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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-20 09:36:52 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-20 09:36:52 +0400 |
| commit | 880102e78547c1db158a17e36cf0cdd98e7ad710 (patch) | |
| tree | 3fff9cc54c44dafe275cfabefb96c589e08d971d /drivers/rtc | |
| parent | 3d07f0e83d4323d2cd45cc583f7cf1957aca3cac (diff) | |
| parent | 39ab05c8e0b519ff0a04a869f065746e6e8c3d95 (diff) | |
| download | linux-880102e78547c1db158a17e36cf0cdd98e7ad710.tar.xz | |
Merge remote branch 'origin/master' into merge
Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi()
call to arch/powerpc/platforms/cell/interrupt.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/rtc/class.c | 23 |
2 files changed, 11 insertions, 19 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index e1878877399c..42891726ea72 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -3,10 +3,10 @@ # config RTC_LIB - tristate + bool menuconfig RTC_CLASS - tristate "Real Time Clock" + bool "Real Time Clock" default n depends on !S390 select RTC_LIB @@ -15,9 +15,6 @@ menuconfig RTC_CLASS be allowed to plug one or more RTCs to your system. You will probably want to enable one or more of the interfaces below. - This driver can also be built as a module. If so, the module - will be called rtc-core. - if RTC_CLASS config RTC_HCTOSYS diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 39013867cbd6..4194e59e14cd 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -41,26 +41,21 @@ static void rtc_device_release(struct device *dev) * system's wall clock; restore it on resume(). */ -static struct timespec delta; static time_t oldtime; +static struct timespec oldts; static int rtc_suspend(struct device *dev, pm_message_t mesg) { struct rtc_device *rtc = to_rtc_device(dev); struct rtc_time tm; - struct timespec ts = current_kernel_time(); if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) return 0; rtc_read_time(rtc, &tm); + ktime_get_ts(&oldts); rtc_tm_to_time(&tm, &oldtime); - /* RTC precision is 1 second; adjust delta for avg 1/2 sec err */ - set_normalized_timespec(&delta, - ts.tv_sec - oldtime, - ts.tv_nsec - (NSEC_PER_SEC >> 1)); - return 0; } @@ -70,10 +65,12 @@ static int rtc_resume(struct device *dev) struct rtc_time tm; time_t newtime; struct timespec time; + struct timespec newts; if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0) return 0; + ktime_get_ts(&newts); rtc_read_time(rtc, &tm); if (rtc_valid_tm(&tm) != 0) { pr_debug("%s: bogus resume time\n", dev_name(&rtc->dev)); @@ -85,15 +82,13 @@ static int rtc_resume(struct device *dev) pr_debug("%s: time travel!\n", dev_name(&rtc->dev)); return 0; } + /* calculate the RTC time delta */ + set_normalized_timespec(&time, newtime - oldtime, 0); - /* restore wall clock using delta against this RTC; - * adjust again for avg 1/2 second RTC sampling error - */ - set_normalized_timespec(&time, - newtime + delta.tv_sec, - (NSEC_PER_SEC >> 1) + delta.tv_nsec); - do_settimeofday(&time); + /* subtract kernel time between rtc_suspend to rtc_resume */ + time = timespec_sub(time, timespec_sub(newts, oldts)); + timekeeping_inject_sleeptime(&time); return 0; } |