drivers/rtc/rtc-at91rm9200.c: use devm_* APIs

devm_* APIs are device managed and make code simpler.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 21 deletions

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 741892632ae0..8b2cd8a5a2ff 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -376,7 +376,8 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
                 return -ENXIO;
         }
 
-        at91_rtc_regs = ioremap(regs->start, resource_size(regs));
+        at91_rtc_regs = devm_ioremap(&pdev->dev, regs->start,
+                                     resource_size(regs));
         if (!at91_rtc_regs) {
                 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
                 return -ENOMEM;
@@ -390,12 +391,12 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
                                         AT91_RTC_SECEV | AT91_RTC_TIMEV |
                                         AT91_RTC_CALEV);
 
-        ret = request_irq(irq, at91_rtc_interrupt,
+        ret = devm_request_irq(&pdev->dev, irq, at91_rtc_interrupt,
                                 IRQF_SHARED,
                                 "at91_rtc", pdev);
         if (ret) {
                 dev_err(&pdev->dev, "IRQ %d already in use.\n", irq);
-                goto err_unmap;
+                return ret;
         }
 
         /* cpu init code should really have flagged this device as
@@ -404,23 +405,14 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
         if (!device_can_wakeup(&pdev->dev))
                 device_init_wakeup(&pdev->dev, 1);
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                 &at91_rtc_ops, THIS_MODULE);
-        if (IS_ERR(rtc)) {
-                ret = PTR_ERR(rtc);
-                goto err_free_irq;
-        }
+        if (IS_ERR(rtc))
+                return PTR_ERR(rtc);
         platform_set_drvdata(pdev, rtc);
 
         dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");
         return 0;
-
-err_free_irq:
-        free_irq(irq, pdev);
-err_unmap:
-        iounmap(at91_rtc_regs);
-
-        return ret;
 }
 
 /*
@@ -428,16 +420,10 @@ err_unmap:
  */
 static int __exit at91_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
         /* Disable all interrupts */
         at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
                                         AT91_RTC_SECEV | AT91_RTC_TIMEV |
                                         AT91_RTC_CALEV);
-        free_irq(irq, pdev);
-
-        rtc_device_unregister(rtc);
-        iounmap(at91_rtc_regs);
 
         return 0;
 }