pwm: Convert pwm-imx to use devm_* APIs

index 900d145..d878c13 100644
@@ -159,18 +159,16 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
 	struct resource *r;
 	int ret = 0;
 
-	imx = kzalloc(sizeof(*imx), GFP_KERNEL);
+	imx = devm_kzalloc(&pdev->dev, sizeof(*imx), GFP_KERNEL);
 	if (imx == NULL) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;
 	}
 
-	imx->clk = clk_get(&pdev->dev, "pwm");
+	imx->clk = devm_clk_get(&pdev->dev, "pwm");
 
-	if (IS_ERR(imx->clk)) {
-		ret = PTR_ERR(imx->clk);
-		goto err_free;
-	}
+	if (IS_ERR(imx->clk))
+		return PTR_ERR(imx->clk);
 
 	imx->chip.ops = &imx_pwm_ops;
 	imx->chip.dev = &pdev->dev;

@@ -182,46 +180,24 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (r == NULL) {
 		dev_err(&pdev->dev, "no memory resource defined\n");
-		ret = -ENODEV;
-		goto err_free_clk;
-	}
-
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "failed to request memory resource\n");
-		ret = -EBUSY;
-		goto err_free_clk;
+		return -ENODEV;
 	}
 
-	imx->mmio_base = ioremap(r->start, resource_size(r));
-	if (imx->mmio_base == NULL) {
-		dev_err(&pdev->dev, "failed to ioremap() registers\n");
-		ret = -ENODEV;
-		goto err_free_mem;
-	}
+	imx->mmio_base = devm_request_and_ioremap(&pdev->dev, r);
+	if (imx->mmio_base == NULL)
+		return -ENODEV;
 
 	ret = pwmchip_add(&imx->chip);
 	if (ret < 0)
-		goto err_iounmap;
+		return ret;
 
 	platform_set_drvdata(pdev, imx);
 	return 0;
-
-err_iounmap:
-	iounmap(imx->mmio_base);
-err_free_mem:
-	release_mem_region(r->start, resource_size(r));
-err_free_clk:
-	clk_put(imx->clk);
-err_free:
-	kfree(imx);
-	return ret;
 }
 
 static int __devexit imx_pwm_remove(struct platform_device *pdev)
 {
 	struct imx_chip *imx;
-	struct resource *r;
 	int ret;
 
 	imx = platform_get_drvdata(pdev);

@@ -229,18 +205,7 @@ static int __devexit imx_pwm_remove(struct platform_device *pdev)
 		return -ENODEV;
 
 	ret = pwmchip_remove(&imx->chip);
-	if (ret)
-		return ret;
-
-	iounmap(imx->mmio_base);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, resource_size(r));
-
-	clk_put(imx->clk);
-
-	kfree(imx);
-	return 0;
+	return ret;
 }
 
 static struct platform_driver imx_pwm_driver = {

index d5c6ce5..1cf0597 100644
@@ -1,5 +1,5 @@
 /*
- * linux/arch/arm/mach-pxa/pwm.c
+ * drivers/pwm/pwm-pxa.c
  *
  * simple driver for PWM (Pulse Width Modulator) controller
  *

@@ -145,17 +145,16 @@ static int __devinit pwm_probe(struct platform_device *pdev)
 	struct resource *r;
 	int ret = 0;
 
-	pwm = kzalloc(sizeof(*pwm), GFP_KERNEL);
+	pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
 	if (pwm == NULL) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;
 	}
 
-	pwm->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(pwm->clk)) {
-		ret = PTR_ERR(pwm->clk);
-		goto err_free;
-	}
+	pwm->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(pwm->clk))
+		return PTR_ERR(pwm->clk);
+
 	pwm->clk_enabled = 0;
 
 	pwm->chip.dev = &pdev->dev;

@@ -166,23 +165,12 @@ static int __devinit pwm_probe(struct platform_device *pdev)
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (r == NULL) {
 		dev_err(&pdev->dev, "no memory resource defined\n");
-		ret = -ENODEV;
-		goto err_free_clk;
-	}
-
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "failed to request memory resource\n");
-		ret = -EBUSY;
-		goto err_free_clk;
+		return -ENODEV;
 	}
 
-	pwm->mmio_base = ioremap(r->start, resource_size(r));
-	if (pwm->mmio_base == NULL) {
-		dev_err(&pdev->dev, "failed to ioremap() registers\n");
-		ret = -ENODEV;
-		goto err_free_mem;
-	}
+	pwm->mmio_base = devm_request_and_ioremap(&pdev->dev, r);
+	if (pwm->mmio_base == NULL)
+		return -ENODEV;
 
 	ret = pwmchip_add(&pwm->chip);
 	if (ret < 0) {

@@ -192,34 +180,17 @@ static int __devinit pwm_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, pwm);
 	return 0;
-
-err_free_mem:
-	release_mem_region(r->start, resource_size(r));
-err_free_clk:
-	clk_put(pwm->clk);
-err_free:
-	kfree(pwm);
-	return ret;
 }
 
 static int __devexit pwm_remove(struct platform_device *pdev)
 {
 	struct pxa_pwm_chip *chip;
-	struct resource *r;
 
 	chip = platform_get_drvdata(pdev);
 	if (chip == NULL)
 		return -ENODEV;
 
 	pwmchip_remove(&chip->chip);
-
-	iounmap(chip->mmio_base);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, resource_size(r));
-
-	clk_put(chip->clk);
-	kfree(chip);
 	return 0;
 }
 

index c40c37e..35fa0e8 100644
@@ -1,4 +1,4 @@
-/* arch/arm/plat-s3c/pwm.c
+/* drivers/pwm/pwm-samsung.c
  *
  * Copyright (c) 2007 Ben Dooks
  * Copyright (c) 2008 Simtec Electronics

