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ARM: 7413/1: move read_{boot,persistent}_clock to the architecture level

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At the moment, read_persistent_clock is implemented at the
platform level, which makes it impossible to compile these
platforms in a single kernel.

Implement these two functions at the architecture level, and
provide a thin registration interface for both read_boot_clock
and read_persistent_clock. The two affected platforms (OMAP and
Tegra) are converted at the same time.

Reported-by: Jeff Ohlstein <johlstei@codeaurora.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Marc Zyngier
2012-05-05 19:28:44 +01:00
committed by Russell King
parent f67860a76f
commit bd0493eaaf
4 changed files with 48 additions and 4 deletions
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36
arch/arm/kernel/time.c
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@@ -110,6 +110,42 @@ void timer_tick(void)
}
#endif
static void dummy_clock_access(struct timespec *ts)
{
ts->tv_sec = 0;
ts->tv_nsec = 0;
}
static clock_access_fn __read_persistent_clock = dummy_clock_access;
static clock_access_fn __read_boot_clock = dummy_clock_access;;
void read_persistent_clock(struct timespec *ts)
{
__read_persistent_clock(ts);
}
void read_boot_clock(struct timespec *ts)
{
__read_boot_clock(ts);
}
int __init register_persistent_clock(clock_access_fn read_boot,
clock_access_fn read_persistent)
{
/* Only allow the clockaccess functions to be registered once */
if (__read_persistent_clock == dummy_clock_access &&
__read_boot_clock == dummy_clock_access) {
if (read_boot)
__read_boot_clock = read_boot;
if (read_persistent)
__read_persistent_clock = read_persistent;
return 0;
}
return -EINVAL;
}
#if defined(CONFIG_PM) && !defined(CONFIG_GENERIC_CLOCKEVENTS)
static int timer_suspend(void)
{