From patchwork Thu Aug 29 14:50:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongqiang Niu X-Patchwork-Id: 11123347 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 609A4112C for ; Fri, 30 Aug 2019 08:31:39 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 46F9E23405 for ; Fri, 30 Aug 2019 08:31:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 46F9E23405 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1380C6E2CE; Fri, 30 Aug 2019 08:31:18 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by gabe.freedesktop.org (Postfix) with ESMTP id D59736E14A for ; Thu, 29 Aug 2019 14:51:26 +0000 (UTC) X-UUID: af7fc895d35d4de1ab388861087ae6ff-20190829 X-UUID: af7fc895d35d4de1ab388861087ae6ff-20190829 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1297632701; Thu, 29 Aug 2019 22:51:23 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 29 Aug 2019 22:51:29 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 29 Aug 2019 22:51:28 +0800 From: To: CK Hu , Philipp Zabel , Rob Herring , Matthias Brugger Subject: [PATCH v5, 24/32] drm/mediatek: add clock property check before get it Date: Thu, 29 Aug 2019 22:50:46 +0800 Message-ID: <1567090254-15566-25-git-send-email-yongqiang.niu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1567090254-15566-1-git-send-email-yongqiang.niu@mediatek.com> References: <1567090254-15566-1-git-send-email-yongqiang.niu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-Mailman-Approved-At: Fri, 30 Aug 2019 08:29:17 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Yongqiang Niu , David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Yongqiang Niu This patch add clock property check before get it Signed-off-by: Yongqiang Niu --- drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c index a5a6689..effc24a 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c @@ -657,10 +657,12 @@ static int mtk_ddp_probe(struct platform_device *pdev) for (i = 0; i < 10; i++) ddp->mutex[i].id = i; - ddp->clk = devm_clk_get(dev, NULL); - if (IS_ERR(ddp->clk)) { - dev_err(dev, "Failed to get clock\n"); - return PTR_ERR(ddp->clk); + if (of_find_property(dev->of_node, "clocks", &i)) { + ddp->clk = devm_clk_get(dev, NULL); + if (IS_ERR(ddp->clk)) { + dev_err(dev, "Failed to get clock\n"); + return PTR_ERR(ddp->clk); + } } regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);