From patchwork Fri Nov 4 13:17:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13031809 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 ADFAFC43217 for ; Fri, 4 Nov 2022 13:20:45 +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:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ryNmbFJM4diOGk8okA5Tqnn27dGfir9PKyxk50XOcPc=; b=YTVMc741ZbeH+zKDNCNlgKBz7/ rdfG2bqmHBBKEDdn3TKJ88S5B9VOap++ymj4vUP/N5nzvu1aOZh+D19HVTvyK+CTbRi2YbxmJw2iF nFf2HKNvuQRjrUpwz5a9HwKx5rgsCXF8pHRDMQHWq6iHv/78yKhXhm/auAMEaDfAXyIl23c2ACyi3 gCPmqNiLoV80hgj7obPLm1lW6g5L7vnC4MpgjryWaeudpq1GoAaXtDA7rMTAFfzpp0QqRQy8dSLF8 XARy0A/77z6g+sBGrxBg/tnz5A5B4JCQrUMVpbhaBtcqyMburdXOub18qxvN14xQxJuvXE0Jmq0Bk cDnQ7yNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oqwch-003eKK-ET; Fri, 04 Nov 2022 13:20:39 +0000 Received: from new1-smtp.messagingengine.com ([66.111.4.221]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oqwao-003cvB-MC; Fri, 04 Nov 2022 13:18:45 +0000 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id E1D0E580558; Fri, 4 Nov 2022 09:18:41 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Fri, 04 Nov 2022 09:18:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h=cc :cc:content-transfer-encoding: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=1667567921; x= 1667575121; bh=ryNmbFJM4diOGk8okA5Tqnn27dGfir9PKyxk50XOcPc=; b=y ZOTQaSkMUBYQeuVZ/i7oVURymR8TVy1qgr7EHudwMPs9CxjDy9m08iDZTRUkxNCz 9vMcquerZa6C0uV9+MeKoSupX+AqG9uc/rteuxg7LiGHfimpYr4SqpkhFYrSzhyX k75O5SnT1b19L33C7oHAdWp+smugMk83Iat4NZH/ObwTHzTEXis3NYyj6kKq5oJq LvJme0ZPRwcNI+B6aHhVWX26I87RCVF/2p+8Cq33aI/LZxKrHlK6JrOLLgGui8D3 eEGO6wCi1BzFUQoW7io4hVzDdXhuD0I0eZ87xCfWgoob3YN7aDQLY4RwfXXpYlMj ynr8iUuiIHd8rhIfLIV/A== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :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=fm3; t=1667567921; x= 1667575121; bh=ryNmbFJM4diOGk8okA5Tqnn27dGfir9PKyxk50XOcPc=; b=k ocjtyoBv6Gxm60Vv2ETo2pxrQE6Aj8LnWrNWs5GoUeGj+0GREUMHKWCNWn0Yy0k3 ap+YhXB1RJBQmpRbV3LMu8Ww8iMiRv20ZWzC6QqWa8W4DI97+g+RbqUAKwHV0wRd 0V2EcOkNFtLvkFSTTjvoT7ZuNbaNc/GrXkJ5rzSA0yiq7YRX0RNVs84eI629ujUu Kr4nvY6rCnxA2xiP3GKX0w+XTpfwLCpbfOEVjlcbET2iez0M8JoWgS7h7ilA7EmM Q7+ZL7aAu8uhqU45D1CHMTrz1MxWDyi+yzE/IxWd1kRpLtgriLz+gQKJX2QYdpGQ N5Kf/qsx6/n6jxhtcIS8Q== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvgedrvddugdegkecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhfffugggtgffkfhgjvfevofesthekredtredtjeenucfhrhhomhepofgrgihi mhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrg htthgvrhhnpeduudduhfevjeetfeegvdffvdevvdejudegudekjeehtdelhfffveethfej ledtveenucevlhhushhtvghrufhiiigvpeehnecurfgrrhgrmhepmhgrihhlfhhrohhmpe hmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 4 Nov 2022 09:18:40 -0400 (EDT) From: Maxime Ripard Date: Fri, 04 Nov 2022 14:17:42 +0100 Subject: [PATCH v2 25/65] clk: imx: scu: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v2-25-f6736dec138e@cerno.tech> References: <20221018-clk-range-checks-fixes-v2-0-f6736dec138e@cerno.tech> In-Reply-To: <20221018-clk-range-checks-fixes-v2-0-f6736dec138e@cerno.tech> To: =?unknown-8bit?q?Stephen_Boyd_=3Csboyd=40kernel=2Eorg=3E=2C?