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path: root/drivers/char/hw_random/mxc-rnga.c
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Diffstat (limited to 'drivers/char/hw_random/mxc-rnga.c')
-rw-r--r--drivers/char/hw_random/mxc-rnga.c21
1 files changed, 4 insertions, 17 deletions
diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c
index 895d0b8fb9a..4ca35e8a5d8 100644
--- a/drivers/char/hw_random/mxc-rnga.c
+++ b/drivers/char/hw_random/mxc-rnga.c
@@ -142,7 +142,7 @@ static void mxc_rnga_cleanup(struct hwrng *rng)
static int __init mxc_rnga_probe(struct platform_device *pdev)
{
int err = -ENODEV;
- struct resource *res, *mem;
+ struct resource *res;
struct mxc_rng *mxc_rng;
mxc_rng = devm_kzalloc(&pdev->dev, sizeof(struct mxc_rng),
@@ -172,15 +172,9 @@ static int __init mxc_rnga_probe(struct platform_device *pdev)
goto err_region;
}
- mem = request_mem_region(res->start, resource_size(res), pdev->name);
- if (mem == NULL) {
- err = -EBUSY;
- goto err_region;
- }
-
- mxc_rng->mem = ioremap(res->start, resource_size(res));
- if (!mxc_rng->mem) {
- err = -ENOMEM;
+ mxc_rng->mem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mxc_rng->mem)) {
+ err = PTR_ERR(mxc_rng->mem);
goto err_ioremap;
}
@@ -195,8 +189,6 @@ static int __init mxc_rnga_probe(struct platform_device *pdev)
return 0;
err_ioremap:
- release_mem_region(res->start, resource_size(res));
-
err_region:
clk_disable_unprepare(mxc_rng->clk);
@@ -206,15 +198,10 @@ out:
static int __exit mxc_rnga_remove(struct platform_device *pdev)
{
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct mxc_rng *mxc_rng = platform_get_drvdata(pdev);
hwrng_unregister(&mxc_rng->rng);
- iounmap(mxc_rng->mem);
-
- release_mem_region(res->start, resource_size(res));
-
clk_disable_unprepare(mxc_rng->clk);
return 0;