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SAMV7: Add support for CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP

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This commit is contained in:
Gregory Nutt 2015-12-02 09:21:34 -06:00
parent 3ce3dbc6ed
commit 192772b7ee
4 changed files with 29 additions and 2 deletions
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1
arch/arm/Kconfig
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@ -190,6 +190,7 @@ config ARCH_CHIP_SAMV7
select ARCH_CORTEXM7
select ARCH_HAVE_MPU
select ARCH_HAVE_RAMFUNCS
select ARCH_HAVE_TICKLESS
select ARMV7M_HAVE_STACKCHECK
---help---
Atmel SAMV7 (ARM Cortex-M7) architectures

26
arch/arm/src/sama5/sam_tickless.c
View File

@ -243,6 +243,9 @@ static void sam_oneshot_handler(void *arg)
void up_timer_initialize(void)
{
#ifdef CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP
uint64_t max_delay;
#endif
int ret;
/* Initialize the one-shot timer */
@ -256,6 +259,29 @@ void up_timer_initialize(void)
PANIC();
}
#ifdef CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP
/* Get the maximum delay of the one-shot timer in microseconds */
ret = sam_oneshot_max_delay(&g_tickless.oneshot, &max_delay);
if (ret < 0)
{
tclldbg("ERROR: sam_oneshot_max_delay failed\n");
PANIC();
}
/* Convert this to configured clock ticks for use by the OS timer logic */
max_delay /= CONFIG_USEC_PER_TICK;
if (max_delay > (uint64_t)UINT32_MAX)
{
g_oneshot_maxticks = UINT32_MAX;
}
else
{
g_oneshot_maxticks = (uint32_t)max_delay;
}
#endif
/* Initialize the free-running timer */
ret = sam_freerun_initialize(&g_tickless.freerun,

2
arch/arm/src/samv7/sam_oneshot.c
View File

@ -467,7 +467,7 @@ int sam_oneshot_cancel(struct sam_oneshot_s *oneshot, struct timespec *ts)
*
****************************************************************************/
#if 0 /* Not used */
#ifdef CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP
int sam_oneshot_max_delay(struct sam_oneshot_s *oneshot, uint64_t *usec)
{
DEBUGASSERT(oneshot && usec);

2
arch/arm/src/samv7/sam_oneshot.h
View File

@ -141,7 +141,7 @@ int sam_oneshot_initialize(struct sam_oneshot_s *oneshot, int chan,
*
****************************************************************************/
#if 0 /* Not used */
#ifdef CONFIG_SCHED_TICKLESS_LIMIT_MAX_SLEEP
int sam_oneshot_max_delay(struct sam_oneshot_s *oneshot, uint64_t *usec);
#endif