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SubjectRe: [PATCH] hwrng: pasemi_rng.c: Migrate to managed API
On Thu, Aug 25, 2016 at 05:04:16PM +0530, PrasannaKumar Muralidharan wrote:
> Use devm_ioremap and devm_hwrng_register instead of ioremap and
> hwrng_register. This removes unregistering and error handling code.
>
> This patch is not tested with hardware as I don't have access to it.
>
> Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
> ---
> drivers/char/hw_random/pasemi-rng.c | 26 +++-----------------------
> 1 file changed, 3 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c
> index 699b725..0f03397 100644
> --- a/drivers/char/hw_random/pasemi-rng.c
> +++ b/drivers/char/hw_random/pasemi-rng.c
> @@ -100,37 +100,18 @@ static int rng_probe(struct platform_device *ofdev)
> void __iomem *rng_regs;
> struct device_node *rng_np = ofdev->dev.of_node;
> struct resource res;
> - int err = 0;
>
> - err = of_address_to_resource(rng_np, 0, &res);
> - if (err)
> + if (of_address_to_resource(rng_np, 0, &res))
> return -ENODEV;
>
> - rng_regs = ioremap(res.start, 0x100);
> -
> + rng_regs = devm_ioremap(&ofdev->dev, res.start, 0x100);
> if (!rng_regs)
> return -ENOMEM;
>

I will propose to use devm_ioremap_resource() instead for removing this hardcoded 0x100, but i cannot find any user of this driver in any dts. (And so cannot check that this 0x100 is given in any DT resource node)

Is this normal ?

Regard

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