From patchwork Mon May 25 14:53:19 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomeu Vizoso X-Patchwork-Id: 6475531 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 8CC7F9F1CC for ; Mon, 25 May 2015 15:13:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C3C1E20268 for ; Mon, 25 May 2015 15:13:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EFAB12012E for ; Mon, 25 May 2015 15:13:32 +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 1Ywu1S-00073f-TH; Mon, 25 May 2015 15:10:35 +0000 Received: from mail-wi0-x22c.google.com ([2a00:1450:400c:c05::22c]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Ywtq6-0004de-6M for linux-arm-kernel@lists.infradead.org; Mon, 25 May 2015 14:58:54 +0000 Received: by wizk4 with SMTP id k4so50652451wiz.1 for ; Mon, 25 May 2015 07:58:31 -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=m7Cjuj9JjHIR8AlRO/4jUW9tWdvc1DhonaQ4HNurIEQ=; b=ZK4OtSF6c4J5dbZeKK92L3JdvAEma7BWYrh1BWAX0Sbbaqk34o4BIYjiSjGy3NUfEn FZ+18ilh/cGLZqA9vR0ievPLMhLU8zHZuKAbt8+BZmzRyLEGZhqK1GH5uBXBgNwXbvVL 4v2mbWGugAh9LfOxfZX0vUyWviN6vJi8X7T4yRtFc3dc9fbJgissz2gF1F5yoB5p3mPO cft5ItL2lLG9bJrC9epsSY8DDYT/ffG6zzPLoeUWp5AYQ07QCo3hHapKq5DrsbCYTFvO Wc9xiu7r4xQfYWlfVaz52kTxSmaCsglKFjUe7h5Q4k9IH4IDtDmwPa1SoeDXlXBpT4Gk XchA== X-Received: by 10.194.123.4 with SMTP id lw4mr973669wjb.94.1432565911738; Mon, 25 May 2015 07:58:31 -0700 (PDT) Received: from cizrna.lan ([109.72.12.80]) by mx.google.com with ESMTPSA id ez19sm12258917wid.19.2015.05.25.07.58.29 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 May 2015 07:58:30 -0700 (PDT) From: Tomeu Vizoso To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 15/21] backlight: Probe backlight devices on demand Date: Mon, 25 May 2015 16:53:19 +0200 Message-Id: <1432565608-26036-16-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 2.4.1 In-Reply-To: <1432565608-26036-1-git-send-email-tomeu.vizoso@collabora.com> References: <1432565608-26036-1-git-send-email-tomeu.vizoso@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150525_075850_441060_0DFB3661 X-CRM114-Status: UNSURE ( 9.00 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: Mark Rutland , Jean-Christophe Plagniol-Villard , linux-fbdev@vger.kernel.org, Tomeu Vizoso , Jingoo Han , Tomi Valkeinen , Dmitry Torokhov , linux-kernel@vger.kernel.org, Rob Herring , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , Thierry Reding , Grant Likely , Alexander Holler , Lee Jones X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 DT node, ensure that the corresponding device has been registered. Signed-off-by: Tomeu Vizoso --- 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 bddc8b1..fe7833b 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -559,6 +560,8 @@ struct backlight_device *of_find_backlight_by_node(struct device_node *node) { struct device *dev; + of_platform_device_ensure(node); + dev = class_find_device(backlight_class, NULL, node, of_parent_match); return dev ? to_backlight_device(dev) : NULL;