From nobody Sun Apr 12 00:54:37 2026 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 0AEA3C00140 for ; Tue, 2 Aug 2022 18:11:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231796AbiHBSLo (ORCPT ); Tue, 2 Aug 2022 14:11:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237793AbiHBSLE (ORCPT ); Tue, 2 Aug 2022 14:11:04 -0400 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B98117E13; Tue, 2 Aug 2022 11:11:00 -0700 (PDT) Received: by mail-pg1-x52f.google.com with SMTP id 23so13012873pgc.8; Tue, 02 Aug 2022 11:11:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=VSuThS25A1SmF3lUm9zKQZW1zZmHE3Wa8nzE8cQc3xY=; b=MOST/R+9Pu82byZZKWzHAXHowM9RJkX/xUI4J81mR9yItGRirdWszF98BMKIxPBMMc eFq/ID+KIn3x/BMcVPOq7Bi6XBg5OQUaHTKQSeADQsTn6iOtLRyvId6U1uDfwomtA5VZ LTZH4P6s2gF4tLv4cWTa4PIDcuBkZngU3nUhgPvEwijLrDJnvgODE4I+eXddkoYr+NDr YWjGTVn9AQV62O92oy4+KJLOmMYiUAVXVWkeBdR9jJyDgbNfe9Kj6ycgRhXB1t2+YFE8 FXXZi/GbneyhW1+4dplOoTGje3/dxMHcX5zm37yB1aLLe6C9uhdij9B4Ym+FUGaGfSEO sjvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=VSuThS25A1SmF3lUm9zKQZW1zZmHE3Wa8nzE8cQc3xY=; b=SYRQrTzij38LJm5CQ5gcoMeOPqMh4pr8QNimQUjx/Je/dxDPBuV7UgueaKaYuJ/RzD ExqSXsL/h3ZJSgXliGHSISwl/o875NkVQDaCXUEOzQce5ItX+haChgjPpzVa4CKk1Cqz YUEYyCoFsneXgpehZwmfI3LfQgFT4ljBKKjb8/m49oJv6CqHobFSSfibALiXO8TWimAK fBuHEzkI9NS/LxpikLyzL5UlnTwBmjFZlwhRiy7LUGVprTRYwvFYysWnumD5nLlbSOmb JmfsJZShQVYoVq8XWpIkAye5KDgMFkHZIdWRVewk3yuFyId/LeQt+5oDW3lnrWnH3Zxr C8SA== X-Gm-Message-State: AJIora/m6mP3uUCBR4OiP2LyQy+JPaIzuV9v326Zmcj9ZbT8g9yGNetW BqG4oapVFewCI2Rv8BMQGdWj9ql4EuE= X-Google-Smtp-Source: AGRyM1vyvI1vzvid8Bo8G+oWfNYRN17arAZ2ebp+U+Q4l6i2IbT8kUgZTGt/txgwEVoiTexo6aTxmA== X-Received: by 2002:a05:6a00:1a44:b0:52a:ecd5:bbef with SMTP id h4-20020a056a001a4400b0052aecd5bbefmr21566896pfv.28.1659463859515; Tue, 02 Aug 2022 11:10:59 -0700 (PDT) Received: from localhost.localdomain ([2401:4900:1cc5:2406:5d81:6fe8:af08:c752]) by smtp.googlemail.com with ESMTPSA id z22-20020aa79496000000b0052d8d7269d7sm4420525pfk.53.2022.08.02.11.10.56 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Aug 2022 11:10:59 -0700 (PDT) From: Vishal Badole To: sboyd@kernel.org Cc: mturquette@baylibre.com, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, chinmoyghosh2001@gmail.com, vimal.kumar32@gmail.com, Vishal Badole , Mintu Patel Subject: [PATCH v3] Common clock: To list active consumers of clocks Date: Tue, 2 Aug 2022 23:39:47 +0530 Message-Id: <1659463787-25976-1-git-send-email-badolevishal1116@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <20220624010550.582BBC341C7@smtp.kernel.org> References: <20220624010550.582BBC341C7@smtp.kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This feature lists the clock consumer's name and per-user enable count in clock summary. Using this feature user can easily check which device has acquired a perticular clock and it is enabled by respective device or not. for example: $ cat /sys/kernel/debug/clk/clk_summary enable prepare protect du= ty hardware per-user clock count count count rate accuracy phase cyc= le enable consumer count ---------------------------------------------------------------------------= ------------------------------------------------- clk_mcasp0_fixed 0 0 0 24576000 0 0 500= 00 Y deviceless 0 = deviceless 0 clk_mcasp0 0 0 0 24576000 0 0 500= 00 N simple-audio-card,cpu 0 = deviceless 0 Co-developed-by: Chinmoy Ghosh Signed-off-by: Chinmoy Ghosh Co-developed-by: Mintu Patel Signed-off-by: Mintu Patel Co-developed-by: Vimal Kumar Signed-off-by: Vimal Kumar Signed-off-by: Vishal Badole --- drivers/clk/clk.c | 46 +++++++++++++++++++++++++++++++++++----------- 1 file changed, 35 insertions(+), 11 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index f00d4c1..c96079f 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -102,6 +102,7 @@ struct clk { unsigned long min_rate; unsigned long max_rate; unsigned int exclusive_count; + unsigned int enable_count; struct hlist_node clks_node; }; =20 @@ -1008,6 +1009,10 @@ void clk_disable(struct clk *clk) return; =20 clk_core_disable_lock(clk->core); + + if (clk->enable_count > 0) + clk->enable_count--; + } EXPORT_SYMBOL_GPL(clk_disable); =20 @@ -1169,10 +1174,16 @@ EXPORT_SYMBOL_GPL(clk_restore_context); */ int clk_enable(struct clk *clk) { + int ret; + if (!clk) return 0; =20 - return clk_core_enable_lock(clk->core); + ret =3D clk_core_enable_lock(clk->core); + if (!ret) + clk->enable_count++; + + return ret; } EXPORT_SYMBOL_GPL(clk_enable); =20 @@ -2953,28 +2964,41 @@ static void clk_summary_show_one(struct seq_file *s= , struct clk_core *c, int level) { int phase; + struct clk *clk_user; + int multi_node =3D 0; =20 - seq_printf(s, "%*s%-*s %7d %8d %8d %11lu %10lu ", + seq_printf(s, "%*s%-*s %-7d %-8d %-8d %-11lu %-10lu ", level * 3 + 1, "", - 30 - level * 3, c->name, + 35 - level * 3, c->name, c->enable_count, c->prepare_count, c->protect_count, clk_core_get_rate_recalc(c), clk_core_get_accuracy_recalc(c)); =20 phase =3D clk_core_get_phase(c); if (phase >=3D 0) - seq_printf(s, "%5d", phase); + seq_printf(s, "%-5d", phase); else seq_puts(s, "-----"); =20 - seq_printf(s, " %6d", clk_core_get_scaled_duty_cycle(c, 100000)); + seq_printf(s, " %-6d", clk_core_get_scaled_duty_cycle(c, 100000)); =20 if (c->ops->is_enabled) - seq_printf(s, " %9c\n", clk_core_is_enabled(c) ? 'Y' : 'N'); + seq_printf(s, " %5c ", clk_core_is_enabled(c) ? 'Y' : 'N'); else if (!c->ops->enable) - seq_printf(s, " %9c\n", 'Y'); + seq_printf(s, " %5c ", 'Y'); else - seq_printf(s, " %9c\n", '?'); + seq_printf(s, " %5c ", '?'); + + hlist_for_each_entry(clk_user, &c->clks, clks_node) { + seq_printf(s, "%*s%-*s %-4d\n", + level * 3 + 2 + 105 * multi_node, "", + 30, + clk_user->dev_id ? clk_user->dev_id : "deviceless", + clk_user->enable_count); + + multi_node =3D 1; + } + } =20 static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *= c, @@ -2995,9 +3019,9 @@ static int clk_summary_show(struct seq_file *s, void = *data) struct clk_core *c; struct hlist_head **lists =3D (struct hlist_head **)s->private; =20 - seq_puts(s, " enable prepare protect = duty hardware\n"); - seq_puts(s, " clock count count count = rate accuracy phase cycle enable\n"); - seq_puts(s, "------------------------------------------------------------= -------------------------------------------\n"); + seq_puts(s, " enable prepare protect = duty hardware per-= user\n"); + seq_puts(s, " clock count count count = rate accuracy phase cycle enable consumer c= ount\n"); + seq_puts(s, "------------------------------------------------------------= ---------------------------------------------------------------------------= ----\n"); =20 clk_prepare_lock(); =20 --=20 2.7.4