clocksource/drivers/h8300: Simplify delta handling

	unsigned int tcora;

};

static unsigned long timer8_get_counter(struct timer8_priv *p)

{

	unsigned long v1, v2, v3;

	int o1, o2;

	o1 = readb(p->mapbase + _8TCSR) & 0x20;

	/* Make sure the timer value is stable. Stolen from acpi_pm.c */

	do {

		o2 = o1;

		v1 = readw(p->mapbase + _8TCNT);

		v2 = readw(p->mapbase + _8TCNT);

		v3 = readw(p->mapbase + _8TCNT);

		o1 = readb(p->mapbase + _8TCSR) & 0x20;

	} while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)

			  || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));

	v2 |= o1 << 10;

	return v2;

}

static irqreturn_t timer8_interrupt(int irq, void *dev_id)

{

	struct timer8_priv *p = dev_id;

	writeb(readb(p->mapbase + _8TCSR) & ~0x40,

		  p->mapbase + _8TCSR);

	writew(p->tcora, p->mapbase + TCORA);

	if (clockevent_state_oneshot(&p->ced))

		writew(0x0000, p->mapbase + _8TCR);

	p->ced.event_handler(&p->ced);

	writeb(readb(p->mapbase + _8TCSR) & ~0x40,

		  p->mapbase + _8TCSR);

	return IRQ_HANDLED;

}

static void timer8_set_next(struct timer8_priv *p, unsigned long delta)

{

	unsigned long now;

	if (delta >= 0x10000)

		pr_warn("delta out of range\n");

	now = timer8_get_counter(p);

	p->tcora = delta;

	writeb(readb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);

	if (delta > now)

	writeb(readb(p->mapbase + _8TCR) & ~0x40, p->mapbase + _8TCR);

	writew(0, p->mapbase + _8TCNT);

	writew(delta, p->mapbase + TCORA);

	else

		writew(now + 1, p->mapbase + TCORA);

	writeb(readb(p->mapbase + _8TCR) | 0x40, p->mapbase + _8TCR);

}

static int timer8_enable(struct timer8_priv *p)