@@ -215,7 +215,7 @@ static int s3c_pwm_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
-	s3c = kzalloc(sizeof(*s3c), GFP_KERNEL);
+	s3c = devm_kzalloc(&pdev->dev, sizeof(*s3c), GFP_KERNEL);
 	if (s3c == NULL) {
 		dev_err(dev, "failed to allocate pwm_device\n");
 		return -ENOMEM;

@@ -227,18 +227,16 @@ static int s3c_pwm_probe(struct platform_device *pdev)
 	s3c->chip.base = -1;
 	s3c->chip.npwm = 1;
 
-	s3c->clk = clk_get(dev, "pwm-tin");
+	s3c->clk = devm_clk_get(dev, "pwm-tin");
 	if (IS_ERR(s3c->clk)) {
 		dev_err(dev, "failed to get pwm tin clk\n");
-		ret = PTR_ERR(s3c->clk);
-		goto err_alloc;
+		return PTR_ERR(s3c->clk);
 	}
 
-	s3c->clk_div = clk_get(dev, "pwm-tdiv");
+	s3c->clk_div = devm_clk_get(dev, "pwm-tdiv");
 	if (IS_ERR(s3c->clk_div)) {
 		dev_err(dev, "failed to get pwm tdiv clk\n");
-		ret = PTR_ERR(s3c->clk_div);
-		goto err_clk_tin;
+		return PTR_ERR(s3c->clk_div);
 	}
 
 	clk_enable(s3c->clk);

@@ -272,13 +270,6 @@ static int s3c_pwm_probe(struct platform_device *pdev)
  err_clk_tdiv:
 	clk_disable(s3c->clk_div);
 	clk_disable(s3c->clk);
-	clk_put(s3c->clk_div);
-
- err_clk_tin:
-	clk_put(s3c->clk);
-
- err_alloc:
-	kfree(s3c);
 	return ret;
 }
 

@@ -293,9 +284,6 @@ static int __devexit s3c_pwm_remove(struct platform_device *pdev)
 
 	clk_disable(s3c->clk_div);
 	clk_disable(s3c->clk);
-	clk_put(s3c->clk_div);
-	clk_put(s3c->clk);
-	kfree(s3c);
 
 	return 0;
 }

index 3db0746..92f7475 100644
@@ -1,5 +1,5 @@
 /*
- * arch/arm/mach-vt8500/pwm.c
+ * drivers/pwm/pwm-vt8500.c
  *
  *  Copyright (C) 2010 Alexey Charkov <[email protected]>
  *

@@ -113,7 +113,7 @@ static int __devinit pwm_probe(struct platform_device *pdev)
 	struct resource *r;
 	int ret;
 
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
 	if (chip == NULL) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;

@@ -127,44 +127,24 @@ static int __devinit pwm_probe(struct platform_device *pdev)
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (r == NULL) {
 		dev_err(&pdev->dev, "no memory resource defined\n");
-		ret = -ENODEV;
-		goto err_free;
-	}
-
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "failed to request memory resource\n");
-		ret = -EBUSY;
-		goto err_free;
+		return -ENODEV;
 	}
 
-	chip->base = ioremap(r->start, resource_size(r));
-	if (chip->base == NULL) {
-		dev_err(&pdev->dev, "failed to ioremap() registers\n");
-		ret = -ENODEV;
-		goto err_free_mem;
-	}
+	chip->base = devm_request_and_ioremap(&pdev->dev, r);
+	if (chip->base == NULL)
+		return -ENODEV;
 
 	ret = pwmchip_add(&chip->chip);
 	if (ret < 0)
-		goto err_unmap;
+		return ret;
 
 	platform_set_drvdata(pdev, chip);
 	return ret;
-
-err_unmap:
-	iounmap(chip->base);
-err_free_mem:
-	release_mem_region(r->start, resource_size(r));
-err_free:
-	kfree(chip);
-	return ret;
 }
 
 static int __devexit pwm_remove(struct platform_device *pdev)
 {
 	struct vt8500_chip *chip;
-	struct resource *r;
 	int err;
 
 	chip = platform_get_drvdata(pdev);

@@ -172,16 +152,7 @@ static int __devexit pwm_remove(struct platform_device *pdev)
 		return -ENODEV;
 
 	err = pwmchip_remove(&chip->chip);
-	if (err < 0)
-		return err;
-
-	iounmap(chip->base);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, resource_size(r));
-
-	kfree(chip);
-	return 0;
+	return err;
 }
 
 static struct platform_driver pwm_driver = {