drivers/rtc/rtc-sirfsoc.c: move hardware initilization earlier in probe

Move rtc register to be later than hardware initialization.  The reason
is that devm_rtc_device_register() will do read_time() which is a
callback accessing hardware.  This sometimes causes a hang in the
hardware related callback.

Signed-off-by: Guo Zeng <guo.zeng@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 8 deletions

diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c
index 76e38007ba90..24ba97d3286e 100644
--- a/drivers/rtc/rtc-sirfsoc.c
+++ b/drivers/rtc/rtc-sirfsoc.c
@@ -286,14 +286,6 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
         rtc_div = ((32768 / RTC_HZ) / 2) - 1;
         sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV);
 
-        rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
-                        &sirfsoc_rtc_ops, THIS_MODULE);
-        if (IS_ERR(rtcdrv->rtc)) {
-                err = PTR_ERR(rtcdrv->rtc);
-                dev_err(&pdev->dev, "can't register RTC device\n");
-                return err;
-        }
-
         /* 0x3 -> RTC_CLK */
         sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK,
                         rtcdrv->rtc_base + RTC_CLOCK_SWITCH);
@@ -308,6 +300,14 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
         rtcdrv->overflow_rtc =
                 sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE);
 
+        rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+                        &sirfsoc_rtc_ops, THIS_MODULE);
+        if (IS_ERR(rtcdrv->rtc)) {
+                err = PTR_ERR(rtcdrv->rtc);
+                dev_err(&pdev->dev, "can't register RTC device\n");
+                return err;
+        }
+
         rtcdrv->irq = platform_get_irq(pdev, 0);
         err = devm_request_irq(
                         &pdev->dev,