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Commit bfa76bb1 authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

clocksource: sh_cmt: Request IRQ for clock event device only 



Clock sources don't need an IRQ, request the IRQ only for channels used
as clock event devices.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
parent e7a9bcc2

drivers/clocksource/sh_cmt.c

+27 −24
Original line number Diff line number Diff line
@@ -785,10 +785,28 @@ static void sh_cmt_clock_event_resume(struct clock_event_device *ced) 
	pm_genpd_syscore_poweron(&ch->cmt->pdev->dev);

}



static void sh_cmt_register_clockevent(struct sh_cmt_channel *ch,

static int sh_cmt_register_clockevent(struct sh_cmt_channel *ch,

				      const char *name)

{

	struct clock_event_device *ced = &ch->ced;

	int irq;

	int ret;



	irq = platform_get_irq(ch->cmt->pdev, ch->cmt->legacy ? 0 : ch->index);

	if (irq < 0) {

		dev_err(&ch->cmt->pdev->dev, "ch%u: failed to get irq\n",

			ch->index);

		return irq;

	}



	ret = request_irq(irq, sh_cmt_interrupt,

			  IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,

			  dev_name(&ch->cmt->pdev->dev), ch);

	if (ret) {

		dev_err(&ch->cmt->pdev->dev, "ch%u: failed to request irq %d\n",

			ch->index, irq);

		return ret;

	}



	ced->name = name;

	ced->features = CLOCK_EVT_FEAT_PERIODIC;
@@ -803,14 +821,20 @@ static void sh_cmt_register_clockevent(struct sh_cmt_channel *ch, 
	dev_info(&ch->cmt->pdev->dev, "ch%u: used for clock events\n",

		 ch->index);

	clockevents_register_device(ced);



	return 0;

}



static int sh_cmt_register(struct sh_cmt_channel *ch, const char *name,

			   bool clockevent, bool clocksource)

{

	int ret;



	if (clockevent) {

		ch->cmt->has_clockevent = true;

		sh_cmt_register_clockevent(ch, name);

		ret = sh_cmt_register_clockevent(ch, name);

		if (ret < 0)

			return ret;

	}



	if (clocksource) {
@@ -825,7 +849,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index, 
				unsigned int hwidx, bool clockevent,

				bool clocksource, struct sh_cmt_device *cmt)

{

	int irq;

	int ret;



	/* Skip unused channels. */
@@ -869,17 +892,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index, 
		}

	}



	if (cmt->legacy)

		irq = platform_get_irq(cmt->pdev, 0);

	else

		irq = platform_get_irq(cmt->pdev, ch->index);



	if (irq < 0) {

		dev_err(&cmt->pdev->dev, "ch%u: failed to get irq\n",

			ch->index);

		return irq;

	}



	if (cmt->info->width == (sizeof(ch->max_match_value) * 8))

		ch->max_match_value = ~0;

	else
@@ -904,15 +916,6 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index, 
	}

	ch->cs_enabled = false;



	ret = request_irq(irq, sh_cmt_interrupt,

			  IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,

			  dev_name(&cmt->pdev->dev), ch);

	if (ret) {

		dev_err(&cmt->pdev->dev, "ch%u: failed to request irq %d\n",

			ch->index, irq);

		return ret;

	}



	return 0;

}