From patchwork Tue Apr 4 10:11:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 670800 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 6B9D2C76188 for ; Wed, 5 Apr 2023 07:26:16 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 6408DE7C; Wed, 5 Apr 2023 09:25:24 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 6408DE7C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1680679574; bh=CVkVploTBmGsGDh1pgQkRdhTnIRCmgkdPTUL6cHj8pk=; h=From:Date:Subject:References:In-Reply-To:To:CC:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=XPqbVmeNO2Pf5wyEXLJu4gHuKyvIMj0nlPDKaE8l+RspjPIdeMavPyUCmkOpBlHhy HzxYZ3CICcC3BE8boQTgDuKL2uRP1d6KGu+PFwISXyk2zqgdlAgLiZqauiigKAU+Ax Ae5ZZo4j+RsCibbGFQy7GR4lnnZX6LRA40kkC2vo= Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 13FAFF80578; Wed, 5 Apr 2023 09:20:52 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 197E4F8024C; Tue, 4 Apr 2023 14:45:14 +0200 (CEST) Received: from new3-smtp.messagingengine.com (new3-smtp.messagingengine.com [66.111.4.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id D0260F8015B for ; Tue, 4 Apr 2023 14:45:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz D0260F8015B Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=cerno.tech header.i=@cerno.tech header.a=rsa-sha256 header.s=fm3 header.b=T33QA58T; dkim=pass (2048-bit key, unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm2 header.b=FYf+6Kwt Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id F35B7582196; Tue, 4 Apr 2023 08:45:10 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute2.internal (MEProxy); Tue, 04 Apr 2023 08:45:11 -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= 1680612310; x=1680619510; bh=V8F7vdZqNHhl5nv8/Rp3qNs+CuQC/1S5n3N A9KKJTlA=; b=T33QA58TsY7L/qwKXqHoJY3rCCwL7EP6KK6tkE9cdvlHnPABYSe pXpRMRtjRPUv8t7IXqaHdyujZQGXfuY4pOB9WxT8my7eIABkZ6mg9uy8XEkmZxJO wv1mZAs+N8BKgoStAbRxhkRbXmKquQFq06QOel3Ch3+ftzwDyo8D5UjIU4CMcl9d J85KHRZUEB1y4OrVaocXDBFJAw3Ay5ijMEkxn8baUADKTXx/SX99hDGNKvh5hpM/ iQWcXh3u2VlvRx0XuHoz9x2IyOrPhpadmlk3PAvPpOjakZ39kW1zcYgksOx1Z57s s/BixV2wnyyYmuI6vuuOn69U52unvOOeIzw== 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= 1680612310; x=1680619510; bh=V8F7vdZqNHhl5nv8/Rp3qNs+CuQC/1S5n3N A9KKJTlA=; b=FYf+6KwtjH9qVK5Z73qwmZAH4ypY7EuXWjPIo1pCVCY1KSx3QW6 pxU++QozVrpFTDipdFOHXyyQnq0xuLQ2CG5jyu8NQu74e8We7PCzccdqxiuYWPOF fs8/b70817p2eDek5EsSh6PQTQ0JIkfIIzg36hScwK4TrPiXgiQq31V3rIvHuxbg 9o0CiJuPHs/mcZcb1LDVw8y33LpjQFuB1aJ4rHWLMR5iuasI7KjzXKAQCU7VJ0dy aTkSx4EqyP8KfJtszgOUj0msGKw7Qt+hX1mV7TnA9AMwvYLJdN/2az24Hpl/lnXy BiszlfmGgwk2ZhNM77GZEBjS2/GYkobfCBg== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdeiledgheehucetufdoteggodetrfdotf 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 08:45:09 -0400 (EDT) From: Maxime Ripard Date: Tue, 04 Apr 2023 12:11:23 +0200 Subject: [PATCH v3 33/65] clk: tegra: periph: Add a determine_rate hook MIME-Version: 1.0 Message-Id: <20221018-clk-range-checks-fixes-v3-33-9a1358472d52@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=2509; i=maxime@cerno.tech; h=from:subject:message-id; bh=CVkVploTBmGsGDh1pgQkRdhTnIRCmgkdPTUL6cHj8pk=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDCna37e9izlhYt3DnT9rm3BnR1Xgnvq3K3/OOOCo88M9ZOHO 6cJsHaUsDGJcDLJiiiwxwuZL4k7Net3JxjcPZg4rE8gQBi5OAZiIJxsjw8+dV8/9SFrb+OHbE+Wa2l evFv3XC3k/N3bRJLV/vc1eRqIM/+tqpl/U3NSULVmx9/if9efKDrzzZdBm89t9XvnEW1OdJF4A X-Developer-Key: i=maxime@cerno.tech; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-MailFrom: maxime@cerno.tech X-Mailman-Rule-Hits: max-recipients X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-size; news-moderation; no-subject; digests; suspicious-header Message-ID-Hash: CVM4UKVQDWZSBBHNIGNQDGPZAF6PLW2N X-Message-ID-Hash: CVM4UKVQDWZSBBHNIGNQDGPZAF6PLW2N X-Mailman-Approved-At: Wed, 05 Apr 2023 07:18:22 +0000 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-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: The Tegra periph nodiv 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/tegra/clk-periph.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clk/tegra/clk-periph.c b/drivers/clk/tegra/clk-periph.c index 79ca3aa072b7..367396c62259 100644 --- a/drivers/clk/tegra/clk-periph.c +++ b/drivers/clk/tegra/clk-periph.c @@ -140,6 +140,7 @@ const struct clk_ops tegra_clk_periph_ops = { }; static const struct clk_ops tegra_clk_periph_nodiv_ops = { + .determine_rate = __clk_mux_determine_rate, .get_parent = clk_periph_get_parent, .set_parent = clk_periph_set_parent, .is_enabled = clk_periph_is_enabled, @@ -170,7 +171,7 @@ static struct clk *_tegra_clk_register_periph(const char *name, bool div = !(periph->gate.flags & TEGRA_PERIPH_NO_DIV); if (periph->gate.flags & TEGRA_PERIPH_NO_DIV) { - flags |= CLK_SET_RATE_PARENT; + flags |= CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT; init.ops = &tegra_clk_periph_nodiv_ops; } else if (periph->gate.flags & TEGRA_PERIPH_NO_GATE) init.ops = &tegra_clk_periph_no_gate_ops;