hwrng: bcm2835 - Obtain base register via resource

In preparation for consolidating bcm63xx-rng into bcm2835-rng, make sure
that we obtain the base register via platform_get_resource() since we
need to support the non-DT enabled MIPS-based BCM63xx DSL SoCs.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
index 574211a..a818418 100644 (file)
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -81,21 +81,23 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
        void (*rng_setup)(void __iomem *base);
        const struct of_device_id *rng_id;
        void __iomem *rng_base;
+       struct resource *r;
        int err;
 
+       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
        /* map peripheral */
-       rng_base = of_iomap(np, 0);
-       if (!rng_base) {
+       rng_base = devm_ioremap_resource(dev, r);
+       if (IS_ERR(rng_base)) {
                dev_err(dev, "failed to remap rng regs");
-               return -ENODEV;
+               return PTR_ERR(rng_base);
        }
        bcm2835_rng_ops.priv = (unsigned long)rng_base;
 
        rng_id = of_match_node(bcm2835_rng_of_match, np);
-       if (!rng_id) {
-               iounmap(rng_base);
+       if (!rng_id)
                return -EINVAL;
-       }
+
        /* Check for rng init function, execute it */
        rng_setup = rng_id->data;
        if (rng_setup)
@@ -107,10 +109,9 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
 
        /* register driver */
        err = hwrng_register(&bcm2835_rng_ops);
-       if (err) {
+       if (err)
                dev_err(dev, "hwrng registration failed\n");
-               iounmap(rng_base);
-       } else
+       else
                dev_info(dev, "hwrng registered\n");
 
        return err;
@@ -125,7 +126,6 @@ static int bcm2835_rng_remove(struct platform_device *pdev)
 
        /* unregister driver */
        hwrng_unregister(&bcm2835_rng_ops);
-       iounmap(rng_base);
 
        return 0;
 }