From nobody Wed Apr 15 18:12:22 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 6DBDCC4332F for ; Thu, 17 Nov 2022 11:02:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239499AbiKQLCe (ORCPT ); Thu, 17 Nov 2022 06:02:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239742AbiKQLB1 (ORCPT ); Thu, 17 Nov 2022 06:01:27 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 166AEDD9 for ; Thu, 17 Nov 2022 02:59:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1668682766; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=NHqZVSUZPL4fN7KKyUIajXaGhTjFsMLtpxufRffoPO0=; b=aR+d7/lRGlTbVD4c+0G670OGH6P18nE9zakR1G0atcq9pwIZdRSDc09iOlqzSTgTKl3m0v 0qDTZznSJgPxGRwC4aG3hW6lvcHPu3dJrujeIvRtlKwsC8XlN84MSmoAkoqC7f8HDOBtym LLwIB50f472AGIe0dsUqloLgokxp24o= Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-657-Dm1S-QSBOXmhIZtfBKefOQ-1; Thu, 17 Nov 2022 05:59:25 -0500 X-MC-Unique: Dm1S-QSBOXmhIZtfBKefOQ-1 Received: by mail-qv1-f71.google.com with SMTP id lb11-20020a056214318b00b004c63b9f91e5so1270621qvb.8 for ; Thu, 17 Nov 2022 02:59:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=NHqZVSUZPL4fN7KKyUIajXaGhTjFsMLtpxufRffoPO0=; b=yhfw5NOLuCRVYG2YTNQAyEzHOF4Ix8GiNIYwlxlifrWmwSJcmzINcIOoMTsPR18tfx 80xEzGQfD725KlNNQ3uyTn9GvXZvI2sk7Gqb58OGyl2OcS1SzvGCqr5Q6xqj9Tsvou51 b+0l6a6pL1DzeFT1nXOPLeyoNPFbXb1CuUHQhtPn3IcpFEzTlqS+TdEL83d+/LqaCmHv E5Z9f7mNcQNZBlhlk7r809Oj8QFB9fx5CBHniUB3J6ydBHfmVNmWmP+DwjjfsKhowFLv CJiOsMKDUkBQ8H8z+c8P8uCT/z1TIW7dC5i2pzkFMwD3mYbNfv8bw+jI75AwfwaRL3Sz b02g== X-Gm-Message-State: ANoB5pmH6yeRt5VbcYMZFvr/u6wRHFHksP1UrR1Rf1fpjghBWzxUXqd8 8kmB9YTNC06FcQ3fzza7oWc/I31aTsYgvSI+c2k19J8APB32G5bo96CAfxrgiz7QmKU8Kr3JMkW oYpnO2C7+zB66KFnlYj5ysQIR X-Received: by 2002:a05:622a:1c1b:b0:39c:d5cd:848e with SMTP id bq27-20020a05622a1c1b00b0039cd5cd848emr1598588qtb.294.1668682765185; Thu, 17 Nov 2022 02:59:25 -0800 (PST) X-Google-Smtp-Source: AA0mqf4tEcsbNaCntauYyT3prVUMPVvxQYyD+D9GBgxd8uTGR7ZKequMv/3F6KVAscjxQWvnFW7ULw== X-Received: by 2002:a05:622a:1c1b:b0:39c:d5cd:848e with SMTP id bq27-20020a05622a1c1b00b0039cd5cd848emr1598583qtb.294.1668682764977; Thu, 17 Nov 2022 02:59:24 -0800 (PST) Received: from x1.redhat.com (c-73-214-169-22.hsd1.pa.comcast.net. [73.214.169.22]) by smtp.gmail.com with ESMTPSA id d7-20020ac86147000000b003a5c60686b0sm202843qtm.22.2022.11.17.02.59.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Nov 2022 02:59:24 -0800 (PST) From: Brian Masney To: sboyd@kernel.org, mturquette@baylibre.com Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] clk: add debug message showing which unused clocks are disabled on boot Date: Thu, 17 Nov 2022 05:58:29 -0500 Message-Id: <20221117105829.256717-1-bmasney@redhat.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The clk framework on bootup will automatically disable all unused clocks on bootup unless the clk_ignore_unused kernel parameter is present. Let's add a basic debugging log statement here that shows which clocks are disabled. There is already tracepoint present here as well, but there's nothing like a simple, good ol' fashioned printk for simplicity. Signed-off-by: Brian Masney --- drivers/clk/clk.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 57b83665e5c3..ddf5a48e72b6 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1352,6 +1352,7 @@ static void __init clk_disable_unused_subtree(struct = clk_core *core) * back to .disable */ if (clk_core_is_enabled(core)) { + dev_dbg(core->dev, "Powering off unused clock %s\n", core->name); trace_clk_disable(core); if (core->ops->disable_unused) core->ops->disable_unused(core->hw); --=20 2.38.1