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ARM: at91: convert timer suspend/resume to clock_event_device

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Move at91's timer suspend/resume functions from struct sys_timer
at91sam926x_timer into struct clock_event_device pit_clkevt. This
will allow the sys_timer suspend/resume fields to be removed, and
eventually lead to a complete removal of struct sys_timer.

Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2012-11-07 16:32:41 -07:00
parent 23c197b77f
commit 49356ae94c
1 changed files with 26 additions and 21 deletions
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47
arch/arm/mach-at91/at91sam926x_time.c
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@ -104,12 +104,38 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
}
}
static void at91sam926x_pit_suspend(struct clock_event_device *cedev)
{
/* Disable timer */
pit_write(AT91_PIT_MR, 0);
}
static void at91sam926x_pit_reset(void)
{
/* Disable timer and irqs */
pit_write(AT91_PIT_MR, 0);
/* Clear any pending interrupts, wait for PIT to stop counting */
while (PIT_CPIV(pit_read(AT91_PIT_PIVR)) != 0)
cpu_relax();
/* Start PIT but don't enable IRQ */
pit_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN);
}
static void at91sam926x_pit_resume(struct clock_event_device *cedev)
{
at91sam926x_pit_reset();
}
static struct clock_event_device pit_clkevt = {
.name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC,
.shift = 32,
.rating = 100,
.set_mode = pit_clkevt_mode,
.suspend = at91sam926x_pit_suspend,
.resume = at91sam926x_pit_resume,
};
@ -150,19 +176,6 @@ static struct irqaction at91sam926x_pit_irq = {
.irq = NR_IRQS_LEGACY + AT91_ID_SYS,
};
static void at91sam926x_pit_reset(void)
{
/* Disable timer and irqs */
pit_write(AT91_PIT_MR, 0);
/* Clear any pending interrupts, wait for PIT to stop counting */
while (PIT_CPIV(pit_read(AT91_PIT_PIVR)) != 0)
cpu_relax();
/* Start PIT but don't enable IRQ */
pit_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN);
}
#ifdef CONFIG_OF
static struct of_device_id pit_timer_ids[] = {
{ .compatible = "atmel,at91sam9260-pit" },
@ -250,12 +263,6 @@ static void __init at91sam926x_pit_init(void)
clockevents_register_device(&pit_clkevt);
}
static void at91sam926x_pit_suspend(void)
{
/* Disable timer */
pit_write(AT91_PIT_MR, 0);
}
void __init at91sam926x_ioremap_pit(u32 addr)
{
#if defined(CONFIG_OF)
@ -275,6 +282,4 @@ void __init at91sam926x_ioremap_pit(u32 addr)
struct sys_timer at91sam926x_timer = {
.init = at91sam926x_pit_init,
.suspend = at91sam926x_pit_suspend,
.resume = at91sam926x_pit_reset,
};