1 files changed, 10 insertions, 39 deletions

diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c
index 708a25fc9961..372c8c0d54a0 100644
--- a/drivers/w1/masters/mxc_w1.c
+++ b/drivers/w1/masters/mxc_w1.c
@@ -109,34 +109,21 @@ static int mxc_w1_probe(struct platform_device *pdev)
 	struct resource *res;
 	int err = 0;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	mdev = kzalloc(sizeof(struct mxc_w1_device), GFP_KERNEL);
+	mdev = devm_kzalloc(&pdev->dev, sizeof(struct mxc_w1_device),
+			    GFP_KERNEL);
 	if (!mdev)
 		return -ENOMEM;
 
-	mdev->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(mdev->clk)) {
-		err = PTR_ERR(mdev->clk);
-		goto failed_clk;
-	}
+	mdev->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(mdev->clk))
+		return PTR_ERR(mdev->clk);
 
 	mdev->clkdiv = (clk_get_rate(mdev->clk) / 1000000) - 1;
 
-	res = request_mem_region(res->start, resource_size(res),
-				"mxc_w1");
-	if (!res) {
-		err = -EBUSY;
-		goto failed_req;
-	}
-
-	mdev->regs = ioremap(res->start, resource_size(res));
-	if (!mdev->regs) {
-		dev_err(&pdev->dev, "Cannot map mxc_w1 registers\n");
-		goto failed_ioremap;
-	}
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mdev->regs = devm_request_and_ioremap(&pdev->dev, res);
+	if (!mdev->regs)
+		return -EBUSY;
 
 	clk_prepare_enable(mdev->clk);
 	__raw_writeb(mdev->clkdiv, mdev->regs + MXC_W1_TIME_DIVIDER);
@@ -148,20 +135,10 @@ static int mxc_w1_probe(struct platform_device *pdev)
 	err = w1_add_master_device(&mdev->bus_master);
 
 	if (err)
-		goto failed_add;
+		return err;
 
 	platform_set_drvdata(pdev, mdev);
 	return 0;
-
-failed_add:
-	iounmap(mdev->regs);
-failed_ioremap:
-	release_mem_region(res->start, resource_size(res));
-failed_req:
-	clk_put(mdev->clk);
-failed_clk:
-	kfree(mdev);
-	return err;
 }
 
 /*
@@ -170,16 +147,10 @@ failed_clk:
 static int mxc_w1_remove(struct platform_device *pdev)
 {
 	struct mxc_w1_device *mdev = platform_get_drvdata(pdev);
-	struct resource *res;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
 	w1_remove_master_device(&mdev->bus_master);
 
-	iounmap(mdev->regs);
-	release_mem_region(res->start, resource_size(res));
 	clk_disable_unprepare(mdev->clk);
-	clk_put(mdev->clk);
 
 	platform_set_drvdata(pdev, NULL);