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ARM, clocksource/drivers: Provide read_boot_clock64() and read_persistent_clock64() and use them

Browse source 
As part of addressing "y2038 problem" for in-kernel uses, this
patch converts read_boot_clock() to read_boot_clock64() and
read_persistent_clock() to read_persistent_clock64() using
timespec64 by converting clock_access_fn to use timespec64.

Signed-off-by: Xunlei Pang <[email protected]>
Signed-off-by: John Stultz <[email protected]>
Acked-by: Thierry Reding <[email protected]> (for tegra part)
Cc: Russell King <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Xunlei Pang 2015-04-01 20:34:26 -07:00 • committed by Ingo Molnar
commit cb850717b0
4 changed files with 6 additions and 23 deletions
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10
drivers/clocksource/tegra20_timer.c
View file

@ -141,14 +141,6 @@ static void tegra_read_persistent_clock64(struct timespec64 *ts)
*ts = persistent_ts;
}
static void tegra_read_persistent_clock(struct timespec *ts)
{
struct timespec ts64;
tegra_read_persistent_clock64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
static unsigned long tegra_delay_timer_read_counter_long(void)
{
return readl(timer_reg_base + TIMERUS_CNTR_1US);
@ -259,7 +251,7 @@ static void __init tegra20_init_rtc(struct device_node *np)
else
clk_prepare_enable(clk);
register_persistent_clock(NULL, tegra_read_persistent_clock);
register_persistent_clock(NULL, tegra_read_persistent_clock64);
}
CLOCKSOURCE_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);