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hwrng: atmel - Use devm_ioremap_resource()

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Use devm_ioremap_resource() in order to make the code simpler,
and remove redundant return value check of platform_get_resource()
because the value is checked by devm_ioremap_resource().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jingoo Han 2014-02-12 14:17:08 +09:00 committed by Herbert Xu
parent 0fdefe2c90
commit bfaff75b09
1 changed files with 4 additions and 11 deletions
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15
drivers/char/hw_random/atmel-rng.c
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@ -54,21 +54,14 @@ static int atmel_trng_probe(struct platform_device *pdev)
struct resource *res;
int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EINVAL;
trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
if (!trng)
return -ENOMEM;
if (!devm_request_mem_region(&pdev->dev, res->start,
resource_size(res), pdev->name))
return -EBUSY;
trng->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!trng->base)
return -EBUSY;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
trng->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(trng->base))
return PTR_ERR(trng->base);
trng->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(trng->clk))