rtc: rtc-at91sam9: use devm_*() functions

Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: 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, 12 insertions, 22 deletions

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 39cfd2ee0042..7b77c27e0955 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -20,6 +20,7 @@
 #include <linux/ioctl.h>
 #include <linux/slab.h>
 #include <linux/platform_data/atmel.h>
+#include <linux/io.h>
 
 #include <mach/at91_rtt.h>
 #include <mach/cpu.h>
@@ -309,7 +310,7 @@ static int at91_rtc_probe(struct platform_device *pdev)
                 return irq;
         }
 
-        rtc = kzalloc(sizeof *rtc, GFP_KERNEL);
+        rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
         if (!rtc)
                 return -ENOMEM;
 
@@ -320,18 +321,19 @@ static int at91_rtc_probe(struct platform_device *pdev)
                 device_init_wakeup(&pdev->dev, 1);
 
         platform_set_drvdata(pdev, rtc);
-        rtc->rtt = ioremap(r->start, resource_size(r));
+        rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
         if (!rtc->rtt) {
                 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
                 ret = -ENOMEM;
                 goto fail;
         }
 
-        rtc->gpbr = ioremap(r_gpbr->start, resource_size(r_gpbr));
+        rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
+                                resource_size(r_gpbr));
         if (!rtc->gpbr) {
                 dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
                 ret = -ENOMEM;
-                goto fail_gpbr;
+                goto fail;
         }
 
         mr = rtt_readl(rtc, MR);
@@ -346,20 +348,19 @@ static int at91_rtc_probe(struct platform_device *pdev)
         mr &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
         rtt_writel(rtc, MR, mr);
 
-        rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
-                                &at91_rtc_ops, THIS_MODULE);
+        rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,
+                                        &at91_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtcdev)) {
                 ret = PTR_ERR(rtc->rtcdev);
-                goto fail_register;
+                goto fail;
         }
 
         /* register irq handler after we know what name we'll use */
-        ret = request_irq(rtc->irq, at91_rtc_interrupt, IRQF_SHARED,
-                                dev_name(&rtc->rtcdev->dev), rtc);
+        ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,
+                                IRQF_SHARED, dev_name(&rtc->rtcdev->dev), rtc);
         if (ret) {
                 dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);
-                rtc_device_unregister(rtc->rtcdev);
-                goto fail_register;
+                goto fail;
         }
 
         /* NOTE:  sam9260 rev A silicon has a ROM bug which resets the
@@ -374,13 +375,8 @@ static int at91_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-fail_register:
-        iounmap(rtc->gpbr);
-fail_gpbr:
-        iounmap(rtc->rtt);
 fail:
         platform_set_drvdata(pdev, NULL);
-        kfree(rtc);
         return ret;
 }
 
@@ -394,14 +390,8 @@ static int at91_rtc_remove(struct platform_device *pdev)
 
         /* disable all interrupts */
         rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
-        free_irq(rtc->irq, rtc);
-
-        rtc_device_unregister(rtc->rtcdev);
 
-        iounmap(rtc->gpbr);
-        iounmap(rtc->rtt);
         platform_set_drvdata(pdev, NULL);
-        kfree(rtc);
         return 0;
 }