arch/avr32/include/arch/timeout.h

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#ifndef ARCH_TIMEOUT_H_INCLUDED
#define ARCH_TIMEOUT_H_INCLUDED

#include <arch/sysreg.h>
#include <chip/clk.h>

struct timeout {
        uint32_t        base;
        uint32_t        delta;
};

static inline void timeout_init_us(struct timeout *timeout, unsigned int us)
{
        timeout->base = sysreg_read(COUNT);
        timeout->delta = ((get_cpu_clock_rate() / 10000) * us) / 100;
}

static inline bool timeout_has_expired(const struct timeout *timeout)
{
        uint32_t        now;

        now = sysreg_read(COUNT);
        if ((now - timeout->base) > timeout->delta)
                return true;
        else
                return false;
}

#endif /* ARCH_TIMEOUT_H_INCLUDED */

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