/* get clocks, power */
 
        res->hdmi = clk_get(dev, "hdmi");
-       if (IS_ERR_OR_NULL(res->hdmi)) {
+       if (IS_ERR(res->hdmi)) {
                dev_err(dev, "failed to get clock 'hdmi'\n");
                goto fail;
        }
        res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
-       if (IS_ERR_OR_NULL(res->sclk_hdmi)) {
+       if (IS_ERR(res->sclk_hdmi)) {
                dev_err(dev, "failed to get clock 'sclk_hdmi'\n");
                goto fail;
        }
        res->sclk_pixel = clk_get(dev, "sclk_pixel");
-       if (IS_ERR_OR_NULL(res->sclk_pixel)) {
+       if (IS_ERR(res->sclk_pixel)) {
                dev_err(dev, "failed to get clock 'sclk_pixel'\n");
                goto fail;
        }
        res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
-       if (IS_ERR_OR_NULL(res->sclk_hdmiphy)) {
+       if (IS_ERR(res->sclk_hdmiphy)) {
                dev_err(dev, "failed to get clock 'sclk_hdmiphy'\n");
                goto fail;
        }
        res->hdmiphy = clk_get(dev, "hdmiphy");
-       if (IS_ERR_OR_NULL(res->hdmiphy)) {
+       if (IS_ERR(res->hdmiphy)) {
                dev_err(dev, "failed to get clock 'hdmiphy'\n");
                goto fail;
        }
 
        struct device *dev = mdev->dev;
 
        res->mixer = clk_get(dev, "mixer");
-       if (IS_ERR_OR_NULL(res->mixer)) {
+       if (IS_ERR(res->mixer)) {
                mxr_err(mdev, "failed to get clock 'mixer'\n");
                goto fail;
        }
        res->vp = clk_get(dev, "vp");
-       if (IS_ERR_OR_NULL(res->vp)) {
+       if (IS_ERR(res->vp)) {
                mxr_err(mdev, "failed to get clock 'vp'\n");
                goto fail;
        }
        res->sclk_mixer = clk_get(dev, "sclk_mixer");
-       if (IS_ERR_OR_NULL(res->sclk_mixer)) {
+       if (IS_ERR(res->sclk_mixer)) {
                mxr_err(mdev, "failed to get clock 'sclk_mixer'\n");
                goto fail;
        }
        res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
-       if (IS_ERR_OR_NULL(res->sclk_hdmi)) {
+       if (IS_ERR(res->sclk_hdmi)) {
                mxr_err(mdev, "failed to get clock 'sclk_hdmi'\n");
                goto fail;
        }
        res->sclk_dac = clk_get(dev, "sclk_dac");
-       if (IS_ERR_OR_NULL(res->sclk_dac)) {
+       if (IS_ERR(res->sclk_dac)) {
                mxr_err(mdev, "failed to get clock 'sclk_dac'\n");
                goto fail;
        }