Commit 5b30d5bf authored by Stephen Warren's avatar Stephen Warren
Browse files

ARM: pxa: convert timer suspend/resume to clock_event_device 



Move PXA's timer suspend/resume functions from struct sys_timer
pxa_timer into struct clock_event_device ckevt_pxa_osmr0. This
will allow the sys_timer suspend/resume fields to be removed, and
eventually lead to a complete removal of struct sys_timer.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: default avatarEric Miao <eric.y.miao@gmail.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent 49356ae9

arch/arm/mach-pxa/time.c

+38 −38
Original line number Diff line number Diff line
@@ -89,12 +89,50 @@ pxa_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *dev) 
	}

}



#ifdef CONFIG_PM

static unsigned long osmr[4], oier, oscr;



static void pxa_timer_suspend(struct clock_event_device *cedev)

{

	osmr[0] = readl_relaxed(OSMR0);

	osmr[1] = readl_relaxed(OSMR1);

	osmr[2] = readl_relaxed(OSMR2);

	osmr[3] = readl_relaxed(OSMR3);

	oier = readl_relaxed(OIER);

	oscr = readl_relaxed(OSCR);

}



static void pxa_timer_resume(struct clock_event_device *cedev)

{

	/*

	 * Ensure that we have at least MIN_OSCR_DELTA between match

	 * register 0 and the OSCR, to guarantee that we will receive

	 * the one-shot timer interrupt.  We adjust OSMR0 in preference

	 * to OSCR to guarantee that OSCR is monotonically incrementing.

	 */

	if (osmr[0] - oscr < MIN_OSCR_DELTA)

		osmr[0] += MIN_OSCR_DELTA;



	writel_relaxed(osmr[0], OSMR0);

	writel_relaxed(osmr[1], OSMR1);

	writel_relaxed(osmr[2], OSMR2);

	writel_relaxed(osmr[3], OSMR3);

	writel_relaxed(oier, OIER);

	writel_relaxed(oscr, OSCR);

}

#else

#define pxa_timer_suspend NULL

#define pxa_timer_resume NULL

#endif



static struct clock_event_device ckevt_pxa_osmr0 = {

	.name		= "osmr0",

	.features	= CLOCK_EVT_FEAT_ONESHOT,

	.rating		= 200,

	.set_next_event	= pxa_osmr0_set_next_event,

	.set_mode	= pxa_osmr0_set_mode,

	.suspend	= pxa_timer_suspend,

	.resume		= pxa_timer_resume,

};



static struct irqaction pxa_ost0_irq = {
@@ -127,44 +165,6 @@ static void __init pxa_timer_init(void) 
	clockevents_register_device(&ckevt_pxa_osmr0);

}



#ifdef CONFIG_PM

static unsigned long osmr[4], oier, oscr;



static void pxa_timer_suspend(void)

{

	osmr[0] = readl_relaxed(OSMR0);

	osmr[1] = readl_relaxed(OSMR1);

	osmr[2] = readl_relaxed(OSMR2);

	osmr[3] = readl_relaxed(OSMR3);

	oier = readl_relaxed(OIER);

	oscr = readl_relaxed(OSCR);

}



static void pxa_timer_resume(void)

{

	/*

	 * Ensure that we have at least MIN_OSCR_DELTA between match

	 * register 0 and the OSCR, to guarantee that we will receive

	 * the one-shot timer interrupt.  We adjust OSMR0 in preference

	 * to OSCR to guarantee that OSCR is monotonically incrementing.

	 */

	if (osmr[0] - oscr < MIN_OSCR_DELTA)

		osmr[0] += MIN_OSCR_DELTA;



	writel_relaxed(osmr[0], OSMR0);

	writel_relaxed(osmr[1], OSMR1);

	writel_relaxed(osmr[2], OSMR2);

	writel_relaxed(osmr[3], OSMR3);

	writel_relaxed(oier, OIER);

	writel_relaxed(oscr, OSCR);

}

#else

#define pxa_timer_suspend NULL

#define pxa_timer_resume NULL

#endif



struct sys_timer pxa_timer = {

	.init		= pxa_timer_init,

	.suspend	= pxa_timer_suspend,

	.resume		= pxa_timer_resume,

};

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