1 files changed, 29 insertions, 8 deletions

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 9bb3222c95b9..cdfec03bf1a4 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -1081,6 +1081,7 @@ static const struct component_ops sun6i_dsi_ops = {
 static int sun6i_dsi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	const char *bus_clk_name = NULL;
 	struct sun6i_dsi *dsi;
 	struct resource *res;
 	void __iomem *base;
@@ -1094,6 +1095,10 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
 	dsi->host.ops = &sun6i_dsi_host_ops;
 	dsi->host.dev = dev;
 
+	if (of_device_is_compatible(dev->of_node,
+				    "allwinner,sun6i-a31-mipi-dsi"))
+		bus_clk_name = "bus";
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base)) {
@@ -1107,25 +1112,35 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
 		return PTR_ERR(dsi->regulator);
 	}
 
-	dsi->regs = devm_regmap_init_mmio_clk(dev, "bus", base,
-					      &sun6i_dsi_regmap_config);
-	if (IS_ERR(dsi->regs)) {
-		dev_err(dev, "Couldn't create the DSI encoder regmap\n");
-		return PTR_ERR(dsi->regs);
-	}
-
 	dsi->reset = devm_reset_control_get_shared(dev, NULL);
 	if (IS_ERR(dsi->reset)) {
 		dev_err(dev, "Couldn't get our reset line\n");
 		return PTR_ERR(dsi->reset);
 	}
 
+	dsi->regs = devm_regmap_init_mmio(dev, base, &sun6i_dsi_regmap_config);
+	if (IS_ERR(dsi->regs)) {
+		dev_err(dev, "Couldn't init regmap\n");
+		return PTR_ERR(dsi->regs);
+	}
+
+	dsi->bus_clk = devm_clk_get(dev, bus_clk_name);
+	if (IS_ERR(dsi->bus_clk)) {
+		dev_err(dev, "Couldn't get the DSI bus clock\n");
+		return PTR_ERR(dsi->bus_clk);
+	}
+
+	ret = regmap_mmio_attach_clk(dsi->regs, dsi->bus_clk);
+	if (ret)
+		return ret;
+
 	if (of_device_is_compatible(dev->of_node,
 				    "allwinner,sun6i-a31-mipi-dsi")) {
 		dsi->mod_clk = devm_clk_get(dev, "mod");
 		if (IS_ERR(dsi->mod_clk)) {
 			dev_err(dev, "Couldn't get the DSI mod clock\n");
-			return PTR_ERR(dsi->mod_clk);
+			ret = PTR_ERR(dsi->mod_clk);
+			goto err_attach_clk;
 		}
 	}
 
@@ -1164,6 +1179,9 @@ err_pm_disable:
 	pm_runtime_disable(dev);
 err_unprotect_clk:
 	clk_rate_exclusive_put(dsi->mod_clk);
+err_attach_clk:
+	if (!IS_ERR(dsi->bus_clk))
+		regmap_mmio_detach_clk(dsi->regs);
 	return ret;
 }
 
@@ -1177,6 +1195,9 @@ static int sun6i_dsi_remove(struct platform_device *pdev)
 	pm_runtime_disable(dev);
 	clk_rate_exclusive_put(dsi->mod_clk);
 
+	if (!IS_ERR(dsi->bus_clk))
+		regmap_mmio_detach_clk(dsi->regs);
+
 	return 0;
 }