From patchwork Sun Dec 25 16:47:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 36498 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp579109wrt; Sun, 25 Dec 2022 08:48:23 -0800 (PST) X-Google-Smtp-Source: AMrXdXt9Zz59DOl2VDNskVtsUXbjClcY8beaNp1LXaqFjxkHakYoG+hj7Py4eqO81vbojMqMQ0qu X-Received: by 2002:a17:907:2061:b0:7c0:dfbd:5a1a with SMTP id qp1-20020a170907206100b007c0dfbd5a1amr14263600ejb.33.1671986903194; Sun, 25 Dec 2022 08:48:23 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1671986903; cv=none; d=google.com; s=arc-20160816; b=S9xBNiaWOXONAttSqUhi2pbxq98WiWl+hYD6dwJ69IBHYudjC5oscu7oJhbDa/RKnd 38iba76BL0+z/VnAVy2rE/eDRaefd/C7RiPAktyyb99P078KcoW0OLXAD0dRyg+MdA4M r+QkX3kZqLgCGkardXnNYJ7+mmr/WBowfzjY9zxDpdnVAGXApQYtbXYNQ/fwHpqdXpGg nYosKx1L6ij+ws3yyIZMm8T0UrYk8Iu6efM+UvZ66h5+MdRbWNKJTL2TTFKCxaMtu2FX frztcN002OsPwAXKfsctQDQhM25VZGY8QKrmr5Wu3gegGeq8plpHBupweoma19bPq/Ze liOQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=bJSRHwGgSQsIgnd1ziT5DVB7secN8//21s4cglbkjsI=; b=vLiiSlc1DUL++1jlc3bcuyBL9MGydF8p75QLmKe8XiA3Xh2INA6bOn4vDn/45kuDq1 K1CS1AYS3AcOxn327DM/XW6yBrdt98sTRT9In5NDigdmMKXesaASTs/dO50rm+O396fV Nc9I4A8ymeKPxPBgc+rSBwDZp50FG6IR2LJx6LO35M2oKC7Ej2kjaiogVH0dew90Rie+ WdTIUJcUZht4bfkjNTssqkDM8l+ciA4OJ4UuUjfHNIEpj0qxavof7MXitB3XRFxsa46O sKSv5aduC2/FJCNieYtzSwhxpWRDoYyPFFycV8cwxPC83NquR0FLcxKHOv5pTvZDWgr2 PmzA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=OwYNmML6; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id sd22-20020a1709076e1600b007c17efb64fcsi6889967ejc.639.2022.12.25.08.47.58; Sun, 25 Dec 2022 08:48:23 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=OwYNmML6; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231341AbiLYQrS (ORCPT + 99 others); Sun, 25 Dec 2022 11:47:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229749AbiLYQrO (ORCPT ); Sun, 25 Dec 2022 11:47:14 -0500 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 1507F10ED for ; Sun, 25 Dec 2022 08:47:12 -0800 (PST) Received: by mail-wm1-x336.google.com with SMTP id l26so4930160wme.5 for ; Sun, 25 Dec 2022 08:47:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=bJSRHwGgSQsIgnd1ziT5DVB7secN8//21s4cglbkjsI=; b=OwYNmML6Qi1WxRgnDi95+Q6UGEOFHsX0RzzURE1yyZ1VPvRebZxXn1yOAMERCq23cV Qvd/8FPjAtm5qkvNlgpzPewQSsUVbBQYiiKu9/bBmYUYYjFPPhGXwciXRqpTaCXppOjg P0ekRQWHncfmm+WVyTA8fOU4LanckORvwC57AbsBjkC0h5vq7XeULjmx5csbCPZlrBF8 RDjFVz9H4k66mru2ZWUXlNE52wuRuyviaI6vEVaswdhV2TZQhoJZFuRlsWbEur+M/K2a WEaLlP/wmsHd3mje0gHE9Zb7lN2L/zh7ZgC730yudztHp0zR/EwQKJp+ZimIFXvA+RpX FDUA== 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=bJSRHwGgSQsIgnd1ziT5DVB7secN8//21s4cglbkjsI=; b=Nd6CDcCPa0CoTRUW1IYgxs/F8HK6YNc0mtDfnzb4mU8//I4MsWyncFG+HopWtLsbYH mGolBbCbjPEeW9IRAjSRQQQf/SIGThUYY/18pRaEVsqDZnJ1AqHoNEmzt1o//G0H6Pkp mIQviwoz1JMd+ZqTWuYRVm1Vh53RSzcMfNVXJy4PQpkQfyTFGCW5PvyGX2u3HiJuPxdD /b2LSlDxH7C7TUMkNmi0arwS3ZBgEMsVy8gYvLEMu4tyP4QWVqZTqDKNsFMTiQo4PHra RJTZvzJYXIDPYDvw+/4YHgBLFDH632v6L498EIebRRQ0iAVf3LwusGqsX4H8t3dXOjra MKkQ== X-Gm-Message-State: AFqh2kpr3V13eNPTN8D1T1Z6w/xFLgc9eydj56yZULt6cZuhiBqkUTqd E6XlQzAtHaKIXIABQNSVNCrZRw== X-Received: by 2002:a05:600c:21c1:b0:3d3:45c6:b641 with SMTP id x1-20020a05600c21c100b003d345c6b641mr11547895wmj.22.1671986830532; Sun, 25 Dec 2022 08:47:10 -0800 (PST) Received: from hackbox.lan ([94.52.112.99]) by smtp.gmail.com with ESMTPSA id d9-20020a05600c3ac900b003d973d4fb28sm5507545wms.4.2022.12.25.08.47.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Dec 2022 08:47:10 -0800 (PST) From: Abel Vesa To: Mike Turquette , Stephen Boyd , Andy Gross , Bjorn Andersson , Konrad Dybcio Cc: linux-clk@vger.kernel.org, Linux Kernel Mailing List , linux-arm-msm@vger.kernel.org Subject: [PATCH v2 1/2] clk: Add generic sync_state callback for disabling unused clocks Date: Sun, 25 Dec 2022 18:47:04 +0200 Message-Id: <20221225164705.437944-1-abel.vesa@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1753205338967256313?= X-GMAIL-MSGID: =?utf-8?q?1753205338967256313?