Hi, Yongqiang: On Wed, 2019-06-05 at 19:43 +0800, yongqiang.niu@xxxxxxxxxxxx wrote: > From: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> > > This patch add clock property check before get it In the binding document [1], clock is required property. In this patch, you change it to optional property. I think you should change the binding document and describe _WHY_ do you do this. [1] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Cdisp.txt Regards, CK > > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx> > --- > 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);
