pwm: Convert pwm-vt8500 to use devm_* APIs

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

1 files changed, 8 insertions, 39 deletions

diff --git a/drivers/pwm/pwm-vt8500.c b/drivers/pwm/pwm-vt8500.c
index 3db0746f7200..548021439f0c 100644
--- a/drivers/pwm/pwm-vt8500.c
+++ b/drivers/pwm/pwm-vt8500.c
@@ -1,5 +1,5 @@
 /*
- * arch/arm/mach-vt8500/pwm.c
+ * drivers/pwm/pwm-vt8500.c
  *
  *  Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
  *
@@ -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;
@@ -127,61 +127,30 @@ 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;
+                return -ENODEV;
         }
 
-        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;
-        }
-
-        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 -EADDRNOTAVAIL;
 
         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);
         if (chip == NULL)
                 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 pwmchip_remove(&chip->chip);
 }
 
 static struct platform_driver pwm_driver = {