= There are unused clocks that need to remain untouched by clk_disable_unused, and most likely could be disabled later on sync_state. So provide a generic sync_state callback for the clock providers that register such clocks. Then, use the same mechanism as clk_disable_unused from that generic callback, but pass the device to make sure only the clocks belonging to the current clock provider get disabled, if unused. Also, during the default clk_disable_unused, if the driver that registered the clock has the generic clk_sync_state_disable_unused callback set for sync_state, skip disabling its clocks. Signed-off-by: Abel Vesa --- Changes since v1: * Dropped the 0 returned by __clk_disable_unused when clk_ignore_unused is set. * Dropped __initdata for clk_ignore_unused drivers/clk/clk.c | 59 +++++++++++++++++++++++++++++------- include/linux/clk-provider.h | 1 + 2 files changed, 49 insertions(+), 11 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index e62552a75f08..5185b857fc65 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1302,14 +1302,27 @@ static void clk_core_disable_unprepare(struct clk_core *core) clk_core_unprepare_lock(core); } -static void __init clk_unprepare_unused_subtree(struct clk_core *core) +static void clk_unprepare_unused_subtree(struct clk_core *core, + struct device *dev) { + bool from_sync_state = !!dev; struct clk_core *child; lockdep_assert_held(&prepare_lock); hlist_for_each_entry(child, &core->children, child_node) - clk_unprepare_unused_subtree(child); + clk_unprepare_unused_subtree(child, dev); + + if (from_sync_state && core->dev != dev) + return; + + /* + * clock will be unprepared on sync_state, + * so leave as is for now + */ + if (!from_sync_state && dev_has_sync_state(core->dev) && + core->dev->driver->sync_state == clk_sync_state_disable_unused) + return; if (core->prepare_count) return; @@ -1332,15 +1345,28 @@ static void __init clk_unprepare_unused_subtree(struct clk_core *core) clk_pm_runtime_put(core); } -static void __init clk_disable_unused_subtree(struct clk_core *core) +static void clk_disable_unused_subtree(struct clk_core *core, + struct device *dev) { + bool from_sync_state = !!dev; struct clk_core *child; unsigned long flags; lockdep_assert_held(&prepare_lock); hlist_for_each_entry(child, &core->children, child_node) - clk_disable_unused_subtree(child); + clk_disable_unused_subtree(child, dev); + + if (from_sync_state && core->dev != dev) + return; + + /* + * clock will be disabled on sync_state, + * so leave as is for now + */ + if (!from_sync_state && + core->dev->driver->sync_state == clk_sync_state_disable_unused) + return; if (core->flags & CLK_OPS_PARENT_ENABLE) clk_core_prepare_enable(core->parent); @@ -1378,7 +1404,7 @@ static void __init clk_disable_unused_subtree(struct clk_core *core) clk_core_disable_unprepare(core->parent); } -static bool clk_ignore_unused __initdata; +static bool clk_ignore_unused; static int __init clk_ignore_unused_setup(char *__unused) { clk_ignore_unused = true; @@ -1386,35 +1412,46 @@ static int __init clk_ignore_unused_setup(char *__unused) } __setup("clk_ignore_unused", clk_ignore_unused_setup); -static int __init clk_disable_unused(void) +static void __clk_disable_unused(struct device *dev) { struct clk_core *core; if (clk_ignore_unused) { pr_warn("clk: Not disabling unused clocks\n"); - return 0; + return; } clk_prepare_lock(); hlist_for_each_entry(core, &clk_root_list, child_node) - clk_disable_unused_subtree(core); + clk_disable_unused_subtree(core, dev); hlist_for_each_entry(core, &clk_orphan_list, child_node) - clk_disable_unused_subtree(core); + clk_disable_unused_subtree(core, dev); hlist_for_each_entry(core, &clk_root_list, child_node) - clk_unprepare_unused_subtree(core); + clk_unprepare_unused_subtree(core, dev); hlist_for_each_entry(core, &clk_orphan_list, child_node) - clk_unprepare_unused_subtree(core); + clk_unprepare_unused_subtree(core, dev); clk_prepare_unlock(); +} + +static int __init clk_disable_unused(void) +{ + __clk_disable_unused(NULL); return 0; } late_initcall_sync(clk_disable_unused); +void clk_sync_state_disable_unused(struct device *dev) +{ + __clk_disable_unused(dev); +} +EXPORT_SYMBOL_GPL(clk_sync_state_disable_unused); + static int clk_core_determine_round_nolock(struct clk_core *core, struct clk_rate_request *req) { diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 842e72a5348f..cf1adfeaf257 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -720,6 +720,7 @@ struct clk *clk_register_divider_table(struct device *dev, const char *name, void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags, const struct clk_div_table *table, spinlock_t *lock); +void clk_sync_state_disable_unused(struct device *dev); /** * clk_register_divider - register a divider clock with the clock framework * @dev: device registering this clock