From 012e52e15e7ebbc7b08165e8f4b10f71a3e6810b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 10 Jan 2012 15:10:41 -0800 Subject: drivers/rtc/rtc-ab8500.c: change msleep() to usleep_range() The resolution of msleep is related to HZ, so with HZ set to 100 any msleep of less than 10ms will become ~10ms. This is not what we want. Use the hrtimer-based usleep_range() and allow for some slack in the non-critical path so we have more control of what is happening here. Signed-off-by: Linus Walleij Cc: Jonas Aaberg Cc: Alessandro Zummo Cc: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/rtc-ab8500.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index 82a348095a715d..919b2e5cb7f035 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -90,7 +90,7 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) /* Early AB8500 chips will not clear the rtc read request bit */ if (abx500_get_chip_id(dev) == 0) { - msleep(1); + usleep_range(1000, 1000); } else { /* Wait for some cycles after enabling the rtc read in ab8500 */ while (time_before(jiffies, timeout)) { @@ -102,7 +102,7 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) if (!(value & RTC_READ_REQUEST)) break; - msleep(1); + usleep_range(1000, 5000); } } @@ -295,7 +295,7 @@ static int __devinit ab8500_rtc_probe(struct platform_device *pdev) return err; /* Wait for reset by the PorRtc */ - msleep(1); + usleep_range(1000, 5000); err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC, AB8500_RTC_STAT_REG, &rtc_ctrl); -- cgit 1.2.3-korg