On Mon, Aug 03, 2015 at 06:21:17PM +0800, Yong Wu wrote:

+static int mtk_smi_common_get(struct device *smidev)
+{
+	struct mtk_smi_common *smipriv = dev_get_drvdata(smidev);
+	int ret;
+
+	ret = pm_runtime_get_sync(smidev);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_prepare_enable(smipriv->clk_apb);
+	if (ret) {
+		dev_err(smidev, "Failed to enable the apb clock\n");
+		goto err_put_pm;
+	}
+	ret = clk_prepare_enable(smipriv->clk_smi);
+	if (ret) {
+		dev_err(smidev, "Failed to enable the smi clock\n");
+		goto err_disable_apb;
+	}
+	return ret;
+
+err_disable_apb:
+	clk_disable_unprepare(smipriv->clk_apb);
+err_put_pm:
+	pm_runtime_put(smidev);
+	return ret;
+}

[...]

+int mtk_smi_larb_get(struct device *larbdev)
+{
+	struct mtk_smi_larb *larbpriv = dev_get_drvdata(larbdev);
+	struct mtk_larb_mmu *mmucfg = larbdev->archdata.iommu;
+	int ret;
+
+	ret = mtk_smi_common_get(larbpriv->smi);
+	if (ret)
+		return ret;
+
+	ret = pm_runtime_get_sync(larbdev);
+	if (ret < 0)
+		goto err_put_smicommon;
+
+	ret = clk_prepare_enable(larbpriv->clk_apb);
+	if (ret) {
+		dev_err(larbdev, "Failed to enable the apb clock\n");
+		goto err_put_pm;
+	}
+
+	ret = clk_prepare_enable(larbpriv->clk_smi);
+	if (ret) {
+		dev_err(larbdev, "Failed to enable the smi clock\n");
+		goto err_disable_apb;
+	}

The clock enablement looks similar to the function above, maybe move it
to a helper function?


	Joerg