From nobody Sun Nov 10 21:31:08 2024 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD053C77B62 for ; Tue, 4 Apr 2023 12:45:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235106AbjDDMpc (ORCPT ); Tue, 4 Apr 2023 08:45:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234661AbjDDMpC (ORCPT ); Tue, 4 Apr 2023 08:45:02 -0400 Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E489E90; Tue, 4 Apr 2023 05:45:01 -0700 (PDT) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id 58386582192; Tue, 4 Apr 2023 08:45:01 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Tue, 04 Apr 2023 08:45:01 -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= 1680612301; x=1680619501; bh=Qc5oVZ9DbLI9MerewUDNIffhIeuagGHpz5D f8tzeNq8=; b=RVk3rYnlzFHHIVyHKmdEC/H1hq85m/LoF4VTX8lDoLjahRZU4kD /u1J7s1TOd2WDeSBkliz12Hj3RYVVEuan9g6Wxr67RLrEfjO3yTGbLvV71HpfyrZ gyKzw9sRGub6IU3F+GUiicSyWJwlKdLvjZkEkB/Vj7aeSfC4udM4wqrIz3UIto1L UkyiQaD+IRQzaRAeyKRMEzL22iA6d7zLALxemvq0M7LIRTICe/m2db4Zj69bYptL XvATG6js0ZVACOpDwC4RDPFHlniXa1tdb7bvA9OUrRVvJRkRx86cY6NqPp+QcPDT +QWY4atXmvzSw1Wa2g9jFRHe7M6i//TPUBA== 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= 1680612301; x=1680619501; bh=Qc5oVZ9DbLI9MerewUDNIffhIeuagGHpz5D f8tzeNq8=; b=kCVHEj5g3H8sSM8QkQsIWa4sP5auCkawDN5CmB9XYuuKQcpGxau QruyduahVcuEdYYEAZShtEmSv45x6pJ9VUs8LU2D046z+ghQ7hDlCDeX3HlIj67m iT3d/PnMaJdw1q+zPoCNnZCfe/HpATPZXenzkQancXwvGPFza7j4R+kUs8CeUC1g S76+MuP88g5IDD7pZHe5C05BvH8XDK/Q4Zd6ow8wIWqhWC+WCTuvghFYSTpYHAYM v8F9Kn02Hl6KRSqIyhsy+iYjlXv+G8ogtQaQdMU6mQ1iG3GTmFBmVx2Llb8vaL4v jhNmuYHg6o50Fk1hF4OzUdXgpd8Lnu2txKA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdeiledgheeiucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephfffufggtgfgkfhfjgfvvefosehtjeertdertdejnecuhfhrohhmpeforgig ihhmvgcutfhiphgrrhguuceomhgrgihimhgvsegtvghrnhhordhtvggthheqnecuggftrf grthhtvghrnhepvedvleeijeegvdekffehkeehieelhfeggfffheetkeeuledvtdeuffeh teeltdffnecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehmrghilhhfrhhomh epmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 4 Apr 2023 08:44:59 -0400 (EDT) From: Maxime Ripard Date: Tue, 04 Apr 2023 12:11:20 +0200 Subject: [PATCH v3 30/65] clk: stm32: core: Add a determine_rate hook MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20221018-clk-range-checks-fixes-v3-30-9a1358472d52@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 Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-actions@lists.infradead.org, patches@opensource.cirrus.com, linux-stm32@st-md-mailman.stormreply.com, linux-mediatek@lists.infradead.org, linux-renesas-soc@vger.kernel.org, linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-phy@lists.infradead.org, linux-rtc@vger.kernel.org, linux-sunxi@lists.linux.dev, alsa-devel@alsa-project.org, linux-mips@vger.kernel.org, Maxime Ripard X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2122; i=maxime@cerno.tech; h=from:subject:message-id; bh=Yck6i64eKHJ3mBHbmM1f5e+l/66UKF/5+Kgv7VOkfmE=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCna37eteFDj5yYhsFr18PO/9+57BgRN+Wq3yubXvqdcfewS sYXXO0pZGMS4GGTFFFlihM2XxJ2a9bqTjW8ezBxWJpAhDFycAjARlueMDKtKumpmREtLGou11jacXs XjLWKowv1yicPz6ZcmvzulFcHIsH2a19SqjqzEMK9gwyd8cq42FxZZ+p4Qn9x748zE+AuuDAA= X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The STM32 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. Since the CLK_SET_RATE_NO_REPARENT flag was already set though, it seems unlikely. Signed-off-by: Maxime Ripard --- drivers/clk/stm32/clk-stm32-core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/stm32/clk-stm32-core.c b/drivers/clk/stm32/clk-stm= 32-core.c index 45a279e73779..3247539683c9 100644 --- a/drivers/clk/stm32/clk-stm32-core.c +++ b/drivers/clk/stm32/clk-stm32-core.c @@ -275,6 +275,7 @@ static int clk_stm32_mux_set_parent(struct clk_hw *hw, = u8 index) } =20 const struct clk_ops clk_stm32_mux_ops =3D { + .determine_rate =3D __clk_mux_determine_rate, .get_parent =3D clk_stm32_mux_get_parent, .set_parent =3D clk_stm32_mux_set_parent, }; --=20 2.39.2