The patch titled
Blackfin RTC Driver: dont let RTC programming in bootloaders randomly cause ~5 second boot delays
has been added to the -mm tree. Its filename is
blackfin-rtc-driver-dont-let-rtc-programming-in-bootloaders-randomly-cause-5-second-boot-delays.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: Blackfin RTC Driver: dont let RTC programming in bootloaders randomly cause ~5 second boot delays
From: Mike Frysinger <vapier.adi@xxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier.adi@xxxxxxxxx>
Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx>
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-bfin.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -puN drivers/rtc/rtc-bfin.c~blackfin-rtc-driver-dont-let-rtc-programming-in-bootloaders-randomly-cause-5-second-boot-delays drivers/rtc/rtc-bfin.c
--- a/drivers/rtc/rtc-bfin.c~blackfin-rtc-driver-dont-let-rtc-programming-in-bootloaders-randomly-cause-5-second-boot-delays
+++ a/drivers/rtc/rtc-bfin.c
@@ -363,6 +363,7 @@ static int __devinit bfin_rtc_probe(stru
struct bfin_rtc *rtc;
struct device *dev = &pdev->dev;
int ret = 0;
+ unsigned long timeout;
dev_dbg_stamp(dev);
@@ -377,6 +378,13 @@ static int __devinit bfin_rtc_probe(stru
ret = request_irq(IRQ_RTC, bfin_rtc_interrupt, IRQF_SHARED, pdev->name, dev);
if (unlikely(ret))
goto err;
+ /* sometimes the bootloader touched things, but the write complete was not
+ * enabled, so let's just do a quick timeout here since the IRQ will not fire ...
+ */
+ timeout = jiffies + HZ;
+ while (bfin_read_RTC_ISTAT() & RTC_ISTAT_WRITE_PENDING)
+ if (time_after(jiffies, timeout))
+ break;
bfin_rtc_reset(dev, RTC_ISTAT_WRITE_COMPLETE);
bfin_write_RTC_SWCNT(0);
_
Patches currently in -mm which might be from vapier.adi@xxxxxxxxx are
origin.patch
blackfin-rtc-driver-move-irq-request-free-out-of-open-release-and-into-probe-remove-so-that-the-non-dev-interfaces-like-sysfs-work-as-expected.patch
blackfin-rtc-driver-do-all-initialization-before-we-register-the-rtc-and-make-it-available.patch
blackfin-rtc-driver-dont-let-rtc-programming-in-bootloaders-randomly-cause-5-second-boot-delays.patch
linux-next.patch
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