int __hw_clock_source_init(uint32_t start_t)
{
/*
* 1. Use ITIM16-1 as internal time reading
* 2. Use ITIM16-2 for event handling
*/
/* Enable clock for ITIM peripheral */
clock_enable_peripheral(CGC_OFFSET_TIMER, CGC_TIMER_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* init tick & event timer first */
init_hw_timer(ITIM32, ITIM_SOURCE_CLOCK_APB2);
init_hw_timer(ITIM_EVENT_NO, ITIM_SOURCE_CLOCK_32K);
/* Set initial prescaler */
update_prescaler();
/*
* Override the count with the start value now that counting has
* started.
*/
hw_clock_source_set_preload(start_t, 1);
/* Enable interrupt of ITIM */
task_enable_irq(NPCX_IRQ_ITIM32);
return NPCX_IRQ_ITIM32;
}
int __hw_clock_source_init(uint32_t start_t)
{
/* Set the reload and current value. */
GR_TIMEHS_BGLOAD(0, 1) = 0xffffffff;
GR_TIMEHS_LOAD(0, 1) = 0xffffffff;
/* HW Timer enabled, periodic, interrupt enabled, 32-bit, wrapping */
GR_TIMEHS_CONTROL(0, 1) = 0xe2;
/* Event timer disabled */
__hw_clock_event_clear();
/* Account for the clock speed. */
update_prescaler();
/* Clear any pending interrupts */
GR_TIMEHS_INTCLR(0, 1) = 0x1;
/* Force the time to whatever we're told it is */
__hw_clock_source_set(start_t);
/* Here we go... */
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT1);
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT2);
/* Return the Event timer IRQ number (NOT the HW timer IRQ) */
return GC_IRQNUM_TIMEHS0_TIMINT2;
}
