From patchwork Tue Jul 28 13:19:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 6885271 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B15B49F380 for ; Tue, 28 Jul 2015 13:29:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D26C42073E for ; Tue, 28 Jul 2015 13:29:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1E115206D2 for ; Tue, 28 Jul 2015 13:29:38 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZK4ut-0003pc-C3; Tue, 28 Jul 2015 13:27:35 +0000 Received: from mail-wi0-x22b.google.com ([2a00:1450:400c:c05::22b]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZK4oy-00053O-JX for linux-arm-kernel@lists.infradead.org; Tue, 28 Jul 2015 13:21:30 +0000 Received: by wicgb10 with SMTP id gb10so156510428wic.1 for ; Tue, 28 Jul 2015 06:21:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=ebSJMt5uDGQ5pF6dtvCmVZwjc8efU8xUdTKHOBidUeo=; b=HZriMopK25yaDGnHAqFxMdrSzxus2p1t9oa9QJC3TE6MnZI3t4shXOmRvH1AdcY+fd A700RHFGrn0HIvV3f5of55Q18Py/8qqw9dnGi6gyjL1bIpg7WczpqavttsFMLl3VSJAf uxFcyyjnv/Uf0HSbMA9/xhRV2tyiKAB6HAyXnjCx+gSmgpm4/dVfK/eVPX3GkWznTaEL cEpoIN0R1wRafUYEkpA4VWwAOjKn8iVVsR8kQ08CX2v4W41+CkZDwuN82WdkKmcNEbnV e7I8NHGwWM0f/awwO2ZKW43y2+R9h2On3AtbRcawAke/x2mIkP4uU6tAM3A5Ut/vgpl+ TdLg== X-Received: by 10.180.186.34 with SMTP id fh2mr6912096wic.94.1438089666740; Tue, 28 Jul 2015 06:21:06 -0700 (PDT) Received: from cizrna.lan ([109.72.12.179]) by smtp.gmail.com with ESMTPSA id h9sm33265696wjx.20.2015.07.28.06.21.04 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 28 Jul 2015 06:21:05 -0700 (PDT) From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Subject: [PATCH v2 15/22] backlight: Probe backlight devices on demand Date: Tue, 28 Jul 2015 15:19:46 +0200 Message-Id: <1438089593-7696-16-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1438089593-7696-1-git-send-email-tomeu.vizoso@collabora.com> References: <1438089593-7696-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150728_062128_933411_76C3EBFE X-CRM114-Status: GOOD ( 11.31 ) X-Spam-Score: -2.4 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-acpi@vger.kernel.org, Arnd Bergmann , Stephen Warren , Tomi Valkeinen , Linus Walleij , Dmitry Torokhov , "Rafael J. Wysocki" , Tomeu Vizoso , Javier Martinez Canillas , Mark Brown , Thierry Reding , Jingoo Han , Lee Jones , Jean-Christophe Plagniol-Villard , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When looking up a backlight device through its firmware node, probe it if it hasn't already. The goal is to reduce deferred probes to a minimum, as it makes it very cumbersome to find out why a device failed to probe, and can introduce very big delays in when a critical device is probed. Signed-off-by: Tomeu Vizoso --- Changes in v2: None drivers/video/backlight/backlight.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index bddc8b17a4d8..f7151d916435 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -559,6 +559,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node) { struct device *dev; + fwnode_ensure_device(&node->fwnode); + dev = class_find_device(backlight_class, NULL, node, of_parent_match); return dev ? to_backlight_device(dev) : NULL;