From patchwork Tue Apr 4 10:11:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13199787 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 1217FC761A6 for ; Tue, 4 Apr 2023 12:34:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D7A510E27D; Tue, 4 Apr 2023 12:34:40 +0000 (UTC) Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0627910E283 for ; Tue, 4 Apr 2023 12:34:37 +0000 (UTC) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id 560E75821A9; Tue, 4 Apr 2023 08:34:36 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Tue, 04 Apr 2023 08:34:36 -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= 1680611676; x=1680618876; bh=xnvYmnPey5i3ywxRPKhBs4vnyecoxNr52oM JsnNmWlY=; b=mcEwSJoCiUrmTnO4nuPEWww//PGWjeD66ZciIHSzyw8KODLRWTL Zef6s8oCxToytqGox2cb3/1qyrbOuqpAf31gp2NNug95uHr5vt5tNabjpRa+Ujal iWVLu8ykd3KUOg3Hghy7MZv8QmrLW10cBxKu5jhPVTQJGrZuViWGi1vH0PwosVnQ BKhN1lEdrxKx6PnsqCGnF4tuQQ/bSDsabE4XSKxf4oFlU+H5GEva05ULoViktvcb bSVPyNHAVmsQwXRLMIrRoY2wLrjsuhEmV2D8Z65IAoUVayehzGd4hGC9AfRTwoSx uvhXFOxdWcwkuBq0L6zpPUpgb73HJXkskQQ== 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= 1680611676; x=1680618876; bh=xnvYmnPey5i3ywxRPKhBs4vnyecoxNr52oM JsnNmWlY=; b=GLH7g2xSOzIARV524/JRymqL3yeigufHjs2p6v5c2g/jRMN6NKl 9YddMsbb9bEYHZXw9jI1Du6E8uNAxCz4knddK6uFjjqPE4ijthmwYlqF+e1Bg9Et RZHDfrLHfArAKp3OlYIy0LEx49ee64rUmNsYWgsRMPRxbFmc2IsTsJJuxvYrMKUZ 8NosmZRqNdtMfHOer1dogmnpf8SYwFKA9+WCKQnmWFPKhFbG2Bp2/eI1aRPD0cvf Pz7BPhJuhfhuje9ouu52wH37WvaVGA9VLBWkqMv+ls7YfI9XZ51eqeGCceMijy6F GV/ZD9Hrvn70JcxZJwQYVpr2Ls64k0ZBnNA== 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 08:34:34 -0400 (EDT) From: Maxime Ripard Date: Tue, 04 Apr 2023 12:11:12 +0200 Subject: [PATCH v3 22/65] clk: davinci: da8xx-cfgchip: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v3-22-9a1358472d52@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=2322; i=maxime@cerno.tech; h=from:subject:message-id; bh=zqg97H0Ji53100uwLykPTJ08YBbIyy0+pb37UlAbn8M=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCna37cWP+yQC33iKhi06/IHYxM2J5PtL0qLA2Z5KWyMqP0h eOVYRykLgxgXg6yYIkuMsPmSuFOzXney8c2DmcPKBDKEgYtTACbCocbwV36lc0jt4+41fckhNxV2W8 /hvp1hU3bF7Kxbsv2z/MXqjxkZ1nz/cMvxTnPstf0nhW8n6CTqRNl+nyN/rO1eaUKD9ZJ+VgA= 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 "clk48" 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/davinci/da8xx-cfgchip.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/davinci/da8xx-cfgchip.c b/drivers/clk/davinci/da8xx-cfgchip.c index c04276bc4051..4c1cc59bba53 100644 --- a/drivers/clk/davinci/da8xx-cfgchip.c +++ b/drivers/clk/davinci/da8xx-cfgchip.c @@ -565,6 +565,7 @@ static u8 da8xx_usb1_clk48_get_parent(struct clk_hw *hw) } static const struct clk_ops da8xx_usb1_clk48_ops = { + .determine_rate = __clk_mux_determine_rate, .set_parent = da8xx_usb1_clk48_set_parent, .get_parent = da8xx_usb1_clk48_get_parent, }; @@ -589,6 +590,7 @@ da8xx_cfgchip_register_usb1_clk48(struct device *dev, init.name = "usb1_clk48"; init.ops = &da8xx_usb1_clk48_ops; + init.flags = CLK_SET_RATE_NO_REPARENT; init.parent_names = parent_names; init.num_parents = 2;