#include <libopencm3/stm32/pwr.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/rtc.h>

#include <macros.h>
#include <rtc.h>

int rtc_get_time(struct tm *time)
{
	time_t unix_time;

	if (!time)
		return -1;

	unix_time = rtc_get_counter_val();

	if (!gmtime_r(&unix_time, time))
		return -1;

	return 0;
}

static int rtc_set_time(struct tm *time)
{
	time_t unix_time;

	if (!time)
		return -1;

	unix_time = mktime(time);
	rtc_set_counter_val((uint32_t)unix_time);

	return 0;
}

int rtc_init(struct tm *time)
{
	rtc_auto_awake(RCC_LSI, 0x7fff);
	rtc_set_time(time);

	return 0;
}