From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82E8AC433FE for ; Thu, 2 Sep 2021 23:04:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A5856108E for ; Thu, 2 Sep 2021 23:04:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348536AbhIBXFv (ORCPT ); Thu, 2 Sep 2021 19:05:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348515AbhIBXFu (ORCPT ); Thu, 2 Sep 2021 19:05:50 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5D75C061757 for ; Thu, 2 Sep 2021 16:04:51 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id g192-20020a25dbc9000000b0059bd2958c8aso4592539ybf.5 for ; Thu, 02 Sep 2021 16:04:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=fE4xWbnNUsaH2L2+9e5Jc7xWeW6lJkVzW9cJr5tZCTo=; b=H+Pvky7XU9ApAtzwgpgQVBA1tHgUZtMeP5w3daltJpilyFci7Rzq5wpVDReU38JFzr 4YfB0wERKVKz4KGFlZPTfMGyn+JCX1VswHHkFPf8bN16ODi9e3hY0BevWI5Tz2QcTMug +diSdJBgTG73ywUdQT4hqxzOnYeqhWWaJCdFxLzBXqYuMfowNu4XNAREsttUCS5K58Cd LWpqkJfAwbIIOYOA0dUwhrTTyxy8qdK41/dzkGdKYrSSancrEiR4xCtKW2uNlnnn6C5C CyjniDyeQaxbraSES6WCwQyI9mbjsUeNSaYLyopI1U383UCtHrmM1a18KMJ1dex7LDwT 0NgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=fE4xWbnNUsaH2L2+9e5Jc7xWeW6lJkVzW9cJr5tZCTo=; b=OWN6cIWu1rLevScoJ47E0Ru36OIHHT+XqDXKYXkUPWNdR50xNdRMIXvcZG0e8rntdf 3DIsm5Gh3jxL3d7Y3WHzbj484cXUunPdFw6xlyI9WhxbSwIPOCbyLDdbdkJ8QSxbISlE gdCtlOvgdZFlxgY1KPTVpLYkWj6atdYKRLpYslPxi8RgNSrP2cPp4vRegE6XUuy6qeAJ 04Bdj76ljWe4CQ4fAvga3wqB7lErTbup9DZIsTbUs4ra1Jh7LaTE7FCLTzUwtgXX+CgM VlDdA3P1Vc3H5888OGkB1ggPbCD4k4/nfNIGW/kCoUtFRkM1F5hQiMALevkkFjd7bwvf co8Q== X-Gm-Message-State: AOAM531pZP1lHz4QCpHlYnpQ/LpSe+DWJ9YaH0A+8WlKsFsvavjTMT2+ 8N8YXytxIBbZoLj0vvbbxgnboHUwaU8D/YQ= X-Google-Smtp-Source: ABdhPJxWgcYcIBBK376uC3gnVCUb/S4Lj9Rk7QhgF79UpRu0Ye+Nb1O88qm7IOAAT/bpyFwsdRjCxBFBgy1vRQc= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:7cb7:1ee7:33cb:da76]) (user=saravanak job=sendgmr) by 2002:a25:1bc6:: with SMTP id b189mr1031877ybb.338.1630623890909; Thu, 02 Sep 2021 16:04:50 -0700 (PDT) Date: Thu, 2 Sep 2021 16:04:41 -0700 In-Reply-To: <20210902230442.1515531-1-saravanak@google.com> Message-Id: <20210902230442.1515531-3-saravanak@google.com> Mime-Version: 1.0 References: <20210902230442.1515531-1-saravanak@google.com> X-Mailer: git-send-email 2.33.0.153.gba50c8fa24-goog Subject: [PATCH v2 2/2] drivers: bus: simple-pm-bus: Add support for probing simple bus only devices From: Saravana Kannan To: Rob Herring , Frank Rowand Cc: Saravana Kannan , Ulf Hansson , Geert Uytterhoeven , kernel-team@android.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The OF platform code sets up simple bus only devices (i.e. devices that won't match with any other driver) to get probed by the simple-pm-bus to keep fw_devlink from blocking probe() or sync_state() [1] callbacks of other devices. There's no need to populate the child devices since the OF platform code would do that anyway, so return early for these simple bus only devices. [1] - https://lore.kernel.org/lkml/CAPDyKFo9Bxremkb1dDrr4OcXSpE0keVze94Cm=zrkOVxHHxBmQ@mail.gmail.com/ Signed-off-by: Saravana Kannan Tested-by: Saravana Kannan --- drivers/bus/simple-pm-bus.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c index 01a3d0cd08ed..91d52021b7f9 100644 --- a/drivers/bus/simple-pm-bus.c +++ b/drivers/bus/simple-pm-bus.c @@ -19,6 +19,13 @@ static int simple_pm_bus_probe(struct platform_device *pdev) const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev); struct device_node *np = pdev->dev.of_node; + /* + * These are transparent bus devices (not simple-pm-bus matches) that + * get populated automatically. So, don't need to do anything more. + */ + if (pdev->driver_override) + return 0; + dev_dbg(&pdev->dev, "%s\n", __func__); pm_runtime_enable(&pdev->dev); -- 2.33.0.153.gba50c8fa24-goog