rtc: rtc-coh901331: use devm_ioremap_resource()

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: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 15 deletions

diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index 73f157519dff..869cae273799 100644
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -43,8 +43,6 @@
 struct coh901331_port {
         struct rtc_device *rtc;
         struct clk *clk;
-        u32 phybase;
-        u32 physize;
         void __iomem *virtbase;
         int irq;
 #ifdef CONFIG_PM_SLEEP
@@ -173,19 +171,9 @@ static int __init coh901331_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res)
-                return -ENOENT;
-
-        rtap->phybase = res->start;
-        rtap->physize = resource_size(res);
-
-        if (devm_request_mem_region(&pdev->dev, rtap->phybase, rtap->physize,
-                                    "rtc-coh901331") == NULL)
-                return -EBUSY;
-
-        rtap->virtbase = devm_ioremap(&pdev->dev, rtap->phybase, rtap->physize);
-        if (!rtap->virtbase)
-                return -ENOMEM;
+        rtap->virtbase  = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(rtap->virtbase))
+                return PTR_ERR(rtap->virtbase);
 
         rtap->irq = platform_get_irq(pdev, 0);
         if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0,