static void mxc_set_mode(enum clock_event_mode mode,
				struct clock_event_device *evt)
{
	unsigned long flags;

	/*
	 * The timer interrupt generation is disabled at least
	 * for enough time to call mxc_set_next_event()
	 */
	local_irq_save(flags);

	/* Disable interrupt in GPT module */
	gpt_irq_disable();

	if (mode != clockevent_mode) {
		/* Set event time into far-far future */
		if (timer_is_v2())
			__raw_writel(__raw_readl(timer_base + V2_TCN) - 3,
					timer_base + V2_TCMP);
		else
			__raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
					timer_base + MX1_2_TCMP);

		/* Clear pending interrupt */
		gpt_irq_acknowledge();
	}

#ifdef DEBUG
	printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
		clock_event_mode_label[clockevent_mode],
		clock_event_mode_label[mode]);
#endif /* DEBUG */

	/* Remember timer mode */
	clockevent_mode = mode;
	local_irq_restore(flags);

	switch (mode) {
	case CLOCK_EVT_MODE_PERIODIC:
		printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
				"supported for i.MX\n");
		break;
	case CLOCK_EVT_MODE_ONESHOT:
	/*
	 * Do not put overhead of interrupt enable/disable into
	 * mxc_set_next_event(), the core has about 4 minutes
	 * to call mxc_set_next_event() or shutdown clock after
	 * mode switching
	 */
		local_irq_save(flags);
		gpt_irq_enable();
		local_irq_restore(flags);
		break;
	case CLOCK_EVT_MODE_SHUTDOWN:
	case CLOCK_EVT_MODE_UNUSED:
	case CLOCK_EVT_MODE_RESUME:
		/* Left event sources disabled, no more interrupts appear */
		break;
	}
}
Beispiel #2
0
static void mxc_set_mode(enum clock_event_mode mode,
				struct clock_event_device *evt)
{
	unsigned long flags;

	
	local_irq_save(flags);

	
	gpt_irq_disable();

	if (mode != clockevent_mode) {
		
		if (cpu_is_mx3() || cpu_is_mx25())
			__raw_writel(__raw_readl(timer_base + MX3_TCN) - 3,
					timer_base + MX3_TCMP);
		else
			__raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
					timer_base + MX1_2_TCMP);

		
		gpt_irq_acknowledge();
	}

#ifdef DEBUG
	printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
		clock_event_mode_label[clockevent_mode],
		clock_event_mode_label[mode]);
#endif 

	
	clockevent_mode = mode;
	local_irq_restore(flags);

	switch (mode) {
	case CLOCK_EVT_MODE_PERIODIC:
		printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
				"supported for i.MX\n");
		break;
	case CLOCK_EVT_MODE_ONESHOT:
	
		local_irq_save(flags);
		gpt_irq_enable();
		local_irq_restore(flags);
		break;
	case CLOCK_EVT_MODE_SHUTDOWN:
	case CLOCK_EVT_MODE_UNUSED:
	case CLOCK_EVT_MODE_RESUME:
		
		break;
	}
}
Beispiel #3
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/*
 * IRQ handler for the timer
 */
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
	struct clock_event_device *evt = &clockevent_mxc;
	uint32_t tstat;

	tstat = __raw_readl(TIMER_BASE + MXC_TSTAT);

	gpt_irq_acknowledge();

	evt->event_handler(evt);

	return IRQ_HANDLED;
}
/*
 * IRQ handler for the timer
 */
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
	struct clock_event_device *evt = &clockevent_mxc;
	uint32_t tstat;

	if (timer_is_v2())
		tstat = __raw_readl(timer_base + V2_TSTAT);
	else
		tstat = __raw_readl(timer_base + MX1_2_TSTAT);

	gpt_irq_acknowledge();

	evt->event_handler(evt);

	return IRQ_HANDLED;
}
Beispiel #5
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/*
 * IRQ handler for the timer
 */
static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
{
	struct clock_event_device *evt = &clockevent_mxc;
	uint32_t tstat;

	if (timer_is_v2())
		tstat = __raw_readl(timer_base + V2_TSTAT);
	else
		tstat = __raw_readl(timer_base + MX1_2_TSTAT);

#ifndef CONFIG_IPIPE
	gpt_irq_acknowledge();
#else /* !CONFIG_IPIPE */
	__ipipe_tsc_update();
#endif /* !CONFIG_IPIPE */

	evt->event_handler(evt);

	return IRQ_HANDLED;
}
Beispiel #6
0
void __ipipe_mach_acktimer(void)
{
	gpt_irq_acknowledge();
}