From patchwork Sun Sep 17 22:40:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Bara X-Patchwork-Id: 13388736 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 7E0D0CD13D1 for ; Sun, 17 Sep 2023 22:41:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239126AbjIQWlA (ORCPT ); Sun, 17 Sep 2023 18:41:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234732AbjIQWkl (ORCPT ); Sun, 17 Sep 2023 18:40:41 -0400 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5119412C; Sun, 17 Sep 2023 15:40:36 -0700 (PDT) Received: by mail-wm1-x336.google.com with SMTP id 5b1f17b1804b1-402c46c49f4so42429945e9.1; Sun, 17 Sep 2023 15:40:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1694990435; x=1695595235; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=6vxGwRmrE/ZkUF8q8weoGWwIj4Xu+tdZLwyIukopjBs=; b=BkNdvDP2hLNDwlr1CAMI/gfvY0qEXyu1ak+Q7zjfYCZ+UJ9jnlqKpnqonYngWhAGuL EzjcsISPsK9a4L0oE6kneUNx1/bCmkMsjL17UuZqqHAp3drULOy38j6OvZHE5VvgoynT RhDdrwNTknlDaBsuN094DKCSn0GOnCO2dF9/Z1hpA1fD2PSnzr8kSpTHLlNygr8mlKQj vAFeWoHWOTZAkDLCqlpNllpAaJJjHeJgPCS3yoNKqpfUPpbicdw3qn821H1aOD9TdpFs a1CY6gtFybeSuagYEpm8k+v2tNIgaOglwDHXxGVOZO3RVO2/lUc455zNmdB6zhcHIpnX zUog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694990435; x=1695595235; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6vxGwRmrE/ZkUF8q8weoGWwIj4Xu+tdZLwyIukopjBs=; b=tx064o2+RKXy0Lk+4KCvP7sDvjJKMzDkg1IcfpNane9O4VxwyoV6kNq9ygJ0fRjWtq cgVKrNQjaHZtnCiqC+O2VbSFWv2+u4HRG+7Uvtf3h+UFr/hutIhFQmHJge4ZfYE9OwTw QPIF1uJ4ufY7jT0jibbVk3xU0lrC50B9bMwGIVKsycP0tUKa4R9Fd5rD47FzYBCs9gRi LIijYlKUE+rzZPnfywVeA/74s37sKKMnLQ3TjTCnyZ+73Z3RDElgpnJsQ4M07cIGHQPV BxTAW2k1+qHwSy/yFWuZgjyHPmAuIR9ckMr1vP32uHRpB3R8bwhNHqREmKwBpXbTYZLs hcnw== X-Gm-Message-State: AOJu0Yxt6WGYWkDCaRODm2C+pF0zmtIDLL7n0xzLjJsYbjREY0WBdJwX c2s4K3SZfeGspYhb0oW1uxY= X-Google-Smtp-Source: AGHT+IHMevfnk5UWYsKRhfkr5ayQmI3SajW1IKiqEwfVzf1dzHkT1BsOxFv0AQd3YBAb6HwM5sliDw== X-Received: by 2002:a05:600c:2194:b0:3fe:ef11:d79f with SMTP id e20-20020a05600c219400b003feef11d79fmr6719962wme.36.1694990434661; Sun, 17 Sep 2023 15:40:34 -0700 (PDT) Received: from [127.0.1.1] ([91.230.2.244]) by smtp.gmail.com with ESMTPSA id x14-20020a1c7c0e000000b003fe2b081661sm13642931wmc.30.2023.09.17.15.40.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Sep 2023 15:40:34 -0700 (PDT) From: Benjamin Bara Date: Mon, 18 Sep 2023 00:40:00 +0200 Subject: [PATCH 04/13] clk: print debug message if parent change is ignored MIME-Version: 1.0 Message-Id: <20230918-imx8mp-dtsi-v1-4-1d008b3237c0@skidata.com> References: <20230918-imx8mp-dtsi-v1-0-1d008b3237c0@skidata.com> In-Reply-To: <20230918-imx8mp-dtsi-v1-0-1d008b3237c0@skidata.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Michael Turquette , Stephen Boyd , Russell King , Abel Vesa , Peng Fan Cc: Frank Oltmanns , Maxime Ripard , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Benjamin Bara X-Mailer: b4 0.12.3 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Benjamin Bara Print a debug message if the determination of the best clock rate suggests a re-config of the parent (which means the actual driver considers doing so), but the clock is not configured with CLK_SET_PARENT_RATE. This should give a good hint for clock config improvement potential. Signed-off-by: Benjamin Bara --- drivers/clk/clk.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 3e222802b712..4954d31899ce 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -2241,9 +2241,14 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core, } } - if ((core->flags & CLK_SET_RATE_PARENT) && parent && - best_parent_rate != parent->rate) - top = clk_calc_new_rates(parent, best_parent_rate); + if (parent && best_parent_rate != parent->rate) { + if (core->flags & CLK_SET_RATE_PARENT) + top = clk_calc_new_rates(parent, best_parent_rate); + else + pr_debug("%s: ignore parent %s re-config from %lu to %lu\n", + core->name, parent->name, parent->rate, + best_parent_rate); + } out: clk_calc_subtree(core, new_rate, parent, p_index);