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path: root/drivers/char/hw_random/pasemi-rng.c
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Diffstat (limited to 'drivers/char/hw_random/pasemi-rng.c')
-rw-r--r--drivers/char/hw_random/pasemi-rng.c37
1 files changed, 7 insertions, 30 deletions
diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c
index c19e23d22b36..545df485bcc4 100644
--- a/drivers/char/hw_random/pasemi-rng.c
+++ b/drivers/char/hw_random/pasemi-rng.c
@@ -95,42 +95,20 @@ static struct hwrng pasemi_rng = {
.data_read = pasemi_rng_data_read,
};
-static int rng_probe(struct platform_device *ofdev)
+static int rng_probe(struct platform_device *pdev)
{
void __iomem *rng_regs;
- struct device_node *rng_np = ofdev->dev.of_node;
- struct resource res;
- int err = 0;
+ struct resource *res;
- err = of_address_to_resource(rng_np, 0, &res);
- if (err)
- return -ENODEV;
-
- rng_regs = ioremap(res.start, 0x100);
-
- if (!rng_regs)
- return -ENOMEM;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ rng_regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(rng_regs))
+ return PTR_ERR(rng_regs);
pasemi_rng.priv = (unsigned long)rng_regs;
pr_info("Registering PA Semi RNG\n");
-
- err = hwrng_register(&pasemi_rng);
-
- if (err)
- iounmap(rng_regs);
-
- return err;
-}
-
-static int rng_remove(struct platform_device *dev)
-{
- void __iomem *rng_regs = (void __iomem *)pasemi_rng.priv;
-
- hwrng_unregister(&pasemi_rng);
- iounmap(rng_regs);
-
- return 0;
+ return devm_hwrng_register(&pdev->dev, &pasemi_rng);
}
static const struct of_device_id rng_match[] = {
@@ -146,7 +124,6 @@ static struct platform_driver rng_driver = {
.of_match_table = rng_match,
},
.probe = rng_probe,
- .remove = rng_remove,
};
module_platform_driver(rng_driver);