From patchwork Mon Sep 7 12:23:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 7134871 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6374CBEEC1 for ; Mon, 7 Sep 2015 12:48:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 812B12060B for ; Mon, 7 Sep 2015 12:48:36 +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 A633020680 for ; Mon, 7 Sep 2015 12:48:35 +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 1ZYvof-0003IN-2h; Mon, 07 Sep 2015 12:46:33 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZYvoL-000349-B3 for linux-arm-kernel@bombadil.infradead.org; Mon, 07 Sep 2015 12:46:13 +0000 Received: from mail-wi0-x230.google.com ([2a00:1450:400c:c05::230]) by merlin.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1ZYvTf-00052Y-Qp for linux-arm-kernel@lists.infradead.org; Mon, 07 Sep 2015 12:24:52 +0000 Received: by wicge5 with SMTP id ge5so82215249wic.0 for ; Mon, 07 Sep 2015 05:24:29 -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=9FXZEX0t9UR3LwivwimJlgAfaKviDXV5M01yS+0gTP4=; b=tVUHqTiXuolEf4/9S6qNwfZtZBlgyCCzr7/hYCU8hlsIArSzsbpTvitXpaBSQf0JJe pQ5Pz1X2FLLuXkTvFoK0wZfBCtUp/NX+HCpPW/fGBy1QyPa8WMF6fz3PO+18SK9m0UbO DIZa6k51NYcQr0rplRbn529Bpo7NB/ELM4LdEQMKv6YMjF59RRgaMPCR4M+cyzyQgfVK NzYfQoxVsCiIXOwUSZ7a0La9+LQ0/wLurcgprGeft3FfwjjDG+mZGtF0lxkzUkA4t51K 5f0B8Sv+lU/HEKeTtRpl6cm1ktbc7we55JhvXvpnuU4vJHoWSdnZ8oIb4je1Jgi2L/zM 66ug== X-Received: by 10.180.104.68 with SMTP id gc4mr33573678wib.78.1441628669591; Mon, 07 Sep 2015 05:24:29 -0700 (PDT) Received: from cizrna.lan ([109.72.12.78]) by smtp.gmail.com with ESMTPSA id cm6sm15438wib.22.2015.09.07.05.24.28 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 07 Sep 2015 05:24:28 -0700 (PDT) From: Tomeu Vizoso To: linux-kernel@vger.kernel.org Subject: [PATCH v4 13/22] backlight: Probe backlight devices on demand Date: Mon, 7 Sep 2015 14:23:38 +0200 Message-Id: <1441628627-5143-14-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1441628627-5143-1-git-send-email-tomeu.vizoso@collabora.com> References: <1441628627-5143-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150907_082451_996400_14B5369B X-CRM114-Status: GOOD ( 14.74 ) 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: Tomeu Vizoso , 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" , Rob Herring , 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=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, 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 OF 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 v4: None Changes in v3: None Changes in v2: None drivers/video/backlight/backlight.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index bddc8b17a4d8..9bcdc16eacdf 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -16,6 +16,7 @@ #include #include #include +#include #ifdef CONFIG_PMAC_BACKLIGHT #include @@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node) { struct device *dev; + of_device_probe(node); + dev = class_find_device(backlight_class, NULL, node, of_parent_match); return dev ? to_backlight_device(dev) : NULL;