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Revert "sched/clock/clock_initialize.c: clock_inittime() needs to be done with CONFIG_SCHED_TICKLESS and clock_initialize should skip clock_inittime() for external RTC case since the RTC isn't ready yet."

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This reverts commit 2bc709d4b9.

Commit 2bc709d4b9 was intended to handle the case where up_timer_gettime may not start from zero case.  However, this change has the side-effect of breaking every implementation of tickless mode:  After this change the tickless timer structures are used before they are initialized in clock_inittime().  Initialization happens later when up_initialize is called() when arm_timer_initialize().

Since the tickless mode timer is very special, one solution might be to

1. Rename xxx_timer_initialize to up_timer_initialize
2  Move up_timer_initialize to include/nuttx/arch.h
3.  Call it from clock subsystem instead up_initialize

Basically, this change make timer initialization almost same as rtc initialization(up_rtc_initialize).

For now, however, we just need to revert the change.
This commit is contained in:
Gregory Nutt
2019-04-26 07:24:57 -06:00
parent 7f2e6ff1ee
commit 0863e771a9
1 changed files with 22 additions and 16 deletions
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sched/clock/clock_initialize.c
+22 -16
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@@ -65,9 +65,9 @@
#ifndef CONFIG_SCHED_TICKLESS #ifndef CONFIG_SCHED_TICKLESS
#ifdef CONFIG_SYSTEM_TIME64 #ifdef CONFIG_SYSTEM_TIME64
volatile uint64_t g_system_timer = INITIAL_SYSTEM_TIMER_TICKS; volatile uint64_t g_system_timer;
#else #else
volatile uint32_t g_system_timer = INITIAL_SYSTEM_TIMER_TICKS; volatile uint32_t g_system_timer;
#endif #endif
#endif #endif
@@ -170,31 +170,37 @@ int clock_basetime(FAR struct timespec *tp)
* *
****************************************************************************/ ****************************************************************************/
#ifdef CONFIG_RTC
static void clock_inittime(void) static void clock_inittime(void)
{ {
/* (Re-)initialize the time value to match the RTC */ /* (Re-)initialize the time value to match the RTC */
#ifndef CONFIG_CLOCK_TIMEKEEPING #ifndef CONFIG_CLOCK_TIMEKEEPING
struct timespec ts; #ifndef CONFIG_RTC_HIRES
clock_basetime(&g_basetime); clock_basetime(&g_basetime);
clock_systimespec(&ts); #endif
#ifndef CONFIG_SCHED_TICKLESS
/* Adjust base time to hide initial timer ticks. */ g_system_timer = INITIAL_SYSTEM_TIMER_TICKS;
if (g_system_timer > 0)
g_basetime.tv_sec -= ts.tv_sec;
g_basetime.tv_nsec -= ts.tv_nsec;
while (g_basetime.tv_nsec < 0)
{ {
g_basetime.tv_nsec += NSEC_PER_SEC; struct timespec ts;
g_basetime.tv_sec--;
(void)clock_ticks2time((sclock_t)g_system_timer, &ts);
/* Adjust base time to hide initial timer ticks. */
g_basetime.tv_sec -= ts.tv_sec;
g_basetime.tv_nsec -= ts.tv_nsec;
while (g_basetime.tv_nsec < 0)
{
g_basetime.tv_nsec += NSEC_PER_SEC;
g_basetime.tv_sec--;
}
} }
#endif /* !CONFIG_SCHED_TICKLESS */
#else #else
clock_inittimekeeping(); clock_inittimekeeping();
#endif #endif
} }
#endif
/**************************************************************************** /****************************************************************************
* Public Functions * Public Functions
@@ -216,11 +222,11 @@ void clock_initialize(void)
*/ */
up_rtc_initialize(); up_rtc_initialize();
#endif
/* Initialize the time value to match the RTC */ /* Initialize the time value to match the RTC */
clock_inittime(); clock_inittime();
#endif
} }
/**************************************************************************** /****************************************************************************