drivers/rtc/rtc-omap.c: update to devm_* API

Update the code to use devm_* API so that driver core will manage
resources.

Signed-off-by: Vishwanathrao Badarkhe, Manish <manishv.b@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 172cc5ca7489da0fcc9b60f7884cbe7977c3b2ea..a1f9d30e162b29a6c608b0d121ff1b1fb5296208 100644 (file)
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -324,7 +324,7 @@ MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
 
 static int __init omap_rtc_probe(struct platform_device *pdev)
 {
-       struct resource         *res, *mem;
+       struct resource         *res;
        struct rtc_device       *rtc;
        u8                      reg, new_ctrl;
        const struct platform_device_id *id_entry;
@@ -352,18 +352,9 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                return -ENOENT;
        }
 
-       mem = request_mem_region(res->start, resource_size(res), pdev->name);
-       if (!mem) {
-               pr_debug("%s: RTC registers at %08x are not free\n",
-                       pdev->name, res->start);
-               return -EBUSY;
-       }
-
-       rtc_base = ioremap(res->start, resource_size(res));
-       if (!rtc_base) {
-               pr_debug("%s: RTC registers can't be mapped\n", pdev->name);
-               goto fail;
-       }
+       rtc_base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(rtc_base))
+               return PTR_ERR(rtc_base);
 
        /* Enable the clock/module so that we can access the registers */
        pm_runtime_enable(&pdev->dev);
@@ -375,7 +366,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
        }
 
-       rtc = rtc_device_register(pdev->name, &pdev->dev,
+       rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                        &omap_rtc_ops, THIS_MODULE);
        if (IS_ERR(rtc)) {
                pr_debug("%s: can't register RTC device, err %ld\n",
@@ -383,7 +374,6 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                goto fail0;
        }
        platform_set_drvdata(pdev, rtc);
-       dev_set_drvdata(&rtc->dev, mem);
 
        /* clear pending irqs, and set 1/second periodic,
         * which we'll use instead of update irqs
@@ -401,18 +391,18 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
 
        /* handle periodic and alarm irqs */
-       if (request_irq(omap_rtc_timer, rtc_irq, 0,
+       if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
                        dev_name(&rtc->dev), rtc)) {
                pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
                        pdev->name, omap_rtc_timer);
-               goto fail1;
+               goto fail0;
        }
        if ((omap_rtc_timer != omap_rtc_alarm) &&
-               (request_irq(omap_rtc_alarm, rtc_irq, 0,
+               (devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
                        dev_name(&rtc->dev), rtc))) {
                pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
                        pdev->name, omap_rtc_alarm);
-               goto fail2;
+               goto fail0;
        }
 
        /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
@@ -446,25 +436,16 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
 
        return 0;
 
-fail2:
-       free_irq(omap_rtc_timer, rtc);
-fail1:
-       rtc_device_unregister(rtc);
 fail0:
        if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
                rtc_writel(0, OMAP_RTC_KICK0_REG);
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
-       iounmap(rtc_base);
-fail:
-       release_mem_region(mem->start, resource_size(mem));
        return -EIO;
 }
 
 static int __exit omap_rtc_remove(struct platform_device *pdev)
 {
-       struct rtc_device       *rtc = platform_get_drvdata(pdev);
-       struct resource         *mem = dev_get_drvdata(&rtc->dev);
        const struct platform_device_id *id_entry =
                                platform_get_device_id(pdev);
 
@@ -473,12 +454,6 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
        /* leave rtc running, but disable irqs */
        rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
 
-       free_irq(omap_rtc_timer, rtc);
-
-       if (omap_rtc_timer != omap_rtc_alarm)
-               free_irq(omap_rtc_alarm, rtc);
-
-       rtc_device_unregister(rtc);
        if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
                rtc_writel(0, OMAP_RTC_KICK0_REG);
 
@@ -486,8 +461,6 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
 
-       iounmap(rtc_base);
-       release_mem_region(mem->start, resource_size(mem));
        return 0;
 }