From patchwork Tue Apr 4 10:11:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 13200041 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 D15F8C77B6C for ; Tue, 4 Apr 2023 13:32:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234284AbjDDNcp (ORCPT ); Tue, 4 Apr 2023 09:32:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234437AbjDDNco (ORCPT ); Tue, 4 Apr 2023 09:32:44 -0400 Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E895030EB; Tue, 4 Apr 2023 06:32:42 -0700 (PDT) Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id 22F96581F6B; Tue, 4 Apr 2023 09:32:42 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Tue, 04 Apr 2023 09:32:42 -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= 1680615162; x=1680622362; bh=vrfzoheDDKqftYvuykRmc8QiWwzudHZE2qX zjDQOLxM=; b=m/DfsQmAQRF+rJw0HonZCfszHHerFFcnDOr2l/WnVous8juq0Vz Xj/GFFoezm/cVfAzLSONhVny5pszKi/Yl/d6+0riAT0jHaf2A4eIa0LrCDKMCSEk vgVeCTDcQFX/bPmy1j2PaxY72prdDJ23WOlqR2wCKICDKQ5JdLyHIyTZFdUDftFk SARFMOB383uJcsBsML39zgqHQRfCGUfL1CE28aEqUHYQydj2fTi5Gtk02ZekzluL Z9cSojtLX9XtEU6M4z54f9zSJwb9YqbUOyRHtvmk/CSbGtTAiY49TKOtlMPIWllt zHQ1wBV7BmEDUMnxwalqwBo9aVrjS47By7g== 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= 1680615162; x=1680622362; bh=vrfzoheDDKqftYvuykRmc8QiWwzudHZE2qX zjDQOLxM=; b=XI81MScU/bNDKOoe0KCzFM0XgUJOz2U3n4N3opocW077rGp3Gyi Jgamyb0BFj3aT7RhazL/FC078PplH5UVPsQgs06b1jfcRxwtUUfwIukQSU9BfIup Lfl1c73o/z77rqt5YzjhBmOUbymF5yoB3FKAh5I2sEqJd7YaAULlDQKBbQmQiYe+ djkVAOz8mRTVKHvb5pbnJRruI9ATAYw3nP/mu6XR3ZCuJPBM6xvcnEVGp3toS6jB nwRa03TgWYxWPn1iqRUSf4t4BQZO4IztbQ9WIJrZ0m8Z3HpnatMA6776Rzp1yMN+ AFDpEyYuJX9d2lfoX9QDjljIuJsFuZIRhNA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdeiledgieehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephfffufggtgfgkfhfjgfvvefosehtjeertdertdejnecuhfhrohhmpeforgig ihhmvgcutfhiphgrrhguuceomhgrgihimhgvsegtvghrnhhordhtvggthheqnecuggftrf grthhtvghrnhepvedvleeijeegvdekffehkeehieelhfeggfffheetkeeuledvtdeuffeh teeltdffnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomh epmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Feedback-ID: i8771445c:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 4 Apr 2023 09:32:38 -0400 (EDT) From: Maxime Ripard Date: Tue, 04 Apr 2023 12:11:29 +0200 Subject: [PATCH v3 39/65] phy: cadence: torrent: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v3-39-9a1358472d52@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=2298; i=maxime@cerno.tech; h=from:subject:message-id; bh=JQSTFMJLoT+23FQjGZTzhN+eYIN/szkjs6l6H5EcB7o=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCna37fFijD5XPuXPTMvqrdfZssl9Qs24adeXfvByhgx69GR GTejOkpZGMS4GGTFFFlihM2XxJ2a9bqTjW8ezBxWJpAhDFycAjCRojhGht35XrmzrA+2t7y6Uv11Xs D7S+FpcTolt9YF+D47rDx1VjnD/wr28PKXOzs6XiSafXoh0XfjUFTBnTMHWuvdv6ZIrj76gwEA X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org 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 3831f596d50c..62e59d1bb9c3 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, };