[PATCH v3, 26/27] drm/mediatek: add clock property check before get it

From: <yongqiang.niu@mediatek.com>
To: CK Hu <ck.hu@mediatek.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Rob Herring <robh+dt@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>
Cc: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Mark Rutland <mark.rutland@arm.com>,
	<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 <yongqiang.niu@mediatek.com>
Subject: [PATCH v3, 26/27] drm/mediatek: add clock property check before get it
Date: Wed, 5 Jun 2019 19:43:05 +0800	[thread overview]
Message-ID: <1559734986-7379-27-git-send-email-yongqiang.niu@mediatek.com> (raw)
In-Reply-To: <1559734986-7379-1-git-send-email-yongqiang.niu@mediatek.com>

From: Yongqiang Niu <yongqiang.niu@mediatek.com>

This patch add clock property check before get it

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 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 9986c61..28274d2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
@@ -689,10 +689,12 @@ 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

