diff options
Diffstat (limited to 'drivers/char/hw_random/pasemi-rng.c')
| -rw-r--r-- | drivers/char/hw_random/pasemi-rng.c | 39 |
1 files changed, 8 insertions, 31 deletions
diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c index 699b7259f5d7..545df485bcc4 100644 --- a/drivers/char/hw_random/pasemi-rng.c +++ b/drivers/char/hw_random/pasemi-rng.c @@ -26,7 +26,7 @@ #include <linux/delay.h> #include <linux/of_address.h> #include <linux/of_platform.h> -#include <asm/io.h> +#include <linux/io.h> #define SDCRNG_CTL_REG 0x00 #define SDCRNG_CTL_FVLD_M 0x0000f000 @@ -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); |