From patchwork Fri Nov 4 13:17:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13031953 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 3818AC433FE for ; Fri, 4 Nov 2022 13:33:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9038010E7A0; Fri, 4 Nov 2022 13:33:13 +0000 (UTC) Received: from new1-smtp.messagingengine.com (new1-smtp.messagingengine.com [66.111.4.221]) by gabe.freedesktop.org (Postfix) with ESMTPS id ED22E10E79C for ; Fri, 4 Nov 2022 13:33:08 +0000 (UTC) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailnew.nyi.internal (Postfix) with ESMTP id 598C25803E8; Fri, 4 Nov 2022 09:33:08 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Fri, 04 Nov 2022 09:33:08 -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=1667568788; x= 1667575988; bh=iEX+qgPsoF8AZsDDEpGRO0Wv9ERhTtchVN/nTDUON28=; b=p bh88bViNuCnAY+nmezxhzQpPXqiXrtmZpZiMkvubC9dpF8obJXOSLuuzZhS3rLgG UNoBuG6FtQNH2Pu6u1ZA2P56/SfSgSfBpCxlJA7HoAfJiGGau3vvmYVV4kMiUXQN iDob0KEqR3h87kQ/tH34fQUUIyi3RqBmQHWntR3rUqkW2Y6HrJjd3HrX/GBUeyR5 tKkE5EIIasldJVph9XLiyIzgFtUAeFdMTvR3lkFtqE6Pz9pIQ32BeXKY9WHgsp3S XbWQcaL1a/wkyUEoBDMMsqwDjBhPPXrtlJDddW/sQJwX98B1/9ijpWnJzCxpFntA MB4cBpKxzlUfqe1Y85DjA== 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=1667568788; x= 1667575988; bh=iEX+qgPsoF8AZsDDEpGRO0Wv9ERhTtchVN/nTDUON28=; b=L ewE/QBQgU3MZQAh9A9Cf/STXRR3E7fe10weMiaH73G5oQa9jy0na3YB8a6Se49nk z83FWVW+n4XeT5jhGj9RmFUbicXPcWvHumlRQVEEdVz9s8WpSiPHDdj4kbcuVKVx jogcoXz8wYBonpUghI6rEgF5y4owqrXjLQ8YgWrWjQ5tIKmTutoNNvGR2W/js7uK lbA36m42G0qhhhlxc0sG+GUY+bnZ/9L2dVvfujzxOIhDvZSt5WVaGhmWYYB4Nb6d MKO00/n1xcO7x75QynAov+Eqjuyf57SaNF9/qgMwiBMNlZjCyyEaoHx1VQcRe7mU BhL+gJ1qbk5kiJLgFSZgA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvgedrvddugdehudcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhfffugggtgffkfhgjvfevofesthekredtredtjeenucfhrhhomhepofgrgihi mhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrg htthgvrhhnpeduudduhfevjeetfeegvdffvdevvdejudegudekjeehtdelhfffveethfej ledtveenucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmhepmhgrihhlfhhrohhmpe hmrgigihhmvgestggvrhhnohdrthgvtghh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 4 Nov 2022 09:33:07 -0400 (EDT) From: Maxime Ripard Date: Fri, 04 Nov 2022 14:17:56 +0100 Subject: [PATCH v2 39/65] phy: cadence: torrent: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v2-39-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?= X-Mailer: b4 0.11.0-dev-99e3a X-Developer-Signature: v=1; a=openpgp-sha256; l=2311; i=maxime@cerno.tech; h=from:subject:message-id; bh=1VwDsLraUz0q8iU1PEKJyQs/2PSjnm1eIS8AcyBHtRY=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDMmpAl87c1dxa/EFusWqntjO+z/23rUyKadSo0dx/sfyiiNj 9mzuKGVhEONikBVTZIkRNl8Sd2rW6042vnkwc1iZQIYwcHEKwES6ORgZfr0y2vCOo2Fm4vzsy5On+F ZPVe/3e5C/4+/DO222Qf99lBkZ+rVLg1hZTwrx6u6XKOz+331IVc+4d5rBJdvajwYPL1gwAgA= 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, linux-kernel@vger.kernel.org, patches@opensource.cirrus.com, linux-actions@lists.infradead.org, linux-mips@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-mediatek@lists.infradead.org, Maxime Ripard , linux-phy@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The Cadence Torrent refclk 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. Since the CLK_SET_RATE_NO_REPARENT flag was already set though, it seems unlikely. Signed-off-by: Maxime Ripard --- drivers/phy/cadence/phy-cadence-torrent.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index f099053c583c..be65b05ec41d 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -1861,6 +1861,7 @@ static const struct clk_ops cdns_torrent_refclk_driver_ops = { .enable = cdns_torrent_refclk_driver_enable, .disable = cdns_torrent_refclk_driver_disable, .is_enabled = cdns_torrent_refclk_driver_is_enabled, + .determine_rate = __clk_mux_determine_rate, .set_parent = cdns_torrent_refclk_driver_set_parent, .get_parent = cdns_torrent_refclk_driver_get_parent, };