ARM: at91: convert timer suspend/resume to clock_event_device

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>

1 files changed, 26 insertions, 21 deletions

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 358412f1f5f8..f7191e11df27 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -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,
 };