZP0GxZpg=; b=McnDD3pDNWe5jFSRLdTPcaF+hy3ZRwuouf/pwuemAuy6aNDVToF UXsRkckGcQVvL4wIBsh59dlJWquRuvoCcBiFQAWuFNtAEaoqD3MRgH4eP2XjvZPU 9kyplbzY4f/4p9Nt+JWsukMTCp2nsbr+jHK1DEDYcsh/BmbqvnPhsbWo4U9ODM1p YCdKc6RIZruxVs8fhSLu669rpCe6njyOv4i8Ffd+xsQ43ojTMnveMZ4d9JjNVd90 MRpduVH5UZ7BuSaofUdXWhSpnpNx9WqWeOzgmgUbgniXsnEz1v3bvbrlbkevdXB9 WwuJZOUMHI20X//ctpUYDIeu+2oaINML34A== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdeiledgheefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephfffufggtgfgkfhfjgfvvefosehtjeertdertdejnecuhfhrohhmpeforgig ihhmvgcutfhiphgrrhguuceomhgrgihimhgvsegtvghrnhhordhtvggthheqnecuggftrf grthhtvghrnhepvedvleeijeegvdekffehkeehieelhfeggfffheetkeeuledvtdeuffeh teeltdffnecuvehluhhsthgvrhfuihiivgepvdenucfrrghrrghmpehmrghilhhfrhhomh epmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 4 Apr 2023 08:34:31 -0400 (EDT) From: Maxime Ripard Date: Tue, 04 Apr 2023 12:11:11 +0200 Subject: [PATCH v3 21/65] clk: davinci: da8xx-cfgchip: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v3-21-9a1358472d52@cerno.tech> References: <20221018-clk-range-checks-fixes-v3-0-9a1358472d52@cerno.tech> In-Reply-To: <20221018-clk-range-checks-fixes-v3-0-9a1358472d52@cerno.tech> To: Michael Turquette , Stephen Boyd , =?utf-8?q?Andreas_F=C3=A4rber?= , Manivannan Sadhasivam , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , Max Filippov , Charles Keepax , Richard Fitzgerald , Maxime Coquelin , Alexandre Torgue , Luca Ceresoli , David Lechner , Sekhar Nori , Abel Vesa , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Matthias Brugger , Geert Uytterhoeven , Dinh Nguyen , Peter De Schrijver , Prashant Gaikwad , Thierry Reding , Jonathan Hunter , Ulf Hansson , Linus Walleij , David Airlie , Daniel Vetter , Vinod Koul , Kishon Vijay Abraham I , Alessandro Zummo , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Paul Cercueil , Orson Zhai , Baolin Wang , Chunyan Zhang X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2441; i=maxime@cerno.tech; h=from:subject:message-id; bh=5lyHHQpQWAiRxeRx338/dvOcr5jka0snE7w9nKtfF/s=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCna37cejXnpcyT/Z7qC/p1vZn+6HgbunqjVUO07ae/8mx4L pCdv6ihlYRDjYpAVU2SJETZfEndq1utONr55MHNYmUCGMHBxCsBEjvAz/I/bNkn4yrcZjFuscw8LTH /y5JGdp4f0at9LXz1FtJas33iJkeHxorQr7axm37f8jCibcFgra7tbA1vRspOb2Y5yid7QL2EHAA== X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-rtc@vger.kernel.org, alsa-devel@alsa-project.org, patches@opensource.cirrus.com, linux-actions@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-stm32@st-md-mailman.stormreply.com, linux-renesas-soc@vger.kernel.org, linux-phy@lists.infradead.org, linux-mediatek@lists.infradead.org, Maxime Ripard , linux-tegra@vger.kernel.org, linux-mips@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The Davinci DA8xxx cfgchip mux clock implements a mux with a set_parent hook, but doesn't provide a determine_rate implementation. This is a bit odd, since set_parent() is there to, as its name implies, change the parent of a clock. However, the most likely candidate to trigger that parent change is a call to clk_set_rate(), with determine_rate() figuring out which parent is the best suited for a given rate. The other trigger would be a call to clk_set_parent(), but it's far less used, and it doesn't look like there's any obvious user for that clock. So, the set_parent hook is effectively unused, possibly because of an oversight. However, it could also be an explicit decision by the original author to avoid any reparenting but through an explicit call to clk_set_parent(). The latter case would be equivalent to setting the flag CLK_SET_RATE_NO_REPARENT, together with setting our determine_rate hook to __clk_mux_determine_rate(). Indeed, if no determine_rate implementation is provided, clk_round_rate() (through clk_core_round_rate_nolock()) will call itself on the parent if CLK_SET_RATE_PARENT is set, and will not change the clock rate otherwise. __clk_mux_determine_rate() has the exact same behavior when CLK_SET_RATE_NO_REPARENT is set. And if it was an oversight, then we are at least explicit about our behavior now and it can be further refined down the line. Acked-by: David Lechner Signed-off-by: Maxime Ripard --- drivers/clk/davinci/da8xx-cfgchip.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clk/davinci/da8xx-cfgchip.c b/drivers/clk/davinci/da8xx-cfgchip.c index 4103d605e804..c04276bc4051 100644 --- a/drivers/clk/davinci/da8xx-cfgchip.c +++ b/drivers/clk/davinci/da8xx-cfgchip.c @@ -229,6 +229,7 @@ static u8 da8xx_cfgchip_mux_clk_get_parent(struct clk_hw *hw) } static const struct clk_ops da8xx_cfgchip_mux_clk_ops = { + .determine_rate = __clk_mux_determine_rate, .set_parent = da8xx_cfgchip_mux_clk_set_parent, .get_parent = da8xx_cfgchip_mux_clk_get_parent, }; @@ -251,7 +252,7 @@ da8xx_cfgchip_mux_clk_register(struct device *dev, init.ops = &da8xx_cfgchip_mux_clk_ops; init.parent_names = parent_names; init.num_parents = 2; - init.flags = 0; + init.flags = CLK_SET_RATE_NO_REPARENT; mux->hw.init = &init; mux->regmap = regmap;