From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v4, 25/33] drm/mediatek: add clock property check before get it Date: Tue, 9 Jul 2019 06:34:05 +0800 Message-ID: <1562625253-29254-26-git-send-email-yongqiang.niu@mediatek.com> References: <1562625253-29254-1-git-send-email-yongqiang.niu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1562625253-29254-1-git-send-email-yongqiang.niu@mediatek.com> Sender: linux-kernel-owner@vger.kernel.org To: CK Hu , Philipp Zabel , Rob Herring , Matthias Brugger Cc: David Airlie , Daniel Vetter , Mark Rutland , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Yongqiang Niu List-Id: devicetree@vger.kernel.org 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 c57e7ab..a9d3e27 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c @@ -668,10 +668,12 @@ 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); -- 1.8.1.1.dirty