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

commit 0e95325525 upstream.

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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guo Zeng 2014-12-10 15:52:24 -08:00 committed by Greg Kroah-Hartman
parent c3b70f0bbb
commit caa2e48c4d
1 changed files with 8 additions and 8 deletions
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16
drivers/rtc/rtc-sirfsoc.c
View File

@ -290,14 +290,6 @@ 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);
@ -312,6 +304,14 @@ 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,