= =?unknown-8bit?q?_Maxime_Coquelin_=3Cmcoquelin=2Estm32=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Chen-Yu_Tsai_=3Cwens=40csie=2Eorg=3E=2C_Daniel_Vetter_=3Cd?= =?unknown-8bit?q?aniel=40ffwll=2Ech=3E=2C?= =?unknown-8bit?q?_Nicolas_Ferre_=3Cnicolas=2Eferre=40microchip=2Ecom=3E=2C?= =?unknown-8bit?q?_Thierry_Reding_=3Cthierry=2Ereding=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Jaroslav_Kysela_=3Cperex=40perex=2Ecz=3E=2C_Shawn_Guo_=3Cs?= =?unknown-8bit?q?hawnguo=40kernel=2Eorg=3E=2C?= =?unknown-8bit?q?_Fabio_Estevam_=3Cfestevam=40gmail=2Ecom=3E=2C_Ulf_Hansson_?= =?unknown-8bit?q?=3Culf=2Ehansson=40linaro=2Eorg=3E=2C?= =?unknown-8bit?q?_Claudiu_Beznea_=3Cclaudiu=2Ebeznea=40microchip=2Ecom=3E=2C?= =?unknown-8bit?q?_Michael_Turquette_=3Cmturquette=40baylibre=2Ecom=3E=2C?= =?unknown-8bit?q?_Dinh_Nguyen_=3Cdinguyen=40kernel=2Eorg=3E=2C_Paul_Cercueil?= =?unknown-8bit?q?_=3Cpaul=40crapouillou=2Enet=3E=2C?= =?unknown-8bit?q?_Chunyan_Zhang_=3Czhang=2Elyra=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Manivannan_Sadhasivam_=3Cmani=40kernel=2Eorg=3E=2C?= =?unknown-8bit?b?IEFuZHJlYXMgRsOkcmJlciA8YWZhZXJiZXJAc3VzZS5kZT4s?= =?unknown-8bit?q?_Jonathan_Hunter_=3Cjonathanh=40nvidia=2Ecom=3E=2C_Abel_Ves?= =?unknown-8bit?q?a_=3Cabelvesa=40kernel=2Eorg=3E=2C?= =?unknown-8bit?q?_Charles_Keepax_=3Cckeepax=40opensource=2Ecirrus=2Ecom=3E?= =?unknown-8bit?q?=2C?= =?unknown-8bit?q?_Alessandro_Zummo_=3Ca=2Ezummo=40towertech=2Eit=3E=2C?= =?unknown-8bit?q?_Peter_De_Schrijver_=3Cpdeschrijver=40nvidia=2Ecom=3E=2C?= =?unknown-8bit?q?_Orson_Zhai_=3Corsonzhai=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Alexandre_Torgue_=3Calexandre=2Etorgue=40foss=2Est=2Ecom?= =?unknown-8bit?q?=3E=2C?= =?unknown-8bit?q?_Prashant_Gaikwad_=3Cpgaikwad=40nvidia=2Ecom=3E=2C?= =?unknown-8bit?q?_Liam_Girdwood_=3Clgirdwood=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Alexandre_Belloni_=3Calexandre=2Ebelloni=40bootlin=2Ecom?= =?unknown-8bit?q?=3E=2C?= =?unknown-8bit?q?_Samuel_Holland_=3Csamuel=40sholland=2Eorg=3E=2C?= =?unknown-8bit?q?_Matthias_Brugger_=3Cmatthias=2Ebgg=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Richard_Fitzgerald_=3Crf=40opensource=2Ecirrus=2Ecom=3E=2C?= =?unknown-8bit?q?_Vinod_Koul_=3Cvkoul=40kernel=2Eorg=3E=2C_NXP_Linux_Team_?= =?unknown-8bit?q?=3Clinux-imx=40nxp=2Ecom=3E=2C?= =?unknown-8bit?q?_Sekhar_Nori_=3Cnsekhar=40ti=2Ecom=3E=2C_Kishon_Vijay_Abrah?= =?unknown-8bit?q?am_I_=3Ckishon=40kernel=2Eorg=3E=2C?= =?unknown-8bit?q?_Linus_Walleij_=3Clinus=2Ewalleij=40linaro=2Eorg=3E=2C_Taka?= =?unknown-8bit?q?shi_Iwai_=3Ctiwai=40suse=2Ecom=3E=2C?= =?unknown-8bit?q?_David_Airlie_=3Cairlied=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Luca_Ceresoli_=3Cluca=2Eceresoli=40bootlin=2Ecom=3E=2C?= =?unknown-8bit?q?_Jernej_Skrabec_=3Cjernej=2Eskrabec=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Pengutronix_Kernel_Team_=3Ckernel=40pengutronix=2Ede=3E=2C?= =?unknown-8bit?q?_Baolin_Wang_=3Cbaolin=2Ewang=40linux=2Ealibaba=2Ecom=3E=2C?= =?unknown-8bit?q?_David_Lechner_=3Cdavid=40lechnology=2Ecom=3E=2C?= =?unknown-8bit?q?_Sascha_Hauer_=3Cs=2Ehauer=40pengutronix=2Ede=3E=2C_Mark_Br?= =?unknown-8bit?q?own_=3Cbroonie=40kernel=2Eorg=3E=2C?= =?unknown-8bit?q?_Max_Filippov_=3Cjcmvbkbc=40gmail=2Ecom=3E=2C?= =?unknown-8bit?q?_Geert_Uytterhoeven_=3Cgeert+renesas=40glider=2Ebe=3E?= Cc: linux-stm32@st-md-mailman.stormreply.com, alsa-devel@alsa-project.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, linux-mips@vger.kernel.org, Maxime Ripard , linux-renesas-soc@vger.kernel.org, linux-actions@lists.infradead.org, linux-clk@vger.kernel.org, AngeloGioacchino Del Regno , patches@opensource.cirrus.com, linux-tegra@vger.kernel.org, linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org X-Mailer: b4 0.11.0-dev-99e3a X-Developer-Signature: v=1; a=openpgp-sha256; l=2828; i=maxime@cerno.tech; h=from:subject:message-id; bh=FUptvuI3F63mAIhxBYRO2PMltn/Yw3CvkS3mja0KFvM=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDMmpAl/09/PK679nObU2X/T2a32roICJZXu8t7YaNbvOYtlR JbO0o5SFQYyLQVZMkSVG2HxJ3KlZrzvZ+ObBzGFlAhnCwMUpABMJDmZk6H0T9btj78RNW+6x53x66M 182f3B+fMGBU92zO6TDIrdsZXhf/BJ/XBTpYs/pfR+r/e4ru9ie9mvN3o/O4PAGbkT3R03mAE= X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221104_061842_894965_D66FED50 X-CRM114-Status: GOOD ( 19.92 ) 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 The iMX SCU 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. Signed-off-by: Maxime Ripard --- drivers/clk/imx/clk-scu.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index 1e6870f3671f..66e49fea5f8a 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -785,6 +785,7 @@ static int clk_gpr_mux_scu_set_parent(struct clk_hw *hw, u8 index) } static const struct clk_ops clk_gpr_mux_scu_ops = { + .determine_rate = __clk_mux_determine_rate, .get_parent = clk_gpr_mux_scu_get_parent, .set_parent = clk_gpr_mux_scu_set_parent, }; @@ -836,7 +837,7 @@ struct clk_hw *__imx_clk_gpr_scu(const char *name, const char * const *parent_na struct imx_scu_clk_node *clk_node; struct clk_gpr_scu *clk; struct clk_hw *hw; - struct clk_init_data init; + struct clk_init_data init = {}; int ret; if (rsrc_id >= IMX_SC_R_LAST || gpr_id >= IMX_SC_C_LAST) @@ -868,10 +869,11 @@ struct clk_hw *__imx_clk_gpr_scu(const char *name, const char * const *parent_na if (flags & IMX_SCU_GPR_CLK_DIV) init.ops = &clk_gpr_div_scu_ops; - if (flags & IMX_SCU_GPR_CLK_MUX) + if (flags & IMX_SCU_GPR_CLK_MUX) { init.ops = &clk_gpr_mux_scu_ops; + init.flags |= CLK_SET_RATE_NO_REPARENT; + } - init.flags = 0; init.name = name; init.parent_names = parent_name; init.num_parents = num_parents;